CN111848044A - Green environment-friendly high-performance concrete and preparation method thereof - Google Patents
Green environment-friendly high-performance concrete and preparation method thereof Download PDFInfo
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- CN111848044A CN111848044A CN202010740915.1A CN202010740915A CN111848044A CN 111848044 A CN111848044 A CN 111848044A CN 202010740915 A CN202010740915 A CN 202010740915A CN 111848044 A CN111848044 A CN 111848044A
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- 239000004574 high-performance concrete Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000010902 straw Substances 0.000 claims abstract description 132
- 239000000843 powder Substances 0.000 claims abstract description 117
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000004567 concrete Substances 0.000 claims abstract description 99
- 239000002699 waste material Substances 0.000 claims abstract description 83
- 239000010881 fly ash Substances 0.000 claims abstract description 68
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 57
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000004568 cement Substances 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 42
- 239000004917 carbon fiber Substances 0.000 claims abstract description 42
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 37
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 17
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 42
- 238000001035 drying Methods 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 23
- 239000002253 acid Substances 0.000 claims description 15
- -1 polyphenylene Polymers 0.000 claims description 12
- 240000008042 Zea mays Species 0.000 claims description 11
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 11
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 11
- 235000005822 corn Nutrition 0.000 claims description 11
- 230000003213 activating effect Effects 0.000 claims description 10
- 239000002134 carbon nanofiber Substances 0.000 claims description 9
- 229920000265 Polyparaphenylene Polymers 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 240000000111 Saccharum officinarum Species 0.000 claims description 3
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 3
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 claims description 3
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 19
- XMPZTFVPEKAKFH-UHFFFAOYSA-P ceric ammonium nitrate Chemical compound [NH4+].[NH4+].[Ce+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XMPZTFVPEKAKFH-UHFFFAOYSA-P 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 235000013339 cereals Nutrition 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 229910021392 nanocarbon Inorganic materials 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 229920006389 polyphenyl polymer Polymers 0.000 description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete, in particular to green environment-friendly high-performance concrete and a preparation method thereof. The green environment-friendly high-performance concrete is prepared from the following raw materials in parts by weight: 100 parts of cement; 20-50 parts of waste concrete; 10-40 parts of fly ash; 10-35 parts of light fine aggregate; 5-30 parts of ceramsite; 5-20 parts of modified straw powder; 1-5 parts of carbon fiber; 1-15 parts of vitrified micro bubbles; 5-10 parts of a water reducing agent and 100-400 parts of water; the modified straw powder is polyacrylic acid fiber modified straw powder. The green environment-friendly high-performance concrete in the technical scheme has high compressive strength, breaking strength, freezing resistance and flame resistance, and has a wide application prospect.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to green environment-friendly high-performance concrete and a preparation method thereof.
Background
Concrete, abbreviated as "concrete (t xi ng)", is a general term for engineering composite materials formed by binding aggregates into a whole by using a binding material. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.
The concrete has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, that is shipbuilding, machinery industry, ocean development, geothermal engineering, etc., but also concrete is an important material.
At present, a large amount of waste concrete exists in China, for example, a large amount of concrete is generated when houses are dismantled, according to incomplete statistics, the construction waste produced in China every year reaches about 1 hundred million t, and the construction waste accumulated for a long time reaches several hundred million t, so that if the construction waste can be recycled, the significance is immeasurable. But the directly recycled waste concrete has the problems of low compressive strength, low frost resistance, flame retardance and the like.
In order to solve the technical problems, the applicant develops a green environment-friendly high-performance concrete containing waste concrete and a preparation method thereof.
