JPS63117939A - Inhibition of alkali aggregate ra reaction using burnt montmorillonite - Google Patents
Inhibition of alkali aggregate ra reaction using burnt montmorilloniteInfo
- Publication number
- JPS63117939A JPS63117939A JP26350286A JP26350286A JPS63117939A JP S63117939 A JPS63117939 A JP S63117939A JP 26350286 A JP26350286 A JP 26350286A JP 26350286 A JP26350286 A JP 26350286A JP S63117939 A JPS63117939 A JP S63117939A
- Authority
- JP
- Japan
- Prior art keywords
- montmorillonite
- aggregate
- mortar
- alkali
- amount
- 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.)
- Pending
Links
- 229910052901 montmorillonite Inorganic materials 0.000 title claims description 25
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 title claims description 22
- 239000003513 alkali Substances 0.000 title claims description 15
- 238000006243 chemical reaction Methods 0.000 title claims description 15
- 230000005764 inhibitory process Effects 0.000 title 1
- 239000004570 mortar (masonry) Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000010276 construction Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004898 kneading Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910000273 nontronite Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- -1 aluminian saporite Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- VNSBYDPZHCQWNB-UHFFFAOYSA-N calcium;aluminum;dioxido(oxo)silane;sodium;hydrate Chemical compound O.[Na].[Al].[Ca+2].[O-][Si]([O-])=O VNSBYDPZHCQWNB-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 229910000271 hectorite Inorganic materials 0.000 description 1
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910000276 sauconite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、焼成モンモリナイトを用いたアルカリ骨材反
応を抑制する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for suppressing alkaline aggregate reactions using calcined montmorinite.
最近９モルタルおよびコンクリート構造物中におけるア
ルカリと骨材との反応が問題になっている。モルタルお
よびコンクリート構造物は、しばしば、このアルカリ骨
材反応に起因して膨張し。Recently, the reaction between alkali and aggregate in mortar and concrete structures has become a problem. Mortar and concrete structures often expand due to this alkaline aggregate reaction.
クランクが発生し、劣化する。その対策として。Crank occurs and deteriorates. As a countermeasure.
建設省は、最近（昭和６１年６月２日）イ、（化学法ま
たはモルタルバー法により）安全と認められる骨材の使
用
ロ、低アルカリ形（Ｎａ２０当量が０．６％以下）セメ
ントの使用
ハ、抑制効果のある混合セメント（高炉セメント８種ま
たは０種）の使用
二、コンクリート中のアルカリ総量の抑制（ＮａｚＯ量
が３．０ｋｇ／ｍ３以下とする）の措置を講することが
望ましいという趣旨の通達を出している。The Ministry of Construction recently (June 2, 1986) recommended the use of aggregates recognized as safe (according to the chemical law or mortar bar method) and the use of low-alkali cement (Na20 equivalent is 0.6% or less). It is desirable to use a mixed cement that has a suppressing effect (class 8 or 0 blast furnace cement), and to take measures to control the total amount of alkali in concrete (the amount of NazO should be 3.0 kg/m3 or less). A notice has been issued to this effect.
前記口およびハでいうセメントは、特殊なセメントであ
って、それぞれ特別な特性を有しているが、これまでの
ところ、それらの使用量は少なく。The cements mentioned above are special cements, each having special properties, but so far their usage has been small.
土木建築その他のコンクリート施工では、普通ポルトラ
ンドセメントが、全セメント使用量の８０％以上の量で
使用されている。この普通ポルトランドセメントは、
Ｎａｎｏ当量が０．６〜１．０ ％程度、場合によって
は、１．２％程度であることもある。In civil engineering and other concrete construction, ordinary Portland cement accounts for over 80% of the total amount of cement used. This ordinary Portland cement is
The Nano equivalent may be about 0.6 to 1.0%, and in some cases about 1.2%.
本発明の一つの目的は、前記建設省通達の要件口および
ハを充足しない普通ポルトランドセメントを用いた場合
でも、望ましくないアルカリ骨材反応を効果的に抑制で
きる簡便な方法を提供することである。One object of the present invention is to provide a simple method that can effectively suppress undesirable alkali aggregate reactions even when using ordinary Portland cement that does not meet the requirements (1) and (3) of the Ministry of Construction notification. .
