JP5423959B2 - Fast-hardening injection material using fast-curing material for injection material - Google Patents
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- 239000000463 material Substances 0.000 title claims description 77
- 238000002347 injection Methods 0.000 title claims description 48
- 239000007924 injection Substances 0.000 title claims description 48
- 239000000843 powder Substances 0.000 claims description 45
- 239000002245 particle Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000004568 cement Substances 0.000 claims description 28
- 239000008267 milk Substances 0.000 claims description 25
- 210000004080 milk Anatomy 0.000 claims description 25
- 235000013336 milk Nutrition 0.000 claims description 25
- 239000011398 Portland cement Substances 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 16
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 15
- 230000035699 permeability Effects 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 14
- 239000010440 gypsum Substances 0.000 claims description 12
- 229910052602 gypsum Inorganic materials 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000003607 modifier Substances 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims 1
- 239000011230 binding agent Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 3
- -1 alkali metal salt Chemical class 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000011975 tartaric acid Substances 0.000 description 3
- 235000002906 tartaric acid Nutrition 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 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
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229940044172 calcium formate Drugs 0.000 description 1
- 235000019255 calcium formate Nutrition 0.000 description 1
- 239000004281 calcium formate Substances 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Classifications
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- 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)
Description
本発明は、注入材用の速硬化材を用いた超速硬性の注入材に関する。詳しくは、地盤や岩盤など、例えば、トンネル、ダム、貯水池などの堰堤の亀裂、堤体基礎岩盤、マンホール周辺部などの漏水箇所に注入し、止水可能な超速硬性を有する注入材用の速硬化材およびこれを用いた速硬化性注入材に関し、注入後５分から６０分の任意の短時間で硬化するとともに、透水係数が小さい地盤や岩盤にも良好に浸透し、注入体の強度発現性も良好な速硬化材、およびこれを用いた速硬性注入材に関する。
The present invention relates to an ultrafast hardening injection material using a quick-curing material for injection material. Specifically, it can be injected into ground and bedrock, for example, cracks in dams such as tunnels, dams, and reservoirs, dam body foundation rocks, manholes and other leaked parts, and can be used for injection materials with ultra-fast hardness that can stop water. About hardened material and fast-curing injectable material using the same, it hardens in any short time from 5 to 60 minutes after injection, and penetrates well into the ground and rocks with low hydraulic conductivity, and the strength of the injected body The present invention also relates to a good fast-curing material and a fast-hardening injecting material using the same.
地盤や岩盤などの軟弱箇所や漏水箇所には速硬性材料を注入して止水工事が行われる。この速硬性注入材として、従来、以下の注入材が知られている。 Water-stopping work is carried out by injecting fast-hardening materials into soft places such as the ground and bedrock and water leaks. Conventionally, the following injection materials are known as this quick-hardening injection material.
（イ）急硬性スラリー（カルシウムアルミネート、石膏、凝結調整剤）と非急硬性スラリー（セメント、スラグ）の二液混合による地盤注入材が知られている（特開２００６−１６４５３号公報）。
（ロ）アルミナセメントを除く水硬性スラリー(Ａ液)とアルミナセメントおよび石膏からなる速硬材液(Ｂ液)を混合して用いる土質安定用薬液が知られている（特開平０７−１１８６３５号公報）。
(A) A ground injection material by two-component mixing of a rapid hardening slurry (calcium aluminate, gypsum, a setting regulator) and a non-quick hardening slurry (cement, slag) is known (Japanese Patent Laid-Open No. 2006-16453).
(B) A soil-stabilizing chemical solution using a mixture of a hydraulic slurry excluding alumina cement (liquid A) and a quick-hardening material liquid (liquid B) made of alumina cement and gypsum is known (Japanese Patent Laid-Open No. 07-118635). Publication).
しかし、上記地盤注入材(イ)および地盤注入薬液(ロ)は、何れも、例えば０.１MPaの圧力で地盤に圧入する場合、透水係数が大きな地盤（例えば、透水係数１０×１０-2cm/秒以上）には良好な浸透性を示すものの、透水係数がこれより小さい地盤には良好な浸透性が得られず、岩盤中の５００μm以下の狭隘な隙間には注入できないという問題がある。 However, both the above-mentioned ground injecting material (a) and ground injecting chemical solution (b) have a large permeability coefficient (for example, a permeability coefficient of 10 × 10 −2 cm) when pressed into the ground at a pressure of 0.1 MPa, for example. However, there is a problem in that it cannot be injected into a narrow gap of 500 μm or less in the rock, although it shows good permeability at lower than (second / second).
