JP2012046651A - Grouting material and grouting method - Google Patents
Grouting material and grouting method Download PDFInfo
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- JP2012046651A JP2012046651A JP2010190597A JP2010190597A JP2012046651A JP 2012046651 A JP2012046651 A JP 2012046651A JP 2010190597 A JP2010190597 A JP 2010190597A JP 2010190597 A JP2010190597 A JP 2010190597A JP 2012046651 A JP2012046651 A JP 2012046651A
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- 239000000463 material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title abstract description 32
- 239000004568 cement Substances 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 239000002893 slag Substances 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 19
- 229920000642 polymer Polymers 0.000 claims abstract description 19
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 16
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 12
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 11
- 229940118662 aluminum carbonate Drugs 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000010440 gypsum Substances 0.000 claims description 28
- 229910052602 gypsum Inorganic materials 0.000 claims description 28
- 239000000404 calcium aluminium silicate Substances 0.000 claims description 12
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims description 12
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 claims description 12
- 229940078583 calcium aluminosilicate Drugs 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 12
- 239000000378 calcium silicate Substances 0.000 claims description 2
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 2
- 230000000740 bleeding effect Effects 0.000 abstract description 19
- 238000002156 mixing Methods 0.000 abstract description 10
- 238000004062 sedimentation Methods 0.000 abstract description 7
- 238000001879 gelation Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 2
- 239000011505 plaster Substances 0.000 abstract 2
- 239000005368 silicate glass Substances 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000000725 suspension Substances 0.000 description 15
- 230000035699 permeability Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 7
- 235000013336 milk Nutrition 0.000 description 7
- 239000008267 milk Substances 0.000 description 7
- 210000004080 milk Anatomy 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- -1 silt Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 241000047703 Nonion Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000019000 fluorine Nutrition 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920006173 natural rubber latex Polymers 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920006174 synthetic rubber latex Polymers 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
本発明は、各種土木工事におけるトンネル工事、地盤改良工事や土木工事で用いられる地盤注入及び基礎部の補強等の空隙充填に使用する、注入材及び注入工法に関する。 TECHNICAL FIELD The present invention relates to an injection material and an injection method used for filling a void such as tunnel injection, ground improvement work and civil engineering work in various civil engineering works and ground reinforcement.
従来、セメントを用いた注入工法では、地盤の補強や止水効果および充填効果を得るため、微粉スラグを主成分とした注入材やセメントとカルシウムアルミネ−ト等を含む急硬材を用いた注入材が用いられている（特許文献１、２、３、４参照）。 Conventionally, in the injection method using cement, in order to obtain ground reinforcement, water-stopping effect and filling effect, an injection material using fine powder slag as the main component or a rapid hardening material containing cement and calcium aluminate is used. Materials are used (see Patent Documents 1, 2, 3, and 4).
しかしながら、微粉スラグを使用した注入材は凝結が非常に遅く、注入したミルクが地下水に流され、または、所定の注入位置から流れて逸脱する場合があった。また、この注入材は、粒子の沈降、すなわち、ブリーディングが多く、ミキサ内および圧送ホース内での沈降が生じ、閉塞等のトラブルが生じることがあった。 However, the injecting material using fine powder slag has a very slow setting, and the infused milk may flow into the ground water or flow away from a predetermined pouring position. Moreover, this injection material has many sedimentation of the particles, that is, bleeding, and sedimentation occurs in the mixer and the pumping hose, which may cause troubles such as blockage.
カルシウムアルミネートを使用した急硬性の注入材は、セメントミルクと急硬材スラリーを別々に混練りし、注入直前に混合するので、ミキサやポンプが各２台必要であり、施工性が煩雑という課題があった。また、前記した沈降による閉塞等のトラブルが生じることがあった。
施工性を簡便にすべく、セメントと急硬材を混合し同時練りした場合、硬化時間の制御が難しく、ミキサやポンプを固めてしまうトラブルが発生することがあった。また、地盤が細砂、シルト、あるいは粘土の場合は、浸透性が小さく、注入が不可能となる場合や、空隙充填材として使用する場合、ブリーディングによる表面劣化や、屋外での充填では表面に無数の亀裂が発生する場合があった。さらに、注入の際、ポンプ圧送性の向上や、地盤中への浸透性を増す目的で水量を増す場合があるが、その結果、硬化が遅れ、強度が低くなることがあった。
The quick-hardening injection material using calcium aluminate kneads cement milk and quick-hardening material slurry separately and mixes them immediately before injection, so two mixers and two pumps are required, and the workability is complicated. There was a problem. In addition, troubles such as blockage due to sedimentation may occur.
When cement and a rapid hardening material are mixed and kneaded at the same time in order to simplify the workability, it is difficult to control the setting time, and there may be a problem that the mixer and the pump are hardened. Also, if the ground is fine sand, silt, or clay, the permeability is low and it is impossible to inject, or when used as a void filler, the surface deteriorates due to bleeding, and when filled outdoors, the surface Innumerable cracks may occur. In addition, during the injection, the amount of water may be increased for the purpose of improving the pumpability and increasing the permeability into the ground. As a result, the curing may be delayed and the strength may be lowered.
