JPH0222159A - Concrete deterioration suppressing composition - Google Patents
Concrete deterioration suppressing compositionInfo
- Publication number
- JPH0222159A JPH0222159A JP17243088A JP17243088A JPH0222159A JP H0222159 A JPH0222159 A JP H0222159A JP 17243088 A JP17243088 A JP 17243088A JP 17243088 A JP17243088 A JP 17243088A JP H0222159 A JPH0222159 A JP H0222159A
- Authority
- JP
- Japan
- Prior art keywords
- carboxylic acid
- concrete
- composition
- unsaturated
- deterioration
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 230000006866 deterioration Effects 0.000 title claims abstract description 32
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims abstract description 8
- 239000011398 Portland cement Substances 0.000 claims abstract description 8
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001530 fumaric acid Substances 0.000 claims abstract description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 3
- 239000011976 maleic acid Substances 0.000 claims abstract description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract 9
- 230000002401 inhibitory effect Effects 0.000 claims description 10
- 150000001991 dicarboxylic acids Chemical class 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- -1 alkali metal salt Chemical class 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 16
- 239000000395 magnesium oxide Substances 0.000 abstract description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 238000010828 elution Methods 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003449 preventive effect Effects 0.000 abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000920 calcium hydroxide Substances 0.000 abstract description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 2
- 230000000750 progressive effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000001588 bifunctional effect Effects 0.000 abstract 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 235000011116 calcium hydroxide Nutrition 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000013078 crystal Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 239000011575 calcium Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000011041 water permeability test Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000002062 proliferating effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
この発明は、コンクリート劣化抑止組成物に関するもの
である。さらに詳しくは、この発明は、コンクリートの
中性化、塩害、凍害、アルカリ骨材反応、さらには漏水
や応力変化によるクラック発生などによるコンクリート
の劣化を効果的に抑止することのできる結晶増殖剤に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) This invention relates to a concrete deterioration inhibiting composition. More specifically, the present invention relates to a crystal growth agent that can effectively suppress concrete deterioration caused by neutralization of concrete, salt damage, freezing damage, alkaline aggregate reaction, and cracking caused by water leakage and stress changes. It is something.
く背景技術）
従来、コンクリートについては、様々な劣化が知られて
おり、その劣化の要因に対しての対策も古くから検討さ
れてきている。このような要因としては、コンクリート
の空隙に浸入する空気中の炭酸ガスによってコンクリー
トがアルカリ性を失い中性化（炭酸化）し、これにとも
なって水、酸素、炭酸ガスによって秩筋、鉄骨は発錆し
、腐蝕することや、海水によるコンクリートの化学的損
傷、コンクリート空隙内の水分の凍結による凍害、セメ
ント中のアルカリが、空隙内の水によってアルカリ−骨
材反応を起こし、コンクリートの損傷をもたらすこと、
さらにはコンクリートの応力変動などによって生じたク
ラックと、このクラックの生成による漏水を契機とする
コンクリートの損傷などが知られている。Background Art) Concrete has been known to suffer from various types of deterioration, and countermeasures against the causes of this deterioration have been studied for a long time. This is because concrete loses its alkalinity and becomes neutral (carbonated) due to carbon dioxide gas in the air that enters the voids in the concrete. Rust and corrosion, chemical damage to concrete by seawater, freezing damage due to freezing of moisture in concrete voids, alkali in cement causing alkali-aggregate reaction with water in voids, resulting in damage to concrete. thing,
Furthermore, it is known that cracks occur due to stress fluctuations in concrete, and damage to concrete is caused by water leakage caused by the cracks.
コンクリートの劣化要因への対応については、コンクリ
ートを形成するセメント組成の変更や、モルタル急硬剤
などを用いての応急措置などが知られているが、その劣
化の要因が多岐にわたることもあり、様々な劣化要因に
ついてほぼ共通して対処することのできる方策はこれま
でに知られていない。Measures to address the causes of concrete deterioration include changing the composition of the cement that forms concrete and using mortar hardening agents as temporary measures, but there are many causes of deterioration, so To date, no measures have been known that can almost universally deal with various deterioration factors.