（ハ）最大粒径１２μｍ以下またはブレーン比表面積10000〜20000cm2/gの何れかの粒度を有する高炉スラグ微粉末を主成分とする水硬性材料微粉末に分散剤および水を混合した微粉末水硬性材料スラリー(Ａ)と、最大粒径４５μｍ以下であって８５％粒径２５μｍ以下のカルシウムアルミネート組成物に石膏、水酸化カルシウム、酸化カルシウムのうちの一種又は二種以上、および凝結調整剤を混合した超速硬性混和材を水で混練した超速硬性混和材スラリー(Ｂ)の二液を注入開始時に混合する超速硬型注入材が知られている（特開２００１−２３４１６７号公報）。 (C) Fine powder water in which a dispersant and water are mixed with a fine powder of a hydraulic material whose main component is a fine powder of blast furnace slag having a maximum particle size of 12 μm or less or a Blaine specific surface area of 10000 to 20000 cm 2 / g Hard material slurry (A), calcium aluminate composition having a maximum particle size of 45 μm or less and an 85% particle size of 25 μm or less, gypsum, calcium hydroxide, one or more of calcium oxide, and a coagulation modifier There is known an ultra-fast hard mold injection material in which two liquids of an ultra-fast hard admixture slurry (B) obtained by kneading an ultra-fast hard admixture mixed with water at the start of injection (Japanese Patent Laid-Open No. 2001-234167).
上記超速硬型注入材は、ゲルタイムを１０分以内に制御することができる利点を有しているが、硬化後の強度が低く、材齢７日、２８日の一軸圧縮強度は超微粒子セメント注入材の１／６程度であり、サンドゲルの一軸圧縮強度も材齢２８日で１N/mm2未満である。 The above super-hard mold injection material has the advantage that the gel time can be controlled within 10 minutes, but the strength after curing is low, and the uniaxial compressive strength at the age of 7 days and 28 days is the injection of ultrafine cement. The uniaxial compressive strength of the sand gel is less than 1 N / mm 2 at the age of 28 days.
本発明は、速硬性注入材において、従来の上記問題を解決したものであり、注入後５分から６０分の任意の短時間で硬化し、かつ、透水係数が小さい地盤（例えば、透水係数１０×１０-2cm/秒未満）や微細な岩盤のひび割れにも良好に浸透し、注入体の強度発現性も良好な速硬性注入材を提供するものである。 The present invention solves the above-mentioned conventional problems in a fast-curing injectable material, which is cured in an arbitrary short time of 5 to 60 minutes after injection and has a small water permeability coefficient (for example, a water permeability coefficient of 10 × 10-2 cm / second) and a fast-curing injection material that penetrates well into cracks in fine rocks and has good strength development of the injected body.
本発明は、以下の構成を有することによって上記課題を解決した注入材用の速硬化材を用いた速硬性注入材に関する。
〔１〕カルシウムアルミネート粉末、石膏、凝結調整剤、およびポルトランドセメントを含み、該ポルトランドセメントがＣ 3 Ａ含有量９重量％以上であってブレーン比表面積１００００cm 2 /ｇ以上、および最大粒径１２μmの微粉末であり、該ポルトランドセメントの含有量がカルシウムアルミネート粉末、石膏、および凝結調整剤の合量１００重量部に対して５０〜４００重量部である速硬化材を用い、該速硬化材１００重量部に対して水を１００〜１０００重量部を混合してなる硬化促進スラリーと、高炉スラグ微粉末、アルカリ刺激剤、および分散剤に水を加えてなるセメントミルクとを混合してなることを特徴とする速硬性注入材。
〔２〕上記[１]に記載する速硬性注入材において、セメントミルクがＣ3Ａ含有量９重量％以上であってブレーン比表面積１００００cm2/ｇ以上および最大粒径１２μmのポルトランドセメント微粉末を含有する速硬性注入材。
〔３〕上記[２]に記載する速硬性注入材において、セメントミルクのポルトランドセメント微粉末含有量が高炉スラグ微粉末１００重量部に対して１０重量部以下である速硬性注入材。
〔４〕透水係数１０×１０-3cm/秒〜１０×１０-2cm/秒の砂充填層に対して、０.１MPaの圧力で注入したときの注入深さが４５cm以上である上記[１]〜上記[３]の何れかに記載する速硬性注入材。
〔５〕注入地盤の硬化部分について材齢７日における一軸圧縮強度が１N/mm2以上である上記[１]〜上記[４]の何れかに記載する速硬性注入材。
The present invention relates to a quick-hardening injecting material using a quick -curing material for an injecting material that has solved the above problems by having the following configuration.
