JP2002220271A - Grout composition - Google Patents
Grout compositionInfo
- Publication number
- JP2002220271A JP2002220271A JP2001014999A JP2001014999A JP2002220271A JP 2002220271 A JP2002220271 A JP 2002220271A JP 2001014999 A JP2001014999 A JP 2001014999A JP 2001014999 A JP2001014999 A JP 2001014999A JP 2002220271 A JP2002220271 A JP 2002220271A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- less
- grout
- alumina cement
- grout composition
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土木・建設分野で
使用されるセメント系のグラウト組成物であって、特に
耐酸性を有するグラウト組成物に関する。TECHNICAL FIELD The present invention relates to a cement-based grout composition used in the field of civil engineering and construction, and more particularly to a grout composition having acid resistance.
【０００２】[0002]
【従来技術】グラウト工法は、一般に工法が容易である
ことからコンクリート構造物の細かい空間、トンネルの
履行背面と地山との間隙、鉄筋スリーブ内の空隙、ある
いは逆打ち工法で生じた空隙などの間隙を充填する工法
として、また建築・構造物の補修や補強、ロックアンカ
ーやアースアンカー、機械装置のベースプレート下や軌
道床下などを埋める工法として広く適用されている。グ
ラウト工法に使用するグラウト材は、一般にモルタルや
セメントペースト等の水硬性組成物からなるが、昨今で
は強度や耐久性等を著しく強化した構築体が出現し、こ
のような構築体にグラウト工法を適用する場合、グラウ
ト材もこれに相応する性状のものが要求される。更にか
なり高い施工精度を要求される場合や施工そのものを短
縮することが要求される場合もあり、このような状況に
対応できるようなグラウト材も必要とされている。この
ような要求に応えるべく様々なグラウト材が開発されて
おり、例えば特開平９−２６３４３８では水硬性セメン
トに水を担持させたものを主成分とするグラウト材が、
また特開平１０−９５６５２では高粘性高分子エマルジ
ョンを配合したセメント系グラウト材が知られている。
また、特開平１０−６０４３５で開示されているような
速硬性を著しく高くし、施工期間の短縮を実施したアル
ミン酸カルシウムを主成分とするものも知られている。
また、耐酸性の向上を図ったものでは特開平１０−１５
８０４８に開示の如く超微粒子セメントとポゾランを主
成分としたものが知られてはいるものの、水和反応時に
水酸化カルシウムを生成するため本質的な耐酸性の向上
には限界がある。2. Description of the Related Art The grouting method is generally easy to use because of its small size. It is widely applied as a method for filling gaps, as a method for repairing and reinforcing buildings and structures, and for burying rock anchors and earth anchors, under the base plate of machinery and under the track floor, and the like. The grouting material used for the grouting method is generally composed of a hydraulic composition such as mortar or cement paste.In recent years, structures having significantly enhanced strength and durability have emerged, and the grouting method has been applied to such structures. If applied, the grout material must also be of a corresponding nature. In some cases, a considerably high construction accuracy is required, or the construction itself is required to be shortened. A grout material that can cope with such a situation is also required. Various grouting materials have been developed to meet such demands. For example, in Japanese Patent Application Laid-Open No. 9-263438, a grouting material mainly composed of water-supported hydraulic cement is used.
Japanese Unexamined Patent Publication (Kokai) No. 10-95652 discloses a cement grout material containing a high-viscosity polymer emulsion.
In addition, there is also known a material mainly composed of calcium aluminate, as disclosed in Japanese Patent Application Laid-Open No. H10-60435, which has a remarkably high rapid hardening property and shortens the construction period.
Further, in the case of improving the acid resistance, JP-A-10-15
As disclosed in U.S. Pat. No. 8048, although those containing ultrafine cement and pozzolan as main components are known, there is a limit in the essential improvement in acid resistance due to the generation of calcium hydroxide during the hydration reaction.