また、特に、これまでのコンクリート劣化への対処につ
いては、セメント組成の調整による場合には事前の予防
措置としである程度の効果はあるものの、発生し、拡大
している劣化に対してはその劣化抑止の効果は全く期待
できないという重大な問題があった。逆にモルタル急硬
剤などの場合には応急的にクラックの充填などは可能で
あるものの、さらに進行する劣化に対しては全く無力で
あり、常にコンクリート劣化による損傷を後付けで修復
することができるにとどまっている。In particular, with regard to the measures taken to date to deal with concrete deterioration, adjusting the composition of cement is effective to some extent as a preventive measure; There was a serious problem in that the deterrence effect could not be expected at all. Conversely, in the case of mortar hardening agents, it is possible to temporarily fill cracks, but it is completely powerless against further deterioration, and damage caused by concrete deterioration can always be repaired later. remains.
進行するコンクリートの劣化に対しても効果的な方策は
、これまでには全く知られていないのが実状である。The reality is that no effective measures against the progressing deterioration of concrete are known so far.
（発明の目的）
この発明は、以上の通りの事情に鑑みてなされたもので
あり、従来方法のような欠点のない、予防措置としても
、また進行する劣化に対しても効果的に作用することの
できるコンクリート劣化抑止組成物を提供することを目
的としている。(Objective of the Invention) This invention has been made in view of the above-mentioned circumstances, and is effective as a preventive measure and against progressive deterioration, without the drawbacks of conventional methods. The purpose of the present invention is to provide a concrete deterioration inhibiting composition that can inhibit concrete deterioration.
（発明の開示）
この発明のコンクリート劣化抑止組成物は、上記の目的
を実現するために、２０〜４０％ＣａＯおよび１０〜２
５％５１０２を含有するポルトランドセメント系組成物
において、１０〜２５％ＭｇＯとともに不飽和２価カル
ボン酸を含有することを特徴としている。(Disclosure of the Invention) In order to achieve the above object, the concrete deterioration inhibiting composition of the present invention contains 20 to 40% CaO and 10 to 2% CaO.
A Portland cement composition containing 5% 5102 is characterized by containing an unsaturated dihydric carboxylic acid along with 10 to 25% MgO.
この発明の組成物は、コンクリートの組成を完全に深部
まで緻密化する結晶生成作用を有しているもので、この
結晶生成作用に欠かせないのが、マグネシアと不飽和２
価カルボン酸である。The composition of this invention has a crystallization effect that completely densifies the composition of concrete to its depths, and magnesia and unsaturated
It is a carboxylic acid.
コンクリートの組成とその特徴についてみると、通常、
コンクリートは、セメント硬化ペーストと骨材とから構
成されており、セメント硬化ペーストは、未水和セメン
ト粒子、酸化カルシウム−シリカ−水系のゲル、水酸化
カルシウム、トリサルフェート、モノサルフェートとか
ら本質的に構成されている。When looking at the composition of concrete and its characteristics, it is usually found that
Concrete is composed of cement hardening paste and aggregate, and cement hardening paste consists essentially of unhydrated cement particles, calcium oxide-silica-water based gel, calcium hydroxide, trisulfate, monosulfate. It is configured.
コンクリート組成としてみた場合には、微細構造として
結晶性セメントゲル（約５０％）、Ｃａ（ｏＨ）２ （
約２５％）および空隙・細孔（約２５％）を有し、この
うちのＣａ （ＯＨ） ２は、毛細管状の細孔に析出し
ている。この毛細管、さらには内部応力や荷重増加によ
る微細なりラック、気泡やブリーディングの水みち等に
よる空隙や細孔は、湧水や空気、炭酸ガスなどの浸入を
許し、コンクリートの損傷、劣化の原因となる反応を起
こす。When viewed as a concrete composition, the microstructure consists of crystalline cement gel (approximately 50%), Ca(oH)2 (
(approximately 25%) and voids/pores (approximately 25%), of which Ca (OH) 2 is precipitated in capillary-like pores. These capillaries, as well as fine racks due to internal stress and load increases, and voids and pores caused by air bubbles and bleeding water channels allow spring water, air, carbon dioxide, etc. to enter, causing damage and deterioration of concrete. cause a reaction.
