JP2017178704A - Dust emission prevention agent for grout material composition and low dust emission type grout material composition - Google Patents
Dust emission prevention agent for grout material composition and low dust emission type grout material composition Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 148
- 239000011440 grout Substances 0.000 title claims abstract description 140
- 239000000203 mixture Substances 0.000 title claims abstract description 111
- 239000000428 dust Substances 0.000 title claims abstract description 104
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 24
- 230000002265 prevention Effects 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000004568 cement Substances 0.000 claims abstract description 50
- 150000001298 alcohols Chemical class 0.000 claims abstract description 24
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 21
- 125000005702 oxyalkylene group Chemical group 0.000 claims abstract description 9
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003112 inhibitor Substances 0.000 claims description 29
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 230000001476 alcoholic effect Effects 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000002156 mixing Methods 0.000 abstract description 5
- 238000004898 kneading Methods 0.000 description 31
- 239000003638 chemical reducing agent Substances 0.000 description 14
- 239000004570 mortar (masonry) Substances 0.000 description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical class OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 230000001629 suppression Effects 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000011398 Portland cement Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 7
- 239000002518 antifoaming agent Substances 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000004088 foaming agent Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
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- 239000004576 sand Substances 0.000 description 5
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- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 150000002334 glycols Chemical class 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000010410 dusting Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
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- 238000003756 stirring Methods 0.000 description 3
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- 230000002459 sustained effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007580 dry-mixing Methods 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- 229940058015 1,3-butylene glycol Drugs 0.000 description 1
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 description 1
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
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- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
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- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 238000005342 ion exchange Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、グラウト材組成物用粉塵低減剤に関する。詳しくは、水と混練するときの発塵が少ないグラウト材組成物が得られるグラウト材組成物用粉塵低減剤に関する。また、本発明は、低発塵型グラウト材組成物に関する。詳しくは、水と混練するときの発塵が少ない低発塵型グラウト材組成物に関する。 The present invention relates to a dust reducing agent for a grout material composition. More specifically, the present invention relates to a dust reducing agent for a grout material composition from which a grout material composition that generates less dust when kneaded with water is obtained. The present invention also relates to a low dust generation type grout material composition. Specifically, the present invention relates to a low dust generation type grout material composition that generates little dust when kneaded with water.
土木構造物や建築構造物の構築や補修、或いは機械の設置等の土木工事又は建築工事において、無収縮セメント系グラウト材（無収縮モルタル）が多く使用されている。例えば、逆打ち工法における空隙、橋梁支承及び機械のベースプレート下の空隙等の充填に無収縮セメント系グラウト材が用いられている。また、道路橋に用いられる鋼床版のデッキプレート下面に配置されているＵリブ等の鋼製中空部材にセメント系グラウト材を充填することで補強を行うことがある。また、橋脚の鋼鈑巻き立てによる補強工法において、元の橋脚と鋼鈑との間の充填材としても、無収縮セメント系グラウト材が多く利用されている。その他の構造物の補修及び補強にも、無収縮セメント系グラウト材が多く利用されている。 Non-shrinkage cement grout materials (shrinkage-free mortar) are often used in civil engineering or building work such as construction and repair of civil engineering structures and building structures, or installation of machines. For example, non-shrinkable cement grout material is used for filling voids, bridge bearings, voids under the machine base plate, and the like in the reverse driving method. Moreover, reinforcement may be performed by filling a steel-based hollow member such as a U-rib disposed on the bottom surface of a deck plate of a steel deck used for a road bridge with a cement grout material. Further, in the reinforcement method by rolling the steel pier of the pier, non-shrinkage cement grout material is often used as a filler between the original pier and the steel slag. Non-shrinkage cement grout material is also used for repair and reinforcement of other structures.
無収縮モルタルは、プレミックスモルタル、即ち、セメント、乾燥した細骨材及び粉末状混和材料を乾式混合した粉粒体（粉と粒状が混ざった状態）で、工事現場まで運搬され、グラウト材（無収縮モルタル）を打ち込む直前に水とミキサで混練され製造されることも多い。この場合、混練時に発塵することから、作業環境が悪化することがあり、また、住宅街や人通りの多い場所で無収縮モルタル等のセメント系グラウト材を混練する場合は、周辺住民や通行人等に迷惑を掛ける虞がある。このため、混練時の発塵を抑制したセメント系グラウト材組成物、即ち粉塵低減型グラウト材組成物が望まれていた。グラウト材組成物の混練時の発塵を抑制する技術として、発塵抑制剤（粉塵低減剤）としてジエチレングルコール等のアルコール類を用い、水和によりエトリンガイトを生成するエトリンガイト生成成分を含む膨張材と併用する技術（例えば、特許文献１参照。）が提案されている。 Non-shrink mortar is a premixed mortar, that is, a granular material (a mixture of powder and granular material) obtained by dry-mixing cement, dry fine aggregate and powdered admixture, transported to the construction site, and grout material ( It is often produced by kneading with water and a mixer immediately before the non-shrinkable mortar is driven. In this case, dust is generated at the time of kneading, so the working environment may be deteriorated. Also, when kneading cement-based grout materials such as non-shrinking mortar in residential areas and busy places, the surrounding residents and traffic There is a risk of annoying others. For this reason, a cement-type grout material composition in which dust generation during kneading is suppressed, that is, a dust-reducing grout material composition has been desired. As a technology for suppressing dust generation during kneading of a grout material composition, an expanding material containing an ettringite-producing component that generates ettringite by hydration using alcohols such as diethylene glycol as a dust generation inhibitor (dust reduction agent) (See, for example, Patent Document 1).