【０００３】下水・汚水処理場、化学工場、食品工場な
どではその施設の構築物に特に高い耐酸性が要求される
場合があるが、前記のようなグラウト材では対応が困難
であった。一方、顕著な耐酸性の水硬性組成物として、
水ガラス−珪酸化合物を主成分とするもの（例えば特開
平１０−２１８６４４）、キャスタブル耐火物に使用さ
れているアルミナセメント−耐酸性骨材を主成分とする
ものが知られている。このうち、水ガラス−珪酸化合物
系組成物は、硬化体中に生成するシリカゲルの耐水性が
低く、粘調性も高いため施工性に難があり、更に乾燥脱
水に伴う収縮も大きい。又、アルミナセメント−耐酸性
骨材を主成分とする水硬性組成物は耐酸性に加えて高い
強度発現性も有するものの、硬化中の体積収縮が大き
く、これに伴うひび割れも発生し易く、そのままグラウ
ト材として使用するには無理があった。コンクリート・
モルタル用混和材として市販されている公知の無機系膨
張材を導入すると硬化中の体積収縮はある程度防げるも
のの、耐酸性や強度面を低下させることがあった。In sewage / sewage treatment plants, chemical factories, food factories, and the like, there are cases where particularly high acid resistance is required for the construction of such facilities, but such grout materials have been difficult to cope with. On the other hand, as a remarkable acid-resistant hydraulic composition,
There are known those containing water glass-silicate compound as a main component (for example, JP-A-10-218644), and those containing alumina cement used in castable refractories and acid-resistant aggregate as a main component. Among them, the water glass-silicate compound-based composition has difficulty in workability due to low water resistance and high viscosity of silica gel generated in the cured product, and further has large shrinkage due to drying and dehydration. In addition, although the hydraulic composition mainly composed of alumina cement and acid-resistant aggregate has high strength in addition to acid resistance, it has a large volume shrinkage during curing, and cracks accompanying it are liable to occur. It was impossible to use it as a grout material. concrete·
When a well-known inorganic expander commercially available as an admixture for mortar is introduced, volume shrinkage during curing can be prevented to some extent, but acid resistance and strength are sometimes reduced.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、高い耐酸性
と強度発現性を有するアルミナセメントと骨材を主成分
とする水硬性組成物をグラウト材として十分適応できる
ようにしたものであって、即ち、高い耐酸性と強度発現
性を喪失させることなく、硬化中の体積収縮を極力無く
し、更に一般のセメント系グラウト材などと遜色無いグ
ラウト工法での施工性が得られるようなグラウト組成物
を提供することを課題とする。An object of the present invention is to provide a hydraulic composition mainly composed of alumina cement and an aggregate having high acid resistance and high strength as a grout material. That is, without losing high acid resistance and strength developability, eliminating the volume shrinkage during curing as much as possible, further grout composition such that the workability in the grouting method comparable to general cement grout material and the like is obtained The task is to provide
【０００５】[0005]
【課題を解決するための手段】本発明者らは、アルミナ
セメントを含有する水硬性組成物の体積減少について慎
重に分析・検討を行った結果、この体積減少は主にアル
ミナセメントの硬化収縮に起因するものであり、アルミ
ナセメント中の一定粒径以下の微粒分の含有重量割合と
アルミナセメント硬化時の体積収縮量が概ね比例関数的
に共に増加することが判明した。また体積収縮量がおよ
そ０．７％を超えると硬化時に明確なひび割れが生じ易
くなることから、水硬性組成物を構成する少なくともア
ルミナセメントと細骨材の比率及びアルミナセメント中
の微粒分の割合を規定すれることによって硬化時の体積
収縮を著しく抑制することができ、加えて水と反応して
膨張性気体を生成する粉粒状物質を配合すると収縮力に
対抗する内圧を硬化体中に発生させることができ、ほぼ
完全にグラウト硬化物の収縮が見られなくなったこと、
更には特定の高分子化合物などの分散剤を配合すること
でグラウト性状を作業性に優れたものに改善できたこと
等の知見を得、本発明を完成するに至った。Means for Solving the Problems The present inventors have carefully analyzed and studied the reduction in volume of a hydraulic composition containing alumina cement, and as a result, the reduction in volume was mainly due to the shrinkage in setting of the alumina cement. It was found that the content ratio by weight of fine particles having a certain particle size or less in the alumina cement and the volume shrinkage amount upon curing of the alumina cement both increased substantially in a proportional function. When the volumetric shrinkage exceeds about 0.7%, a clear crack is easily generated at the time of curing. Therefore, at least the ratio of the alumina cement to the fine aggregate and the ratio of the fine particles in the alumina cement constituting the hydraulic composition. Stipulates that volume shrinkage during curing can be significantly suppressed, and in addition, when a powdery substance that reacts with water to generate an inflatable gas is added, an internal pressure that opposes the shrinkage force is generated in the cured body That almost no shrinkage of the grout hardened material was seen,
Furthermore, the inventor obtained the knowledge that the grout property was improved to be excellent in workability by blending a dispersant such as a specific polymer compound, and the present invention was completed.
【０００６】即ち、本発明は、次の（１）〜（４）で表
す手段によって前記課題の解決を行ったものである。
（１）細骨材及び粒径５μｍ以下の粒子含有率が２５重
量％以下であるアルミナセメントを重量比で細骨材／ア
ルミナセメント＝７０／３０〜４０／６０の割合で含
み、且つ水と反応して膨張性気体を生成する粉粒状物質
を含有してなるグラウト組成物。（２）前記（１）のグ
ラウト組成物に含有される全無機系粒子のうち粒径５μ
ｍ以下の粒子の割合が２５重量％以下であるグラウト組
成物。水硬性組成物に含有される全無機系粒子のうち粒
径５μｍ以下の粒子が２５重量％以下であることを特徴
とする前記（１）のグラウト組成物。（３）水と反応し
て膨張性気体を生成する粉粒状物質がフルイドコークス
である前記（１）又は（２）に記載のグラウト組成物。
（４）ポリエチレングリコール鎖を有するポリカルボン
酸系高分子化合物、低級アルコールアルキレンオキシド
付加物の何れか１種以上を含有する前記（１）〜（３）
の何れかのグラウト組成物。That is, the present invention has solved the above-mentioned problems by means represented by the following (1) to (4).