湧水があると、空隙や細孔に浸入した水は、これら空隙
や細孔を通じ漏水をはじめるばかりか、空隙や細孔に析
出しているＣ ａ （ＯＨ） ２を溶解し、劣化反応生
成物に変えていく。たとえば、炭酸ガスとの反応により
炭酸カルシウムの生成、コンクリートの中性化、アルカ
リ−骨材反応の促進、塩害、あるいは凍害の誘発などが
起こる。中性化あるいは塩害によって、鉄筋は発錆し、
腐蝕していく。When there is spring water, the water that has entered the voids and pores not only begins to leak through these voids and pores, but also dissolves Ca (OH) 2 precipitated in the voids and pores, causing deterioration reaction formation. Turn it into something. For example, reactions with carbon dioxide gas may produce calcium carbonate, neutralize concrete, accelerate alkali-aggregate reactions, and induce salt damage or frost damage. Reinforcing bars rust due to carbonation or salt damage,
It corrodes.
この発明の結晶増殖作用を有する組成物は、このＣａ
（ＯＨ） ２の溶出と、劣化反応物質への変化を抑制す
るものと考えられる。The composition having a crystal growth effect of this invention has this Ca
It is thought that this suppresses the elution of (OH) 2 and its transformation into deterioration reactants.
この発明の組成物は、このＣａ （ＯＨ） ２の溶出お
よび劣化反応物質への変化を、不飽和２価カルボン酸の
Ｃａとの反応やＭｇＯとカルボン酸およびＣａとの反応
などによって複合的に抑止するものと推定される。この
場合、上記した通り、この発明のコンクリート劣化抑止
組成物は、２０〜４０％ＣａＯ１１０〜２５％Ｓ ］
０２ 、さらにＭｇｏを１０〜２５％の範囲で含有し、
しかも不飽和２価カルボン酸を含有していることが必要
である。これらの主構成成分には、さらに通常のポルト
ランドセメントに含まれているＡｌ２Ｏ３、Ｆｅ Ｏ
、Ｎａ、、Ｏなどの他の鉱物質を含有することができる
。The composition of the present invention prevents the elution of Ca (OH) 2 and its transformation into a deterioration reactant by complexing the reaction of unsaturated dicarboxylic acid with Ca or the reaction of MgO with carboxylic acid and Ca. It is presumed that this will deter. In this case, as described above, the concrete deterioration inhibiting composition of the present invention contains 20 to 40% CaO, 110 to 25% S]
02, further containing Mgo in a range of 10 to 25%,
Moreover, it is necessary to contain an unsaturated dihydric carboxylic acid. These main components include Al2O3 and FeO, which are contained in ordinary Portland cement.
, Na, ,O, etc. may be included.
この発明の組成物を構成するポルトランドセメント系組
成物は、標準的なポルトランドセメントと比較すると、
ＣａＯの含有量は小さく、ＭｇＯ含有量が大きいことが
特徴である。The portland cement-based composition that makes up the composition of this invention has, when compared to standard portland cement,
It is characterized by a low content of CaO and a high content of MgO.
Ａｌ２Ｏ３は２％以下、Ｎ ａ ２０は２〜８％、Ｆｅ
２Ｏ３は３〜５％程度の含有量とするのが好ましい。Al2O3 is 2% or less, Na20 is 2-8%, Fe
The content of 2O3 is preferably about 3 to 5%.
不飽和２価カルボン酸は、炭素数２〜５程度の２価カル
ボン酸を用いることができ、特に好適なものとしては、
フマル酸、またはマレイン酸を例示することができる。As the unsaturated divalent carboxylic acid, a divalent carboxylic acid having about 2 to 5 carbon atoms can be used, and particularly preferred ones include:
Examples include fumaric acid and maleic acid.
この発明の組成物について重要なことは、この組成物は
コンクリートの細孔や空隙に水分との反応によって浸透
して結晶を成長させ、この不溶性結晶の増殖によってコ
ンクリートの劣化を抑止することである。この増殖反応
は水によって進行し、しかも反応は複合的に進むことで
ある。生成する結晶は絡み合うように凝集してコンクリ
ートの空隙を埋めていく、増殖するこの結晶は、セメン
トの硬化体組織と類似の３ＣａＯ・２ Ｓ ｉｏ ２３
Ｈ，、Ｏをも含むものであり、コンクリート躯体の存在
する限り、恒久的に存在し、劣化の防止、修復、および
止水の効果を示す。What is important about the composition of this invention is that it penetrates into the pores and voids of concrete by reacting with moisture to grow crystals, and the proliferation of these insoluble crystals inhibits the deterioration of concrete. . This multiplication reaction proceeds with water, and the reaction proceeds in a complex manner. The crystals that are generated cohere in an intertwined manner and fill the voids in the concrete. These proliferating crystals are 3CaO・2S io 23, which is similar to the hardened structure of cement.