微粒子セメント、微粒子スラグ、アルミノケイ酸カルシウム、石膏、凝結調整剤、及び減水剤を含有する注入材が提案されている（特許文献５参照）。しかしながら、凝結調整剤、及び減水剤の使用は、硬化時間の制御の難しさや、ブリーディング率が増加する場合があった。 An injection material containing fine particle cement, fine particle slag, calcium aluminosilicate, gypsum, a setting modifier, and a water reducing agent has been proposed (see Patent Document 5). However, the use of a setting modifier and a water reducing agent may cause difficulty in controlling the curing time and increase the bleeding rate.
本発明者は、上記課題を解決すべく種々検討した結果、特定の材料を使用することにより、混練り後にセメントミルクに可塑性を生じ、従来、問題の多かったブリーディング、すなわち、粒子の沈降を無くすことが可能となり、１ショット方式での注入を可能となるという知見を得て本発明を完成するに至った。 As a result of various studies to solve the above problems, the present inventor has produced plasticity in cement milk after kneading by using a specific material, thereby eliminating bleeding that has been problematic in the past, that is, sedimentation of particles. As a result, the present invention has been completed upon obtaining the knowledge that injection by a one-shot method is possible.
すなわち、本発明は、
（１）セメント、高炉水砕スラグ、セメント用ポリマー、アルミノケイ酸カルシウムガラス、石膏、並びに硫酸アルミニウム及び／または炭酸塩を以下の割合で含有してなる注入材。
（Ａ）セメントと高炉水砕スラグの割合が、セメント２０〜８０質量部に対して高炉水砕スラグ８０〜２０質量部
（Ｂ）セメント用ポリマーの使用量が、セメントと高炉水砕スラグの合計１００質量部に対して０．５〜７質量部
（Ｃ）石膏の使用量が、アルミノケイ酸カルシウムガラス１００質量部に対して５０〜２００質量部
（Ｄ）セメントと高炉水砕スラグの合計とアルミノケイ酸カルシウムガラスと石膏の合計の割合が、セメントと高炉水砕スラグの合計９５〜９９．５質量部に対してアルミノケイ酸カルシウムガラスと石膏の合計５〜０．５質量部
（Ｅ）硫酸アルミニウム及び／または炭酸塩の使用量が、セメント、高炉水砕スラグ、アルミノケイ酸カルシウムガラス、及び石膏の合計１００質量部に対して０．０５〜１質量部
（２）平均粒子径が２０μｍ以下である（１）の注入材、
（３）消泡剤を混合してなる（１）または（２）の注入材、
（４）セメント、高炉水砕スラグ、セメント用ポリマー、アルミノケイ酸カルシウムガラス、石膏、並びに硫酸アルミニウム及び／または炭酸塩及び消泡剤を（１）の割合で予め混合し、注入及び充填してなる注入工法、である。
That is, the present invention
(1) An injection material comprising cement, blast furnace granulated slag, cement polymer, calcium aluminosilicate glass, gypsum, and aluminum sulfate and / or carbonate in the following proportions.
(A) The ratio of cement and blast furnace granulated slag is 20 to 80 parts by mass of cement, and 80 to 20 parts by mass of blast furnace granulated slag (B) The amount of cement polymer used is the sum of cement and blast furnace granulated slag The amount of gypsum used is 0.5 to 7 parts by mass with respect to 100 parts by mass. The total proportion of calcium silicate glass and gypsum is 5 to 0.5 parts by mass of (E) aluminum sulfate and calcium aluminosilicate glass and gypsum with respect to 95 to 99.5 parts by mass of cement and blast furnace granulated slag. The amount of carbonate used is 0.05 to 1 part by mass (2 relative to 100 parts by mass in total of cement, granulated blast furnace slag, calcium aluminosilicate glass, and gypsum. Injection material having an average particle diameter of 20μm or less (1),
(3) The injection material according to (1) or (2), which is obtained by mixing an antifoaming agent,
(4) Cement, blast furnace granulated slag, cement polymer, calcium aluminosilicate glass, gypsum, and aluminum sulfate and / or carbonate and antifoaming agent are mixed in advance in the ratio of (1), and injected and filled. Injection method.
本発明の注入材を用いることにより、ブリーディングが少なく、閉塞等のトラブルを無くし、注入または充填後に可塑性を生じ、不要な逸脱を防ぐ、１ショットでの注入が可能という効果が得られる。 By using the injection material of the present invention, it is possible to obtain an effect that injection in one shot is possible with less bleeding, no trouble such as clogging, plasticity after injection or filling, and prevention of unnecessary deviation.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明で使用するセメントは、普通、早強、及び超早強などの各種ポルトランドセメントであり、平均粒子径２０μｍ以下が好ましい。
なお、本発明の粒子径は、レーザ回折式粒度分布測定装置で測定したものである。
The cement used in the present invention is various portland cements such as ordinary, early strength, and very early strength, and preferably has an average particle size of 20 μm or less.
The particle diameter of the present invention is measured with a laser diffraction particle size distribution measuring device.
