JP2851514B2 - Artificial molded aggregate for concrete - Google Patents
Artificial molded aggregate for concreteInfo
- Publication number
- JP2851514B2 JP2851514B2 JP5158002A JP15800293A JP2851514B2 JP 2851514 B2 JP2851514 B2 JP 2851514B2 JP 5158002 A JP5158002 A JP 5158002A JP 15800293 A JP15800293 A JP 15800293A JP 2851514 B2 JP2851514 B2 JP 2851514B2
- Authority
- JP
- Japan
- Prior art keywords
- shape
- concrete
- aggregate
- cross
- artificially formed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004567 concrete Substances 0.000 title claims description 73
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000000047 product Substances 0.000 description 15
- 239000011384 asphalt concrete Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 13
- 239000004568 cement Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004566 building material Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000004323 axial length Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000011041 water permeability test Methods 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
- 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
- C04B20/0008—Materials specified by a shape not covered by C04B20/0016 - C04B20/0056, e.g. nanotubes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Nanotechnology (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Description
【０００１】[0001]
【技術分野】本発明は、アスファルトやセメント等と混
合して、道路舗装材料や建設材料等に使用されるコンク
リート用人工成形骨材に係り、特に透水舗装や吸音舗装
用、更には吸音、防音、断熱建材用のコンクリート用骨
材として好適に用いられ得る人工成形骨材に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificially formed aggregate for concrete used as a road pavement material or a construction material when mixed with asphalt, cement, or the like, particularly for a water-permeable pavement or a sound-absorbing pavement, and furthermore, for sound absorption and sound insulation. The present invention relates to an artificially formed aggregate that can be suitably used as a concrete aggregate for a heat insulating building material.
【０００２】[0002]
【背景技術】従来から、道路舗装用若しくは建設用のコ
ンクリート用骨材には、一般に、天然に採取され、比較
的安価な砕石が使用されてきている。しかしながら、天
然砕石は、その採取量に限りがあり、また所望の粒度分
布のものを多量に得ることが難しい。それ故、そのよう
な天然砕石を用いたコンクリート用骨材においては、品
質の安定したものを大量に得ることが極めて困難なので
ある。BACKGROUND ART Conventionally, as aggregate for concrete for road pavement or construction, crushed stone, which is naturally collected and relatively inexpensive, has been used. However, the amount of natural crushed stone is limited, and it is difficult to obtain a large amount of natural crushed stone having a desired particle size distribution. Therefore, it is extremely difficult to obtain a large amount of concrete with stable quality in such concrete aggregates using natural crushed stone.
【０００３】しかも、かかる天然砕石は、原料石材の層
状節理のために、一般的に、偏平度の高い不均一な薄板
形状を有している。そのため、そのような天然砕石を骨
材として用いて得られるアスファルトコンクリートやセ
メントコンクリートにあっては、構造が緻密化せしめら
れて、その表面や内部に存在する空隙が少なく、またそ
れらの空隙の中でも、特に、表面から内部に連続して延
び、コンクリートの内部と外部とを連通せしめるような
空隙が非常に少ないのである。従って、天然砕石を骨材
として含むコンクリートは、必然的に、透水性や吸音
性、断熱性等が低いものとなってしまい、透水舗装や吸
音舗装、或いは吸音断熱建材や断熱建材等に用いられて
も、その目的が十分に達成され得るものではなかった。Moreover, such natural crushed stone generally has a non-uniform thin plate shape having a high degree of flatness due to a layered joint of a raw material stone. Therefore, in asphalt concrete and cement concrete obtained using such natural crushed stone as aggregate, the structure is densified, there are few voids present on the surface and inside, and also among those voids In particular, there are very few voids that extend continuously from the surface to the interior and allow the interior and exterior of the concrete to communicate. Accordingly, concrete containing natural crushed stone as an aggregate necessarily has low water permeability, sound absorption, heat insulation, and the like, and is used for water-permeable pavement, sound-absorbing pavement, sound-absorbing heat-insulating building materials, heat-insulating building materials, and the like. However, the objective was not fully achieved.
【０００４】また、そのようなコンクリートにあって
は、内部構造が緻密化されるものの、骨材として含まれ
る天然砕石が不均一な形状を有し、更には機械的強度に
も劣るものであるところから、その安定性が低くなって
しまうことが避けられなかったのである。[0004] Further, in such concrete, although the internal structure is densified, natural crushed stone contained as aggregate has an uneven shape and further has poor mechanical strength. However, the stability was inevitably reduced.
【０００５】一方、最近では、所定の原料混合物を成形
した後、これを焼成して、焼成物を得、更にこの得られ
た焼成物を粉砕して、人工合成砕石と為し、そしてそれ
を各種用途の骨材に利用することが行なわれている。こ
のような人工合成砕石は、安定的に大量生産され得、し
かも天然砕石に比して機械的強度や耐摩耗性に優れるも
のであることから、特に摩耗の激しい道路の表層部等に
対して有利に用いられている。On the other hand, recently, after a predetermined raw material mixture has been formed, it is fired to obtain a fired material, and the obtained fired material is further crushed into artificial synthetic crushed stone. It is used for aggregates for various purposes. Such artificial crushed stones can be stably mass-produced and have excellent mechanical strength and abrasion resistance as compared with natural crushed stones. It is used advantageously.
【０００６】しかしながら、かかる人工合成砕石にあっ
ては、所望の粒度分布を得るべく、粉砕による整粒操作
が施されてなるものであるため、個々の形状が極めて不
均一なものなのである。それ故、そのような人工合成砕
石を骨材として用いて得られるアスファルトコンクリー
トやセメントコンクリートにあっても、天然砕石と同様
に、表面から内部に連続して延びる空隙を十分に確保す
ることが困難であったのであり、またその安定性におい
て、未だ十分に満足し得るものとは言い難いものであっ
た。However, in such artificial synthetic crushed stones, since a sizing operation by pulverization is performed to obtain a desired particle size distribution, the individual shapes are extremely non-uniform. Therefore, even in asphalt concrete or cement concrete obtained by using such artificial synthetic crushed stone as aggregate, it is difficult to sufficiently secure voids extending continuously from the surface to the inside similarly to natural crushed stone. In terms of stability, it was hardly satisfactory.
【０００７】要するに、かくの如き人工合成砕石にあっ
ても、透水性や吸音性、断熱性等に優れたアスファルト
コンクリートやセメントコンクリート等のコンクリート
用骨材としては、十分にその要求に応えるものではなか
ったのである。[0007] In short, even such artificial synthetic crushed stone does not sufficiently meet the demand as a concrete aggregate such as asphalt concrete or cement concrete which is excellent in water permeability, sound absorption, heat insulation and the like. There was no.
