JPH066498B2 - Non-base-reactive aggregate and method for suppressing base-aggregate reaction - Google Patents
Non-base-reactive aggregate and method for suppressing base-aggregate reactionInfo
- Publication number
- JPH066498B2 JPH066498B2 JP1004072A JP407289A JPH066498B2 JP H066498 B2 JPH066498 B2 JP H066498B2 JP 1004072 A JP1004072 A JP 1004072A JP 407289 A JP407289 A JP 407289A JP H066498 B2 JPH066498 B2 JP H066498B2
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- reactive
- base
- reaction
- suppressing
- 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 - Lifetime
Links
- 238000006243 chemical reaction Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 10
- 239000011707 mineral Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 9
- 239000011396 hydraulic cement Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000000243 solution Substances 0.000 description 9
- 239000003513 alkali Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 230000009257 reactivity Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052611 pyroxene Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910008051 Si-OH Inorganic materials 0.000 description 1
- 229910006358 Si—OH Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000011045 chalcedony Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000011022 opal Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000005335 volcanic glass 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
- 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
-
- 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
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 利用分野 本発明は、塩基性成分との反応を実質的に防止した非塩
基反応性骨材、および塩基性成分と反応性である鉱物性
骨材を含む組成物中での塩基・骨材反応の抑制方法に関
する。本発明は、例えばセメント系硬化物の耐久性の向
上および表面汚染の防止等に、極めて有用である。Description: FIELD OF THE INVENTION The present invention relates to a composition containing a non-base-reactive aggregate that substantially prevents reaction with a basic component, and a mineral aggregate that is reactive with a basic component. Method for suppressing base-aggregate reaction in a plant. INDUSTRIAL APPLICABILITY The present invention is extremely useful in, for example, improving the durability of a cement-based cured product and preventing surface contamination.
従来の技術および問題点 塩基・骨材反応は、特にコンクリート構造物の耐久性に
関して大きな問題となっており、コンクリートの耐用年
数が30年以下となる場合もあり得る状態である。この主
な原因としては、骨材中の反応性シリカ鉱物がセメント
中の塩基成分（特にアルカリ金属成分）と反応してアル
カリ・シリカ系ゲルを生成し、該ゲルが水分を吸収して
膨張および析出してコンクリートのクラック、破損、汚
染等を形成するものと思考されている。Conventional Technology and Problems Base-aggregate reaction has become a serious problem especially with regard to durability of concrete structures, and it is possible that the useful life of concrete may be 30 years or less. The main reason for this is that the reactive silica mineral in the aggregate reacts with the base component (particularly the alkali metal component) in the cement to form an alkali-silica gel, and the gel absorbs water to expand and It is thought to deposit and form concrete cracks, damage, pollution, etc.
従来、このアルカリ・骨材反応を抑制する方法として
は、セメント中のアルカリ金属成分含有量を下げる方法
や、フライアッシュ等を添加し、そのアルカリ補足効果
あるいは希釈効果によるアルカリ・骨材反応を抑制する
方法が取られていた（セメント化学専門委員会報告Ｃ−
２、「アルカリ骨材反応に関する文献調査」セメント協
会発行、1984年）。しかしながら、このような方法では
骨材の反応性を長期的に抑制することは本質的に困難で
あり、１か月ないし数年後にはアルカリ・骨材反応が生
じてくる傾向がある。Conventionally, as a method of suppressing this alkali-aggregate reaction, a method of reducing the content of alkali metal components in cement or adding fly ash etc. to suppress the alkali-aggregate reaction due to its alkali supplementing effect or dilution effect Was adopted (Cement Chemistry Special Committee Report C-
2. "Document research on alkali-aggregate reaction," published by Cement Association, 1984). However, it is essentially difficult for such a method to suppress the reactivity of the aggregate for a long period of time, and the alkali-aggregate reaction tends to occur after one month or several years.
本発明の主目的は、上記の塩基・骨材反応を実質的に防
止した鉱物性骨材、ならびに水硬性セメント組成物中の
塩基・骨材反応を抑制する方法を提供することである。The main object of the present invention is to provide a mineral aggregate in which the above-mentioned base-aggregate reaction is substantially prevented, and a method for suppressing the base-aggregate reaction in a hydraulic cement composition.