本発明で使用する高炉水砕スラグは、鉄鋼製造の過程で高炉から排出される溶融状態のスラグを水等で急冷してガラス質にし、粉砕して微粉末化したもので、潜在水硬性を有しており、アルカリの刺激作用により硬化する性質を持つものである。これ以外の、例えば、都市ゴミや下水汚泥等を溶融したスラグ、脱燐スラグ、徐冷スラグなども使用することができる。 The granulated blast furnace slag used in the present invention is obtained by quenching molten slag discharged from the blast furnace in the process of steel production with water or the like to vitreous, pulverizing and pulverizing the latent slag. It has the property of being cured by the stimulating action of alkali. Other than this, for example, slag obtained by melting municipal waste, sewage sludge, etc., dephosphorization slag, slow cooling slag, and the like can also be used.
高炉水砕スラグを含有することで高い注入性と長期強度の発現性が付与される。スラグの粉末度は、好ましくは平均粒子径２０μｍ以下、より好ましくは１０μｍ以下である。２０μｍを超えると、注入時の浸透性が低下することに加え、短・長期の強度発現性の向上を十分に示さない場合がある。 By containing blast furnace granulated slag, high injectability and long-term strength are imparted. The fineness of the slag is preferably an average particle size of 20 μm or less, more preferably 10 μm or less. If it exceeds 20 μm, in addition to the decrease in permeability during injection, there may be cases where the improvement in short- and long-term strength development is not sufficiently exhibited.
セメントと高炉水砕スラグの割合は、セメント２０〜８０質量部に対して高炉水砕スラグ８０〜２０質量であり、セメント３０〜７０質量部に対して高炉水砕スラグ７０〜３０質量部がより好ましい。セメントの使用量が２０質量部未満では短期強度が小さい場合があり、８０質量部を超えると注入材を懸濁液としたときの粘度が大きくなり、浸透性が低下する場合がある。 The ratio of cement and blast furnace granulated slag is 80 to 20 parts by mass of blast furnace granulated slag with respect to 20 to 80 parts by mass of cement, and 70 to 30 parts by mass of granulated blast furnace slag with respect to 30 to 70 parts by mass of cement. preferable. If the amount of cement used is less than 20 parts by mass, the short-term strength may be small. If it exceeds 80 parts by mass, the viscosity when the injection material is used as a suspension may increase, and the permeability may decrease.
本発明のセメント用ポリマーとは、空隙充填においては、硬化体の亀裂防止として耐久性のある地盤改良を可能とする効果を得る。また、施工において、ミキサ、ポンプ、ホース、及び注入管の壁面に、スケールの付着を防ぐものである。
セメント用ポリマー（以下、ポリマーという）としては、水性ポリマーディスバージョン、再乳化形粉末樹脂、水溶性ポリマー、液状ポリマーなどが挙げられるが、特に限定されるものではない。水性ポリマーディスバージョンとしては、天然ゴムラテックスやアクリルゴム、スチレン・ブタジエンゴム（ＳＢＲ）、クロロプレンゴム（ＣＲ）などの合成ゴムラテックスやエチレン・酢酸ビニル共重合体（ＥＶＡ）、ポリアクリル酸エステル（ＰＡＥ）などの樹脂エマルジョンなどが挙げられる。ポリマーの形態としては、再乳化型粉末タイプや液体タイプなどがある。
ポリマーの使用量は、セメントと高炉水砕スラグ(以下、主材という)の合計１００質量部に対して、固形分換算で０．５〜７質量部が好ましくは、１〜５質量部がより好ましい。０．５質量部未満では、空隙充填においては、硬化体の亀裂防止としての抑制、耐久性のある地盤改良の期待ができ無く、７質量部を超えると、長期の強度発現が落ち、その効果の向上が期待できないばかりか経済的でなくなる。
The cement polymer of the present invention has an effect of enabling durable ground improvement as crack prevention of the cured body in filling the gap. In construction, scales are prevented from adhering to the walls of the mixer, pump, hose, and injection pipe.
Examples of the polymer for cement (hereinafter referred to as polymer) include, but are not particularly limited to, an aqueous polymer dispersion, a re-emulsifying powder resin, a water-soluble polymer, and a liquid polymer. Examples of aqueous polymer dispersions include natural rubber latex, acrylic rubber, synthetic rubber latex such as styrene / butadiene rubber (SBR) and chloroprene rubber (CR), ethylene / vinyl acetate copolymer (EVA), and polyacrylic acid ester (PAE). ) And the like. Examples of the polymer form include a re-emulsification type powder type and a liquid type.
The amount of the polymer used is preferably 0.5 to 7 parts by mass, more preferably 1 to 5 parts by mass in terms of solid content with respect to 100 parts by mass in total of cement and blast furnace granulated slag (hereinafter referred to as main material). preferable. If the amount is less than 0.5 part by mass, it is impossible to expect suppression of cracking of the cured product and improvement of the durable ground in filling the gap. Not only can not be expected to improve, but also become economical.
ポリマーの混合方法は、特に限定されるものではないが、粉体の場合、予め主材と混合、若しくは混練り時に他の材料と同時投入するか、水に懸濁又は溶解すること等が挙げられ、液体の場合は、混練り時に他の材料と同時投入するか、水に混合して使用する方法などがある。 The mixing method of the polymer is not particularly limited. However, in the case of powder, it may be mixed with the main material in advance or simultaneously charged with other materials at the time of kneading, or suspended or dissolved in water. In the case of a liquid, there are a method of using it simultaneously with other materials at the time of kneading or mixing with water.