【０００８】[0008]
【解決課題】ここにおいて、本発明は、かかる事情を背
景にして為されたものであって、その解決課題とすると
ころは、アスファルトやセメントと混用することによっ
て、安定性に優れると共に、表面から内部に連続して延
びる空隙の空隙率の大きいコンクリートを形成し得、以
て透水舗装や吸音舗装、更には吸音、防音、断熱建材等
に使用されるアスファルトコンクリートやセメントコン
クリート等に好適に用いられ得るコンクリート用人工成
形骨材を提供することにある。Here, the present invention has been made in view of such circumstances, and the problem to be solved is to mix with asphalt and cement to provide excellent stability and to improve surface stability. It is possible to form concrete with a large porosity of voids extending continuously inside, and it is suitably used for asphalt concrete and cement concrete used for water-permeable pavement and sound-absorbing pavement, and furthermore, for sound absorption, soundproofing, and heat-insulating building materials. An object of the present invention is to provide an obtained artificially formed aggregate for concrete.
【０００９】[0009]
【解決手段】そして、本発明者らは、かかる課題を解決
するべく鋭意研究を重ねた結果、多数の骨材にて構成さ
れる集合体において、骨材間に、連続する空隙を容易に
形成し得、しかもそれら骨材間の結合性をも高めること
の出来る、骨材の粒子形状を見い出したのである。The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, in an aggregate composed of a large number of aggregates, continuous voids are easily formed between the aggregates. They have found an aggregate particle shape that can be used and that can also enhance the bonding between the aggregates.
【００１０】すなわち、本発明は、かかる知見に基づい
て完成されたものであり、その特徴とするところは、柱
状のセラミック成形体の焼成物であって、その横断面
が、（ア）多角形形状、（イ）多角形の各辺部が凸状に
膨出せしめられてなる形状、（ウ）多角形の各辺部が凹
状に凹陥せしめられてなる形状、（エ）並びにそれら各
形状の角部がそれぞれ円弧状とされた形状のうち、何れ
かの形状を有するコンクリート用人工成形骨材にある。That is, the present invention has been completed on the basis of this finding, and is characterized by a fired product of a columnar ceramic molded body, the cross section of which is (a) a polygon. (A) a shape in which each side of the polygon is bulged convexly; (c) a shape in which each side of the polygon is dented in a concave shape; The present invention is an artificially formed concrete aggregate having any one of the arc-shaped corners.
【００１１】また、かかる本発明にあっては、有利に
は、前記横断面形状における角部部分が、それぞれ、外
方に膨出した膨大部とされることとなる。In the present invention, the corner portions in the cross-sectional shape are each advantageously formed as a bulged portion that bulges outward.
【００１２】[0012]
【具体的構成】ところで、このような本発明に従うコン
クリート用人工成形骨材は、セラミック成形体の焼成物
からなるものであるが、そのような人工成形骨材を構成
するセラミックス材料は、如何なる材質のものであって
も良く、例えば高アルミナ質、ムライト質、シャモット
質、高珪素質、高カルシアのウォルステナイト質等のセ
ラミックス材料が何れも採用され得るのである。また、
その中でも、特に、機械的強度及び耐摩耗性に優れる高
アルミナ質やムライト質等のものが、コンクリートの安
定性を高める上において、好適に採用されることとな
る。The artificially formed aggregate for concrete according to the present invention comprises a fired product of a ceramic molded body. The ceramic material constituting such an artificially formed aggregate is made of any material. Any of ceramic materials such as high alumina, mullite, chamotte, high silicon, and high calcia walsteinite may be used. Also,
Among them, in particular, those having high alumina, mullite, etc., which are excellent in mechanical strength and abrasion resistance, are suitably employed for enhancing the stability of concrete.
【００１３】そして、特に、本発明に係るコンクリート
用人工成形骨材は、従来の天然砕石や人工合成砕石等か
らなる骨材には見られない特徴的な形状を有するもので
あって、前述したように、全体として柱状形状を呈し、
且つその横断面が、（ア）〜（エ）の如き形状を有して
なるものなのである。In particular, the artificially formed aggregate for concrete according to the present invention has a characteristic shape which cannot be seen in aggregates made of conventional natural crushed stone, artificially synthesized crushed stone, and the like. As a whole, it has a columnar shape,
Further, the cross section has a shape as shown in (a) to (d).
【００１４】具体的には、全体として柱状の形状を呈
し、且つ横断面が（ア）多角形形状を有する人工成形骨
材として、例えば図１の（ａ）〜（ｃ）に示される如き
形状のもの等が挙げられる。即ち、各横断面１０が、そ
れぞれ、三角形、四角形、五角形とされ、全体として、
三角柱形状、四角柱形状、五角柱形状を呈するもの等で
ある。なお、かかる図１においては、その形状の認識を
容易とするために、三角形、四角形及び五角形の横断面
形状を有してなる人工成形骨材のみを例示し、また、後
述する図２〜図６においても、同様な理由から、横断面
が、三角形、四角形、五角形の何れかの変形形状を有す
る骨材を示すに止めた。従って、本発明に従うコンクリ
ート用人工成形骨材にあっては、その形状が、それら図
１〜図６に示されるものに限定されるものでは決してな
く、横断面が、その他の多角形形状若しくはその他の多
角形の変形形状を有してなるものであっても、何等差し
支えないことが理解されるべきである。More specifically, as an artificially formed aggregate having a columnar shape as a whole and having (a) a polygonal cross section, for example, a shape as shown in FIGS. And the like. That is, each cross section 10 is a triangle, a quadrangle, and a pentagon, respectively.
Those exhibiting a triangular prism shape, a quadrangular prism shape, a pentagonal prism shape, and the like. In FIG. 1, in order to facilitate recognition of the shape, only artificially formed aggregates having triangular, quadrangular and pentagonal cross-sectional shapes are illustrated, and FIGS. For the same reason, only the aggregate having a cross-sectional shape of any one of a triangle, a quadrangle, and a pentagon was shown in FIG. Therefore, in the artificially formed aggregate for concrete according to the present invention, the shape is by no means limited to those shown in FIGS. 1 to 6, and the cross section is other polygonal shape or other. It is to be understood that even the one having the polygonal deformed shape described above does not matter at all.