また１問題のアルカリ骨材反応は、用いる骨材の種類に
大きく依存する。そのため、前記の建設省通達では、骨
材のアルカリとの反応性を予め試験し、試験の結果安全
と認められた骨材の使用が望ましいとしている。Also, the alkaline aggregate reaction, which is a problem, is highly dependent on the type of aggregate used. Therefore, the above-mentioned Ministry of Construction notification states that it is desirable to test the reactivity of aggregate with alkali in advance and to use aggregate that is recognized as safe as a result of the test.
本発明の今一つの目的は、アルカリとの反応性が高い骨
材を用いた場合でも、望ましくないアルカリ骨材反応を
効果的に抑制できる方法を提供することである。Another object of the present invention is to provide a method that can effectively suppress undesirable alkali aggregate reactions even when aggregates highly reactive with alkali are used.
前記の目的を達成する本発明方法は２モルタルまたはコ
ンクリート配合物中に系中のアルカリと骨材とのアルカ
リ骨材反応を抑制するに充分な量の焼成モンモリロナイ
トを配合することを特徴とする。The method of the present invention for achieving the above object is characterized in that calcined montmorillonite is incorporated into the mortar or concrete mix in an amount sufficient to inhibit the alkali-aggregate reaction between the alkali in the system and the aggregate.
以下１本発明の基礎をなす実験およびその結果を記載す
ることにより１本発明方法およびその効果を具体的に説
明する。The method of the present invention and its effects will be specifically explained below by describing the experiments that form the basis of the present invention and their results.
〔使用材料〕 実験には２次の各材料を使用した。[Materials used] The following secondary materials were used in the experiment.
（１）、セメント
普通ポルトランドセメント（日本セメント株式会社製の
「アサノセメントＪ 、 Ｎａｚ Ｏ当Ｎ ： ０．６
％）
（２）、骨材Ａ
豊島産安山岩
粒度分布
粒度 重量％
０．１５〜０．６ ｍｍ ２０％０．６〜２．５
ｍｍ ５０％
２．５〜５．０ ｍｍ ３０％
（３）、骨材Ｂ
豊浦標準砂
（４）、水
東京都調布市上水道水の蒸留水
（５）。水酸化ナトリウム
特級試薬
（６）、添加剤
焼成モンモリロナイト
山形県産のモンモリロン石を１２００℃の温度で約１時
間焼成し、空冷したもの
（粒度０．ＯＯ１〜０．０２ ｍｍ）
〔モルタル配合〕
１回に練り混ぜたセメント、骨材および水の量は２次の
とおりであった。(1) Cement Ordinary Portland cement (Nippon Cement Co., Ltd.'s "Asano Cement J", Naz Ot N: 0.6
%) (2), Aggregate A Andesite from Teshima Particle size distribution Particle size Weight % 0.15-0.6 mm 20% 0.6-2.5
mm 50% 2.5-5.0 mm 30% (3), Aggregate B Toyoura standard sand (4), Water Distilled water from Chofu city tap water, Tokyo (5). Sodium hydroxide special grade reagent (6), additive calcined montmorillonite Montmorillonite from Yamagata Prefecture is calcined at a temperature of 1200°C for about 1 hour and air cooled (particle size 0.OO1 to 0.02 mm) [Mortar composition] 1 The amounts of cement, aggregate, and water mixed at each time were as follows.
セメント ６００ ｇ骨材Ａ
６００ ｇ骨材Ｂ
６００ ｇ水酸化ナトリウム水溶液 ３
００ｍｊ！ただし、水酸化ナトリウム水溶液の量は２モ
ルタル中のアルカリ量がＮａｇ Ｏ換算でセメントに基
づき２．５重量％となるよ・うに調節した。Cement 600g Aggregate A
600g aggregate B
600 g Sodium hydroxide aqueous solution 3
00mj! However, the amount of the aqueous sodium hydroxide solution was adjusted so that the amount of alkali in the two mortars was 2.5% by weight based on the cement in terms of Nag O.
モルタルの混練は、 ＪＩＳ Ｒ５２０１９，１，１が
規定する混練機を使用し１次の要領で行った。すなわち
、練りばちおよびパドルを混合位置に固定し。The mortar was kneaded using a kneader specified by JIS R52019, 1, 1 in the following manner. That is, the kneading pin and paddle are fixed in the mixing position.