(1) Fine aggregate and alumina cement having a particle content of 5 μm or less having a particle content of 25% by weight or less are contained in a weight ratio of fine aggregate / alumina cement = 70/30 to 40/60, and water and A grout composition comprising a particulate material that reacts to generate an inflatable gas. (2) A particle size of 5 μm among all the inorganic particles contained in the grout composition of (1).
A grout composition wherein the proportion of particles of m or less is 25% by weight or less. The grout composition according to the above (1), wherein particles having a particle size of 5 μm or less account for 25% by weight or less of all inorganic particles contained in the hydraulic composition. (3) The grout composition according to the above (1) or (2), wherein the powdery or granular substance which reacts with water to generate an inflatable gas is fluid coke.
(4) The above (1) to (3) containing any one or more of a polycarboxylic acid polymer compound having a polyethylene glycol chain and a lower alcohol alkylene oxide adduct.
The grout composition of any one of the above.
【０００７】[0007]
【発明の実施の形態】本発明で用いるアルミナセメント
は、粒径５μｍ以下の粒子の構成割合が２５重量％以
下、好ましくは１５重量％以下のものである限り、特に
限定されない。粒径５μｍ以下の粒子の構成割合が２５
重量％を超えるものを使用すると、硬化収縮の増大をま
ねき、ひび割れが生じ易くなるので好ましくない。BEST MODE FOR CARRYING OUT THE INVENTION The alumina cement used in the present invention is not particularly limited as long as the proportion of particles having a particle size of 5 μm or less is 25% by weight or less, preferably 15% by weight or less. The composition ratio of particles having a particle size of 5 μm or less is 25
It is not preferable to use the one exceeding the weight% because it causes an increase in curing shrinkage and easily causes cracking.
【０００８】本発明で用いる細骨材は、公知細骨材なら
何れの細骨材でも良いが、望ましくは耐酸性の骨材とし
て知られているもの、例えばアルミナ骨材、ムライト骨
材、シャモット骨材、珪石骨材、炭化珪素骨材、更には
アルミナセメントクリンカ骨材等を用いる。尚、本発明
の細骨材とは粒径５ｍｍ以下、好ましくはＦＭ（粗粒
率）が１．５〜３．０程度のものが好ましい。The fine aggregate used in the present invention may be any fine aggregate as long as it is a known fine aggregate. Desirably, those known as acid-resistant aggregates, for example, alumina aggregate, mullite aggregate, chamotte Aggregate, silica stone aggregate, silicon carbide aggregate, and alumina cement clinker aggregate are used. The fine aggregate of the present invention preferably has a particle size of 5 mm or less, and preferably has an FM (coarse particle ratio) of about 1.5 to 3.0.
【０００９】本発明のグラウト組成物は、前記アルミナ
セメントと細骨材を重量比で細骨材／アルミナセメント
＝７０／３０〜４０／６０となるよう含有したものであ
る。この含有割合にすることで、高い耐酸性と強度発現
性が得られることに加え、体積収縮を低減することがで
きる。The grout composition of the present invention contains the above-mentioned alumina cement and fine aggregate in a weight ratio of fine aggregate / alumina cement = 70/30 to 40/60. With this content ratio, high acid resistance and strength development can be obtained, and volume shrinkage can be reduced.
【００１０】また、好ましくは、グラウト組成物中の含
有全無機粒子中の粒径５μｍ以下の粒子含有割合を２５
重量％以下にすると、体積収縮とひび割れ発生をより一
層低減することができる。Preferably, the content ratio of particles having a particle size of 5 μm or less in all the inorganic particles contained in the grout composition is 25%.
When the content is not more than the weight%, the volume shrinkage and the occurrence of cracks can be further reduced.