しかしながら、特許文献１等に記載されるようなアルコール類からなる発塵抑制剤を、グラウト材組成物に添加すれば混練時の発塵は抑制されることが期待される。しかし、発塵抑制剤をグラウト材組成物に添加する方法としては、乾式混合時のグラウト材組成物に液体である発塵抑制剤を噴霧することが好ましいが、本願発明者らの研究により、発塵抑制剤としてアルコール類そのものをグラウト材組成物に噴霧すると、霧状になり難いためにグラウト材組成物に均等に添加されずに添加されていない部分のグラウト材組成物が発塵してしまい、結果として発塵抑制性能が不充分な場合があった。これは、アルコール類の粘性が高過ぎるためではないかと考えて、アルコール類を水で希釈することを考えた。しかし、希釈の程度によっては長期間保存すると、発塵抑制効果が低下することが分かってきた。また、発塵抑制剤のグラウト材組成物への添加率によっては、混練後のグラウト材としての品質を損なう場合があることが分かってきた。例えば、発塵低減効果を得るための添加量が多く必要な発塵抑制剤、低温環境下においてグラウト材の品質が著しく損なわれることがあることが分かってきた。 However, it is expected that dust generation during kneading is suppressed if a dust generation inhibitor composed of alcohols as described in Patent Document 1 is added to the grout material composition. However, as a method of adding a dust generation inhibitor to the grout material composition, it is preferable to spray a liquid dust generation inhibitor on the grout material composition at the time of dry mixing. If the alcohol itself is sprayed on the grout material composition as a dust suppressant, it is difficult to form a mist, so the grout material composition of the part that is not added evenly added to the grout material composition is dusted. As a result, there are cases where the dust generation suppression performance is insufficient. This was thought to be because the viscosity of the alcohols was too high, and was considered to dilute the alcohols with water. However, it has been found that, depending on the degree of dilution, the effect of suppressing dust generation decreases when stored for a long period of time. It has also been found that depending on the addition rate of the dust suppressant to the grout material composition, the quality of the grout material after kneading may be impaired. For example, it has been found that the quality of the grout material may be significantly impaired in a dust generation inhibitor and a low temperature environment that require a large amount of addition to obtain a dust generation reduction effect.
本発明は前記問題の解決、即ち、本発明は、混練時に発塵し難いセメント系グラウト材組成物を得られるグラウト材組成物用発塵抑制剤を提供することを目的とする。より詳しくは、添加したセメントを含有するグラウト材組成物が水との混練時に発塵し難く、その効果が持続し且つ混練により製造したグラウト材がグラウト材としての性能を具備するグラウト材組成物用発塵抑制剤を提供することを目的とする。また、本発明は、混練時に発塵し難いセメント系グラウト材組成物を提供することを目的とする。より詳しくは、水と混練するときの発塵し難く、その効果が持続し且つ混練により製造したグラウト材がグラウト材としての性能を具備するグラウト材組成物を提供することを目的とする。 An object of the present invention is to provide a dust generation inhibitor for a grout material composition that can solve the above-mentioned problem, that is, obtain a cement-based grout material composition that hardly generates dust during kneading. More specifically, the grout material composition containing the added cement is less likely to generate dust when kneaded with water, the effect is sustained, and the grout material produced by kneading has the performance as a grout material. An object of the present invention is to provide an anti-dusting agent. Another object of the present invention is to provide a cement-type grout material composition that hardly generates dust during kneading. More specifically, an object of the present invention is to provide a grout material composition that is less likely to generate dust when kneaded with water, has a sustained effect, and has a grout material performance as a grout material.
本発明者は、前記課題解決のため鋭意検討した結果、特定のアルコール類と、水とを、特定の割合で含有することにより、上記課題を解決できることを見出し、本発明を完成させた。また、特定のアルコール類と水とを特定の割合で含有するグラウト材組成物用発塵抑制剤と、セメント、骨材及び混和材料を含有するグラウト材組成物とを、特定の割合で含有することにより、上記課題を解決できることを見出し、本発明を完成させた。即ち、本発明は、以下の（１）〜（３）で表すグラウト材組成物用発塵抑制剤、並びに、（４）表す低発塵型グラウト材組成物である。
（１）下記式（１）又は式（２）で表わされるアルコール類を７０〜９０質量％と、水を３０〜１０質量％とを含有するグラウト材組成物用発塵抑制剤。
ＨＯ（ＡＯ）ｎＨ ・・・・・・ （１）
（式中ＡＯは炭素数２又は３のオキシアルキレン基を表し、ｎはオキシアルキレン基の平均付加モル数を表す。）
Ｒ（ＯＨ）２ ・・・・・・ （２）
（式中Ｒは炭素数２〜８の炭化水素基を表し、ＯＨはアルコール性ヒドロキシ基を表す。）
（２）上記オキシアルキレン基の平均付加モル数（ｎ）が１〜５である上記（１）のグラウト材組成物用発塵抑制剤。
（３）上記のアルコール類がプロピレングリコール又はトリエチレングリコールである上記（１）又は（２）のグラウト材組成物用発塵抑制剤。
（４）セメント系グラウト材組成物と、当該セメント系グラウト材組成物１００質量部に対し、上記（１）〜（３）の何れかのグラウト材組成物用発塵抑制剤を添加率０．５〜５質量％で含有する、低発塵型グラウト材組成物。
As a result of intensive studies for solving the above problems, the present inventors have found that the above problems can be solved by containing specific alcohols and water in a specific ratio, and have completed the present invention. Also, it contains a specific proportion of a dust control agent for a grout composition containing a specific alcohol and water in a specific ratio, and a grout composition containing cement, aggregate and admixture. As a result, the present inventors have found that the above problems can be solved and completed the present invention. That is, this invention is the dust generation inhibitor for grout material compositions represented by the following (1)-(3), and the low dust generation type grout material composition represented by (4).