[1] Calcium aluminate powder, gypsum, setting modifier, and Portland cement, the Portland cement having a C 3 A content of 9% by weight or more, a Blaine specific surface area of 10,000 cm 2 / g or more, and a maximum particle size of 12 μm fine powder and is, calcium aluminate powder content of the Portland cement, gypsum, and fast curing material is 50-400 parts by weight relative to the total amount 100 parts by weight of the condensation modifier used, the fast-curing material Mixing a hardening accelerating slurry obtained by mixing 100 to 1000 parts by weight of water with 100 parts by weight, and cement milk obtained by adding water to blast furnace slag fine powder, an alkali stimulant, and a dispersant. Quick-hardening injection material characterized by
[2] The fast-curing grout that described in [1], a Portland cement powder cement milk C 3 A is A content 9 wt% or more Blaine specific surface area of 10000 cm 2 / g or more and a maximum particle size of 12μm Contains quick-hardening injection material.
[3] The fast-hardening injecting material according to [2], wherein the Portland cement fine powder content of the cement milk is 10 parts by weight or less with respect to 100 parts by weight of the blast furnace slag fine powder.
[4] The above-mentioned injection depth is 45 cm or more when injected at a pressure of 0.1 MPa into a sand packed bed having a water permeability of 10 × 10 −3 cm / sec to 10 × 10 −2 cm / sec . [1] The fast-curing injection material according to any one of [3] above .
[5] The fast-hardening injecting material according to any one of [1] to [4] , wherein the uniaxial compressive strength at 7 days of age is 1 N / mm 2 or more with respect to a cured portion of the injecting ground.
本発明の速硬性注入材は、速硬化成分のカルシウムアルミネートの一部が最大粒径１２μmのポルトランドセメント微粉末で置換されているので、注入スラリーに含まれる硬化成分粒子が微細化し、透水係数の小さい地盤や、岩盤の微細ひび割れに対して深く注入することができる。 In the fast-curing injection material of the present invention, a part of the calcium aluminate, which is a fast-curing component, is replaced with a fine powder of Portland cement having a maximum particle size of 12 μm. It is possible to inject deeply into small grounds and fine cracks in rocks.
従来の注入材は、速硬成分としてカルシウムアルミネートと石膏を主成分としている。一般に、１２ＣａＯ・７Ａｌ2Ｏ3〔Ｃ12Ａ7〕やＣａＯ・Ａｌ2Ｏ3〔ＣＡ〕に代表されるカルシウムアルミネート系のクリンカーは硬いため、最大粒径２５μm以下に微細化するのが難しい。このため、注入材スラリー中の懸濁物質の粒度分布において、粒径２５μｍ以上の粒子径の比率が大きくなり、これが透水係数の小さい地盤や微細な岩盤のひび割れに対する注入性を阻害する原因になっている。 Conventional injection materials are mainly composed of calcium aluminate and gypsum as fast-hardening components. In general, calcium aluminate-based clinker represented by 12CaO.7Al 2 O 3 [C 12 A 7 ] and CaO.Al 2 O 3 [CA] is hard, so it is difficult to reduce the particle size to a maximum particle size of 25 μm or less. . For this reason, in the particle size distribution of the suspended solids in the injecting material slurry, the ratio of the particle size of 25 μm or more is increased, which causes the impediment to the cracking of the ground with a small hydraulic conductivity and fine rock mass. ing.