It also contains H, and O, and exists permanently as long as the concrete structure exists, and exhibits the effects of preventing deterioration, repairing, and stopping water.
さらにまた、何らかの原因によりクラックが発生しても
、直ちに結晶化反応が再開され、自動的にクラックを結
晶によって充填してしまう、たとえば、トンネルのＮＡ
ＴＭ工法に用いる支保材のロックボルトとコンクリート
の接合打の隙間に対しても、緻密化してしまう。Furthermore, even if a crack occurs for some reason, the crystallization reaction is immediately restarted and the crack is automatically filled with crystals.
The gaps between the rock bolts used in the TM construction method and the concrete joints also become denser.
この発明の組成物の適用による結晶の生成、緻密化によ
りコンクリート躯体の物理的強度も増大する。The physical strength of the concrete structure also increases due to the formation and densification of crystals by application of the composition of the present invention.
この発明のコンクリート劣化抑止組成物の施工の方法に
は格別の限定はない。塗布、吹付け、ドリル工法、など
様々可能である。There are no particular limitations on the method of applying the concrete deterioration inhibiting composition of the present invention. Various methods are possible, including coating, spraying, and drilling methods.
また、この発明の組成物は、ポルトランドセメント系組
成物の配合を調整し、ＭｇＯ２不飽和２価カルボン酸の
添加によって容易に製造することができる。Furthermore, the composition of the present invention can be easily produced by adjusting the formulation of the Portland cement composition and adding MgO2 unsaturated dihydric carboxylic acid.
この発明の組成物の特徴である結晶の自動増殖性および
結晶反応自動追従性によって、コンクリートの中性化、
塩害、凍害、アルカリ−骨材反応、漏水などに対して効
果的に抑止効果を実現する。Due to the automatic growth of crystals and the ability to automatically follow crystal reactions, which are the characteristics of the composition of this invention, concrete can be neutralized,
Effectively suppresses salt damage, frost damage, alkali-aggregate reaction, water leakage, etc.
次に実施例として、この発明の組成物の作用について説
明する。この発明の、優れた止水効果、およびコンクリ
ートの強化改善の効果が明らかになる。Next, as an example, the effect of the composition of the present invention will be explained. The excellent water-stopping effect and the effect of improving the reinforcement of concrete of this invention are revealed.
もちろん、この発明は、これらの例によって限定される
ものではない。Of course, the invention is not limited to these examples.
実施例
（１） 通常のコンクリートブロック壁（厚さ２０α）
の片面に、次の配合からなる組成物と水と の混合物を
塗布した。Example (1) Ordinary concrete block wall (thickness 20α)
A mixture of water and a composition having the following formulation was applied to one side of the sample.
ＣａＯ３０，９％
５ｉｎ２ ２０．３％
ＭｇＯ１９，４％
ＡＩ、０３ １．６８％
Ｆｅ２ｏ３ ３．９６％
Ｎ ａ２０ ５ 、０１％に２０
０．１５％
ＭｎＯ０，０５％
ＮｉＯ０，１１％
ＴｌＯ２０−１８％
ＳＯ３０，９７％
フマル酸 ７．８５％
その＠鉱物質（残部）
この塗布後、６日間放置した。CaO30.9% 5in2 20.3% MgO19.4% AI, 03 1.68% Fe2o3 3.96% Na20 5, 20 to 01%
0.15% MnO 0.05% NiO 0.11% TlO 20-18% SO3 0.97% Fumaric acid 7.85% Mineral material (remainder) After this application, it was left for 6 days.
反対面の未処理面の細孔より、針状結晶が群がって外部
へ成長するのが確認された。この不溶性結晶の生成によ
って、完全な止水効果が得られた。It was confirmed that needle-shaped crystals clustered and grew outward from the pores on the opposite untreated surface. The formation of these insoluble crystals provided a complete water-stopping effect.
（２） 同様にφ１０ＣＩ＋×１０ＣＩ１１のコンクリ
ートについて透水試験を行なった。また、φ１０×２０
■のコンクリートの全面に組成物を塗布して圧縮強度試
験を行なった。(2) Similarly, a water permeability test was conducted on concrete of φ10CI+×10CI11. Also, φ10×20
A compressive strength test was conducted by applying the composition to the entire surface of the concrete in (2).