前記の量のセメント、骨材（ＡおよびＢ）並びにセメン
トに基づき０．２．５または５．０重量％の添加剤（焼
成モンモリロナイト）を入れて混練機を始動し、パドル
を回転させながら、３０秒間空練りした。次いで、混練
機を停止して前記の量の水酸化ナトリウム水溶液を入れ
た後、混練機を３０秒間駆動し、そして２０秒間休止し
た。この休止の間に。Start the kneader with the above amounts of cement, aggregates (A and B) and 0.2.5 or 5.0% by weight of additive (calcined montmorillonite) based on the cement, and while rotating the paddle, I kneaded it for 30 seconds. Next, the kneader was stopped and the above amount of aqueous sodium hydroxide solution was added, and the kneader was driven for 30 seconds and then stopped for 20 seconds. During this hiatus.
さじ、練りばちおよびパドルに付着したモルタルをかき
落した。さらに練りはちの底のモルタルをかき上げるよ
うに、混練機の３０秒間駆動および２０秒間休止のサイ
クルを３回反復した。最後の休止が終わった後、１２０
秒間練り混ぜた。得られたモルタルは、直ちに成形に付
した。The mortar adhering to the spoon, kneading drum, and paddle was scraped off. Furthermore, a cycle of driving the kneading machine for 30 seconds and resting it for 20 seconds was repeated three times so as to scrape up the mortar at the bottom of the kneading chimney. After the last pause, 120
Mixed for a second. The obtained mortar was immediately subjected to molding.
〔型枠〕
ＪＩＳ Ｒ５０２１９，１，２が規定する４０ Ｘ ４
０ Ｘ １６０ｍｍの３連型枠で１両端に長さ変化測定
用のゲージプラグを埋め込めるよう、ゲージプラグ固定
用の穴をあけたものを使用した。[Formwork] 40 x 4 specified by JIS R50219, 1, 2
A triple formwork measuring 0 x 160 mm was used, with holes for fixing gauge plugs drilled at both ends of the frame so that gauge plugs for measuring length changes could be embedded.
前記型枠の高さの約１７２までモルタルを詰め。 Fill the formwork with mortar to a height of approximately 172 cm.
突き棒を用いて、全面にわたって突きかためた。The whole surface was tamped down using a ramming stick.
次いで、型枠の上端までモルタルを詰め、同様にして突
き棒で突き、最後に残りのモルタルを約５ｍｍ盛り上げ
た。Next, the mold was filled with mortar up to the upper end, and poked in the same manner with a push rod, and finally the remaining mortar was raised to a height of about 5 mm.
モルタル打設後、型枠ごと２０℃、相対湿度１００％の
雰囲気で２４時間養生した後、脱型した。脱型した供試
体は、２０℃の水中に浸漬して２４時間水中養生した。After placing the mortar, the mold was cured for 24 hours in an atmosphere of 20° C. and 100% relative humidity, and then removed from the mold. The demolded specimen was immersed in water at 20°C and cured in water for 24 hours.
水中から取り出した供試体は、長手方向の端を下にして
立てておき、４０℃の温度で水蒸気養生した。The specimen taken out of the water was placed upright with its longitudinal end facing down, and steam-cured at a temperature of 40°C.
測定の材令（前記の水蒸気養生に付した期間）は、０ケ
月、０．５ケ月、１ケ月、２ケ月、３ケ月。The age of the material to be measured (the period of steam curing mentioned above) is 0 months, 0.5 months, 1 month, 2 months, and 3 months.
４ケ月、５ケ月および６ケ月であった。They were 4 months, 5 months and 6 months.
各測定材令に達した供試体は、２０℃、相対湿度１００
％の雰囲気で１６時間保った後、その長さくゲージプラ
グ内側端面間の距離）を測定し、そしてその測定値と当
初の（材令０ケ月における長さの測定値とから、当該材
令における長さの変化率（膨張量）を算出した。The specimens that reached each measurement material standard were kept at 20℃ and relative humidity 100℃.
After keeping it in an atmosphere of The rate of change in length (amount of expansion) was calculated.
得られた結果を第１表に示す。示した膨張量は。The results obtained are shown in Table 1. The amount of expansion shown is.
３連型枠を用いて、同一のモルタルから同時に作成し、
同一条件下で養生した同一材令の３本の供試体について
得た値の平均値である。Created simultaneously from the same mortar using three formworks,
This is the average value obtained for three specimens of the same age that were cured under the same conditions.