問題点を解決するための手段 本発明者は、塩基性成分（代表的にはアルカリ成分）と
反応性である珪酸塩系骨材の反応性は、該珪酸塩のシリ
カ成分の反応性（例えばシリカ成分のラジカルまたはイ
オン等による反応性）が主な原因であることに着目し
た。予想外にも、該珪酸塩系骨材に過酸化水素液（以下
にH2O2液ということがある）を接触させることによっ
て、該塩基性成分と接触する該骨材粒子の表面構造が長
期的に改質安定化することを見出した。Means for Solving the Problems The present inventors have found that the reactivity of a silicate-based aggregate that is reactive with a basic component (typically, an alkali component) depends on the reactivity of the silica component of the silicate (for example, It was noted that the main cause is the reactivity of the silica component due to radicals or ions. Unexpectedly, by bringing a hydrogen peroxide solution (hereinafter sometimes referred to as H 2 O 2 solution) into contact with the silicate-based aggregate, the surface structure of the aggregate particles in contact with the basic component is It has been found that the reforming is stabilized in the long term.
従って本発明によって、塩基性成分と反応性である鉱物
性骨材（ただし高炉徐冷スラグを除外する）を過酸化水
素水にて処理して該骨材の反応部位を改質してなる、塩
基との反応を実質的に防止した鉱物性骨材が提供され
る。Therefore, according to the present invention, a mineral aggregate that is reactive with a basic component (excluding blast furnace slowly cooled slag) is treated with hydrogen peroxide water to modify the reaction site of the aggregate. Provided is a mineral aggregate which is substantially prevented from reacting with a base.
上記のH2O2を骨材粒子に接触させる方法としては、H2O2
液に浸漬する方法までH2O2液をスプレーする方法等が代
表的である。該骨材をセメント系材料に混入する場合
は、前もってH2O2にて改質した骨材を使用してもよく、
或いは混和水の添加の際にH2O2液を添加または使用して
もよい。As a method of bringing the above H 2 O 2 into contact with the aggregate particles, H 2 O 2
A typical method is to spray the H 2 O 2 solution until it is immersed in the solution. When the aggregate is mixed with the cementitious material, aggregate modified with H 2 O 2 in advance may be used,
Alternatively, the H 2 O 2 solution may be added or used when the mixed water is added.
従って本発明によって、塩基性成分と反応性である鉱物
性骨材（ただし高炉徐冷スラグを除外する）を過酸化水
素水にて処理した骨材をセメント用骨材として使用する
ことを特徴とする、水硬性セメント系組成物の塩基・骨
材反応の抑制方法が提供される。また、塩基性成分と反
応性である鉱物性骨材、水硬性セメントおよび水を含む
セメント系材料を混和する際に、該水成分の0.05重量％
以上の過酸化水素を存在せしめることを特徴とする、水
硬性セメント系組成物の塩基・骨材反応の抑制方法が提
供される。Therefore, according to the present invention, an aggregate obtained by treating a mineral aggregate that is reactive with a basic component (excluding blast furnace slowly cooled slag) with hydrogen peroxide water is used as an aggregate for cement. A method for suppressing a reaction between a base and an aggregate of a hydraulic cement-based composition is provided. Further, when a mineral aggregate that is reactive with a basic component, a hydraulic cement and a cementitious material containing water are mixed, 0.05% by weight of the water component
There is provided a method for suppressing a reaction between a base and an aggregate in a hydraulic cement-based composition, which is characterized by allowing the above hydrogen peroxide to be present.
発明の詳しい記述 (1)塩基性成分と反応性である骨材の例示反応性骨材と
しては、岩石中に、反応性のシリカ鉱物であるオパー
ル、クリストバライト、トリジマイト、火山性ガラス、
および／または玉髄等を含むものが例示される。一般的
には火成岩系骨材があり、輝石安山岩が代表的である。
高炉水砕スラグ（水冷破砕高炉スラグ）からなる粗骨
材、細骨材、微粉砕スラグ等も上記の成分を含有しそし
てガラス質表面を有するので、少量を使用した場合に特
に反応性である。なお、熔融高炉スラグを放置徐冷しそ
して破砕してなる高炉徐冷スラグは、結晶性の非ガラス
質表面を有するため塩基性成分と実質的に非反応性であ
り、従って本発明における塩基性骨材に該当しない。ま
た、陶磁器などのセラミックス粉砕品やガラス粉砕骨材
も、反応性である。海砂も反応性の大きい骨材である。
なお本発明において、これらの反応性骨材と他の骨材を
組合せて使用することも、当然可能である。Detailed Description of the Invention (1) Exemplified reactive aggregates that are reactive with basic components, as reactive aggregates, opal, cristobalite, tridymite, volcanic glass, which are reactive silica minerals, in rocks,
And / or those containing chalcedony are exemplified. Generally, there are igneous rock aggregates, and pyroxene andesite is typical.