(1) A dust generation inhibitor for a grout material composition containing 70 to 90% by mass of an alcohol represented by the following formula (1) or formula (2) and 30 to 10% by mass of water.
HO (AO) nH (1)
(In the formula, AO represents an oxyalkylene group having 2 or 3 carbon atoms, and n represents the average number of moles added of the oxyalkylene group.)
R (OH) 2 (2)
(In the formula, R represents a hydrocarbon group having 2 to 8 carbon atoms, and OH represents an alcoholic hydroxy group.)
(2) The dust generation inhibitor for a grout material composition according to (1), wherein the average added mole number (n) of the oxyalkylene group is 1 to 5.
(3) The dust control agent for a grout material composition according to (1) or (2), wherein the alcohol is propylene glycol or triethylene glycol.
(4) The addition rate of the dust generation inhibitor for a grout material composition according to any one of the above (1) to (3) with respect to 100 parts by mass of the cement grout material composition and 100 parts by mass of the cement grout material composition. A low dust generation type grout material composition containing 5 to 5% by mass.
本発明によれば、混練時に発塵し難いセメント系グラウト材組成物を得られるグラウト材組成物用発塵抑制剤、より詳しくは、添加したセメントを含有するグラウト材組成物が水との混練時に発塵し難く、その効果が持続し且つ混練により製造したグラウト材がグラウト材としての性能を具備するグラウト材組成物用発塵抑制剤が得られる。また、本発明によれば、混練時に発塵し難いセメント系グラウト材組成物が得られる。詳しくは、水と混練するときの発塵し難く、その効果が持続し且つ混練により製造したグラウト材がグラウト材としての性能を具備するグラウト材組成物が得られる。また、本発明によれば、水と混練するときの発塵が少なく、作業環境に優れるセメント系グラウト材組成物が得られる。 According to the present invention, a dust generation inhibitor for a grout material composition that can obtain a cement-based grout material composition that hardly generates dust during kneading, more specifically, a grout material composition containing added cement is kneaded with water. A dust generation inhibitor for a grout material composition is obtained that is difficult to generate dust at times, has a sustained effect, and a grout material produced by kneading has performance as a grout material. Moreover, according to this invention, the cement-type grout material composition which is hard to generate | occur | produce dust at the time of kneading | mixing is obtained. Specifically, it is difficult to generate dust when kneaded with water, and a grout material composition is obtained in which the effect persists and the grout material produced by kneading has performance as a grout material. In addition, according to the present invention, a cement-type grout material composition that produces less dust when kneaded with water and has an excellent working environment can be obtained.
本発明は、下記式（１）又は式（２）で表わされるアルコール類を７０〜９０質量％と、水を３０〜１０質量％とを含有するグラウト材組成物用発塵抑制剤である。即ち、本発明のグラウト材組成物用発塵抑制剤は、下記式（１）で表わされるアルコール類の濃度が７０〜９０質量％の当該アルコール類の水溶液である。
ＨＯ（ＡＯ）ｎＨ ・・・・・・ （１）
（式中ＡＯは炭素数２又は３のオキシアルキレン基を表し、ｎはオキシアルキレン基の平均付加モル数を表す。）
Ｒ（ＯＨ）２ ・・・・・・ （２）
（式中Ｒは炭素数２〜８の炭化水素基を表し、ＯＨはアルコール性ヒドロキシ基を表す。）
This invention is a dust generation inhibitor for grout material compositions containing 70-90 mass% of alcohols represented by following formula (1) or formula (2) and 30-10 mass% of water. That is, the dust suppressant for a grout material composition of the present invention is an aqueous solution of the alcohol having a concentration of the alcohol represented by the following formula (1) of 70 to 90% by mass.
HO (AO) nH (1)
(In the formula, AO represents an oxyalkylene group having 2 or 3 carbon atoms, and n represents the average number of moles added of the oxyalkylene group.)
R (OH) 2 (2)
(In the formula, R represents a hydrocarbon group having 2 to 8 carbon atoms, and OH represents an alcoholic hydroxy group.)
本発明において混練時に発生する粉塵を少なくするために上記式（１）又は式（２）で表されるアルコール類（グリコール類）を用いる。さらに、上記式（１）で表されるアルコール類（エチレングリコール類）の場合は、発塵抑制効果並びにグラウト材組成物に使用する場合に、水と混練したときのグラウト材の品質に悪影響を及ぼさないことから平均付加モル数（ｎ）が１〜５であるエチレングリコール類を用いることが好ましい。ここで云うエチレングリコール類としては、例えば、エチレングリコール、ジエチレングリコール、トリエチレングリコール、テトラエチレングリコール、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコールが好ましい例として挙げられる。また、上記式（２）で表されるアルコール類（グリコール類）としては、例えば、プロピレングリコール、エチレングリコール、１，３−ブチレングリコール、２−メチル−２，４−ペンタンジオール（ヘキシレングリコール）、ペンタジオール−２，５、ヘプタンジオール−２，４、２−エチル−１，３ヘキサンジオール等が好適な例として挙げられる。本発明で用いる上記のアルコール類（グリコール類）は、単独で使用しても、２種以上併用して使用しても良い。トリエチレングリコール、テトラエチレングリコール、プロピレングリコールがより好ましい。 In the present invention, alcohols (glycols) represented by the above formula (1) or formula (2) are used in order to reduce dust generated during kneading. Furthermore, in the case of the alcohols (ethylene glycols) represented by the above formula (1), when used in a grout material composition, the quality of the grout material when kneaded with water is adversely affected. It is preferable to use ethylene glycols having an average number of added moles (n) of 1 to 5 because they do not reach. Preferred examples of the ethylene glycol herein include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, and tripropylene glycol. Examples of the alcohols (glycols) represented by the above formula (2) include propylene glycol, ethylene glycol, 1,3-butylene glycol, 2-methyl-2,4-pentanediol (hexylene glycol). , Pentadiol-2,5, heptanediol-2,4, 2-ethyl-1,3-hexanediol and the like are preferable examples. The alcohols (glycols) used in the present invention may be used alone or in combination of two or more. Triethylene glycol, tetraethylene glycol, and propylene glycol are more preferable.