【００１５】また、全体形状が柱状を呈し、且つ横断面
が（イ）多角形の各辺部が凸状に膨出せしめられた形状
を有してなるコンクリート用人工成形骨材としては、図
２の（ａ）〜（ｃ）に示される如き形状のものが例示さ
れ得る。即ち、それらの図に示される人工成形骨材は、
何れも、各側面１２が外方に向かって凸状に湾曲せしめ
られ、全体としてビアダル型形状を呈しており、各横断
面１０が、それぞれ、多角形が膨張して変形せしめられ
た形状とされているのである。An artificially formed aggregate for concrete having a columnar overall shape and (a) each side of a polygon having a convexly bulging shape is shown in FIG. Shapes as shown in FIGS. 2 (a) to (c) can be exemplified. That is, the artificially formed aggregate shown in those figures is
In each case, each side surface 12 is curved in a convex shape outward and has a viadal shape as a whole, and each cross section 10 has a shape in which a polygon is expanded and deformed. -ing
【００１６】さらに、全体形状が柱状を呈し、且つ横断
面が（ウ）多角形の各辺部が凹状に陥没せしめられた形
状を有してなるコンクリート用人工成形骨材としては、
図３及び図４の（ａ）〜（ｃ）に示される如き形状のも
のが例示され得る。即ち、図３に示される人工成形骨材
は、何れも、全体として柱状の形状を呈する一方、各側
面１２が凹状に屈曲せしめられて、各横断面１０が星型
形状とされているのであり、また、図４に示される人工
成形骨材は、何れも、全体として柱状の形状を呈する一
方、各側面１２が凹状に湾曲せしめられて、各横断面１
０が溝付型形状とされているのである。なお、そのよう
な形状とされた人工成形骨材にあっては、その機械的強
度等を考慮した上で、各側面１２の屈曲乃至は湾曲によ
り形成される凹所の位置や深さ等が適宜に設定されるこ
ととなる。Further, as an artificially formed aggregate for concrete having a columnar overall shape and a shape in which each side of a polygonal cross section is depressed into a concave shape,
Shapes as shown in FIGS. 3 and 4A to 4C can be exemplified. That is, the artificially formed aggregate shown in FIG. 3 has a columnar shape as a whole, while each side surface 12 is bent in a concave shape, and each cross section 10 has a star shape. Further, the artificially formed aggregate shown in FIG. 4 has a columnar shape as a whole, while each side surface 12 is curved in a concave shape, and each cross section 1
0 is a grooved shape. In the artificially formed aggregate having such a shape, the position and depth of the concave portion formed by bending or bending each side surface 12 are determined in consideration of the mechanical strength and the like. It will be set appropriately.
【００１７】更にまた、全体形状が柱状を呈し、且つ横
断面が（エ）前記（ア）〜（ウ）の如き形状の角部がそ
れぞれ円弧状とされた形状を有してなるコンクリート用
人工成形骨材としては、図５の（ａ）〜（ｄ）に示され
る如き形状のものが例示され得る。即ち、それらの図に
示される人工成形骨材は、図１〜図４の（ｃ）にそれぞ
れ示される人工成形骨材において、互いに隣合う側面１
２，１２よりなる各角部１４が、面取り状態とされて、
曲面をなした形状を呈しているのである。なお、そのよ
うなコンクリート用人工成形骨材にあっては、互いに隣
合う側面よりなる角部だけでなく、上底面と各側面より
なる角部や下底面と各側面よりなる角部も面取り状態と
されて、全べての角部が湾曲面とされていても良く、そ
れによって、機械的衝撃等による損傷が、より有効に回
避され得ることとなる。Furthermore, an artificial concrete for concrete having an overall shape of a column and a cross section having a shape in which (d) the corners of the shapes (a) to (c) are arc-shaped respectively. Examples of the shaped aggregate include those having shapes as shown in FIGS. 5 (a) to 5 (d). That is, the artificially formed aggregates shown in those figures are different from the artificially formed aggregates shown in FIGS.
Each corner 14 consisting of 2, 12 is chamfered,
It has a curved shape. In such artificially formed aggregate for concrete, not only the corners composed of the side surfaces adjacent to each other but also the corners composed of the upper bottom surface and the respective side surfaces and the corners composed of the lower bottom surface and the respective side surfaces are chamfered. Thus, all corners may be curved surfaces, so that damage due to mechanical shock or the like can be more effectively avoided.
【００１８】また、本発明に従って上述の如き形状とさ
れたコンクリート用人工成形骨材にあっては、有利に
は、図１〜図４に示される如き形状のものにおいて、各
横断面形状における角部部分が、それぞれ外方に膨出し
た膨大部とされることとなる。即ち、例えば図６に示さ
れているように、図１〜図４の（ｃ）に示される人工成
形骨材において、前記各角部１４が、該骨材の高さ方向
に亘って連続して、断面円弧状乃至は円形に膨出せしめ
られ、それにより膨大部１６が形成されるのである。な
お、かかる膨大部１６は、機械的強度等が考慮されたも
のであれば、如何なる形状であっても差し支えない。Further, in the artificially formed aggregate for concrete shaped as described above according to the present invention, it is advantageous to use the shape as shown in FIGS. The respective portions are bulged outwardly. That is, as shown in FIG. 6, for example, in the artificially formed aggregate shown in FIGS. 1 to 4C, the corners 14 are continuous in the height direction of the aggregate. As a result, the cross-section is bulged in an arc shape or a circular shape, thereby forming the enlarged portion 16. The expanded portion 16 may have any shape as long as mechanical strength and the like are taken into consideration.
【００１９】ここにおいて、かくの如きコンクリート用
人工成形骨材にあっては、使用形態に応じて、その大き
さが適宜に設定されるが、一般に、扱い易さ等の点か
ら、軸方向長さが３〜２０mm程度とされ、また横断面の
大きさが、偏平率等を考慮した上で決定されることとな
る。即ち、かかる人工成形骨材においては、通常、各種
の形状を有する横断面が、何れも、円に略内接する形状
とされていることから、そのような横断面の外接円の直
径：Ｄが、軸方向長さ：Ｌに応じて、また逆に軸方向長
さ：Ｌが、横断面の外接円の直径：Ｄに応じて、それぞ
れ、適宜に設定されるのである。そして、特に、本発明
に係るコンクリート用人工成形骨材にあっては、横断面
の外接円の直径：Ｄと、軸方向長さ：Ｌとが、次式：
０．２＜Ｌ／Ｄ＜５を満たすような寸法とされているこ
とが望ましく、またそれらが、０．３＜Ｌ／Ｄ＜３の範
囲をとるようにされることがより望ましいのである。け
だし、Ｌ／Ｄの値が０．２以下であるコンクリート用人
工成形骨材においては、その偏平率が高くなってしま
い、コンクリートの空隙率、特に表面から内部に連続し
て延びる空隙の空隙率の効果的な向上が望めなくなるか
らであり、またＬ／Ｄの値が５以上である骨材にあって
は、流動性が悪化してしまうからである。Here, the size of the artificially formed aggregate for concrete as described above is appropriately set according to the use form. However, in general, the length in the axial direction is considered from the viewpoint of ease of handling and the like. Is set to about 3 to 20 mm, and the size of the cross section is determined in consideration of the flattening rate and the like. That is, in such artificially formed aggregates, the cross-sections having various shapes are generally in a shape substantially inscribed in a circle. Therefore, the diameter D of the circumscribed circle of such a cross-section is D. The axial length L is appropriately set according to the axial length L, and conversely, the axial length L according to the diameter D of the circumscribed circle of the cross section. In particular, in the artificially formed aggregate for concrete according to the present invention, the diameter of the circumscribed circle of the cross section: D and the axial length: L are represented by the following formula:
It is desirable that the dimensions be such that 0.2 <L / D <5, and it is even more desirable that they be in the range of 0.3 <L / D <3. In the artificially formed aggregate for concrete having an L / D value of 0.2 or less, the flattening rate is increased, and the porosity of the concrete, particularly the porosity of the void continuously extending from the surface to the inside, is increased. This is because it is not possible to expect an effective improvement of the above, and in the case of an aggregate having an L / D value of 5 or more, the fluidity is deteriorated.