Coarse aggregates, fine aggregates, finely pulverized slag, etc. made of granulated blast furnace slag (water-cooled crushed blast furnace slag) also contain the above components and have a glassy surface, so they are particularly reactive when used in small amounts. . The blast furnace slowly cooled slag obtained by allowing the molten blast furnace slag to be slowly cooled and then crushed is substantially non-reactive with the basic component because it has a crystalline non-glassy surface, and thus the basic Not applicable to aggregate. In addition, ground ceramics such as ceramics and ground glass aggregate are also reactive. Sea sand is also a highly reactive aggregate.
In the present invention, it is of course possible to use these reactive aggregates in combination with other aggregates.
(2)過酸化水素液 本発明にて使用するH2O2液としては、工業用に安価に市
販されているH2O2が30〜35重量%のH2O2液水溶液の希釈
液が有利に使用できる。使用するH2O2の濃度（重量％）
は、一般的に0.05〜35%の範囲であり、通常は0.2〜10%
程度であり、そして代表的には１〜5%程度である。(2) Hydrogen Peroxide Solution As the H 2 O 2 solution used in the present invention, a commercially available H 2 O 2 commercially available at a low cost is a diluting solution of an H 2 O 2 solution aqueous solution of 30 to 35% by weight. Can be advantageously used. Concentration of H 2 O 2 used (% by weight)
Is generally in the range of 0.05-35%, usually 0.2-10%
It is about, and typically about 1-5%.
該反応性骨材をH2O2液にて接触処理する場合は、H2O2水
に浸漬（例えば1.5%濃度にて数時間以上）するか、また
はH2O2水をスプレーすることができる。一般的に、接触
処理した後に、処理済骨材を水洗するのが好ましい場合
もあるが、水洗しなくともよい。When the reactive aggregate is subjected to contact treatment with a H 2 O 2 solution, it should be immersed in H 2 O 2 water (for example, at a concentration of 1.5% for several hours or more) or sprayed with H 2 O 2 water. You can Generally, it may be preferable to wash the treated aggregate with water after the contact treatment, but it may not be washed.
セメント系材料に混和水を添加する際にH2O2液を添加ま
たは使用する場合は、H2O2水濃度として0.05〜10%程
度、好ましくは0.1〜5%程度が適当である。この場合、H
2O2の分解を調整するために、還元性化合物（例えば亜
硫酸塩または亜硝酸塩）を適度に併用するのも望ましい
一態様である。When the H 2 O 2 liquid is added or used when adding mixed water to the cement-based material, the H 2 O 2 water concentration is about 0.05 to 10%, preferably about 0.1 to 5%. In this case, H
It is also a desirable embodiment to use a reducing compound (for example, sulfite or nitrite) in an appropriate amount for controlling the decomposition of 2 O 2 .
(3)具体例１〜３ 骨材として、アルカリシリカ反応性である輝石安山岩20
重量%および該反応性に乏しい川砂80重量%を使用した。
輝石安山岩骨材としては、未処理のもの（例１）、1.5
重量%H2O2水中に１週間浸漬したもの（例２）、および
１週間浸漬後に水洗したもの（例３）を、それぞれ使用
した。(3) Concrete Examples 1 to 3 As an aggregate, pyroxene andesite which is alkali silica reactive 20
% By weight and 80% by weight of the less reactive river sand were used.
The pyroxene andesite aggregate is untreated (Example 1), 1.5
One that had been dipped in H 2 O 2 water by weight for 1 week (Example 2) and one that had been dipped for 1 week and then washed with water (Example 3) were used.
ASTM C 227-71に準じ、セメント１重量部に対して、骨
材（粒径0.15〜4.75mm）2.25重量部とし、水量のテーブ
ルフローで105〜120となるように調整した、モルタルを
作成した。モルタルバー供試体(25×25×285mm)を脱型
後、37.8±1.7℃、RH100%に保ち、コンパレーターによ
り長さ変化を測定した。なお、使用したセメントは普通
ポルトランドセメントであり、その全アルカリ量(R2O)
はNa2O換算で0.49%（Na2O：0.3、K2O：0.29）であっ
た。R2O量を変化させるための試薬級のNaOHおよびKOHを
前記の比で添加し、R2O 1.38%とした。長さの測定結果
を下表に示す。According to ASTM C 227-71, mortar was prepared with 2.25 parts by weight of aggregate (particle size 0.15 to 4.75 mm) to 1 part by weight of cement and adjusted to 105 to 120 by table flow of water amount. . After demolding the mortar bar test piece (25 × 25 × 285 mm), the length change was measured by a comparator while maintaining the temperature at 37.8 ± 1.7 ° C. and RH 100%. The cement used was ordinary Portland cement, and its total alkali content (R 2 O)
0.49% for terms of Na 2 O (Na 2 O: 0.3, K 2 O: 0.29) was. Reagent grade NaOH and KOH for varying the amount of R 2 O were added in the above ratio to give R 2 O 1.38%. The results of length measurement are shown in the table below.