本発明において、上記式（１）又は式（２）のアルコール類（グリコール類）と水の配合割合は、当該アルコール類を７０〜９０質量％および水を３０〜１０質量％とする。即ち、含まれる当該アルコール類と水の質量割合が、当該アルコール類／水の質量比で７０／３０〜９０／１０、つまり、アルコール類水溶液中の上記（１）式のアルコール類の濃度で７０〜９０質量％とする。アルコール類が７０質量％未満即ち水が３０質量％を超えると、発塵抑制剤（アルコール類と水の混合液、アルコール類の水溶液）を添加したグラウト材組成物は、日にちが経つと発塵抑制性能が低下する。また、アルコール類（の濃度）が９０質量％を超える即ち水が１０質量％未満では、霧状になり難く、グラウト材組成物中で発塵抑制剤が偏在し易く、発塵抑制性能が低い。グラウト材組成物中の発塵抑制剤を均一に存在させるためには、発塵抑制剤添加後のグラウト材組成物をより長い時間攪拌する必要があり、作業効率が悪い。 In the present invention, the mixing ratio of the alcohols (glycols) of formula (1) or formula (2) and water is 70 to 90% by mass for the alcohols and 30 to 10% by mass for water. That is, the mass ratio of the alcohol and water contained is 70/30 to 90/10 in terms of the mass ratio of the alcohol / water, that is, 70 in terms of the concentration of the alcohol of the above formula (1) in the alcohol aqueous solution. It is set to -90 mass%. When the alcohol content is less than 70% by mass, that is, when the water content exceeds 30% by mass, the grout material composition to which the dust generation inhibitor (mixture of alcohols and water, aqueous solution of alcohols) is added will generate dust when the date passes. Suppression performance decreases. Further, when the alcohol (concentration) exceeds 90% by mass, that is, when the water is less than 10% by mass, it is difficult to form a mist, and the dust generation inhibitor tends to be unevenly distributed in the grout material composition, and the dust generation suppression performance is low. . In order to make the dust generation inhibitor uniformly present in the grout material composition, it is necessary to stir the grout material composition after the addition of the dust generation inhibitor for a longer time, resulting in poor working efficiency.
本発明のグラウト材組成物用発塵抑制剤には、上記（１）式のアルコール類と水以外に、他の液体又は溶質の一種又は二種以上を本発明の効果を実質損なわない範囲で含有することができる。このような材料としては、例えば減水剤，ＡＥ減水剤,高性能減水剤,高性能ＡＥ減水剤,流動化剤等のセメント分散剤、起泡剤、防錆剤、収縮低減剤、保水剤、増粘剤、撥水剤、白華防止剤、急結剤(材)、急硬剤(材)、消泡剤、発泡剤等が挙げられ、グラウト材組成物用発塵抑制剤の主成分であるアルコール類水溶液に溶解又は/及び懸濁できるものが好ましい。 In the dust generation inhibitor for a grout material composition of the present invention, in addition to the alcohols and water of the above formula (1), one or more of other liquids or solutes may be used as long as the effects of the present invention are not substantially impaired. Can be contained. Examples of such materials include water reducing agents, AE water reducing agents, high performance water reducing agents, high performance AE water reducing agents, cement dispersants such as fluidizing agents, foaming agents, rust preventive agents, shrinkage reducing agents, water retention agents, Thickeners, water repellents, anti-whitening agents, quick setting agents (materials), hardeners (materials), antifoaming agents, foaming agents, etc. are listed as the main components of dust control agents for grout composition Those that can be dissolved or / and suspended in an aqueous alcohol solution are preferred.
本発明のグラウト材組成物用発塵抑制剤は、セメント系グラウト材組成物に添加して用いる。本発明において、セメント系グラウト材組成物とは、セメントと混和材料とを含有するグラウト材組成物を云い、更に細骨材を含有するものが好ましい。本発明において、グラウト材組成物とは、水と混練前のものをいい、水と混練後の混練物についてはグラウト材という。また、本発明においてグラウト材とは、漏斗を用いた流動性試験により流下時間を測定できる流動性を有するセメント混練物をいう。流動性試験で用いる漏斗は、グラウト材に含有する成分の最大粒径及びコンシステンシーに応じて選定でき、Ｐ漏斗、ＪＡ漏斗、ＪＰ漏斗、Ｊ漏斗（Ｊ１０漏斗）、Ｊ１４漏斗、Ｏ漏斗、Ｖ漏斗等が好ましい例として例示できる。本発明のグラウト材組成物用発塵抑制剤をセメント系グラウト材組成物に添加する方法は特に限定されないが、より均一に発塵抑制剤をセメント系グラウト材組成物中に分散させるために、霧状に噴霧することが好ましく、より好ましくはセメント系グラウト材組成物を攪拌させながら噴霧する。セメント系グラウト材組成物中に発塵抑制剤が偏在してしまうと発塵抑制効果が低下する。 The dust suppressing agent for a grout material composition of the present invention is used by adding to a cement grout material composition. In the present invention, the cement-type grout material composition refers to a grout material composition containing cement and an admixture, and further preferably contains fine aggregate. In the present invention, the grout material composition refers to that before kneading with water, and the kneaded material after kneading with water is referred to as a grout material. Further, in the present invention, the grout material refers to a cement kneaded material having fluidity capable of measuring the flow-down time by a fluidity test using a funnel. The funnel used in the fluidity test can be selected according to the maximum particle size and consistency of the components contained in the grout material. P funnel, JA funnel, JP funnel, J funnel (J 10 funnel), J 14 funnel, O funnel , V funnels and the like can be exemplified as preferable examples. The method of adding the dust control agent for the grout material composition of the present invention to the cement-type grout material composition is not particularly limited, but in order to more uniformly disperse the dust generation inhibitor in the cement-type grout material composition, It is preferable to spray in the form of a mist, and more preferably, the cement-type grout material composition is sprayed while being stirred. If the dust generation inhibitor is unevenly distributed in the cement-based grout material composition, the dust generation suppression effect decreases.