本発明で使用するアルミノケイ酸カルシウム（以下、ＣＡＳという）は、ＣａＯ、Ａｌ２Ｏ３、及びＳｉＯ２を含有するものであり、石膏との併用により主として、セメントミルクに可塑性を生じさせ、緩やかな凝結促進およびブリーディング低下、粒子の沈降防止に寄与するものである。
ＣＡＳの組成は、ＣａＯ含有率２０〜６０質量％、Ａｌ２Ｏ３含有率２０〜７０質量％、及びＳｉＯ２含有率５〜３０質量％が好ましく、ＣａＯ含有率３０〜５５質量％、Ａｌ２Ｏ３含有率３０〜６０質量％、及びＳｉＯ２含有率１０〜２０質量％がより好ましい。この範囲外では短期強度が小さくなる場合がある。
ＣＡＳは、石灰石等のカルシア原料、アルミナ、ボーキサイト、長石、及び粘土などのアルミナ原料、並びに、ケイ石、ケイ砂、石英、及びケイ藻土などのシリカ原料等を所定の割合で配合した後、ロータリーキルン等で焼成、又
は、電気炉や高周波炉等で溶融することにより製造する。
ＣＡＳとしては、２ＣａＯ・Ａｌ２Ｏ３・ＳｉＯ２やＣａＯ・Ａｌ２Ｏ３・２ＳｉＯ２などの結晶性化合物を使用することも可能であるが、短期強度が大きい点で、溶融物を急冷して得られるガラス質のものが好ましい。
ＣＡＳの粉末度は、好ましくは平均粒子径２０μｍ以下で、２０μｍを超えると、セメントミルクの可塑性が低下したり、注入時の浸透性が低下し、短期の強度発現性の向上が不良な場合がある。
Calcium aluminosilicate (hereinafter referred to as CAS) used in the present invention contains CaO, Al 2 O 3 , and SiO 2 , and in combination with gypsum, mainly causes plasticity in cement milk and is mild. It contributes to the acceleration of setting, reduction of bleeding, and prevention of sedimentation of particles.
The composition of CAS is preferably CaO content 20 to 60% by mass, Al 2 O 3 content 20 to 70% by mass, and SiO 2 content 5 to 30% by mass, CaO content 30 to 55% by mass, Al 2. An O 3 content of 30 to 60% by mass and an SiO 2 content of 10 to 20% by mass are more preferable. Outside this range, the short-term strength may be small.
CAS is a mixture of calcia raw materials such as limestone, alumina raw materials such as alumina, bauxite, feldspar, and clay, and silica raw materials such as quartzite, quartz sand, quartz, and diatomaceous earth at a predetermined ratio. Manufactured by firing in a rotary kiln or the like, or melting in an electric furnace or high-frequency furnace.
As CAS, crystalline compounds such as 2CaO · Al 2 O 3 · SiO 2 and CaO · Al 2 O 3 · 2SiO 2 can be used, but the melt is rapidly cooled because of its short-term strength. The glassy thing obtained by these is preferable.
CAS fineness is preferably an average particle diameter of 20 μm or less, and if it exceeds 20 μm, the plasticity of cement milk may decrease, or the permeability during injection may decrease, and the improvement in short-term strength development may be poor. is there.
本発明で使用する石膏としては、無水石膏、半水石膏、及び二水石膏が挙げられる。さらに、天然石膏や、リン酸副生石膏、排脱石膏、及びフッ酸副生石膏などの化学石膏、または、これらを熱処理して得られる石膏など挙げられる。これらの中では、強度発現性が大きい点で無水石膏が好ましい。
石膏の粉末度は、平均粒子径２０μｍ以下で、２０μｍを超えると注入時の浸透性が低下する場合がある。
石膏の使用量は、ＣＡＳ１００質量部に対して、５０〜２００質量部が好ましく、７０〜１５０質量部がより好ましい。５０質量部未満では短期強度が小さい場合があり、２００質量部を超えるとブリーディングが生じる場合がある。
Examples of the gypsum used in the present invention include anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum. Furthermore, natural gypsum, chemical gypsum such as phosphate byproduct gypsum, drainage gypsum, and hydrofluoric acid byproduct gypsum, or gypsum obtained by heat-treating these can be mentioned. Among these, anhydrous gypsum is preferable in terms of high strength development.
The fineness of gypsum is 20 μm or less in average particle diameter, and if it exceeds 20 μm, the permeability during injection may be reduced.
The amount of gypsum used is preferably 50 to 200 parts by mass and more preferably 70 to 150 parts by mass with respect to 100 parts by mass of CAS. If it is less than 50 parts by mass, the short-term strength may be small, and if it exceeds 200 parts by mass, bleeding may occur.