【００１１】また、本グラウト組成物には、水と反応し
て水硬性物質の水和開始後の収縮力に対抗する圧力を硬
化体内部に付与できる膨張性気体を生成させる粉粒状物
質が含有される。ここで膨張性気体とは、反応物の反応
の結果生成する気体状生成物であって、且つ生成後は反
応系内に存在する物質に対しては反応性に欠く気体状生
成物であって、反応物の体積よりも生成物の体積が少な
くとも増大するものを称する。即ち、このような物質を
含有させると、水和時に組成物内部で生成した膨張性気
体が生成中に硬化の進展に伴って内部に閉じ込められ、
閉じこめられた気体量の増化と共に硬化体内部に強い圧
力が発生し、収縮現象の対抗力となり、収縮変形・ひび
割れをほぼ完全に抑制することができる。このような物
質は、例えば特公昭６０−４１５０に開示されているよ
うな石油化学の副産物であるフルイドコークス等の炭素
系化合物を加熱処理して得られる粒状物質などが好適で
ある。本発明での当該物質の配合量は、アルミナセメン
ト１００重量部に対し、０．１〜１５重量部とする。
０．１重量部未満では所望の内圧が得られず、また１５
重量部を超えると過度の膨張変形を生じることがあるの
で何れも好ましくない。The grout composition contains a powdery or granular substance which reacts with water to generate an inflatable gas capable of applying a pressure against the contraction force after the hydration of the hydraulic substance has started to the inside of the cured product. Is done. Here, the expansive gas is a gaseous product generated as a result of the reaction of the reactants, and is a gaseous product that lacks reactivity with respect to a substance present in the reaction system after generation. , Where the volume of the product is at least greater than the volume of the reactants. That is, when such a substance is contained, the inflatable gas generated inside the composition during hydration is confined inside with the progress of hardening during generation,
With the increase in the amount of trapped gas, a strong pressure is generated inside the cured body, which acts as a counterforce to the shrinkage phenomenon, whereby shrinkage deformation and cracks can be almost completely suppressed. As such a substance, for example, a particulate substance obtained by heat-treating a carbon-based compound such as fluid coke which is a by-product of petrochemical as disclosed in JP-B-60-4150 is suitable. The compounding amount of the substance in the present invention is 0.1 to 15 parts by weight based on 100 parts by weight of the alumina cement.
If the amount is less than 0.1 part by weight, the desired internal pressure cannot be obtained, and
Exceeding the parts by weight may cause excessive expansion and deformation, which is not preferable.
【００１２】本グラウト組成物は、ポリエチレングリコ
ール鎖を有するポリカルボン酸系高分子化合物、低級ア
ルコールアルキレンオキシド付加物の何れか１種以上を
含有するのが望ましい。ポリエチレングリコール鎖を有
するポリカルボン酸系高分子化合物としては、例えばポ
リエチレングリコール鎖を有する（メタ）アクリル酸系
共重合体、ポリアルキレングリコール鎖を有するマレイ
ン酸系共重合体（多価金属塩を除く）等を挙げることが
できる。ポリエチレングリコール鎖を有するポリカルボ
ン酸系高分子化合物を使用すると低水量にしても良好な
分散性と流動性が確保され、混練から施工までの作業性
の向上を図ることができる。更に該高分子化合物は、と
りわけアルミナセメントと併用した場合、アルミナセメ
ントの硬化収縮量を低減させる効果があることが本発明
者等によって確認されており、この点からも使用が推奨
される。ポリエチレングリコール鎖を有するポリカルボ
ン酸系高分子化合物の配合量はアルミナセメント１００
重量部に対し０．０１〜１．０重量部とする。０．０１
重量部未満では添加効果が殆ど現れず、１．０重量部を
超える量では硬化遅延を起こし易くなるので、何れも好
ましくない。The grout composition preferably contains at least one of a polycarboxylic acid polymer having a polyethylene glycol chain and a lower alcohol alkylene oxide adduct. Examples of the polycarboxylic acid polymer having a polyethylene glycol chain include a (meth) acrylic acid copolymer having a polyethylene glycol chain and a maleic acid copolymer having a polyalkylene glycol chain (excluding polyvalent metal salts). ) And the like. When a polycarboxylic acid polymer having a polyethylene glycol chain is used, good dispersibility and fluidity are ensured even when the amount of water is low, and workability from kneading to construction can be improved. Further, it has been confirmed by the present inventors that the polymer compound has an effect of reducing the hardening shrinkage of the alumina cement, particularly when used in combination with the alumina cement, and the use thereof is also recommended from this point. The compounding amount of the polycarboxylic acid-based polymer compound having a polyethylene glycol chain is alumina cement 100
0.01 to 1.0 parts by weight based on parts by weight. 0.01
If the amount is less than 1 part by weight, the effect of the addition hardly appears, and if the amount exceeds 1.0 part by weight, curing delay is apt to occur.