本発明のグラウト材組成物用発塵抑制剤の添加量は、セメント系グラウト材組成物の質量に対し、０．５〜５質量％が、発塵抑制効果があり且つセメント系グラウト材組成物を混練しグラウト材としたときの性状が無添加のものと比べて変化が小さくグラウト材としての性能を維持できるので好ましい。０．５質量％未満の量では発塵抑制効果が充分ではなく、５質量％を超える量ではグラウト材としたときの性状の変化が大きくグラウト材としての正性状を維持できない虞がある。発塵抑制効果があり且つグラウト材としたときの政情の変化が小さいことから、本発明のグラウト材組成物用発塵抑制剤の添加量は、セメント系グラウト材組成物の質量に対し、１〜４質量％とすることがより好ましく、１．５〜３．５質量％とすることが更に好ましく、最も好ましくは２〜３質量％とする。 The addition amount of the dust generation inhibitor for the grout material composition of the present invention is 0.5-5% by mass with respect to the mass of the cement-type grout material composition, and has a dust-generation suppressing effect, and the cement-type grout material composition. It is preferable because the properties when kneaded are made into a grout material are small in change as compared with those without additives and the performance as a grout material can be maintained. If the amount is less than 0.5% by mass, the dust generation suppressing effect is not sufficient, and if it exceeds 5% by mass, the property of the grout material changes greatly and the correct property as the grout material may not be maintained. Since there is a dust generation suppressing effect and the change in the political situation when the grout material is used is small, the addition amount of the dust generation inhibitor for the grout material composition of the present invention is 1 with respect to the mass of the cementitious grout material composition. It is more preferable to set it as -4 mass%, It is still more preferable to set it as 1.5-3.5 mass%, Most preferably, you may be 2-3 mass%.
本発明の低発塵型グラウト材組成物は、セメント系グラウト材組成物１００質量部に対し、上記のグラウト材組成物用発塵抑制剤を添加率０．５〜５質量％で含有することを特徴とする。セメント系グラウト材組成物は上記のものと同じで、セメントと混和材料とを含有するものであり、細骨材を含有するものが好ましい。 The low dust generation type grout material composition of the present invention contains the above dust generation inhibitor for a grout material composition at an addition rate of 0.5 to 5% by mass with respect to 100 parts by mass of the cementitious grout material composition. It is characterized by. The cement-type grout material composition is the same as that described above, and contains cement and an admixture, and preferably contains fine aggregate.
本発明に用いるセメントは、水硬性セメントであればよく、例えば普通、早強、超早強、低熱及び中庸熱の各種ポルトランドセメント、エコセメント、並びにこれらのポルトランドセメント又はエコセメントに、フライアッシュ、高炉スラグ、シリカフューム又は石灰石微粉末等を混合した各種混合セメント、太平洋セメント社製「ジェットセメント」（商品名）や住友大阪セメント社製「ジェットセメント」（商品名）等の超速硬セメント、アルミナセメント等が挙げられ、これらの一種又は二種以上を使用することができる。ワーカビリティを損ない難く可使時間が長く確保し易いことから、各種ポルトランドセメント、エコセメント及び各種混合セメントから選ばれる一種又は二種以上を使用することが好ましい。また、材齢１日の強度を高くし易いことから、普通ポルトランドセメント、早強ポルトランドセメント、超早強ポルトランドセメント及びエコセメントから選ばれる一種又は二種以上を使用することが更に好ましい。 The cement used in the present invention may be a hydraulic cement. For example, various ordinary portland cements, eco-cements, low-temperature and moderate-heated portland cements, eco-cements, and fly ash, Various mixed cements mixed with blast furnace slag, silica fume or limestone fine powder, etc., super fast hard cement such as “Jet Cement” (trade name) manufactured by Taiheiyo Cement Co., Ltd. and “Jet Cement” (trade name) manufactured by Sumitomo Osaka Cement Co., Alumina cement Etc., and one or more of these can be used. It is preferable to use one or two or more kinds selected from various Portland cements, eco-cements, and various mixed cements because workability is not easily impaired and the pot life is easy to ensure. Moreover, since it is easy to make the intensity | strength of material age 1 day high, it is still more preferable to use 1 type, or 2 or more types chosen from normal Portland cement, early-strength Portland cement, super early-strength Portland cement, and eco-cement.