【００２０】このように、本発明に係るコンクリート用
人工成形骨材は、一様に、柱状を呈するものであるとこ
ろから、偏平率の高い、薄板状を呈する天然砕石とは異
なり、コンクリートが必要以上に緻密化してしまうよう
なことを有利に回避せしめ得て、それによりコンクリー
トの空隙の量を増加せしめ、しかも、その中でも特に、
表面から内部に連続して延びる空隙の量を飛躍的に増加
せしめ得るのである。As described above, since the artificially formed aggregate for concrete according to the present invention has a uniform columnar shape, unlike the natural crushed stone having a high flatness and a thin plate shape, concrete is required. It is possible to advantageously avoid such densification, thereby increasing the amount of concrete voids, and among them,
The amount of the void continuously extending from the surface to the inside can be drastically increased.
【００２１】また、かかるコンクリート用人工成形骨材
にあっては、その横断面が、多角形形状若しくは前記の
如き多角形の変形形状を有するものであることから、骨
材同士が、角部等の突出部と、平面状若しくは凹状に陥
没せしめられた側面等とにおいて、良好に嵌合乃至は結
合され得、以て安定な構造を有する骨材の集合体が形成
され得るのである。Further, in the artificially formed aggregate for concrete, since the cross section has a polygonal shape or a polygonal deformed shape as described above, the aggregates are formed at corners or the like. Can be satisfactorily fitted or connected to the projections and the side surfaces or the like depressed in a flat or concave shape, whereby an aggregate of aggregate having a stable structure can be formed.
【００２２】従って、そのようなコンクリート用人工成
形骨材を用いて構成されるコンクリートは、高い安定性
と優れた透水性、吸音性、防音性、更には断熱性を発揮
することとなるのであり、それ故にかかるコンクリート
用人工成形骨材にあっては、透水舗装や吸音舗装、更に
は吸音、防音、断熱建材等に使用されるアスファルトコ
ンクリートやセメントコンクリート等の骨材として、極
めて良好に用いられ得ることとなるのである。Accordingly, concrete constituted by using such artificially formed aggregate for concrete exhibits high stability and excellent water permeability, sound absorption, sound insulation and heat insulation. Therefore, such artificially formed aggregates for concrete are extremely well used as aggregates such as asphalt concrete and cement concrete used for water-permeable pavement and sound-absorbing pavement, as well as sound-absorbing, soundproofing and heat-insulating building materials. You get it.
【００２３】また、特に、横断面形状における角部部分
にそれぞれ外方に膨出した膨大部が設けられてなるコン
クリート用人工成形骨材にあっては、かかる膨大部の存
在により、コンクリート中への埋没効果が著しく高めら
れ得ることから、アスファルトコンクリートやセメント
コンクリート中に部分的に混在させるだけで、それらの
コンクリートの構造強度を増加させる一方、その流動性
を減少せしめ得、以てそのようなコンクリートからなる
最終製品の耐久性等を有利に向上せしめ得るのである。In particular, in the artificially formed aggregate for concrete in which the bulges bulging outward are provided at the corners in the cross-sectional shape, the presence of the bulges causes the concrete to enter into the concrete. Since the burial effect of the concrete can be significantly enhanced, only by partially mixing it in asphalt concrete or cement concrete, it is possible to increase the structural strength of those concretes, while reducing their fluidity, and The durability and the like of the final product made of concrete can be advantageously improved.
【００２４】ところで、上述の如き特徴的な形状を有
し、且つそれによって極めて優れた効果を奏し得るコン
クリート用人工成形骨材は、例えば、以下の如くして得
られることとなる。By the way, an artificially formed aggregate for concrete having the characteristic shape as described above and exhibiting an extremely excellent effect can be obtained, for example, as follows.
【００２５】すなわち、先ず、各種のセラミックス原料
を所定量準備する。なお、そこにおいて準備されるセラ
ミックス原料は、各種のものが何れも採用され得る。即
ち、例えばＡｌ2 Ｏ3 原料としては、市販のアルミナク
リンカー、バイヤー法により製造される水酸化アルミニ
ウム並びにそれを加熱処理して得られる酸化アルミニウ
ム、天然ボーキサイト及びその焼成物等が挙げられるの
であり、またＳｉＯ2原料としては、シリカ成分を有す
る珪素、珪砂、及びシリカ・アルミナ成分を有するカオ
リン、バン土頁岩、シャモット粘土等が使用され得るの
である。更に、ＭｇＯ原料としては、市販のマグネシア
や水酸化マグネシウム、軽焼マグネシア、天然マグネサ
イト等が挙げられ、更にまたＣａＯ原料としては、カル
シアや水酸化カルシウム、炭酸カルシウム等が用いられ
る得るのである。そして、それらの原料の使用に当たっ
ては、必ずしも上記の如きものの中から一種類ずつを選
択して用いる必要なく、それぞれの原料を二種類以上組
み合わせて使用しても、何等差し支えないのである。That is, first, predetermined amounts of various ceramic raw materials are prepared. In addition, as the ceramic raw material prepared there, any of various types can be adopted. That is, for example, as the Al 2 O 3 raw material, commercially available alumina clinker, aluminum hydroxide produced by the Bayer method, aluminum oxide obtained by heat-treating the same, natural bauxite and its calcined product, and the like can be mentioned. Further, as the SiO 2 raw material, silicon having a silica component, silica sand, kaolin having a silica-alumina component, ban shale, chamotte clay and the like can be used. Further, as the MgO raw material, commercially available magnesia, magnesium hydroxide, lightly burned magnesia, natural magnesite, and the like can be mentioned, and as the CaO raw material, calcia, calcium hydroxide, calcium carbonate, and the like can be used. In using these raw materials, it is not always necessary to select and use one kind from the above-mentioned ones, and it does not matter at all if two or more kinds of the respective raw materials are used in combination.