【００１３】また低級アルコールアルキレンオキシド付
加物は、一般にコンクリートやモルタルの乾燥収縮を低
減させるための混和剤に使用されているものであれば特
に限定されず、入手上の利便性から市販品で良い。尚、
本発明者等は、低級アルコールアルキレンオキシド付加
物がアルミナセメント系組成物の硬化収縮量の縮小化作
用を少なからず有するという知見も得ている。低級アル
コールアルキレンオキシド付加物の配合量は、アルミナ
セメント１００重量部に対して０．１〜８．０重量部が
好ましく、０．１重量部未満では配合効果が殆ど発現さ
れず、また８．０重量部を超えると硬化遅延を起こし易
くなり、何れも好ましくない。The lower alcohol alkylene oxide adduct is not particularly limited as long as it is generally used as an admixture for reducing drying shrinkage of concrete or mortar, and a commercially available product may be used from the viewpoint of convenience in obtaining. . still,
The present inventors have also found that the lower alcohol alkylene oxide adduct has a considerable effect of reducing the amount of curing shrinkage of the alumina cement-based composition. The compounding amount of the lower alcohol alkylene oxide adduct is preferably 0.1 to 8.0 parts by weight based on 100 parts by weight of the alumina cement, and if less than 0.1 part by weight, the compounding effect is hardly exhibited, and 8.0 or less. If the amount is more than 10 parts by weight, curing delay tends to occur, and both are not preferred.
【００１４】本発明のグラウト組成物は、上記以外にも
例えば遅延剤や消泡剤等の公知混和剤、フライアッシュ
や各種スラグ類等の増量材を性状に支障をきたさない範
囲で適宜使用しても良い。一例として増量材ならアルミ
ナセメント１００重量部に対し５〜１００重量部程度配
合することができる。尚、グラウト工法に適した作業性
状を確保するため増量材等の付加配合物は粒径５μｍ以
下の粒子含有量が５０重量％を超えない範囲の粉末とす
ることが望ましく、また５ｍｍを超える粗粒は予め除去
しておくことが望ましい。。In addition to the above, the grout composition of the present invention may optionally contain known admixtures such as retarders and defoamers, and extenders such as fly ash and various slags as long as the properties are not adversely affected. May be. As an example, an extender can be added in an amount of about 5 to 100 parts by weight based on 100 parts by weight of alumina cement. In addition, in order to secure work properties suitable for the grouting method, it is desirable that the additional compound such as a filler be a powder having a particle size of 5 μm or less and a particle content not exceeding 50% by weight, and a coarse powder having a particle size of more than 5 mm. It is desirable that grains are removed in advance. .
【００１５】また、本グラウト組成物は比較的低水量と
することができ、水の配合量は液分を除いたグラウト組
成物１００重量部に対し、１０〜２５重量部が好まし
く、１２〜２０重量部がより好ましい。水配合量が１０
重量部未満では、水和反応に供される水分が不足するこ
とがある他、流動性が低下しグラウト工法に適さなくな
る場合があるので好ましくない。また水配合量が２５重
量部を超えると強度低下や材料分離を生じることがある
ため好ましくない。The grout composition can have a relatively low water content. The amount of water is preferably 10 to 25 parts by weight, more preferably 12 to 20 parts by weight, based on 100 parts by weight of the grout composition excluding liquid components. Parts by weight are more preferred. Water content is 10
If the amount is less than part by weight, the water provided for the hydration reaction may be insufficient, and the fluidity may be reduced, which may make the composition unsuitable for the grouting method. On the other hand, if the amount of water exceeds 25 parts by weight, the strength may be lowered or the material may be separated, which is not preferable.
【００１６】[0016]
【実施例】本発明を実施例を用いて具体的に説明する。
尚、参考のため本発明の範囲から外れるものを比較例と
して併せて記す。EXAMPLES The present invention will be specifically described with reference to examples.
For reference, those deviating from the scope of the present invention are also described as comparative examples.
【００１７】［使用原料］ 以下の〔１〕〜〔４〕から
選択される原料を使用し、配合物を作製した。 〔１〕セメント 主要化学成分が、Ａｌ2Ｏ3：５０．７％、ＣａＯ：３
６．５％、Ｆｅ2Ｏ3：６．０％、ＳｉＯ2：５．０％の
アルミナセメントクリンカを、ボールミルと振動ミルに
よって粉砕したものを風篩で粒度調整し、粒径５μｍ以
下の粒子含有率が１０重量％のもの（以下Ａ１と略
す）、２０重量％のもの（以下Ａ２と略す）、３０重量
％のもの（以下Ａ３と略す）又は粒径５μｍ以下の粒子
含有率が約２０重量％の市販の普通ポルトランドセメン
ト（以下ＯＰＣと略す）の４種から選定。[Raw Materials Used] A blend was prepared using raw materials selected from the following [1] to [4]. [1] Cement The main chemical components are Al 2 O 3 : 50.7%, CaO: 3
Alumina cement clinker of 6.5%, Fe 2 O 3 : 6.0%, SiO 2 : 5.0% was pulverized by a ball mill and a vibration mill, and the particle size was adjusted by a wind sieve to obtain particles having a particle size of 5 μm or less. When the content is 10% by weight (hereinafter abbreviated as A1), 20% by weight (hereinafter abbreviated as A2), 30% by weight (hereinafter abbreviated as A3), or the content of particles having a particle size of 5 μm or less is about 20% 4% by weight of commercially available ordinary Portland cement (hereinafter abbreviated as OPC).