本発明に用いる混和材料としては、特に種類は限定されないが、減水剤，ＡＥ減水剤,高性能減水剤,高性能ＡＥ減水剤,流動化剤等のセメント分散剤、セメント用ポリマー、起泡剤、防水材、防錆剤、保水剤、顔料、撥水剤、凝結促進剤、凝結遅延剤、白華防止剤、急結剤(材)、急硬剤(材)、消泡剤、石粉、表面硬化剤、増粘剤、膨張材、消泡剤、発泡剤、収縮低減剤、シリカフュームやメタカオリン等のポゾラン、高炉スラグ粉末、石膏、繊維等から選ばれる一種又は二種以上を使用することが好ましく、セメント分散剤、急結剤(材)、急硬剤(材)、凝結促進剤、凝結遅延剤、消泡剤、増粘剤、膨張材、消泡剤、発泡剤、収縮低減剤、ポゾラン、高炉スラグ粉末、石膏等から選ばれる一種又は二種以上を使用することがより好ましい。 The type of admixture used in the present invention is not particularly limited, but is a water reducing agent, an AE water reducing agent, a high performance water reducing agent, a high performance AE water reducing agent, a cement dispersing agent such as a fluidizing agent, a cement polymer, and a foaming agent. , Waterproof materials, rust preventives, water retention agents, pigments, water repellents, setting accelerators, setting retarders, anti-whitening agents, quick setting agents (materials), quick hardening agents (materials), antifoaming agents, stone powder, It is possible to use one or more selected from surface hardeners, thickeners, expansion agents, antifoaming agents, foaming agents, shrinkage reducing agents, pozzolans such as silica fume and metakaolin, blast furnace slag powder, gypsum, fibers, etc. Preferably, cement dispersant, rapid setting agent (material), rapid hardening agent (material), setting accelerator, setting retarder, antifoaming agent, thickener, expansion material, antifoaming agent, foaming agent, shrinkage reducing agent, It is more preferable to use one or more selected from pozzolans, blast furnace slag powder, gypsum and the like.
本発明に用いる細骨材としては、川砂、陸砂、海砂、砕砂、珪砂、石粉、人工細骨材、再生細骨材、スラグ細骨材、パーライト、シラスバルーン、フライアッシュバルーン、クリンカ細骨材等から選ばれる一種又は二種以上を使用することが好ましい。ここで、クリンカ細骨材とは、セメントクリンカの粉砕物で、通常のセメントよりも粗く、一般的な細骨材並みの粒度のものをいう。本発明で用いる細骨材としては、乾燥した状態のものが好ましい。また、本発明には、本発明の効果を損なわない範囲で、粗骨材を用いることもできる。この粗骨材としては、川砂利、陸砂利、海砂利、砕石、人工粗骨材、スラグ粗骨材等から選ばれる一種又は二種以上を使用することが好ましい。粗骨材も細骨材と同様に、乾燥した状態のものが好ましい。 Fine aggregates used in the present invention include river sand, land sand, sea sand, crushed sand, quartz sand, stone powder, artificial fine aggregate, recycled fine aggregate, slag fine aggregate, perlite, shirasu balloon, fly ash balloon, clinker fine. It is preferable to use one or more selected from aggregates and the like. Here, the clinker fine aggregate is a pulverized product of cement clinker, which is coarser than ordinary cement and has a particle size equivalent to that of a general fine aggregate. The fine aggregate used in the present invention is preferably in a dry state. Moreover, a coarse aggregate can also be used for this invention in the range which does not impair the effect of this invention. As this coarse aggregate, it is preferable to use one or more selected from river gravel, land gravel, sea gravel, crushed stone, artificial coarse aggregate, slag coarse aggregate and the like. As with the fine aggregate, the coarse aggregate is preferably in a dry state.
本発明の低発塵型グラウト材組成物は、水を混練に用いる。使用する水は、特に限定されるものではない。混和材料に含まれる水を用いてもよい。混練する方法は特に限定されず、例えば水に本発明の低発塵型グラウト材組成物を全量加え混練する方法、水に本発明の低発塵型グラウト材組成物を混練しながら加え更に混練する方法、本発明の低発塵型グラウト材組成物に水を全量加え混練する方法、本発明の低発塵型グラウト材組成物に水を混練しながら加え更に混練する方法、水及び本発明の低発塵型グラウト材組成物のそれぞれ一部ずつを２つ以上に分けて混練し、混練したものを合わせて更に混練する方法等がある。また、混練に用いる器具や混練装置も特に限定されないが、ミキサを用いることが量を多く混練できるので好ましい。用いることのできるミキサとしては連続式ミキサでもバッチ式ミキサでも良く、例えばパン型コンクリートミキサ、パグミル型コンクリートミキサ、重力式コンクリートミキサ、グラウトミキサ、ハンドミキサ、左官ミキサ等が挙げられる。 The low dust generation type grout material composition of the present invention uses water for kneading. The water to be used is not particularly limited. You may use the water contained in an admixture. The method of kneading is not particularly limited. For example, the method of kneading the whole amount of the low dusting type grout material composition of the present invention in water and kneading, the kneading of the low dusting type grout material composition of the present invention in water and further kneading. , A method for adding and kneading all the water to the low dust generation type grout material composition of the present invention, a method for adding and kneading water to the low dust generation type grout material composition of the present invention while kneading, water and the present invention There is a method in which a part of each low dust generation type grout material composition is kneaded into two or more parts, and the kneaded ones are further kneaded. Moreover, although the apparatus and kneading apparatus used for kneading are not particularly limited, it is preferable to use a mixer because a large amount can be kneaded. The mixer that can be used may be a continuous mixer or a batch mixer, such as a pan concrete mixer, a pug mill concrete mixer, a gravity concrete mixer, a grout mixer, a hand mixer, and a plaster mixer.
［実施例１］
アルコール類として２種類を用い、イオン交換蒸留水を所定割合で加え混合することで、アルコール類の水溶液（発塵抑制剤）を作製した。表１に試験に用いた発塵抑制剤を示した。
[Example 1]
Two types of alcohols were used, and ion exchange distilled water was added at a predetermined ratio and mixed to prepare an aqueous solution of alcohols (dust generation inhibitor). Table 1 shows the dust suppressant used in the test.