セメントと高炉水砕スラグ（主材）の合計と、ＣＡＳと石膏の合計（以下促進材という）の割合は、主材９５〜９９．５質量部に対して促進材５〜０．５質量部が好ましく、主材９７〜９９質量部に対して促進材３〜１質量部がより好ましい。促進材が０．５質量部未満ではブリーディング防止効果が無く、凝結が遅くなり、短期強度の発現が不良の場合があり、促進材が５質量部を超えると短時間での硬化が発生し、ミキサやポンプを固めてしまい、浸透性が悪くなる場合がある。 The ratio of the sum of cement and blast furnace granulated slag (main material) and the total of CAS and gypsum (hereinafter referred to as the promoter) is 5 to 0.5 parts by mass of the accelerator with respect to 95 to 99.5 parts by mass of the main material. Is preferable, and 3 to 1 part by mass of the accelerator is more preferable with respect to 97 to 99 parts by mass of the main material. If the accelerator is less than 0.5 parts by mass, there is no bleeding prevention effect, the setting is delayed, and the expression of short-term strength may be poor, and if the accelerator exceeds 5 parts by mass, curing will occur in a short time, The mixer and the pump are hardened, and the permeability may deteriorate.
本発明では、さらに、ブリーディングを減じ、可塑性が得られるように、硫酸アルミニウム及び／または炭酸塩(以下、添加剤という)を使用する。 In the present invention, aluminum sulfate and / or carbonate (hereinafter referred to as an additive) is further used so that bleeding is reduced and plasticity is obtained.
本発明で使用する硫酸アルミニウムとしては、無水物と含水物があるが、本発明ではどちらでも使用できる。硫酸アルミニウム無水物は、空気中の水分により潮解するので、保管場所やセメントに吸着する可能性があり、効果が低減しないように吸水しないようにする必要がある。一方、硫酸アルミニウム含水物は吸水力が弱く、比較的作業性や溶解性もよい。
硫酸アルミニウムは溶解性が高いので、その粒子径は大きな問題では無いが、最大粒子径は１ｍｍ以下が好ましい。１ｍｍを越えると溶解性が低下する。
As the aluminum sulfate used in the present invention, there are an anhydride and a hydrate, but either can be used in the present invention. Since aluminum sulfate anhydride is deliquescent by moisture in the air, it may be adsorbed to a storage place or cement, and it is necessary to prevent water absorption so as not to reduce the effect. On the other hand, hydrated aluminum sulfate has a weak water absorption and relatively good workability and solubility.
Since aluminum sulfate has high solubility, its particle size is not a big problem, but the maximum particle size is preferably 1 mm or less. If it exceeds 1 mm, the solubility decreases.
本発明で使用する炭酸塩としては、炭酸ナトリウムや炭酸カリウムが挙げられ、溶解性などから炭酸ナトリウムが好ましい。 Examples of the carbonate used in the present invention include sodium carbonate and potassium carbonate, and sodium carbonate is preferable from the viewpoint of solubility.
硫酸アルミニウムと炭酸塩の使用量は、硫酸アルミニウム０〜１００質量部に対して炭酸塩１００〜０質量部、好ましくは、硫酸アルミニウム３０〜１００質量部に対して炭酸塩７０〜０質量部である。 The amount of aluminum sulfate and carbonate used is 100 to 0 parts by mass with respect to 0 to 100 parts by mass of aluminum sulfate, and preferably 70 to 0 parts by mass with respect to 30 to 100 parts by mass of aluminum sulfate. .
添加剤の使用量は、水比に応じて調整するため特に限定されるものではないが、セメント、高炉水砕スラグ、アルミノケイ酸カルシウムガラス、及び石膏の合計１００質量部に対して、０．０５〜１質量部、０．１〜０．７質量部がより好ましい。０．０５質量部未満ではブリーディング防止や可塑性の確保がしにくい場合があり、１質量部を超えると凝結時間が短くなり、注入に不具合が生ずる場合がある。 The amount of the additive used is not particularly limited because it is adjusted according to the water ratio, but is 0.05 with respect to a total of 100 parts by mass of cement, blast furnace granulated slag, calcium aluminosilicate glass, and gypsum. -1 mass part and 0.1-0.7 mass part are more preferable. If the amount is less than 0.05 parts by mass, it may be difficult to prevent bleeding and ensure the plasticity. If the amount exceeds 1 part by mass, the setting time may be shortened, which may cause problems in injection.
本発明では、消泡剤を使用することにより、ポリマーの種類による泡立ちを抑えることが可能となる。
本発明で使用する消泡剤としては、シリコーン系、ノニオン系、アルコール系、脂肪酸、エーテル、脂肪酸エステル、リン酸エステル、ポリエーテル系、及びフッ素系などが挙げられる。
具体的には、シリコーン系は、オイル型若しくはそのオイル型をトルエンなどの溶剤で溶かした溶液型、シリコーンオイルに無機質の微粉末を添加したコンパウンド型、並びに、各種の乳化剤を用いたエマルジョン型などが挙げられ、消泡効果やセメントモルタル物性面からシリコーン系やノニオン系が好ましい。
消泡剤の使用量は、通常、主材１００質量部に対して、０．５質量部以下が好ましく、０．０５〜０．３質量部がより好ましい。０．５質量部を超えるとセメントミルク中の空気量の低減効果の向上が期待できないばかりか、短期強度や長期強度が低下する場合がある。
消泡剤の混合方法は、コンパウンド型を予め、主材と混合するか、若しくは主材混練り時にセメントミルクに混合する方法いずれでも可能である。
In this invention, it becomes possible to suppress foaming by the kind of polymer by using an antifoamer.