【００２６】次いで、それらの原料を均一に配合して配
合物を得、更にその得られた配合物を粉砕混合せしめ
て、粉砕混合物を得るのである。なお、それらの配合操
作及び粉砕混合操作においては、従来から公知の手法や
装置が何れも採用され得るものであり、例えば配合物の
粉砕混合は、湿式法若しくは乾式法の何れの手法によっ
ても行なわれ得るのである。Next, the raw materials are uniformly blended to obtain a blend, and the resulting blend is ground and mixed to obtain a ground mixture. In the compounding operation and the pulverizing and mixing operation, any of conventionally known methods and apparatuses can be adopted. For example, the pulverizing and mixing of the compound is performed by either a wet method or a dry method. It can be done.
【００２７】そして、かくして得られた粉砕混合物に対
して、造粒操作を施して、造粒物を得る。なお、かかる
造粒操作は、粉砕混合物の粉砕混合手法に応じた一般的
な方法により、実施されることとなる。例えば、湿式法
にて得られたスラリーは、オーガーマシン等の押出成形
機等により、ペレット状に造粒する。また、その際、か
かる押出成形機に、上述の如き骨材の横断面形状と同様
な形状とされたノズル孔を有するノズルを用いて、所定
の押出成形を行ない、これを所定の寸法にて切断すれ
ば、本発明に規定される横断面形状を有する造粒物が容
易に得られることとなる。そして、このような方法にお
いて、同一の大きさ及び形状のノズル孔が複数設けられ
てなるノズルを用いれば、単粒度の骨材が能率良く得ら
れるのであり、また各種の大きさや形状のノズル孔が組
み合わされてなるノズルを用いれば、嵩高性の高いコン
クリートを形成することのできる骨材が容易に得られる
こととなる。一方、乾式法にて得られた粉砕混合物は、
例えばプレスマシンやブリケットマシン等を用いて造粒
し、上述の如き所定形状の造粒物を得るのである。その
他、別の方法として、先ず、グリーンシートやグリーン
押出棒を形成し、その後、プレス型を用いて、これらを
所定形状を呈するペレット状に造粒することも可能であ
る。The pulverized mixture thus obtained is subjected to a granulation operation to obtain a granulated product. In addition, such a granulation operation will be performed by a general method according to the pulverization and mixing technique of the pulverized mixture. For example, the slurry obtained by the wet method is formed into pellets by an extruder such as an auger machine. Also, at this time, a predetermined extrusion molding is performed on the extruder using a nozzle having a nozzle hole having a shape similar to the cross-sectional shape of the aggregate as described above, and this is formed into a predetermined size. By cutting, a granulated product having the cross-sectional shape defined in the present invention can be easily obtained. In such a method, if a nozzle having a plurality of nozzle holes having the same size and shape is used, a single-grain aggregate can be obtained efficiently, and nozzle holes of various sizes and shapes can be obtained. If a nozzle formed by combining the above is used, an aggregate capable of forming a highly bulky concrete can be easily obtained. On the other hand, the pulverized mixture obtained by the dry method is
For example, granulation is performed using a press machine, a briquette machine, or the like to obtain a granulated product having a predetermined shape as described above. Alternatively, as another method, it is also possible to first form a green sheet or a green extruded rod, and then granulate them into a pellet having a predetermined shape using a press die.
【００２８】引き続いて、かくして得られた所定形状の
造粒物（成形体）を必要に応じて乾燥した後、常法に従
って焼成して、焼成物を得るのである。なお、かかる造
粒物の焼成は、使用されるセラミックス素材に応じて、
通常、１３００〜１９００℃の温度範囲内で、ロータリ
ーキルン、トンネルキルン、シャフトキルン等の一般的
な焼成設備を用いて、実施される。また、そのような焼
成操作において、焼成設備として、運動型のロータリー
キルンを使用する場合にあっては、上底面と各側面より
なる角部や下底面と各側面よりなる角部が面取り状態と
されて湾曲面を成した形状の焼成物が、簡単に得られる
こととなる。Subsequently, the granulated product (formed body) having a predetermined shape thus obtained is dried as required, and then fired according to a conventional method to obtain a fired product. The firing of the granulated material depends on the ceramic material used.
Usually, it is carried out in a temperature range of 1300 to 1900 ° C. using a general kiln such as a rotary kiln, a tunnel kiln and a shaft kiln. Further, in such a firing operation, when using a rotary kiln of the exercise type as the firing equipment, a corner formed by the upper bottom surface and each side surface and a corner portion formed by the lower bottom surface and each side surface are chamfered. A fired product having a curved surface shape can be easily obtained.
【００２９】そして、このようにして得られた各種の形
状を有するセラミック成形体の焼成物が、その用途等に
応じて、一種類が選択されて、或いは種々組み合わされ
て用いられ、それらが単独で、若しくは砕石や砕砂等と
混用されて、前述の如き優れた特徴を発揮するアスファ
ルトコンクリート用及びセメントコンクリート用人工成
形骨材として、有利に使用されるのである。なお、その
際、かかるコンクリート用人工成形骨材を、道路舗装材
料用コンクリートに用いる場合には、道路の表層部のみ
に使用しても良く、また建設材料用コンクリートに用い
る場合には、建材の内層部のみに使用することも可能で
あって、そのような使用形態においても、前述と同様な
効果が奏され得ることとなる。The fired ceramic molded bodies having various shapes obtained as described above are used singly or in various combinations depending on the application or the like. Or mixed with crushed stone or crushed sand, etc., and is advantageously used as an artificially formed aggregate for asphalt concrete and cement concrete exhibiting the above-mentioned excellent characteristics. At this time, when such artificially formed aggregate for concrete is used for concrete for road pavement material, it may be used only for the surface layer of the road, and when used for concrete for construction material, It is also possible to use it only for the inner layer part, and even in such a usage form, the same effect as described above can be obtained.
【００３０】[0030]
【実施例】以下に、本発明の幾つかの実施例を示し、本
発明を更に具体的に明らかにすることとするが、本発明
が、そのような実施例の記載によって、何等の制約をも
受けるものでないことは言うまでもないところである。
また、本発明には、以下の実施例の他にも、更には上記
の具体的記述以外にも、本発明の趣旨を逸脱しない限り
において、当業者の知識に基づいて種々なる変更、修
正、改良等を加え得るものであることが、理解されるべ
きである。EXAMPLES Hereinafter, some examples of the present invention will be described to clarify the present invention more specifically. However, the present invention imposes no restrictions on the description of such examples. It is needless to say that it is not something to receive.
In addition, in addition to the following examples, the present invention, in addition to the above-described specific description, various changes, corrections, and modifications based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that improvements can be made.
【００３１】先ず、Ａｌ2 Ｏ3 原料及びＳｉＯ2 原料と
して、市販の仮焼アルミナ及びカオリンを準備した。次
いで、焼成後の理論化学組成が下記表１に示す如きムラ
イト組成となるように、それらを配合して、配合物を得
た。First, commercially available calcined alumina and kaolin were prepared as the Al 2 O 3 raw material and the SiO 2 raw material. Then, they were blended so that the theoretical chemical composition after firing became a mullite composition as shown in Table 1 below to obtain a blend.