市販のセメント系グラウト材組成物（無収縮モルタル（プレミックスモルタル））を６ｋｇをホバート社製ミキサ（定格容量：１１Ｌ）に投入後、低速で攪拌しながら手動式の噴霧器を用いて作製したアルコール類水溶液を添加量を確認しながらセメント系グラウト材組成物に添加量が所定の添加率となるまで噴霧した。噴霧完了後更に３０秒間攪拌を行った。アルコール類を添加したセメント系グラウト材組成物を、全てビニール袋に入れ、当該ビニール袋に空気を入れ膨らませた状態で手で袋を閉じ数回手で袋を振った後の発塵状態を目視で確認した。 Alcohol produced using a commercially available cement grout composition (non-shrink mortar (premix mortar)) in a Hobart mixer (rated capacity: 11 L) and then stirred at a low speed using a manual sprayer The aqueous solution was sprayed on the cement grout composition while confirming the addition amount until the addition amount reached a predetermined addition rate. After completion of spraying, the mixture was further stirred for 30 seconds. Put all the cement-based grout composition containing alcohol into a plastic bag, and then inspect the dust generation after shaking the bag several times by hand with the bag closed with air inflated. Confirmed with.
次に、容量１０Ｌのステンレス製円筒容器に水を１．０８Ｌ入れ、ハンドミキサ（回転数：１１００ｒ．ｐ．ｍ．、羽根：直径１００mmステンレス製円盤）で攪拌しながらこのステンレス製円筒容器内に、前記のアルコール類水溶液を添加したセメント系グラウト材組成物を１０秒程度の時間を掛けて投入した。投入開始から６０秒間ハンドミキサで攪拌することでセメント系グラウト材組成物を混練し、水との混練物であるセメント系グラウト材（モルタル）を製造した。合わせて、アルコール類の原液を用いて同様にセメント系グラウト材組成物に添加し、水と混練しセメント系グラウト材（モルタル）を製造した。 Next, 1.08 L of water is put into a stainless steel cylindrical container with a capacity of 10 L, and the mixture is stirred in a stainless steel cylindrical container with a hand mixer (rotation speed: 1100 rpm, blade: 100 mm diameter stainless steel disk). The cement-type grout material composition to which the aqueous alcohol solution was added was charged over a period of about 10 seconds. The cement-type grout material composition was kneaded by stirring with a hand mixer for 60 seconds from the start of charging to produce a cement-type grout material (mortar) which was a kneaded product with water. In addition, using a stock solution of alcohols, the mixture was similarly added to the cement-type grout material composition, and kneaded with water to produce a cement-type grout material (mortar).
セメント系グラウト材組成物を入れたビニール袋を振ったときにビニール袋内が透明で発塵が殆ど見られず、且つステンレス製円筒容器内への投入・攪拌時にも発塵が殆ど見られなかった場合を発塵抑制性能が「良好（○）」と評価し、セメント系グラウト材組成物を入れたビニール袋を振ったときにビニール袋内が白く粉塵が舞っていた場合、又はステンレス製円筒容器内への投入・攪拌時に発塵が舞っていた場合を発塵抑制性能が「不良（×）」と評価した。また、アルコール類水溶液を添加したセメント系グラウト材組成物を入れたビニール袋を密閉し、１週間及び1ヶ月間２０℃の室内で保管後、同様に発塵抑制性能を評価した。発塵抑制性能が１月後も「良好（○）」であった場合を「発塵抑制保持性能が優れる（◎）」と評価し、１週後は発塵抑制性能が「良好（○）」であったが１月後は発塵抑制性能が「不良（×）」であった場合を「発塵抑制保持性能がある（○）」と評価し、１週後以降に発塵抑制性能が「不良（×）」であった場合を「発塵抑制保持性能がない（×）」と評価した。 When a plastic bag containing a cement-based grout material composition is shaken, the inside of the plastic bag is transparent and almost no dust is generated, and when dust is put into a stainless steel cylindrical container and stirred, almost no dust is generated. When the plastic bag with a cement grout material composition is shaken and the inside of the plastic bag is white and dust is flying, or a stainless steel cylinder The dust generation suppression performance was evaluated as “poor (×)” when dust generation was occurring during charging and stirring into the container. In addition, the plastic bag containing the cement-type grout material composition to which an aqueous alcohol solution was added was sealed and stored in a room at 20 ° C. for one week and one month, and the dust generation suppressing performance was similarly evaluated. When the dust generation suppression performance is still “good (○)” after one month, it is evaluated as “excellent dust generation retention performance (◎)”, and after one week the dust generation suppression performance is “good (○)”. ”But after 1 month, the dust suppression performance was evaluated as“ poor (×) ”as“ having dust suppression retention performance (○) ”. Was evaluated as “no dust generation holding performance (×)”.
また、アルコール類水溶液をセメント系グラウト材組成物に添加しその後更に３０秒間続けて攪拌した時に、添加したアルコール類水溶液に偏在が確認されずに均一に混ざっていた場合を噴霧効率（分散性）が「良好（○）」と評価し、セメント系グラウト材組成物に湿った状態の塊が見られ、添加したアルコール類水溶液に偏在が見られた場合を噴霧効率（分散性）が「不良（×）」と評価した。 In addition, when the alcohol aqueous solution is added to the cement-type grout material composition and then stirred for another 30 seconds, the added alcohol aqueous solution is uniformly mixed without being confirmed to be sprayed (dispersibility). Was evaluated as “good (○)”, and when the cement-type grout composition was found to have a lump in a wet state and unevenly distributed in the added aqueous alcohol solution, the spray efficiency (dispersibility) was “bad” X) ".