Examples of the antifoaming agent used in the present invention include silicones, nonions, alcohols, fatty acids, ethers, fatty acid esters, phosphate esters, polyethers, and fluorines.
Specifically, the silicone type includes an oil type or a solution type obtained by dissolving the oil type with a solvent such as toluene, a compound type obtained by adding inorganic fine powder to silicone oil, and an emulsion type using various emulsifiers. In view of the defoaming effect and the physical properties of cement mortar, silicone type and nonionic type are preferable.
The amount of the antifoaming agent is usually preferably 0.5 parts by mass or less, more preferably 0.05 to 0.3 parts by mass with respect to 100 parts by mass of the main material. If it exceeds 0.5 parts by mass, not only the improvement effect of reducing the amount of air in the cement milk cannot be expected, but the short-term strength and long-term strength may decrease.
As a method of mixing the antifoaming agent, either a method in which the compound mold is mixed with the main material in advance or mixed with cement milk at the time of kneading the main material can be used.
注入材を懸濁液とする場合の水の使用量は、ポンプで圧送できれば特に限定されるものではないが、主材１００質量部に対して、８０〜３００質量部が好ましく、１００〜２００質量部がより好ましい。８０質量部未満では懸濁液の粘度が高くなり、浸透性や充填性が小さくなる場合があり、３００質量部を超えるとブリーディングを抑えることが難しく、凝結が極端に遅れ、硬化しない場合がある。 The amount of water used when the injection material is made into a suspension is not particularly limited as long as it can be pumped with a pump, but is preferably 80 to 300 parts by mass, and 100 to 200 parts by mass with respect to 100 parts by mass of the main material. Part is more preferred. If the amount is less than 80 parts by mass, the viscosity of the suspension may increase, and the permeability and fillability may decrease. If the amount exceeds 300 parts by mass, it is difficult to suppress bleeding, and the setting may be extremely delayed and may not be cured. .
本発明では、地盤中への浸透性を向上させるため、減水剤を使用することが可能である。
減水剤としては、ナフタレンスルホン酸ホルマリン縮合物塩系、リグニンスルホン酸系、メラミンスルホン酸ホルマリン縮合物塩系、ポリカルボン酸塩系、及びポリエ−テル系の高性能減水剤が挙げられる。
減水剤の使用量は、注入材１００質量部に対して、固形分概算で１質量部以下が好ましい。ただし、減水剤の使用は、ブリーディング過多の原因となるので、使用に際しては、水比の管理や施工法等に注意を払う必要がある。
In the present invention, a water reducing agent can be used to improve the permeability into the ground.
Examples of the water reducing agent include naphthalenesulfonic acid formalin condensate salt-based, lignin sulfonic acid-based, melamine sulfonic acid formalin condensate salt-based, polycarboxylate-based, and polyether-based high-performance water reducing agents.
As for the usage-amount of a water reducing agent, 1 mass part or less is preferable by solid content approximation with respect to 100 mass parts of injection materials. However, since the use of water reducing agents causes excessive bleeding, it is necessary to pay attention to the management of water ratio and construction method, etc. when using it.
注入材の練り混ぜ方法や注入・流し込み方法は、特に限定されるものではない。注入管の種類により、単管ロット工法、単管ストレーナー工法、二重管単相工法、二重管複相工法、二重管ダブルパッカ−工法など、現在使用されている工法に適用可能である。 There are no particular limitations on the method of mixing the injection material and the method of injection and pouring. Depending on the type of injection pipe, it can be applied to currently used construction methods such as single-pipe lot method, single-pipe strainer method, double-pipe single-phase method, double-pipe double-phase method, double-pipe double packer method.
懸濁液を地盤内に注入する方法の違いにより、１ショット方式、１．５ショット方式、２ショット方式に適用可能である。１ショット方式とは、本発明の１材状態の懸濁液を圧送して地盤に注入する方式である。１．５ショット方式は、主材と硬化材をポンプで個別に注入管に送り、注入管の頭部で２材を混合し、混合した懸濁液を注入管の先端から吐出して地盤に注入する方式である。２ショット方式とは、１．５ショット方式と同様に、主材と急硬材をポンプで個別に注入管に送り、注入管の先端から吐出される瞬間に２材を混合する方式である。本発明は、１材状態のゲル化時間を確保でき、ミキサやポンプを固めないので、１ショット方式に適用できる。１ショット方式の場合、ミキサやポンプが１台で済み、施工性が簡便という利点を有する。
注入材の凝結時間は、限定されるものではないが、６０分以上が好ましく、６０分から１８０分がより好ましい、６０分未満だと、機械のトラブルによる注入管の閉塞や、充填性や注入性が不良となる場合が発生し、１８０分を超えるとブリーディングが多くなる場合がある。
Depending on the method of injecting the suspension into the ground, it can be applied to the 1-shot system, 1.5-shot system, and 2-shot system. The one-shot method is a method in which a one-material suspension of the present invention is pumped and injected into the ground. In the 1.5 shot method, the main material and the hardener are individually pumped to the injection tube, the two materials are mixed at the head of the injection tube, and the mixed suspension is discharged from the tip of the injection tube to the ground. This is an injection method. The two-shot method is a method in which the main material and the quick-hardening material are individually sent to the injection tube by a pump and the two materials are mixed at the moment of being discharged from the tip of the injection tube, as in the 1.5-shot method. The present invention can be applied to the one-shot method because it can ensure the gelation time in one material state and does not harden the mixer or pump. In the case of the one-shot method, only one mixer or pump is required, and there is an advantage that workability is simple.