Disclosure of Invention
In order to solve the problems, the invention provides a green environment-friendly high-performance concrete, which is prepared from the following raw materials in parts by weight:
100 parts of cement;
20-50 parts of waste concrete;
10-40 parts of fly ash;
10-35 parts of light fine aggregate;
5-30 parts of ceramsite;
5-20 parts of modified straw powder;
1-5 parts of carbon fiber;
1-15 parts of vitrified micro bubbles;
5-10 parts of a water reducing agent; and
100 portions of water and 400 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
In some preferred embodiments, the raw materials for preparing the green environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
25-40 parts of waste concrete;
15-35 parts of fly ash;
2-30 parts of light fine aggregate;
15-25 parts of ceramsite;
8-16 parts of modified straw powder;
1-3 parts of carbon fiber;
6-12 parts of vitrified micro bubbles;
3-8 parts of a water reducing agent; and
200 portions of water and 300 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
In some more preferred embodiments, the raw materials for preparing the green environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
30 parts of waste concrete;
28 parts of fly ash;
25 parts of lightweight fine aggregate;
20 parts of ceramsite;
12 parts of modified straw powder;
3 parts of carbon fiber;
10 parts of vitrified micro bubbles;
5 parts of a water reducing agent; and
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
In some preferred embodiments, the waste concrete is pretreated by the steps of:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
In some preferred embodiments, the lightweight fine aggregate has a density of 5 to 20kg/m3Of polyphenylene particles。
In some preferred embodiments, the weight ratio of the polyacrylic acid fiber to the straw powder in the modified straw powder is (5-10): 20.
in some preferred embodiments, in the modified straw powder, the straw powder is selected from the group consisting of: any one or combination of more of wheat straw, corn straw, rice straw, sugarcane straw and cotton straw.
In some preferred embodiments, the carbon fibers are carbon nanofibers.
In some preferred embodiments, the water reducing agent is selected from any one or a combination of several of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate water reducing agent.
The second aspect of the invention provides a preparation method of the green environment-friendly high-performance concrete, which comprises the following steps:
sequentially adding cement, waste concrete, fly ash, lightweight fine aggregate, ceramsite, modified straw powder, carbon fiber, vitrified micro bubbles, a water reducing agent and water into a stirrer, and uniformly stirring to obtain the environment-friendly high-performance concrete.
The invention has the beneficial effects that:
compared with the prior art, the green environment-friendly high-performance concrete in the technical scheme has higher compressive strength, breaking strength, better frost resistance and flame resistance, and in addition, the density of the green environment-friendly high-performance concrete is less than 240kg/m3And the weight of the building can be effectively reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the embodiments described are only some representative embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention provides a green environment-friendly high-performance concrete, which is prepared from the following raw materials in parts by weight:
100 parts of cement;
20-50 parts of waste concrete;
10-40 parts of fly ash;
10-35 parts of light fine aggregate;
5-30 parts of ceramsite;
5-20 parts of modified straw powder;
1-5 parts of carbon fiber;
1-15 parts of vitrified micro bubbles;
5-10 parts of a water reducing agent; and
100 portions of water and 400 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
In some preferred embodiments, the raw materials for preparing the green environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
25-40 parts of waste concrete;
15-35 parts of fly ash;
20-30 parts of light fine aggregate;
15-25 parts of ceramsite;
8-16 parts of modified straw powder;
1-3 parts of carbon fiber;
6-12 parts of vitrified micro bubbles;
3-8 parts of a water reducing agent; and
200 portions of water and 300 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
In some more preferred embodiments, the raw materials for preparing the green environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
30 parts of waste concrete;
28 parts of fly ash;
25 parts of lightweight fine aggregate;
20 parts of ceramsite;
12 parts of modified straw powder;
3 parts of carbon fiber;
10 parts of vitrified micro bubbles;
5 parts of a water reducing agent; and
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The term "cement"
The term "cement" is not particularly limited to the technical solution of the present application, and the technical effect of the present application can be achieved by cement known to those skilled in the art.
In some preferred embodiments, the cement is a sulphoaluminate cement.
The term "waste concrete"
The term "waste concrete" is not particularly limited to the technical solution of the present application, and the technical effect of the present application can be achieved by cement known to those skilled in the art.