【００３２】[0032]
【表１】 [Table 1]
【００３３】その後、かくして得られた配合物をボール
ミル中に投入し、更に水を加えた後、平均粒子径が１０
０μｍ以下となるまで、湿式法により粉砕、混合を行な
い、泥漿を得た。引き続き、かかる泥漿をフィルタープ
レスにて脱水した後、オーガーマシンを用いて造粒成形
した。また、その際、かかる造粒成形工程において、オ
ーガーマシンのノズルのノズル孔を各種の形状のものに
変更して、互いに異なる横断面形状を有する５種類の成
形体を得た。それら５種類の成形体を、それぞれ、成形
体１〜５とし、その各横断面形状を下記表２に示した。
なお、それら成形体１〜５は、何れも、軸方向長さ：１
０mm、横断面の外接円の平均直径：１０mmの寸法を有す
るものである。Thereafter, the blend thus obtained was put into a ball mill, and water was further added.
Grinding and mixing were performed by a wet method until the thickness became 0 μm or less, and a slurry was obtained. Subsequently, the slurry was dewatered with a filter press, and then granulated using an auger machine. Also, at this time, in the granulation molding step, the nozzle holes of the nozzle of the auger machine were changed to those having various shapes to obtain five types of molded products having mutually different cross-sectional shapes. These five types of compacts were designated as compacts 1 to 5, respectively, and the cross-sectional shapes of the compacts are shown in Table 2 below.
Each of the molded bodies 1 to 5 has an axial length of 1: 1.
0 mm, average diameter of circumscribed circle of cross section: 10 mm.
【００３４】[0034]
【表２】 [Table 2]
【００３５】引き続いて、かくして得られた成形体１〜
５を各々乾燥した後、トンネルキルン若しくはシャフト
キルンにて、１８００℃、３０分焼成し、互いに横断面
形状の異なる５種類の焼成物を得、また、それとは別
に、成形体２をロータリーキルンにて、上記と同様な焼
成条件にて焼成し、上記５種類とは異なる外形形状を有
する焼成物を得た。そうして、目的とするコンクリート
用人工成形骨材たる６種類の焼成物を得、それらのう
ち、同一の化学組成を有するものの、互いに横断面形状
が異なる、前者５種類の焼成物を、それぞれ、骨材１〜
５とし、また、骨材２と同様な横断面形状を有するもの
の、前記ロータリーキルンにて焼成されて、全べての角
部が面取り状に湾曲面とされた、骨材２とは明らかに外
形形状の異なる後者１種類の焼成物を骨材６とした。更
に、比較のために、１０mmの平均粒径を有するものの、
不均一な形状を有する天然硬質砂岩６号砕石を所定量準
備し、これを比較骨材１とした。Subsequently, the moldings 1 thus obtained
After drying each of the molded products 5, each was fired at 1800 ° C. for 30 minutes in a tunnel kiln or shaft kiln to obtain five types of fired products having mutually different cross-sectional shapes. Then, firing was performed under the same firing conditions as described above to obtain a fired product having an outer shape different from the above five types. In this way, six types of fired products, which are the artificially formed aggregates for concrete, are obtained. Of these, the former five types of fired products having the same chemical composition but different cross-sectional shapes from each other are obtained. , Aggregate 1
5, and has the same cross-sectional shape as the aggregate 2, but is fired in the rotary kiln, and all corners are chamfered to be curved. The latter one type of fired material having a different shape was used as an aggregate 6. Further, for comparison, although having an average particle size of 10 mm,
A predetermined amount of natural hard sandstone No. 6 crushed stone having an uneven shape was prepared, and this was used as Comparative Aggregate 1.
【００３６】次に、それら骨材１〜６の物理的性質を調
べるために、それらを代表して、骨材１の表乾比重、見
掛比重、嵩比重、吸水率を、それぞれ、測定した。その
結果を下記表３に示す。なお、これらの物理特性の測定
は、日本学術振興会１２４委員会試験法分科会による、
学振法２．「マグネシアクリンカーの測定法」に準じて
行なった。Next, in order to examine the physical properties of the aggregates 1 to 6, representatively, the surface dry specific gravity, the apparent specific gravity, the bulk specific gravity, and the water absorption of the aggregate 1 were measured. . The results are shown in Table 3 below. The measurement of these physical properties was conducted by the Japan Society for the Promotion of Science 124 Committee
Gakushin method2. The measurement was carried out according to "Magnesia clinker measurement method".
【００３７】[0037]
【表３】 [Table 3]
【００３８】引き続いて、骨材１〜６及び比較骨材１を
粗骨材として用いる一方、粗砂として平均粒径１．２mm
の川砂を、また石粉として０．３mm以下の粒径を有する
石灰石を、それぞれ、所定量準備した。そして、それら
粗骨材と粗砂と石粉とを、８５：１１：４となる配合割
合にて、配合せしめ、粗骨材の種類の異なる各種排水性
アスファルトコンクリート用骨材を得た。Subsequently, while the aggregates 1 to 6 and the comparative aggregate 1 were used as coarse aggregates, the average particle diameter was 1.2 mm as coarse sand.
And a predetermined amount of limestone having a particle size of 0.3 mm or less as stone powder. Then, the coarse aggregate, coarse sand and stone powder were mixed at a mixing ratio of 85: 11: 4 to obtain various drainage asphalt concrete aggregates of different types of coarse aggregate.
【００３９】次いで、かくして得られた排水性アスファ
ルトコンクリート用骨材に対して、それぞれ、バインダ
として、２５℃針入度７０、軟化点９４．０の改質アス
ファルトを骨材全体に対して４．０％の割合となるよう
に配合した。そして、その後、それらの配合物をそれぞ
れ所定の型に投入し、その両面を５０回突き固めて、所
定形状を有する一方、各々異なる種類の骨材からなる７
種類のマーシャル供試体を得た。それら７種類のマーシ
ャル供試体のうち、骨材１〜６を含む排水性アスファル
トコンクリート用骨材からなるものを、それぞれ、供試
体１〜６とし、また、比較骨材１を含む排水性アスファ
ルトコンクリート用骨材からなるものを比較供試体１と
した。Then, as a binder, the modified asphalt having a penetration of 25 ° C. and a softening point of 94.0 was used as a binder for the thus obtained aggregate for drainable asphalt concrete. It was blended so as to have a ratio of 0%. Then, each of the blends is put into a predetermined mold, and both sides thereof are squeezed 50 times to have a predetermined shape.