The setting time of the injection material is not limited, but is preferably 60 minutes or more, more preferably from 60 minutes to 180 minutes. May become defective, and bleeding may increase when the time exceeds 180 minutes.
以下、実験例により本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail by experimental examples.
「実験例１」
セメント１００質量部に対して高炉水砕スラグ１００質量部の割合で配合した主材を９９質量部と、ＣＡＳ１００質量部に対して石膏１００質量部の割合で配合した促進材を１質量部とからなる注入材１００質量部において、主材１００質量部に対して、ポリマー２．５質量部と消泡剤０．０５質量部とを混合し、さらに、主材と促進材からなる注入材１００質量部に対して表１に示す添加剤と、主材１００質量部に対して水１５０質量部を混合し、懸濁液を作製した。
懸濁液を作製後、ブリーディングおよび凝結時間の測定を行った。結果を表１に示した。
"Experiment 1"
From 99 parts by weight of the main material blended at a ratio of 100 parts by weight of granulated blast furnace slag to 100 parts by weight of cement, and from 1 part by weight of an accelerator blended at a ratio of 100 parts by weight of gypsum to 100 parts by weight of CAS In 100 parts by mass of the injection material, 100 parts by mass of the main material is mixed with 2.5 parts by mass of the polymer and 0.05 part by mass of the antifoaming agent, and further 100 parts by mass of the injection material consisting of the main material and the accelerator. 150 parts by mass of water was mixed with 100 parts by mass of the additive shown in Table 1 and 100 parts by mass of the main material to prepare a suspension.
After preparing the suspension, bleeding and setting time were measured. The results are shown in Table 1.
＜使用材料＞
セメント：早強ポルトランドセメント
高炉水砕スラグ：高炉水砕スラグ粉砕品、平均粒子径８μｍ
ＣＡＳ：ＣａＯ＝４５質量％、Ａｌ２Ｏ３＝４０質量％、及びＳｉＯ２＝１５質量％のガラス化率９５％、平均粒子径７μｍ
石膏：天然無水石膏粉砕品、平均粒子径１１μｍ
ポリマー：酢酸ビニル・バーサティック酸ビニル・アクリル共重合体粉末状樹脂、ＷＲ４６０００（ＥＬＯＴＥＸ社製）
硫酸アルミニウム：市販品、含水物（１６水塩）
炭酸ナトリウム：市販品
消泡剤：アデカネートＢ−１１５Ｆ（（株）ＡＤＥＫＡ社製）、ノニオン系
水：水道水
<Materials used>
Cement: Hayashi Portland cement blast furnace granulated slag: Blast furnace granulated slag pulverized product, average particle size 8μm
CAS: Vitrification rate of CaO = 45 mass%, Al 2 O 3 = 40 mass%, and SiO 2 = 15 mass%, 95%, average particle diameter 7 μm
Gypsum: natural anhydrous gypsum pulverized product, average particle size 11 μm
Polymer: vinyl acetate / vinyl versatate / acrylic copolymer powder resin, WR46000 (manufactured by Elotex)
Aluminum sulfate: commercial product, water-containing product (16 hydrate)
Sodium carbonate: Commercially available antifoaming agent: Adecanate B-115F (manufactured by ADEKA), nonionic water: tap water
＜測定方法＞
粒子径：レーザ回折／散乱式粒度分布測定装置、型式ＬＡ−９２０、堀場製作所社製
ブリーディング率：ＪＳＣＥ−Ｆ ５２２「プレパックドコンクリートの注入モルタルのブリーディン
グ率および膨張率試験方法（ポリエチレン袋法）」に準じ、３時間後に測定。
凝結時間：懸濁液をカップに入れてから、懸濁液を入れたカップを傾けた時点で、懸濁液表面に粘度上
昇による「しわ」が出来る状態までの時間。
<Measurement method>
Particle size: Laser diffraction / scattering type particle size distribution measuring device, model LA-920, HORIBA, Ltd. Breeding rate: JSCE-F 522 “Testing method for bleeding rate and expansion rate of pre-packed concrete injection mortar (polyethylene bag method)” Measured after 3 hours.
Setting time: The time from when the suspension is put into the cup to when the cup containing the suspension is tilted until the surface of the suspension is wrinkled due to an increase in viscosity.
表１より、添加剤を混和することによりブリーディング率が抑えられることが分かる。また、凝結時間が調整されることが分かる。 From Table 1, it can be seen that the bleeding rate can be suppressed by mixing the additive. It can also be seen that the setting time is adjusted.
「実験例２」
表２に示すように、主材と促進材の配合割合を変えた注入材を使用し、懸濁液を作製したこと以外は、実験例１と同様に懸濁液を作製し、試験を実施した。結果を表２に示した。
"Experimental example 2"
As shown in Table 2, a suspension was prepared and tested in the same manner as in Experimental Example 1 except that an injection material having a different mixing ratio of the main material and the accelerator was used and a suspension was prepared. did. The results are shown in Table 2.