【００１８】〔２〕細骨材 何れも最大粒径５ｍｍ以下であって、平均粒径１．５ｍ
ｍ（粒径５μｍ以下の粒子含有率０．５重量％）の珪砂
（以下Ｓ１と略す）、平均粒径８μｍ（粒径５μｍ以下
の粒子含有率４１．４重量％）の珪石微粉末（以下Ｓ２
と略す）又は平均粒径０．７μｍ（粒径５μｍ以下の粒
子含有率９９．８重量％）のシリカフューム（以下Ｓ３
と略す）の３種から選定。[2] Fine aggregate Each of them has a maximum particle size of 5 mm or less and an average particle size of 1.5 m.
m (silica sand (hereinafter abbreviated as S1) having a particle content of 5 μm or less (0.5% by weight), fine silica powder having an average particle size of 8 μm (41.4% by weight of a particle having a particle size of 5 μm or less) S2
) Or silica fume (hereinafter referred to as S3) having an average particle size of 0.7 μm (content of particles having a particle size of 5 μm or less 99.8% by weight).
Abbreviated).
【００１９】〔３〕水と反応し膨張性の気体状反応生成
物を生成する材料 市販品（商品名：PERMANENT LIFE AGGREGATE、INTERNAT
IONAL CONSTRUCTIONPRODUCTS RESERCH INC.製、以下Ｐ
Ｌと略す）[3] A material that reacts with water to produce an expansive gaseous reaction product Commercially available products (trade names: PERMANENT LIFE AGGREGATE, INTERNAT)
Made by IONAL CONSTRUCTIONPRODUCTS RESERCH INC.
Abbreviated as L)
【００２０】〔４〕混和剤 メラミンスルホン酸ホルムアルデヒド高縮合物塩を主成
分とする市販の粉末状分散剤（商品名：メルメントＦ１
０Ｍ、ＳＫＷイーストアジア社製、以下ＭＥと略す）、
ポリアルキレングリコール鎖を有するポリカルボン酸系
高分子化合物を主成分とする市販の粉末状分散剤（商品
名：コアフローＮＦ−１００、太平洋セメント（株）
製、以下ＣＦと略す）、低級アルコールアルキレンオキ
シド付加物を主成分とする市販の収縮低減剤（商品名：
テトラガードＡＳ２１、太平洋セメント（株）製、以下
ＴＧと略す）、市販のメチルセルロース系増粘剤使用
（商品名：ｈｉ−メトローズ、信越化学（株）社製、以
下ＭＣと略す）、市販の消泡剤（ＳＮ−ディフォーマー
１４ＨＰ、サンノプコ（株）社製、以下ＤＦと略す）か
ら選択される何れか１種又は２種以上。[4] Admixture A commercially available powdered dispersant containing melamine sulfonate formaldehyde polycondensate as a main component (trade name: Melment F1)
0M, SKW East Asia, hereinafter abbreviated as ME),
A commercially available powdered dispersant having a polycarboxylic acid-based polymer compound having a polyalkylene glycol chain as a main component (trade name: Coreflow NF-100, Taiheiyo Cement Corporation)
(Hereinafter abbreviated as CF), a commercially available shrinkage reducing agent containing a lower alcohol alkylene oxide adduct as a main component (trade name:
Tetraguard AS21, manufactured by Taiheiyo Cement Co., Ltd., hereinafter abbreviated as TG), using a commercially available methylcellulose-based thickener (trade name: hi-metroze, manufactured by Shin-Etsu Chemical Co., Ltd., abbreviated as MC), commercially available Any one or two or more selected from foaming agents (SN-Deformer 14HP, manufactured by San Nopco Co., Ltd., hereinafter abbreviated as DF).
【００２１】［原料配合］前記〔１〕〜〔４〕の原料を
表１に表す配合割合に調整し、この配合物１００重量部
（液状原料は固形分重量に換算）に対し表１に記載した
重量部の水を加え、モルタルミキサーで約３分間混合・
混練を行って混練物を作製した。尚、配合物中の全無機
系粒子中の粒径５μｍ以下の粒子含有量（重量％）を併
せて表１に記した。[Raw Material Mixing] The raw materials of the above [1] to [4] were adjusted to the mixing ratio shown in Table 1, and 100 parts by weight of this compound (liquid raw material is converted to solid weight) is shown in Table 1. Add water by weight and mix with a mortar mixer for about 3 minutes.
Kneading was performed to produce a kneaded product. Table 1 also shows the content (% by weight) of particles having a particle size of 5 μm or less in all the inorganic particles in the blend.
【００２２】[0022]
【表１】 [Table 1]
【００２３】［混練物の性状］該混練物の充填性の評価
として、土木学会基準「ＰＣグラウト試験方法（ＪＳＣ
Ｅ−Ｆ５３１）」に準じた方法により、落ち口内径１４
ｍｍのＪロートを用いてＪロートの流下時間を測定し
た。結果を表２に表す。[Characteristics of Kneaded Material] As an evaluation of the filling property of the kneaded material, the PCG grout test method (JSC
E-F531)), the inner diameter of the outlet 14
The falling time of the J funnel was measured using a mm J funnel. The results are shown in Table 2.