Different types of marshall specimens were obtained. Of these seven types of marshall specimens, those composed of aggregates for drainable asphalt concrete including aggregates 1 to 6 are referred to as specimens 1 to 6, respectively, and drainable asphalt concrete including comparative aggregate 1 The specimen made of the aggregate for use was designated as comparative specimen 1.
【００４０】そして、それら供試体１〜６と比較供試体
１の排水性アスファルトコンクリート用骨材としての特
性を調べるために、マーシャル試験を行なった。その結
果を下記表４に示す。なお、かかる表中、全空隙率は、
常法に従って、各供試体の嵩密度と理論最大密度から求
め、連続空隙率、即ち表面から内部に連続して延びる空
隙の空隙率は、各供試体を水に浸漬せしめ、かかる連続
空隙に水を飽和させて求めた。具体的には、各供試体の
空中重量、２４時間水浸後の水中重量及びサイズ測定に
よる計算体積を、それぞれ、測定若しくは算出し、それ
らの値を下記（式１）に代入して、各供試体の連続空隙
率を求めた。 連続空隙率＝１−（Ａ−Ｂ）／Ｖ ・・・（式１） 但し、Ａ：供試体の空中重量（ｇ） Ｂ：２４時間水浸後の各供試体の水中重量（Ｇ） Ｖ：供試体の計算体積（cm3 ） また、独立空隙率、即ち内部に封入され独立した空隙の
空隙率は、それら全空隙率と連続空隙率との差より求め
た。更に、透水係数は、各供試体による変水位透水試験
法により求めた。即ち、各供試体を脱型せずに横置きに
した後、それらの上部に同一径のカラーを、各々セット
し、その後かかるカラー内に水を満たして、その水を各
供試体表面から内部に浸透せしめるよう為し、そしてカ
ラー内の水位が５→０cmになるまでの時間を測定して、
その測定値を下記（式２）に代入して、透水係数Ｋを算
出した。 Ｋ＝（２．３ａＬ／Ａｔ）log ｈ１／ｈ２ ・・・（式２） 但し、Ｋ：透水係数（cm／sec ) ，Ｌ：供試体の厚さ
（cm），ａ：モールドの断面積（cm2 ），Ａ：供試体の
断面積（cm2 ） ｔ：時間（sec ) ，ｈ１：供試体の厚さ＋水位（cm） ｈ２：供試体の厚さ（cm）とする。 そして、安定度とフロー値は、先ず、各供試体の側面を
円弧形状を呈する２枚の載荷板で挟み、その後それら各
供試体が破壊するまで、かかる載荷板に対して、温度：
６０℃、載荷速度：５０mm／sec の条件にて、径方向に
荷重を加え、各供試体の破壊時における最大荷重をもっ
て安定度とし、またその時点での変形量をもってフロー
値とした。A Marshall test was conducted to examine the properties of the specimens 1 to 6 and the comparative specimen 1 as aggregates for drainable asphalt concrete. The results are shown in Table 4 below. In this table, the total porosity is
In accordance with a conventional method, the continuous porosity, that is, the porosity of the void extending continuously from the surface to the inside, is determined by immersing each test piece in water, and the continuous void is determined by the bulk density and theoretical maximum density of each test piece. Was determined by saturation. Specifically, the aerial weight of each specimen, the weight in water after being immersed in water for 24 hours, and the volume calculated by size measurement are measured or calculated, respectively, and the values are substituted into the following (Equation 1). The continuous porosity of the specimen was determined. Continuous porosity = 1− (A−B) / V (Equation 1) where A: Aerial weight of test specimen (g) B: Weight of each test specimen after immersion in water for 24 hours (G) V : Calculated volume of test specimen (cm 3 ) Further, the independent porosity, that is, the porosity of the independent porosity enclosed inside, was determined from the difference between the total porosity and the continuous porosity. Further, the hydraulic conductivity was determined by a variable water permeability test method for each specimen. That is, after placing each specimen horizontally without removing it, a collar of the same diameter is set on each of them, and then the collar is filled with water, and the water is filled from the surface of each specimen into the interior. And measure the time until the water level in the collar becomes 5 → 0cm,
The measured value was substituted into the following (Equation 2) to calculate the hydraulic conductivity K. K = (2.3 aL / At) log h1 / h2 (Equation 2) where K: permeability (cm / sec), L: thickness of the specimen (cm), a: cross-sectional area of the mold ( cm 2 ), A: cross-sectional area of the specimen (cm 2 ) t: time (sec), h1: thickness of the specimen + water level (cm) h2: thickness of the specimen (cm) Then, the stability and the flow value are obtained by first sandwiching the side surface of each specimen between two loading plates exhibiting an arc shape, and then, until each of the specimens breaks, the temperature:
Under the conditions of 60 ° C. and a loading speed of 50 mm / sec, a load was applied in the radial direction, the maximum load at the time of destruction of each specimen was taken as the stability, and the deformation at that time was taken as the flow value.
【００４１】[0041]
【表４】 [Table 4]
【００４２】かかる表４の結果から明らかなように、本
発明において規定される形状を有するコンクリート用人
工成形骨材を含む供試体１〜６は、不均一な形状を有す
る天然砕石を骨材として含む比較供試体１と比較して、
何れも、連続空隙率が明らかに大きい値を示している。
そして、それによって、供試体１〜６にあっては、全空
隙率が有利に高められており、また、各供試体の透水性
を示す透水係数も、著しく向上せしめられている。更
に、安定度においても、供試体１〜６は、比較供試体１
よりも相対的に高い値を示している。即ち、これらは、
本発明において規定される形状を有するコンクリート用
人工成形骨材を用いて得られるコンクリートが、従来の
天然砕石を骨材として用いて得られるコンクリートより
も、透水性（排水性）と安定性の両特性において優れた
ものであることが立証される結果となっているのであ
る。As is apparent from the results in Table 4, the specimens 1 to 6 including the artificially formed aggregate for concrete having the shape specified in the present invention were obtained by using natural crushed stone having an uneven shape as an aggregate. In comparison with the comparative specimen 1 including
In each case, the continuous porosity shows a clearly large value.
As a result, in the specimens 1 to 6, the total porosity is advantageously increased, and the water permeability, which indicates the water permeability of each specimen, is also significantly improved. Further, also in the stability, the test specimens 1 to 6 are comparative specimens 1
It shows a relatively higher value than that. That is, these are:
The concrete obtained by using the artificially formed aggregate for concrete having the shape specified in the present invention has both better water permeability (drainage) and stability than concrete obtained by using conventional natural crushed stone as the aggregate. The results proved to be excellent in characteristics.