透水試験では、透水圧５ｋｔ／−の場合、加圧１２０時
間後の透水量はＯであった。これに対して、塗布しない
場合の透水量は１５．９ｍｌであった。In the water permeability test, when the water permeation pressure was 5 kt/-, the water permeation amount after 120 hours of pressurization was O. On the other hand, the water permeation amount when no coating was applied was 15.9 ml.
また、圧縮強度は、２９５ ｋｇ ｆ ／ ｃｌ（Ｎ／
＋ｍ”）であった。塗布しない場合には、２８５ ｋｇ
ｆ ／ ｃｉ （Ｎ ／ ｌｔｘ＋ ２）であった。In addition, the compressive strength is 295 kg f/cl (N/
+m”).If not applied, 285 kg
f/ci (N/ltx+2).
この発明の組成物は、極めて優れた効果を奏するもので
あることがわかる。It can be seen that the composition of this invention exhibits extremely excellent effects.
Claims (5)
２を含有するポルトランドセメント系組成物において、
１０〜２５％ＭｇＯとともに不飽和２価カルボン酸を含
有することを特徴とするコンクリート劣化抑止組成物。(1) 20-40% CaO and 10-25% SiO_
In a Portland cement composition containing 2,
A concrete deterioration inhibiting composition characterized by containing 10 to 25% MgO and an unsaturated divalent carboxylic acid.
（１）記載のコンクリート劣化抑止組成物。(2) The concrete deterioration inhibiting composition according to claim (1), which contains 2 to 8% of unsaturated divalent carboxylic acid.
を含有する請求項（１）記載のコンクリート劣化抑止組
成物。(3) 2% or less Al_2O_3 and 2-8% Na_2O
The concrete deterioration inhibiting composition according to claim (1), comprising:
酸である請求項（１）記載のコンクリート劣化抑止組成
物。(4) The concrete deterioration inhibiting composition according to claim (1), wherein the unsaturated dicarboxylic acid is fumaric acid or maleic acid.
有している請求項（１）記載のコンクリート劣化抑止組
成物。(5) The concrete deterioration inhibiting composition according to claim (1), which contains an unsaturated dicarboxylic acid as an alkali metal salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17243088A JP2694190B2 (en) | 1988-07-11 | 1988-07-11 | Concrete deterioration inhibiting composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17243088A JP2694190B2 (en) | 1988-07-11 | 1988-07-11 | Concrete deterioration inhibiting composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0222159A true JPH0222159A (en) | 1990-01-25 |
| JP2694190B2 JP2694190B2 (en) | 1997-12-24 |
Family
ID=15941828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17243088A Expired - Lifetime JP2694190B2 (en) | 1988-07-11 | 1988-07-11 | Concrete deterioration inhibiting composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2694190B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095715A (en) * | 2001-09-20 | 2003-04-03 | Sintokogio Ltd | Aggregate for hardened cement, and hardened cement |
| JP2005060165A (en) * | 2003-08-12 | 2005-03-10 | Akushisu:Kk | Admixture for concrete, concrete material, concrete structure, method for constructing concrete structure, and method for preventing deterioration of concrete structure |
| JP2007169144A (en) * | 2005-11-04 | 2007-07-05 | Tokuyama Corp | Alkalinity reducing agent |
| JP4931817B2 (en) * | 2005-08-15 | 2012-05-16 | 河淳株式会社 | Product advancement tool |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001294461A (en) * | 2000-04-12 | 2001-10-23 | Okayama Xypex Kk | Concrete modifier |
-
1988
- 1988-07-11 JP JP17243088A patent/JP2694190B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095715A (en) * | 2001-09-20 | 2003-04-03 | Sintokogio Ltd | Aggregate for hardened cement, and hardened cement |
| JP2005060165A (en) * | 2003-08-12 | 2005-03-10 | Akushisu:Kk | Admixture for concrete, concrete material, concrete structure, method for constructing concrete structure, and method for preventing deterioration of concrete structure |
| JP4931817B2 (en) * | 2005-08-15 | 2012-05-16 | 河淳株式会社 | Product advancement tool |
| JP2007169144A (en) * | 2005-11-04 | 2007-07-05 | Tokuyama Corp | Alkalinity reducing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2694190B2 (en) | 1997-12-24 |
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