上記の結果は、上記のASTM類似のJIS A5308付属書８
（モルタルバー法）の判定基準「平均膨張率が６か月後
に0.100%未満の場合は無害、0.100%以上の混合は有害と
する」からみても、明白である。すなわち、例１（比較
例）は極めて有害、そして例２〜３は完全に無害であ
る。 The above results are based on JIS A5308 Annex 8 similar to the above ASTM.
It is also clear from the criteria of the (mortar bar method), "when the average expansion coefficient is less than 0.100% after 6 months, it is harmless, and when the average expansion coefficient is 0.100% or more is harmful". That is, Example 1 (Comparative Example) is extremely harmful, and Examples 2-3 are completely harmless.
作用および効果 塩基成分およびこれの反応性の骨材が共存する組成物中
の塩基・骨材反応（特に骨材のアルカリシリカ反応）
は、該組成物の耐久性および汚染に極めて有害である
が、本質的に未解決の状態にあった。本発明の作用は、
充分には解明されていないが、該反応性骨材にH2O2液を
浸漬等によって接触させることによって該骨材粒子の反
応性部位である表面のガラス構造が含水ゲル状物質に改
質されて、その反応性が効果的に抑制される効果を達成
するものと思考される。例えば、反応性シリカ成分は代
表的に≡Si-0の反応部位を有するが、この場合にはH2O2
水が作用して長期的に安定な≡Si-OH構造に改質されそ
してその反応性も充分に抑制されるものと思考される。
しかしながら、本発明はこのような代表的な理論に拘束
されるものではない。Action and effect Base-aggregate reaction in a composition in which a base component and its reactive aggregate coexist (especially alkali-silica reaction of aggregate)
Was extremely detrimental to the durability and staining of the composition, but was essentially unsolved. The operation of the present invention is
Although not fully clarified, the glass structure of the surface, which is the reactive site of the aggregate particles, is modified into a hydrous gel-like substance by contacting the reactive aggregate with a H 2 O 2 solution by immersion or the like. Therefore, it is thought that the reactivity is effectively suppressed. For example, the reactive silica component typically has a reactive site of ≡Si-0, in which case H 2 O 2
It is considered that water acts to reform the long-term stable ≡Si-OH structure and its reactivity is sufficiently suppressed.
However, the present invention is not bound by such a representative theory.
本発明により非反応性改質骨材は、塩基成分（特にアル
カリ成分）と共存する組成物の長期的安定化に極めて有
用である。代表的には、モルタルおよびコンクリート等
のセメント系硬化物の長期安定性に有効である。更に、
該組成物中に、アルカリ成分含有量の多い混和剤、添加
剤等を使用することが容易となる効果も達成される。な
お本発明にて使用するH2O2は、他の添加剤薬品と異な
り、作用後に実質的に水分となり、無色、無臭、無毒性
であり、また残存成分が製品の品質、強度等に悪影響し
ない効果がある。The non-reactive modified aggregate according to the present invention is extremely useful for long-term stabilization of a composition coexisting with a base component (particularly an alkali component). Typically, it is effective for long-term stability of hardened cementitious materials such as mortar and concrete. Furthermore,
The effect of facilitating the use of admixtures, additives, etc. having a high content of alkali components in the composition is also achieved. Note that H 2 O 2 used in the present invention, unlike other additive chemicals, becomes substantially water after the action, and is colorless, odorless, and nontoxic, and the residual components adversely affect the product quality, strength, etc. Not effective.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 日比野 毅 愛知県常滑市鯉江本町３丁目６番地 株式 会社イナックス内 審査官 鈴木 紀子 (56)参考文献 特開 昭59−133304（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Hibino 3-6, Koiemotocho, Tokoname City, Aichi Prefecture Inax Co., Ltd. Examiner Noriko Suzuki (56) References JP-A-59-133304 (JP, A)
Claims (3)
だし高炉徐冷スラグを除外する）を過酸化水素水にて処
理して該骨材の反応部位を改質してなる、塩基との反応
を実質的に防止した鉱物性骨材。1. A mineral aggregate that is reactive with a basic component (excluding slowly cooled blast furnace slag) is treated with hydrogen peroxide to modify the reaction site of the aggregate. Mineral aggregate that substantially prevents reaction with bases.