第１図は、第１表の結果を示したグラフである。FIG. 1 is a graph showing the results of Table 1.
第１図において、各曲線は９モルタルバーの膨張量の経
時変化を示し１曲線Ｃは焼成モンモリロナイト無添加の
場合に、そして曲線ＡおよびＢはそれぞれ焼成モンモリ
ロナイトをセメント当り２．５重量％および５重量％添
加した場合に関する。In FIG. 1, each curve shows the change over time in the amount of expansion of nine mortar bars; curve C is for the case without addition of calcined montmorillonite, and curves A and B are for calcined montmorillonite at 2.5% by weight and 5% by weight per cement, respectively. Regarding the case of adding % by weight.
第１表および第１図に示す実験結果によれば。According to the experimental results shown in Table 1 and FIG.
焼成モンモリロナイト無添加の場合には、試験したモル
タルの膨張量は、３ケ月で０．０８８％そして６ケ月で
０．１０６％である。これに対し、焼成モンモリロナイ
トをセメント当り２．５重量％および５重量％添加した
場合には、膨張量が３ケ月でそれぞれ０．０４４％およ
び０．０２７％そして６ケ月でそれぞれ０．０５４％お
よび０．０３３％となり、焼成モンモリロナイトの添加
量が増すにつれ膨張量は小さくなることが判る。これは
、焼成モンモリロナイトの添加により９モルタルまたは
コンクリートにおけるアルカリ骨材反応を実質的に抑制
できることを意味する。Without the addition of calcined montmorillonite, the expansion of the mortar tested was 0.088% after 3 months and 0.106% after 6 months. On the other hand, when calcined montmorillonite was added at 2.5% and 5% by weight per cement, the expansion amount was 0.044% and 0.027%, respectively, after 3 months, and 0.054% and 0.054%, respectively, after 6 months. It is found that the amount of expansion decreases as the amount of calcined montmorillonite increases. This means that the addition of calcined montmorillonite can substantially suppress alkaline aggregate reactions in mortar or concrete.
本発明の実施に使用できる焼成モンモリロナイトは、た
とえば、モンモリロン石、マグネシアンモンモリロン石
、テツモンモリロン石、テツマグネシアンモンモリロン
石、バイデライト、アルミニアンバイデライト、ノント
ロン石、アルミニアンノントロン石、サポー石、アルミ
ニアンサポー石、ヘクトライト、ソーコナイトおよびポ
ルコンスファイトのようなモンモリロン石群鉱物を１０
００℃以上、好ましくは１２００〜１４００℃の温度で
焼成し。Calcined montmorillonites that can be used in the practice of the present invention include, for example, montmorillonite, magnesian-montmorillonite, tetsu-magnesian-montmorillonite, tetsu-magnesian-montmorillonite, beidellite, aluminium-beidellite, nontronite, aluminian-nontronite, sapoite. 10 montmorillonite group minerals such as aluminian saporite, hectorite, sauconite and porconsuphite.
Calcinate at a temperature of 00°C or higher, preferably 1200 to 1400°C.
そして急冷することにより製造できる。急冷は。It can be manufactured by rapid cooling. Rapid cooling.
空冷することにより行うのが好都合である。必要なら、
急冷後破砕する。This is conveniently carried out by air cooling. If necessary,
Crush after quenching.
既述の如く、アルカリ骨材反応は、使用するセメントの
アルカリ量および使用する骨材の種類に大きく依存する
ので１本発明方法の実施に当たっては１モルタルまたは
コンクリート配合物に添加すべき焼成モンモリロナイト
の適量を予め試験によって決定するのがよい。すなわち
、焼成モンモリロナイトの添加量をいろいろ変えてモル
タルバー法の試験を行った結果、膨張量が規定量以下（
３ケ月で０．０５％以下でかつ６ケ月で０．１％以下）
であった場合、その場合の添加量を焼成モンモリロナイ
トの適量とするのである。As mentioned above, the alkaline aggregate reaction greatly depends on the amount of alkali in the cement used and the type of aggregate used. Therefore, when carrying out the method of the present invention, the amount of calcined montmorillonite to be added to the mortar or concrete mixture is It is best to determine the appropriate amount in advance by testing. In other words, as a result of testing the mortar bar method with various amounts of calcined montmorillonite added, the amount of expansion was below the specified amount (
0.05% or less for 3 months and 0.1% or less for 6 months)
If so, the amount added in that case is determined to be the appropriate amount of calcined montmorillonite.