一方、本発明の速硬化材は、Ｃ12Ａ7やＣＡのカルシウムアルミネートの一部が最大粒径１２μmのポルトランドセメント微粉末で置換されているので、注入材スラリー中の懸濁物質の粒度分布において、２５μｍ以上の粒子径の比率が小さくなり、透水係数の小さい地盤や微細な岩盤へのひび割れに対する注入性を高めることができる。具体的には、例えば、透水係数１０×１０-3cm/秒〜１０×１０-2cm/秒の砂充填層に対して、０.１MPaの圧力で注入したときの注入深さが４５cm以上である。 On the other hand, in the fast-curing material of the present invention, part of C 12 A 7 or CA calcium aluminate is replaced with fine Portland cement powder having a maximum particle size of 12 μm. In the distribution, the ratio of particle diameters of 25 μm or more becomes small, and the injection property against cracks in the ground having a low water permeability coefficient or fine rock can be improved. Specifically, for example, when a sand filling layer having a water permeability of 10 × 10 −3 cm / second to 10 × 10 −2 cm / second is injected at a pressure of 0.1 MPa, the injection depth is 45 cm or more. It is.
また、本発明の速硬化材に含まれるポルトランドセメント微粉末はＣ3Ａ含有量が９重量％以上であるので、その微粉化によって活性が高まり、注入部分の硬化強度を向上することができる。 In addition, since the Portland cement fine powder contained in the rapid-curing material of the present invention has a C 3 A content of 9% by weight or more, the activity is increased by the pulverization and the hardening strength of the injection portion can be improved.
以下、本発明を実施形態に基づいて具体的に説明する。
本発明の速硬性注入材は、カルシウムアルミネート粉末、石膏、凝結調整剤、およびポルトランドセメント微粉末を含み、該ポルトランドセメントがＣ3Ａ含有量９重量％以上であって最大粒径１２μｍの微粉末である速硬化材を用い、該速硬化材１００重量部に対して水を５０〜１０００重量部を混合してなる硬化促進スラリーと、高炉スラグ微粉末、アルカリ刺激剤、および分散剤に水を加えてなるセメントミルクとを混合してなることを特徴とする速硬性注入材である。
Hereinafter, the present invention will be specifically described based on embodiments.
The quick-hardening injecting material of the present invention contains calcium aluminate powder, gypsum, a setting modifier, and Portland cement fine powder. The Portland cement has a C 3 A content of 9% by weight or more and a maximum particle size of 12 μm. Using a fast-curing material that is powder, water is added to a curing accelerating slurry obtained by mixing 50 to 1000 parts by weight of water with 100 parts by weight of the fast-curing material , blast furnace slag fine powder, alkali stimulant, and dispersant. It is a quick-hardening injection material characterized by being mixed with cement milk to which is added.
本発明の速硬化材に含まれるカルシウムアルミネートはＣ12Ａ7、またはＣＡ、あるいはこれらの混合物を用いることができる。カルシウムアルミネートはブレーン比表面積４０００cm2/ｇ以上、最大粒径２５μm以下の粉末が好ましい。 As the calcium aluminate contained in the fast-curing material of the present invention, C 12 A 7 , CA, or a mixture thereof can be used. The calcium aluminate is preferably a powder having a specific surface area of 4000 cm 2 / g or more and a maximum particle size of 25 μm or less.
本発明の速硬化材に含まれる石膏は、無水石膏が好ましく、ブレーン比表面積１００００cm2/ｇ以上、最大粒径１１μm以下の微粉末が好ましい。 The gypsum contained in the fast-curing material of the present invention is preferably anhydrous gypsum, and is preferably a fine powder having a Blaine specific surface area of 10,000 cm 2 / g or more and a maximum particle size of 11 μm or less.
本発明の速硬化材に含まれる凝結調整剤は、アルカリ刺激剤として炭酸ナトリウム、硫酸ナトリウム、アルミン酸ナトリウム、クエン酸ナトリウム、炭酸リチウム、蟻酸カルシウムなどのアルカリ金属塩、アルカリ土類金属塩を用いることができ、硬化遅延剤として酒石酸、グルコン酸、クエン酸などのオキシカルボン酸の単独または複数の混合物を用いることができる。例えば、炭酸ナトリウムと酒石酸の等量混合物を用いることができる。 The setting modifier contained in the fast-curing material of the present invention uses an alkali metal salt or alkaline earth metal salt such as sodium carbonate, sodium sulfate, sodium aluminate, sodium citrate, lithium carbonate, calcium formate as an alkali stimulant. As the retarder, one or a mixture of oxycarboxylic acids such as tartaric acid, gluconic acid and citric acid can be used. For example, an equivalent mixture of sodium carbonate and tartaric acid can be used.