In some preferred embodiments, the waste concrete is pretreated by the steps of:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The applicant has unexpectedly found that in the step of activating the waste concrete, the concentration of the acetic acid solution cannot be too high or too low, and that in the acetic acid solution with the concentration of 3%, stirring for 0.5h can obtain a proper active site, and the proper active site can be better matched with other components.
The term "fly ash"
The term "fly ash": is fine ash collected from flue gas generated after coal combustion, and the fly ash is main solid waste discharged from a coal-fired power plant. The technical solution of the present application is not particularly limited, and the technical effects of the present application can be achieved by using fly ash known to those skilled in the art.
In some preferred embodiments, the fly ash is ultra-fine fly ash, having an average particle size of less than 5 μm.
The term "lightweight fine aggregate"
The term "lightweight fine aggregate" is not particularly limited to the technical means of the present application, and the technical effects of the present application can be achieved as long as they are known to those skilled in the art.
In some preferred embodiments, the lightweight fine aggregate has a bulk density of 5 to 20kg/m3The polyphenylene particle of (4).
The term "polystyrene particles" is crushed from recycled waste polystyrene foam. The technical scheme of this application utilizes the discarded object, and changing waste into valuables can reach energy-concerving and environment-protective technological effect.
In some preferred specific embodiments, the lightweight fine aggregate is subjected to a modification treatment, and the modification treatment comprises the following steps:
adding the mixture of the lightweight fine aggregate and the maleic anhydride into a double-screw extruder together, adding an initiator with the mass of 1% of the mixture after the mixture is melted, wherein the initiator is a styrene solution containing dicumyl peroxide, the mass concentration of the dicumyl peroxide is 5%, stirring and reacting for 2 hours in a melting state, and drying and crushing the mixture for later use after the mixture is extruded out by the double-screw extruder.
The term "haydite"
The term "ceramsite" is not particularly limited in terms of the technical scheme of the present application, and can achieve the technical effects of the present application as long as the technical effects are known to those skilled in the art.
In some preferred specific embodiments, the ceramsite is any one or a mixture of several of fly ash ceramsite, shale ceramsite, coal gangue ceramsite, clay ceramsite and garbage ceramsite.
In some more preferred embodiments, the ceramsite is a shale ceramsite.
The term "modified straw powder"
The modified straw powder is polyacrylic acid fiber modified straw powder.
In some preferred embodiments, in the modified straw powder, the straw powder is selected from the group consisting of: any one or combination of more of wheat straw, corn straw, rice straw, sugarcane straw and cotton straw.
In some preferred embodiments, the preparation method of the polyacrylic acid fiber modified straw powder comprises the following steps:
adding a certain amount of polyacrylic acid fiber and deionized water into a three-neck flask together, stirring at 45 deg.C for 0.5h, and sequentially adding straw powder and 5 × 10-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder.
In some preferred embodiments, the weight ratio of the polyacrylic acid fiber to the straw powder in the modified straw powder is (5-10): 20.
more preferably, the weight ratio of the polyacrylic acid fiber to the straw powder in the modified straw powder is 1: 4.
the term "carbon fiber"
The term "carbon fiber" is not particularly limited to the technical solution of the present application, as long as the technical effect of the present application can be achieved as known by those skilled in the art.
In some preferred embodiments, the carbon fibers are carbon nanofibers.
The term "vitrified microbead"
The term "vitrified small bubbles" is not particularly limited to the technical means of the present application, and the technical effects of the present application can be achieved as long as they are known to those skilled in the art.
The term "water reducing agent"
The term "water reducing agent" is not particularly limited to the technical solution of the present application, as long as the technical effect of the present application can be achieved as known by those skilled in the art.
In some preferred specific embodiments, the water reducing agent is selected from any one or a combination of several of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate water reducing agent.
The term "water"
The term "water" is not particularly limited to the technical solution of the present application, as long as the technical effect of the present application can be achieved as known by those skilled in the art.