【００２４】［混練物から作製した硬化体の物理的性
状］また該混練物をφ５０×１００ｍｍの鋼製型枠に高
さ９０ｍｍ程度まで充填し、型枠上端面から混練物充填
面までの深さ：ＨMを測定した。充填後１分間静置し、
混練物充填面上にシリコンオイルを厚さ５ｍｍとなるよ
う流し込み、型枠上端面からシリコンオイル上面までの
深さ：Ｈ0を計り、シリコンオイル流し込み時から４時
間後、２４時間後、４８時間後の型枠上端面からシリコ
ンオイル上面までの深さ：ＨXを測定し、次の式から硬
化膨張収縮率を算出した。 硬化膨張収縮率（％）＝１００×（Ｈ0−ＨX）／（１０
０−ＨM） 更に、同様の混練物から供試体を作製し、ＪＩＳ Ｒ
５２０１に準じた方法で材齢１日、７日及び２８日の圧
縮強度も測定した。以上の結果も表２に表す。[Physical Properties of the Cured Body Made from the Kneaded Material] The kneaded material is filled into a steel mold of φ50 × 100 mm to a height of about 90 mm, and the depth from the upper end surface of the mold to the filling surface of the kneaded material is filled. is the: was measured H M. Let stand for 1 minute after filling,
Pouring such as thickness of 5mm silicone oil to the kneaded product filling surface, the depth of the mold upper end surface to the silicone oil top: weighed H 0, 4 hours after the time of pouring silicone oil, after 24 hours, 48 hours mold upper surface a silicon oil top surface to a depth after: the H X was measured to calculate the setting expansion shrinkage from the following equation. Curing expansion / shrinkage ratio (%) = 100 × (H 0 −H X ) / (10
0-H M ) Further, a specimen was prepared from the same kneaded material and was subjected to JIS R
The compressive strength was also measured on the 1st, 7th and 28th days of age by the method according to 5201. The above results are also shown in Table 2.
【００２５】[0025]
【表２】 [Table 2]
【００２６】また更に、コンクリート板上に前記混練物
を５００×５００×４０ｍｍの形状になるように流し込
み、次いで、コンクリート板ごと温度２０℃、湿度４０
％の恒温恒湿器内に静置し、２４時間後におけるひび割
れの発生有無を目視で観察した結果、本実施例では何れ
もひび割れが見られなかった。尚、比較例２〜５では明
確なひび割れが見られた。Further, the kneaded material was poured into a concrete plate so as to have a shape of 500 × 500 × 40 mm.
% In a constant temperature and humidity chamber, and the occurrence of cracks was visually observed after 24 hours. As a result, no crack was observed in any of the examples. In Comparative Examples 2 to 5, clear cracks were observed.
【００２７】［混練物から作製した硬化体の耐酸性状］
前記混練物からφ７５×１５０ｍｍの円柱状硬化体を作
製し、材齢２８日まで温度２０±１℃のイオン交換水中
で水中養生させた硬化体の浸透拡散抵抗性及び質量変化
率（質量減少率）を、建材試験センター規格ＪＳＴＭ
Ｃ７４０１「溶液浸漬によるコンクリートの耐薬品性試
験方法」に準じた方法で、３０日間硫酸水溶液（ｐＨ
０．４±０．１）に浸漬して測定した。浸透拡散抵抗性
は、硫酸浸漬後の硬化体中への硫酸浸漬深さ（ｍｍ）で
表した。各測定結果を表２に併せて記す。[Acid Resistance of Cured Product Made from Kneaded Material]
A columnar cured body of φ75 × 150 mm was prepared from the kneaded material, and the cured body cured in water in ion-exchanged water at a temperature of 20 ± 1 ° C. up to a material age of 28 days had a permeation-diffusion resistance and a mass change rate (mass reduction rate). ), Building Material Testing Center Standard JSTM
For 30 days, a sulfuric acid aqueous solution (pH
0.4 ± 0.1). The permeation diffusion resistance was represented by the depth (mm) of sulfuric acid immersion in the cured product after sulfuric acid immersion. The results of each measurement are also shown in Table 2.