だし高炉徐冷スラグを除外する）を過酸化水素水にて処
理した骨材をセメント用骨材として使用することを特徴
とする、水硬性セメント系組成物の塩基・骨材反応の抑
制方法。2. An aggregate obtained by treating a mineral aggregate that is reactive with a basic component (excluding slowly cooled blast furnace slag) with hydrogen peroxide, and using the aggregate as a cement aggregate. A method for suppressing a base-aggregate reaction of a hydraulic cement composition.
硬性セメントおよび水を含むセメント系材料を混和する
際に、該水成分の0.05重量％以上の過酸化水素を存在せ
しめることを特徴とする、水硬性セメント系組成物の塩
基・骨材反応の抑制方法。3. When mixing a mineral aggregate, a hydraulic cement and a cementitious material containing water, which are reactive with a basic component, at least 0.05% by weight of hydrogen peroxide is present in the water component. A method for suppressing a reaction between a base and an aggregate of a hydraulic cement-based composition, which comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1004072A JPH066498B2 (en) | 1989-01-11 | 1989-01-11 | Non-base-reactive aggregate and method for suppressing base-aggregate reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1004072A JPH066498B2 (en) | 1989-01-11 | 1989-01-11 | Non-base-reactive aggregate and method for suppressing base-aggregate reaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02184549A JPH02184549A (en) | 1990-07-19 |
| JPH066498B2 true JPH066498B2 (en) | 1994-01-26 |
Family
ID=11574606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1004072A Expired - Lifetime JPH066498B2 (en) | 1989-01-11 | 1989-01-11 | Non-base-reactive aggregate and method for suppressing base-aggregate reaction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066498B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247686A (en) * | 2007-03-30 | 2008-10-16 | Taiheiyo Cement Corp | Alkali-aggregate reaction inhibitor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491946B1 (en) * | 1990-07-11 | 1998-06-03 | Inax Corporation | Mineral substance prevented from undergoing basic reaction and method of preventing said reaction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59133304A (en) * | 1983-01-19 | 1984-07-31 | Nippon Steel Corp | Method for accelerating aging of slag cooled slowly in blast furnace |
-
1989
- 1989-01-11 JP JP1004072A patent/JPH066498B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247686A (en) * | 2007-03-30 | 2008-10-16 | Taiheiyo Cement Corp | Alkali-aggregate reaction inhibitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02184549A (en) | 1990-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hornain et al. | Diffusion of chloride ions in limestone filler blended cement pastes and mortars | |
| KR100714738B1 (en) | Cement Admixtures, Cement Compositions and Cement Concrete Using the Same | |
| Naiqian et al. | Mechanism of natural zeolite powder in preventing alkali—silica reaction in concrete | |
| GB2305428A (en) | Admixture for inhibiting drying shrinkage of cement | |
| GB2305429A (en) | Cement admixture | |
| EP1201617A1 (en) | Cement compositions with high durability | |
| CN1080707C (en) | Control of expansion in concrete due to alkali silica reaction | |
| JPS581068B2 (en) | concrete mixture or mortar mixture | |
| AU2001229721B2 (en) | Lithium glass compositions | |
| EP2382168B1 (en) | Sulphur cement pre-composition and sulphur cement product | |
| AU715970B2 (en) | Concrete compositions and processes for controlling alkali-silica reaction in same | |
| AU2001229721A2 (en) | Lithium glass compositions | |
| AU2001229721A1 (en) | Lithium glass compositions | |
| JPH066498B2 (en) | Non-base-reactive aggregate and method for suppressing base-aggregate reaction | |
| JPH0613422B2 (en) | Method for improving the properties of cement mortar and concrete | |
| KR0139088B1 (en) | Mineral substance prevented from undergoing basic reaction and method of preventing said reaction | |
| JP2503226B2 (en) | Alkali aggregate reaction inhibitor | |
| JPH0733274B2 (en) | Mineral aggregate that prevents base reaction and method for suppressing base-aggregate reaction | |
| CZ81094A3 (en) | Process of treatment contaminating waste and a product obtained therefrom | |
| JP7558625B2 (en) | Fast-hardening grout composition and fast-hardening grout | |
| KR20040099671A (en) | A solidification agent to treat solidification/stabilization of ash | |
| RU1811681C (en) | Glass-fiber-concrete mixture | |
| JPH0352421B2 (en) | ||
| KR900000564B1 (en) | Method for producing reinforced cement products | |
| JPH05330880A (en) | Cement admixture and cement composition |