焼成モンモリロナイトの添加混合は２通常行われている
モルタルまたはコンクリートの混合と同様にして行える
。すなわち、焼成モンモリロナイトをセメントおよび骨
材と、コンクリートミキサー中で空練りすることにより
混合できる。Addition and mixing of calcined montmorillonite can be carried out in the same manner as in the conventional mixing of mortar or concrete. That is, calcined montmorillonite can be mixed with cement and aggregate by dry mixing in a concrete mixer.
本発明にしたがい、適量の焼成モンモリロナイトをモル
タルまたはコンクリート配合物に添加するなら２モルタ
ルまたはコンクリート構造物におけるアルカリ骨材反応
を効果的に抑制でき、前記建設省通達の要件イ９９ロ、
ハよび二が満たされない場合でも、構造物の膨張および
劣化を回避または少なくとも実質的に低減でき、安全な
モルタルまたはコンクリート施工が可能である。According to the present invention, if an appropriate amount of calcined montmorillonite is added to the mortar or concrete mix, the alkali aggregate reaction in mortar or concrete structures can be effectively suppressed, meeting the requirements of the Ministry of Construction Circular 99B.
Even if conditions (C) and (2) are not satisfied, expansion and deterioration of the structure can be avoided or at least substantially reduced, and safe mortar or concrete construction is possible.
焼成モンモリロナイトがアルカリ骨材反応を抑制する作
用機構は、まだ完全には解明されていないが、焼成モン
モリロナイトが系中のアルカリと優先的に反応し、その
結果アルカリ骨材反応が抑制されるのであろうと思われ
る。Although the mechanism by which calcined montmorillonite suppresses alkali aggregate reactions is not yet completely understood, it is believed that calcined montmorillonite reacts preferentially with alkalis in the system, and as a result, alkali aggregate reactions are suppressed. I think I'm deaf.
第１図はモルタルバーの膨張量の経時変化を示すグラフ
。FIG. 1 is a graph showing changes over time in the amount of expansion of a mortar bar.
Claims (1)
と骨材とのアルカリ骨材反応を抑制するに充分な量の焼
成モンモリロナイトを配合することを特徴とするアルカ
リ骨材反応を抑制する方法。A method for suppressing an alkali-aggregate reaction, comprising incorporating calcined montmorillonite into a mortar or concrete mixture in an amount sufficient to suppress the alkali-aggregate reaction between the alkali in the system and the aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26350286A JPS63117939A (en) | 1986-11-05 | 1986-11-05 | Inhibition of alkali aggregate ra reaction using burnt montmorillonite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26350286A JPS63117939A (en) | 1986-11-05 | 1986-11-05 | Inhibition of alkali aggregate ra reaction using burnt montmorillonite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63117939A true JPS63117939A (en) | 1988-05-21 |
Family
ID=17390417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26350286A Pending JPS63117939A (en) | 1986-11-05 | 1986-11-05 | Inhibition of alkali aggregate ra reaction using burnt montmorillonite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63117939A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435846A (en) * | 1991-08-05 | 1995-07-25 | Nippon Chemical Industrial Co., Ltd. | Cement-additive for inhibiting concrete-deterioration |
| EP0846088A4 (en) * | 1995-08-25 | 1998-12-23 | James Hardie Res Pty Ltd | Cement formulation |
| JP2014136665A (en) * | 2013-01-17 | 2014-07-28 | Akio Maru | Expansion suppressing material, concrete and method of suppressing expansion of concrete |
-
1986
- 1986-11-05 JP JP26350286A patent/JPS63117939A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435846A (en) * | 1991-08-05 | 1995-07-25 | Nippon Chemical Industrial Co., Ltd. | Cement-additive for inhibiting concrete-deterioration |
| EP0846088A4 (en) * | 1995-08-25 | 1998-12-23 | James Hardie Res Pty Ltd | Cement formulation |
| JP2014136665A (en) * | 2013-01-17 | 2014-07-28 | Akio Maru | Expansion suppressing material, concrete and method of suppressing expansion of concrete |
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