The second aspect of the invention provides a preparation method of the green environment-friendly high-performance concrete, which comprises the following steps:
sequentially adding cement, waste concrete, fly ash, lightweight fine aggregate, ceramsite, modified straw powder, carbon fiber, vitrified micro bubbles, water reducer and water into a stirrer, and uniformly stirring to obtain the environment-friendly high-performance concrete.
The following are specific examples to illustrate the technical solutions of the present application.
First embodiment
The green environment-friendly high-performance concrete provided by the first embodiment of the application comprises the following raw materials in parts by weight:
100 parts of cement;
20 parts of waste concrete;
10 parts of fly ash;
10 parts of lightweight fine aggregate;
5 parts of ceramsite;
5 parts of modified straw powder;
1 part of carbon fiber;
1 part of vitrified micro bubbles;
5 parts of a water reducing agent;
100 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate has a bulk density of 12.5kg/m3The polyphenylene particle of (4). The lightweight fine aggregate was purchased from Hainan Jordan Lihong foam Co.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
1400g of polyacrylic acid fiber and 20L of deionized water are added into a three-neck flask together, stirred for 0.5h at 45 ℃, and then 4000g of straw powder and 50mL of 5 multiplied by 10 are sequentially added-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
Second embodiment
According to the green environment-friendly high-performance concrete provided by the second embodiment of the application, the raw materials for preparing the green environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
50 parts of waste concrete;
40 parts of fly ash;
35 parts of lightweight fine aggregate;
30 parts of ceramsite;
20 parts of modified straw powder;
5 parts of carbon fiber;
15 parts of vitrified micro bubbles;
10 parts of a water reducing agent;
400 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate is polyphenyl granules with the bulk density of 12.5kg/m 3. The lightweight fine aggregate was purchased from Hainan Jordan Lihong foam Co.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
1400g of polyacrylic acid fiber and 20L of deionized water are added into a three-neck flask together, stirred for 0.5h at 45 ℃, and then 4000g of straw powder and 50mL of 5 multiplied by 10 are sequentially added-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
Third embodiment
The green environment-friendly high-performance concrete provided by the third embodiment of the application comprises the following raw materials in parts by weight:
100 parts of cement;
25 parts of waste concrete;
15 parts of fly ash;
20 parts of lightweight fine aggregate;
15 parts of ceramsite;
8 parts of modified straw powder;
1 part of carbon fiber;
6 parts of vitrified micro bubbles;
8 parts of a water reducing agent;
200 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate is polyphenyl granules with the bulk density of 12.5kg/m 3. The lightweight fine aggregate was purchased from Hainan Jordan Lihong foam Co.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
Adding 1000g polyacrylic acid fiber and 20L deionized water into a three-neck flask, stirring at 45 deg.C for 0.5h, and sequentially adding 2000g strawStraw powder and 50mL of 5X 10-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
Fourth embodiment
The green environment-friendly high-performance concrete provided by the fourth embodiment of the application comprises the following raw materials in parts by weight:
100 parts of cement;
40 parts of waste concrete;
35 parts of fly ash;
30 parts of lightweight fine aggregate;
25 parts of ceramsite;
16 parts of modified straw powder;
3 parts of carbon fiber;
12 parts of vitrified micro bubbles;
8 parts of a water reducing agent;
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate is polyphenyl granules with the bulk density of 12.5kg/m 3. The lightweight fine aggregate was purchased from Hainan Jordan Lihong foam Co.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
1600g of polyacrylic acid fiber and 20L of deionized water are added into a three-neck flask together, stirred for 0.5h at the temperature of 45 ℃, and then 4000g of straw powder and 50mL of 5 multiplied by 10 are sequentially added-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
Fifth embodiment