表２より、本願発明の主材と促進材の配合割合において、ブリーディング率が抑えられることが分かる。また、凝結時間が調整されることが分かる。 From Table 2, it can be seen that the bleeding rate is suppressed in the blending ratio of the main material and the promoter of the present invention. It can also be seen that the setting time is adjusted.
「実験例３」
表３に示すように、ポリマーの添加量（固形分換算）と消泡剤の使用量を変えたこと以外は、実験例１と同様に懸濁液を作製し、試験を実施した。結果を表３に示す。
"Experiment 3"
As shown in Table 3, a suspension was prepared and tested in the same manner as in Experimental Example 1, except that the amount of polymer added (in terms of solid content) and the amount of antifoaming agent used were changed. The results are shown in Table 3.
＜測定方法＞
クラック発生時期と量：３０×３０ｃｍのコンクリート板に厚さ５ｍｍに懸濁液を流し込み、２０℃−６０％ＲＨ恒温恒湿室で養生し、クラックの発生日（打設後の日数）と材齢７日でのクラック本数を観察した。
<Measurement method>
Time and amount of cracks: A 30 mm x 30 cm concrete plate was poured into a 5 mm thick suspension, cured in a constant temperature and humidity chamber at 20 ° C-60% RH, and the crack occurrence date (days after placement) and material The number of cracks at 7 days of age was observed.
表３より、本願発明において、クラックの発生日が遅く、クラックの発生本数が少ないことが分かる。 From Table 3, it can be seen that in the present invention, the date of occurrence of cracks is late and the number of cracks generated is small.
本発明の注入材は、ブリーディングが抑制されるため、沈降による施工時の閉塞等のトラブルが無く、１材状態でのゲル化時間を確保できるので、１ショット方式での注入および流し込みが可能となる。また、コンクリート基礎部等に流し込んだ、本発明品は、表面状態が良好（クラックの発生が少なく）で、基礎部との一体化が可能となり、長期耐久性に優れた効果が得られる。 Since the injection material of the present invention suppresses bleeding, there is no trouble such as clogging during construction due to sedimentation, and the gelation time in one material state can be secured, so that injection and pouring in a one-shot method are possible. Become. In addition, the product of the present invention poured into a concrete foundation or the like has a good surface state (low occurrence of cracks), can be integrated with the foundation, and has an excellent long-term durability.
Claims (4)
（Ａ）セメントと高炉水砕スラグの割合が、セメント２０〜８０質量部に対して高炉水砕スラグ８０〜２０質量部
（Ｂ）セメント用ポリマーの使用量が、セメントと高炉水砕スラグの合計１００質量部に対して０．５〜７質量部
（Ｃ）石膏の使用量が、アルミノケイ酸カルシウムガラス１００質量部に対して５０〜２００質量部
（Ｄ）セメントと高炉水砕スラグの合計とアルミノケイ酸カルシウムガラスと石膏の合計の割合が、セメントと高炉水砕スラグの合計９５〜９９．５質量部に対してアルミノケイ酸カルシウムガラスと石膏の合計５〜０．５質量部
（Ｅ）硫酸アルミニウム及び／または炭酸塩の使用量が、セメント、高炉水砕スラグ、アルミノケイ酸カルシウムガラス、及び石膏の合計１００質量部に対して０．０５〜１質量部 An injection material comprising cement, granulated blast furnace slag, cement polymer, calcium aluminosilicate glass, gypsum, and aluminum sulfate and / or carbonate in the following proportions.
(A) The ratio of cement and blast furnace granulated slag is 20 to 80 parts by mass of cement, and 80 to 20 parts by mass of blast furnace granulated slag (B) The amount of cement polymer used is the sum of cement and blast furnace granulated slag The amount of gypsum used is 0.5 to 7 parts by mass with respect to 100 parts by mass. The total amount of cement and blast furnace granulated slag is 50 to 200 parts by mass with respect to 100 parts by mass of calcium aluminosilicate glass. The total proportion of calcium silicate glass and gypsum is 5 to 0.5 parts by mass of (E) aluminum sulfate and calcium aluminosilicate glass and gypsum with respect to 95 to 99.5 parts by mass of cement and blast furnace granulated slag. The amount of carbonate used is 0.05 to 1 part by mass with respect to a total of 100 parts by mass of cement, granulated blast furnace slag, calcium aluminosilicate glass, and gypsum.
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| JP2017190652A (en) * | 2016-04-15 | 2017-10-19 | 株式会社菱晃 | Inner pipe back-filler material |
| JP2019043812A (en) * | 2017-09-01 | 2019-03-22 | デンカ株式会社 | Powder rapid hardening agent, cement composition, spray concrete composition, and mine tunnel structure |
| JP7146024B2 (en) | 2017-01-17 | 2022-10-03 | マクセル株式会社 | Method for manufacturing plated parts |
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| JP7146024B2 (en) | 2017-01-17 | 2022-10-03 | マクセル株式会社 | Method for manufacturing plated parts |
| JP2019043812A (en) * | 2017-09-01 | 2019-03-22 | デンカ株式会社 | Powder rapid hardening agent, cement composition, spray concrete composition, and mine tunnel structure |
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