【００４３】[0043]
【発明の効果】以上の説明から明らかなように、本発明
に従うコンクリート用人工成形骨材にあっては、全体と
して柱状の形状を呈し、横断面が、多角形形状若しくは
多角形の変形形状を有するところから、アスファルトや
セメントとの混用によって、表面から内部に連続して延
びる空隙の空隙率が高く、しかも安定性に優れたコンク
リートを形成することが出来るのであり、従って、透水
舗装や吸音舗装、更には吸音、防音、断熱建材等に使用
されるアスファルトコンクリートやセメントコンクリー
ト等の骨材として、極めて有効に用いられ得るのであ
る。As is apparent from the above description, the artificially formed aggregate for concrete according to the present invention has a columnar shape as a whole and has a polygonal shape or a polygonal deformed shape in cross section. Because it has a high porosity of voids extending continuously from the surface to the inside by mixing with asphalt and cement, it is possible to form concrete with excellent stability, and therefore, water-permeable pavement and sound-absorbing pavement can be formed. Further, it can be used very effectively as an aggregate such as asphalt concrete or cement concrete used for sound absorption, sound insulation, heat insulation building materials and the like.
【００４４】また、本発明の好ましい実施態様に従っ
て、人工成形骨材の横断面形状における角部部分を外方
に膨出した膨大部とすれば、そのコンクリート中への埋
没効果が著しく高められ得て、アスファルトコンクリー
トやセメントコンクリート中への部分的な混在によっ
て、コンクリートの構造強度が効果的に高められ得る一
方、その流動性が減少せしめられ得、以てそのようなコ
ンクリートからなる最終製品の耐久性が有利に向上せし
められ得ることとなるのである。Further, according to a preferred embodiment of the present invention, if the corners in the cross-sectional shape of the artificially formed aggregate are formed as bulging outwards, the effect of burying the concrete in concrete can be significantly enhanced. Thus, the partial incorporation into asphalt concrete or cement concrete can effectively increase the structural strength of the concrete, while reducing its fluidity, thus reducing the endurance of the final product made of such concrete. This can advantageously improve the performance.
【図１】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が多角形形状を有するものの具体例を示す
斜視説明図であり、（ａ）〜（ｃ）はそれぞれその異な
る例を示すものである。FIG. 1 is a perspective explanatory view showing a specific example of an artificially formed aggregate for concrete according to the present invention having a polygonal cross section, and FIGS. 1 (a) to 1 (c) show different examples thereof. is there.
【図２】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が、多角形の各辺部が凸状に膨出せしめら
れてなる形状を有するものの具体例を示す斜視説明図で
あり、（ａ）〜（ｃ）はそれぞれその異なる例を示すも
のである。FIG. 2 is a perspective explanatory view showing a specific example of an artificially formed aggregate for concrete according to the present invention having a cross section having a shape in which each side of a polygon is bulged convexly; (a) to (c) show different examples.
【図３】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が、多角形の各辺部が凹状に屈曲せしめら
れてなる形状を有するものの具体例を示す斜視説明図で
あり、（ａ）〜（ｃ）はそれぞれその異なる例を示すも
のである。FIG. 3 is a perspective explanatory view showing a specific example of an artificially formed aggregate for concrete according to the present invention, in which the cross section has a shape in which each side of a polygon is bent in a concave shape; (C) show different examples.
【図４】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が、多角形の各辺部が凹状に湾曲せしめら
れてなる形状を有するものの具体例を示す斜視説明図で
あり、（ａ）〜（ｃ）はそれぞれその異なる例を示すも
のである。FIG. 4 is a perspective explanatory view showing a specific example of an artificially formed aggregate for concrete according to the present invention having a cross section having a shape in which each side of a polygon is curved in a concave shape; (C) show different examples.
【図５】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が、各角部部分が円弧状とされた形状を有
するものの具体例を示す斜視説明図であり、（ａ）〜
（ｄ）はそれぞれその異なる例を示すものである。FIG. 5 is a perspective explanatory view showing a specific example of an artificially formed aggregate for concrete according to the present invention in which a cross section has a shape in which each corner portion is formed in an arc shape;
(D) shows different examples.
【図６】本発明に従うコンクリート用人工成形骨材にお
いて、横断面が、各角部部分に外方に膨出した膨大部が
形成されてなる形状を有するものの具体例を示す斜視説
明図であり、（ａ）〜（ｄ）はそれぞれその異なる例を
示すものである。FIG. 6 is a perspective explanatory view showing a specific example of the artificially formed aggregate for concrete according to the present invention, in which the cross section has a shape in which a bulging portion bulging outward is formed at each corner portion. , (A) to (d) show different examples.
１０ 横断面 １２ 側面 １４ 角部 １６ 膨大部 10 Cross section 12 Side surface 14 Corner 16 Enlarged part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 14/36 C04B 20/00──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 6 , DB name) C04B 14/36 C04B 20/00
Claims (2)
て、その横断面が、多角形形状、多角形の各辺部が凸状
に膨出せしめられてなる形状、多角形の各辺部が凹状に
凹陥せしめられてなる形状、並びにそれら各形状の角部
がそれぞれ円弧状とされた形状のうち、何れかの形状を
有することを特徴とするコンクリート用人工成形骨材。1. A fired product of a columnar ceramic molded body, the cross section of which has a polygonal shape, a shape in which each side of a polygon is bulged in a convex shape, and each side of a polygon. An artificially formed aggregate for concrete, characterized in that the artificially formed aggregate has any one of a shape obtained by denting a shape into a concave shape, and a shape in which a corner of each shape is formed in an arc shape.
れぞれ外方に膨出した膨大部とされていることを特徴と
する請求項１に記載のコンクリート用人工成形骨材。2. The artificially formed aggregate for concrete according to claim 1, wherein the corner portions in the cross-sectional shape are bulged outwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5158002A JP2851514B2 (en) | 1993-06-02 | 1993-06-02 | Artificial molded aggregate for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5158002A JP2851514B2 (en) | 1993-06-02 | 1993-06-02 | Artificial molded aggregate for concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06345503A JPH06345503A (en) | 1994-12-20 |
| JP2851514B2 true JP2851514B2 (en) | 1999-01-27 |
Family
ID=15662108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5158002A Expired - Fee Related JP2851514B2 (en) | 1993-06-02 | 1993-06-02 | Artificial molded aggregate for concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2851514B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102491764B1 (en) * | 2021-11-19 | 2023-01-27 | 김규태 | Method for making polymer modified asphalt based on Noise reduction and high performance of drainage |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019082022A (en) * | 2017-10-30 | 2019-05-30 | 綾羽株式会社 | Asphalt mixture and manufacturing method thereof |
| KR20240168354A (en) * | 2022-03-21 | 2024-11-29 | 마바 인코포레이티드 | Shaped aggregate reinforcement for concrete |
-
1993
- 1993-06-02 JP JP5158002A patent/JP2851514B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102491764B1 (en) * | 2021-11-19 | 2023-01-27 | 김규태 | Method for making polymer modified asphalt based on Noise reduction and high performance of drainage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06345503A (en) | 1994-12-20 |
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