The green environment-friendly high-performance concrete provided by the fifth embodiment of the application comprises the following raw materials in parts by weight:
100 parts of cement;
30 parts of waste concrete;
28 parts of fly ash;
25 parts of lightweight fine aggregate;
20 parts of ceramsite;
12 parts of modified straw powder;
3 parts of carbon fiber;
10 parts of vitrified micro bubbles;
5 parts of a water reducing agent;
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate has a bulk density of 12.5kg/m3The polyphenylene particle of (4). The lightweight fine aggregate was purchased from Hainan Jordan Lihong foam Co.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
1000g of polyacrylic acid fiber and 20L of deionized water are added into a three-neck flask together, stirred for 0.5h at 45 ℃, and then 4000g of straw powder and 50mL of 5 multiplied by 10 are sequentially added-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
Sixth embodiment
The green environment-friendly high-performance concrete provided by the sixth embodiment of the application comprises the following raw materials in parts by weight:
100 parts of cement;
30 parts of waste concrete;
28 parts of fly ash;
25 parts of lightweight fine aggregate;
20 parts of ceramsite;
12 parts of modified straw powder;
3 parts of carbon fiber;
10 parts of vitrified micro bubbles;
5 parts of a water reducing agent;
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
The cement is sulphoaluminate cement;
the waste concrete is pretreated, and the pretreatment comprises the following steps:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
The fly ash is ultrafine fly ash, and the average particle size is less than 5 mu m;
pretreating the fly ash: fly ash is put into a ball mill to be ground until the average grain diameter is less than 5 μm, and the fly ash is used in the embodiment of the invention. The fly ash is purchased from Jinyin Xinyuan fly ash Co., Ltd, in Jinan;
the lightweight fine aggregate is polyphenyl granules with the bulk density of 12.5kg/m3 of the modified lightweight fine aggregate. The polyphenyl particles were purchased from Hainan Jordan Lihong foam Co.
The lightweight fine aggregate is subjected to modification treatment, and the modification treatment comprises the following steps:
adding the mixture of the lightweight fine aggregate and the maleic anhydride into a double-screw extruder together, adding an initiator with the mass of 1% of the mixture after the mixture is melted, wherein the initiator is a styrene solution containing dicumyl peroxide, the mass concentration of the dicumyl peroxide is 5%, stirring and reacting for 2 hours in a melting state, and drying and crushing the mixture for later use after the mixture is extruded out by the double-screw extruder.
The ceramsite is shale ceramsite. The ceramsite is purchased from Yichang Baozhu ceramsite Co.
The modified straw powder is polyacrylic acid fiber modified straw powder.
1000g of polyacrylic acid fiber and 20L of deionized water are added into a three-neck flask together, stirred for 0.5h at 45 ℃, and then 4000g of straw powder and 50mL of 5 multiplied by 10 are sequentially added-3The concentration of hydrogen ions in the mixed solution is adjusted to 6 multiplied by 10 by mol/L ceric ammonium nitrate solution-2And (3) mol/L, stirring and reacting for 5 hours in a constant-temperature water bath at 45 ℃, and washing, filtering and drying to obtain polyacrylic fiber modified straw powder. The straw powder is corn straw powder.
The carbon fiber is a nano carbon fiber. The carbon nanofibers are available from the Ishikaki technologies, Inc., Beijing Germany.
The vitrified micro bubbles are purchased from Xinyang Ming Dai mineral products Co.
The water reducing agent is a polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is purchased from Guangdong red wall new material GmbH.
The water is tap water.
The preparation method of the green environment-friendly high-performance concrete comprises the following steps:
and sequentially adding the cement, the waste concrete, the fly ash, the light fine aggregate, the ceramsite, the modified straw powder, the carbon fiber, the vitrified micro bubbles, the water reducing agent and the water into a stirrer in parts by weight, and uniformly stirring to obtain the environment-friendly high-performance concrete.
First comparative example:
the specific steps of the first comparative example are different from the fifth embodiment in that modified straw powder is not included.