作製したグラウト材の品質試験として、以下に示す試験を行った。その結果を用いたアルコール類水溶液の種類・濃度・添加率、並びに発塵抑制性能及び発塵抑制性能の評価とともに表２に示した。
＜ 品質試験方法＞
・Ｊ１４漏斗流下時間
土木学会規準ＪＳＣＥ−Ｆ ５４１−２０１０「充てんモルタルの流動性試験方法（案）」に従い、Ｊ１４漏斗を用いて、混練直後の流下時間を測定した。
・フロー値
ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」１１．「フロー試験」(ただし、１５回の落下運動は行わず測定を行った。)に準じて、フロー値（引き抜きフロー）を測定した。
・不分離性
Ｊ１４漏斗流下時間およびフロー値の測定時において、ブリーディング及び骨材の沈降がともに見られなかった場合を不分離性が「良好（○）」と評価し、ブリーディング又は骨材の沈降が見られた場合を不分離性が「不良（×）」と評価した。
As a quality test of the produced grout material, the following tests were performed. The results are shown in Table 2 together with the evaluation of the type / concentration / addition rate of the aqueous alcohol solution, the dust suppression performance and the dust suppression performance.
<Quality test method>
According · J 14 funnel flow time of Civil Engineers reference JSCE-F 541-2010 "Test Method of Flowability for Filling Mortar (draft)", using a J 14 funnel was measured flow time immediately after kneading.
Flow value JIS R 5201 “Cement physical test method” 11. The flow value (drawing flow) was measured according to the “flow test” (however, the measurement was carried out without performing 15 drop movements).
・ Inseparability J 14 When the funnel flow time and flow value were measured, if no bleeding or aggregate sedimentation was observed, the segregation was evaluated as “good (○)”. When the sedimentation was observed, the non-separability was evaluated as “poor (×)”.
試験に用いた材料を以下に示した。
＜使用材料＞
・セメント系グラウト材組成物 ： 無収縮モルタル（ポルトランドセメント、乾燥した珪砂及び石灰石砕砂、石灰系膨張材、高性能減水剤、発泡剤、消泡剤及び増粘剤を含有するプレミックスモルタル、太平洋マテリアル社製）
・アルコール類１ ： プロピレングリコール
・アルコール類２ ： トリエチレングリコール
・水（モルタル混練用練り混ぜ水） ： 千葉県佐倉市上水
The materials used for the test are shown below.
<Materials used>
Cement-based grout material composition: Non-shrink mortar (Portland cement, dry silica sand and limestone crushed sand, lime-based expansion agent, high-performance water reducing agent, foaming agent, antifoaming agent and thickener containing premix mortar, Pacific Ocean (Made by Material)
・ Alcohols 1: Propylene glycol ・ Alcohols 2: Triethylene glycol ・ Water (Mixed water for kneading mortar): Kamimizu, Sakura City, Chiba Prefecture
アルコール類の濃度が７０〜９０質量％の発塵抑制剤（本発明品の発塵抑制剤）をセメント系グラウト材組成物の質量に対し１．５〜５質量％で添加したセメント系グラウト材組成物は、発塵が抑制された低発塵型グラウト材組成物であり、グラウト材としてのコンシステンシー及び材料不分離性を備えるグラウト材が得られた。 Cement grout material in which a dust generation inhibitor (the dust generation inhibitor of the present invention) having an alcohol concentration of 70 to 90% by mass is added in an amount of 1.5 to 5% by mass with respect to the mass of the cement type grout material composition. The composition was a low dust generation type grout material composition in which dust generation was suppressed, and a grout material having a consistency and material inseparability as a grout material was obtained.
本発明によれば、発塵量が少ないグラウト材組成物が得られるので、土木工事及び建築工事の何れにも好適に用いることができる。また、本発明のグラウト材組成物用発塵抑制剤を用いたグラウト材組成物及び本発明のグラウト材組成物は、混練時の発塵量が少ないので、作業環境の改善にも貢献でき、周辺住民や通行人等の工事現場周辺の人々の健康や安全にも貢献できる。 According to the present invention, since a grout material composition with a small amount of dust generation is obtained, it can be suitably used for both civil engineering work and building construction work. In addition, the grout material composition using the dust suppressant for the grout material composition of the present invention and the grout material composition of the present invention can contribute to the improvement of the working environment because the amount of dust generation during kneading is small. It can also contribute to the health and safety of people around the construction site such as residents and passersby.
Claims (4)
ＨＯ（ＡＯ）ｎＨ ・・・・・・ （１）
（式中ＡＯは炭素数２又は３のオキシアルキレン基を表し、ｎはオキシアルキレン基の平均付加モル数を表す。）
Ｒ（ＯＨ）２ ・・・・・・ （２）
（式中Ｒは炭素数２〜８の炭化水素基を表し、ＯＨはアルコール性ヒドロキシ基を表す。） The dust generation inhibitor for grout material compositions containing 70-90 mass% of alcohols represented by following formula (1) or formula (2), and 30-10 mass% of water.
HO (AO) nH (1)
(In the formula, AO represents an oxyalkylene group having 2 or 3 carbon atoms, and n represents the average number of moles added of the oxyalkylene group.)
R (OH) 2 (2)
(In the formula, R represents a hydrocarbon group having 2 to 8 carbon atoms, and OH represents an alcoholic hydroxy group.)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2020176045A (en) * | 2019-04-16 | 2020-10-29 | 株式会社日本触媒 | Cement additive, cement hardness improver, cement composition, and hardness improvement method of cement composition |
| JP7458200B2 (en) | 2019-04-16 | 2024-03-29 | 株式会社日本触媒 | Additive for cement, strength improver for cement, cement composition, and method for improving the strength of cement composition |
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