本発明の速硬化材はポルトランドセメント微粉末を含む。該ポルトランドセメント微粉末は、Ｃ3Ａ含有量が９重量％以上であって、ブレーン比表面積１００００cm2/ｇ以上、最大粒径１２μmの微粉末である。具体的には、例えば、Ｃ3Ａ含有量が１１.５重量％、ブレーン比表面積１０５００cm2/ｇ、最大粒径１２μmの早強ポルトランドセメントなどが用いられる。 The fast-curing material of the present invention contains Portland cement fine powder. The Portland cement fine powder is a fine powder having a C 3 A content of 9% by weight or more, a Blaine specific surface area of 10,000 cm 2 / g or more, and a maximum particle size of 12 μm. Specifically, for example, early strong Portland cement having a C 3 A content of 11.5% by weight, a Blaine specific surface area of 10500 cm 2 / g, and a maximum particle size of 12 μm is used.
本発明の速硬化材において、各成分の含有量は、カルシウムアルミネート１００重量部に対して、石膏は５０〜２００重量部、凝結調整剤は１０〜４０重量部が好ましい。上記ポルトランドセメント微粉末の含有量は、カルシウムアルミネート粉末、石膏、凝結調整剤の合量１００重量部に対して５０〜４００重量部が好ましい。 In the quick-curing material of the present invention, the content of each component is preferably 50 to 200 parts by weight of gypsum and 10 to 40 parts by weight of the setting modifier with respect to 100 parts by weight of calcium aluminate. The content of the Portland cement fine powder is preferably 50 to 400 parts by weight with respect to 100 parts by weight of the total amount of calcium aluminate powder, gypsum and setting modifier.
本発明の速硬性注入材は、上記速硬化材１００重量部に対して水を１００〜１０００重量部を混合してなる硬化促進スラリーと、高炉スラグ微粉末を主体とするセメントミルクを混合してなるものである。この高炉スラグ微粉末は、ブレーン比表面積１００００cm2/ｇ以上であって最大粒径１０μmのものが好ましい。 The quick-hardening injecting material of the present invention comprises a hardening accelerating slurry obtained by mixing 100 to 1000 parts by weight of water with 100 parts by weight of the fast-curing material and cement milk mainly composed of blast furnace slag fine powder. It will be. The blast furnace slag fine powder preferably has a Blaine specific surface area of 10000 cm 2 / g or more and a maximum particle size of 10 μm.
セメントミルクには高炉スラグ微粉末と共にアルカリ刺激剤、分散剤、水が含まれる。アルカリ刺激剤としては硫酸ナトリウムを用いることができる。分散剤は一般に使用されるナフタレンスルフォン酸塩、リグニンスルフォン酸、メラミンスルフォン酸などが用いることができる。
Cement milk contains an alkali stimulant, a dispersant, and water together with blast furnace slag fine powder. Sodium sulfate can be used as the alkali stimulant. As the dispersant, generally used naphthalene sulfonate, lignin sulfonic acid, melamine sulfonic acid and the like can be used.
セメントミルクにおいて、各成分の含有量は、高炉スラグ微粉末１００重量部に対して、アルカリ刺激剤は１〜１０重量部、分散剤は０.１〜１０重量部が好ましい。 In the cement milk, the content of each component is preferably 1 to 10 parts by weight for the alkali stimulant and 0.1 to 10 parts by weight for the dispersant with respect to 100 parts by weight of the blast furnace slag fine powder.
また、セメントミルクは、高炉スラグ微粉末、アルカリ刺激剤、分散剤と共に、上記速硬化材の主成分であるポルトランドセメント微粉末（Ｃ3Ａ含有量９重量％以上、ブレーン比表面積１００００cm2/ｇ以上、最大粒径１２μm）を少量含むことができる。このポルトランドセメント微粉末の含有量は、高炉スラグ微粉末１００重量部に対して１０重量部以下が好ましい。セメントミルク中のポルトランドセメント微粉末含有量が多過ぎると速硬性注入材の注入深さが伸びない傾向がある。 Cement milk is made of Portland cement fine powder, which is the main component of the fast-curing material, together with fine powder of blast furnace slag, alkali stimulant, and dispersant (C 3 A content of 9% by weight or more, Blaine specific surface area of 10,000 cm 2 / g. As described above, a small amount of the maximum particle size of 12 μm) can be contained. The content of the Portland cement fine powder is preferably 10 parts by weight or less with respect to 100 parts by weight of the blast furnace slag fine powder. When the Portland cement fine powder content in the cement milk is too large, the injection depth of the quick-hardening injecting material tends not to increase.