Second comparative example:
the second comparative example is similar to the fifth embodiment, but differs from the fifth embodiment in that the modified straw powder is not modified, but only corn straw.
Third comparative example:
the third comparative example is similar to the fifth example in the specific steps, but the polyacrylic acid fiber in the modified straw powder is changed into polycarbonate-based fiber.
Fourth comparative example:
the fourth comparative example is the same as the fifth example in specific steps, but is different from the fifth example in that the weight ratio of the polyacrylic acid fibers to the corn stalks in the modified straw powder is changed to 1: 1.
fifth comparative example:
the concrete procedure of the fifth comparative example is different from that of the fifth example in that the concrete of the fifth comparative example is not pretreated.
Sixth comparative example:
the sixth comparative example is different from the fifth example in that an acetic acid solution having a concentration of 10% is used in the concrete pretreatment.
Seventh comparative example:
the seventh comparative example is similar to the fifth example in the specific steps, but different from the fifth example in that an acetic acid solution with a concentration of 3% is used for 3 hours in the concrete pretreatment process.
Eighth comparative example:
the eighth comparative example is different from the fifth example in the point that the acetic acid solution is changed to the hydrochloric acid solution during the concrete pretreatment.
The performance test method comprises the following steps:
the above examples and comparative examples were prepared into a cubic test piece of 200mm × 200mm × 600mm, and the test piece was placed in a curing room, and subjected to standard curing for 28d at 25 ℃ and a relative humidity of more than 98%, and the following tests were performed:
1. and respectively testing the compressive strength and the flexural strength of the concrete for 28d according to GB/T50081-2002 standard of common concrete mechanical property test methods.
2. Freezing resistance
The frost resistance grades are respectively tested according to the frost resistance test method in GB/T50082-2009 test method standards for the long-term performance and the durability of the common concrete.
3. Flame retardant properties
The flame retardant performance of the various examples and comparative examples were tested according to GB 8624-2012.
The specific data are shown in the table 1 product performance evaluation table.
Table 1 evaluation table of product properties
According to the embodiment and the proportion, the technical scheme of the application has better compressive strength, breaking strength, frost resistance and flame resistance. And in the technical scheme, waste concrete is used, so that waste utilization is achieved, and the energy conservation and environmental protection are in accordance with the national green and environmental protection concept.
In addition, when the density of the lightweight structural concrete is measured by the density measurement (ASTM C567-2005) of the lightweight structural concrete in examples 1 to 6 of the present application, the density of the products of examples 1 to 6 is less than 240kg/m3。
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The environment-friendly high-performance concrete is characterized in that the raw materials for preparing the environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
20-50 parts of waste concrete;
10-40 parts of fly ash;
10-35 parts of light fine aggregate;
5-30 parts of ceramsite;
5-20 parts of modified straw powder;
1-5 parts of carbon fiber;
1-15 parts of vitrified micro bubbles;
5-10 parts of a water reducing agent; and
100 portions of water and 400 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
2. The environment-friendly high-performance concrete according to claim 1, wherein the raw materials for preparing the environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
25-40 parts of waste concrete;
15-35 parts of fly ash;
20-30 parts of light fine aggregate;
15-25 parts of ceramsite;
8-16 parts of modified straw powder;
1-3 parts of carbon fiber;
6-12 parts of vitrified micro bubbles;
3-8 parts of a water reducing agent; and
200 portions of water and 300 portions of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
3. The environment-friendly high-performance concrete according to claim 2, wherein the raw materials for preparing the environment-friendly high-performance concrete comprise the following components in parts by weight:
100 parts of cement;
30 parts of waste concrete;
28 parts of fly ash;
25 parts of lightweight fine aggregate;
20 parts of ceramsite;
12 parts of modified straw powder;
3 parts of carbon fiber;
10 parts of vitrified micro bubbles;
5 parts of a water reducing agent; and
300 parts of water;
the modified straw powder is polyacrylic acid fiber modified straw powder.