【００２８】[0028]
【発明の効果】本発明のグラウト組成物は、強力な耐酸
性と高い強度発現性を示し、また硬化収縮率が極めて小
さく、ひび割れも発生しないため、高精度の保形性に優
れる。また適度な流動性を維持できるためグラウト工法
での施工性にも優れる他、特に本グラウト組成物は予混
合タイプのグラウト材としても安定した品質性能で使用
できるため作業性の自由度が飛躍的に増大する。更に本
グラウト組成物は、水和反応時に水酸化カルシウムを生
成しないので白華が生じ難く美観性に優れ、更には糖類
や油類に対する耐食性も兼ね備えている。The grout composition of the present invention exhibits strong acid resistance and high strength development, and has an extremely small curing shrinkage ratio and does not crack, so that it is excellent in high-precision shape retention. In addition to being able to maintain appropriate fluidity, it is excellent in workability by grouting method.In particular, this grout composition can be used as premixed type grout material with stable quality performance, so the degree of freedom of workability is drastic To increase. Furthermore, since the present grout composition does not generate calcium hydroxide during the hydration reaction, it does not easily produce efflorescence and is excellent in aesthetics, and also has corrosion resistance to sugars and oils.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 22:02 Ｃ０４Ｂ 22:02 24:32 24:32 Ａ 24:26） 24:26） Ｅ 111:70 111:70 Ｆターム(参考） 2D055 JA00 KB10 4G012 PA02 PA03 PA04 PB15 PB32 PB35 PB40 PC03 PC08 PC09──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 22:02 C04B 22:02 24:32 24:32 A 24:26) 24:26) E 111: 70 111: 70 F term (reference) 2D055 JA00 KB10 4G012 PA02 PA03 PA04 PB15 PB32 PB35 PB40 PC03 PC08 PC09
Claims (4)
が２５重量％以下であるアルミナセメントを重量比で細
骨材／アルミナセメント＝７０／３０〜４０／６０の割
合で含み、且つ水と反応して膨張性気体を生成する粉粒
状物質を含有してなるグラウト組成物。1. Fine aggregate and alumina cement having a particle size of 5 μm or less and a particle content of 25% by weight or less are contained in a weight ratio of fine aggregate / alumina cement = 70/30 to 40/60, and A grout composition comprising a particulate material that reacts with water to generate an inflatable gas.
れる全無機系粒子のうち粒径５μｍ以下の粒子の割合が
２５重量％以下であるグラウト組成物。2. A grout composition wherein the proportion of particles having a particle size of 5 μm or less is 25% by weight or less among all inorganic particles contained in the grout composition according to claim 1.
状物質がフルイドコークスである請求項１又は２に記載
のグラウト組成物。3. The grout composition according to claim 1, wherein the pulverulent and particulate substance which reacts with water to generate an inflatable gas is fluid coke.
カルボン酸系高分子化合物、低級アルコールアルキレン
オキシド付加物の何れか１種以上を含有する請求項１〜
３の何れか記載のグラウト組成物。4. The composition according to claim 1, which comprises at least one of a polycarboxylic acid polymer having a polyethylene glycol chain and a lower alcohol alkylene oxide adduct.
4. The grout composition according to any one of the above items 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001014999A JP2002220271A (en) | 2001-01-23 | 2001-01-23 | Grout composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001014999A JP2002220271A (en) | 2001-01-23 | 2001-01-23 | Grout composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002220271A true JP2002220271A (en) | 2002-08-09 |
Family
ID=18881619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001014999A Pending JP2002220271A (en) | 2001-01-23 | 2001-01-23 | Grout composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002220271A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231967A (en) * | 2004-02-20 | 2005-09-02 | Nmb Co Ltd | Admixture for prestressed concrete grout |
| JP2006131488A (en) * | 2004-10-07 | 2006-05-25 | Ube Ind Ltd | Acid resistant grout composition |
| JP2006290731A (en) * | 2005-03-15 | 2006-10-26 | Shimizu Corp | Acid resistant composition |
| JP2018068238A (en) * | 2016-11-01 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| JP2018068246A (en) * | 2016-11-02 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| CN114441565A (en) * | 2021-12-04 | 2022-05-06 | 中建三局集团有限公司 | high-X-ray-contrast grouting material and preparation method thereof |
-
2001
- 2001-01-23 JP JP2001014999A patent/JP2002220271A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231967A (en) * | 2004-02-20 | 2005-09-02 | Nmb Co Ltd | Admixture for prestressed concrete grout |
| JP2006131488A (en) * | 2004-10-07 | 2006-05-25 | Ube Ind Ltd | Acid resistant grout composition |
| JP4677824B2 (en) * | 2004-10-07 | 2011-04-27 | 宇部興産株式会社 | Acid resistant grout composition |
| JP2006290731A (en) * | 2005-03-15 | 2006-10-26 | Shimizu Corp | Acid resistant composition |
| JP2018068238A (en) * | 2016-11-01 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| JP2018068246A (en) * | 2016-11-02 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| CN114441565A (en) * | 2021-12-04 | 2022-05-06 | 中建三局集团有限公司 | high-X-ray-contrast grouting material and preparation method thereof |
| CN114441565B (en) * | 2021-12-04 | 2023-12-19 | 中建三局集团有限公司 | High X-ray contrast grouting material and preparation method thereof |
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