4. The green environmental protection high performance concrete according to claim 1, wherein the waste concrete is pretreated by the steps of:
crushing, namely crushing the waste concrete to ensure that the particle size of the waste concrete is not more than 10 mm;
activating, namely putting the crushed waste concrete into an acetic acid solution with the concentration of 3%, and stirring for 0.5h at room temperature;
and drying, namely drying and drying the activated waste concrete for later use.
5. The green environmental-friendly high-performance concrete according to claim 1, wherein the lightweight fine aggregate has a density of 5 to 20kg/m3The polyphenylene particle of (4).
6. The green environment-friendly high-performance concrete according to claim 1, wherein the weight ratio of the polyacrylic acid fiber to the straw powder in the modified straw powder is (5-10): 20.
7. the green environmental-friendly high-performance concrete according to claim 1, wherein in the modified straw powder, the straw powder is selected from the group consisting of: any one or combination of more of wheat straw, corn straw, rice straw, sugarcane straw and cotton straw.
8. The green environmental-friendly high-performance concrete according to claim 1, wherein the carbon fibers are carbon nanofibers.
9. The green environment-friendly high-performance concrete according to claim 1, wherein the water reducing agent is selected from any one or a combination of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate water reducing agent.
10. The method for preparing green environmental protection high performance concrete according to any one of claims 1 to 9, comprising the steps of:
sequentially adding cement, waste concrete, fly ash, lightweight fine aggregate, ceramsite, modified straw powder, carbon fiber, vitrified micro bubbles, water reducer and water into a stirrer, and uniformly stirring to obtain the environment-friendly high-performance concrete.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624691A (en) * | 2020-12-18 | 2021-04-09 | 马鞍山市国林建材有限公司 | Production method of high-efficiency low-emission silent crushing agent for producing Z-shaped concrete hollow blocks |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090071378A1 (en) * | 2005-04-18 | 2009-03-19 | Denki Kagaku Kogyo Kabushiki Kaisha | Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives |
| CN104193285A (en) * | 2014-08-27 | 2014-12-10 | 安徽锦洋氟化学有限公司 | High-performance modified fluorogypsum |
| CN109354454A (en) * | 2018-12-05 | 2019-02-19 | 四川省三台县波特兰商品砼有限公司 | A kind of lightweight straw concrete wall material and preparation method thereof |
| CN110105002A (en) * | 2019-05-24 | 2019-08-09 | 宿州海龙建筑科技有限公司 | A kind of stalk clinker environment friendly lightweight concrete and preparation method thereof |
-
2020
- 2020-07-28 CN CN202010740915.1A patent/CN111848044A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090071378A1 (en) * | 2005-04-18 | 2009-03-19 | Denki Kagaku Kogyo Kabushiki Kaisha | Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives |
| CN104193285A (en) * | 2014-08-27 | 2014-12-10 | 安徽锦洋氟化学有限公司 | High-performance modified fluorogypsum |
| CN109354454A (en) * | 2018-12-05 | 2019-02-19 | 四川省三台县波特兰商品砼有限公司 | A kind of lightweight straw concrete wall material and preparation method thereof |
| CN110105002A (en) * | 2019-05-24 | 2019-08-09 | 宿州海龙建筑科技有限公司 | A kind of stalk clinker environment friendly lightweight concrete and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 彭红等: "《建筑材料》", 31 January 2018, 重庆大学出版社 * |
| 李祖德: "《塑料加工技术应用手册》", 31 October 1997, 中国物资出版社 * |
| 王国建等: "《功能高分子》", 31 January 2010, 同济大学出版社 * |
| 王文广: "《"十三五"普通高等教育本科规划教材-聚合物改性原理》", 31 March 2018, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624691A (en) * | 2020-12-18 | 2021-04-09 | 马鞍山市国林建材有限公司 | Production method of high-efficiency low-emission silent crushing agent for producing Z-shaped concrete hollow blocks |
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Application publication date: 20201030 |