セメントミルクは、所要の浸透性および強度を考慮して，高炉スラグ微粉末やポルトランドセメント微粉末などの粉体合計量１００重量部に対して水１００〜１０００重量部を混合して調製するとよい。 The cement milk may be prepared by mixing 100 to 1000 parts by weight of water with 100 parts by weight of the total amount of powder such as blast furnace slag fine powder and Portland cement fine powder in consideration of required permeability and strength.
以下、本発明の実施例を比較例と共に示す。使用材料を以下に示す。
（Ａ）高炉スラグ微粉末（住金鹿島鉱化製品、ブレーン比表面積１１５００cm2/ｇ、最大粒径１０μｍ）
（Ｂ）早強ポルトランドセメント微粉末（三菱マテリアル製品）、以下のＣ3Ａ含有量、ブレーン比表面積、最大粒径のものを用いた。
(B-ａ) Ｃ3Ａ＝１１.５％、ブレーン比表面積１０５００cm2/ｇ、最大粒径１２μｍ
(B-ｂ) Ｃ3Ａ＝１０.６％、ブレーン比表面積１０５００cm2/ｇ、最大粒径１２μｍ
(B-ｃ) Ｃ3Ａ＝９.２％、ブレーン比表面積１０５００cm2/ｇ、最大粒径１２μｍ
(B-ｄ) Ｃ3Ａ＝８.５％、ブレーン比表面積１０５００cm2/ｇ、最大粒径１２μｍ
（Ｃ）超微粉炭カル（菱光石灰工業製品、ブレーン比表面積１２１００cm2/ｇ。最大粒径１０μｍ）
（Ｄ）アルカリ刺激剤：硫酸ナトリウム（フジボウ製品、無水中性芒硝）
（Ｅ）分散剤（花王社製品、マイティ１５０Ｒ，ナフタレンスルフォン酸塩）
（Ｆ）水（水道水）
（Ｇ）Ｃ12Ａ7粉砕品（三菱マテリアル製品、ブレーン比表面積４８５０cm2/ｇ、最大粒径２５μｍ）
（Ｈ）無水石膏粉砕品（三菱マテリアル製品、ブレーン比表面積１０８００cm2/ｇ、最大粒径１１μｍ）
（Ｉ）凝結調整剤（炭酸ナトリウム：酒石酸＝１：１）
Examples of the present invention are shown below together with comparative examples. The materials used are shown below.
(A) Blast furnace slag fine powder (Sumikin Kashima mineralized product, Blaine specific surface area 11500cm 2 / g, maximum particle size 10μm)
(B) Early strong Portland cement fine powder (Mitsubishi Materials Corporation), the following C 3 A content, Blaine specific surface area and maximum particle size were used.
(B-a) C 3 A = 11.5%, Blaine specific surface area 10500 cm 2 / g, maximum particle size 12 μm
(B-b) C 3 A = 10.6%, Blaine specific surface area 10500 cm 2 / g, maximum particle size 12 μm
(B-c) C 3 A = 9.2%, Blaine specific surface area 10500 cm 2 / g, maximum particle size 12 μm
(Bd) C 3 A = 8.5%, Blaine specific surface area 10500 cm 2 / g, maximum particle size 12 μm
(C) Ultra fine coal cal (Ryoko Lime Industrial Product, Blaine specific surface area 12100 cm 2 / g, maximum particle size 10 μm)
(D) Alkali stimulant: Sodium sulfate (Fujibo product, anhydrous neutral sodium sulfate)
(E) Dispersant (Kao Corporation product, Mighty 150R, naphthalene sulfonate)
(F) Water (tap water)
(G) C 12 A 7 ground product (Mitsubishi Materials product, Blaine specific surface area 4850 cm 2 / g, maximum particle size 25 μm)
(H) Anhydrous gypsum pulverized product (Mitsubishi Materials product, Blaine specific surface area 10800 cm 2 / g, maximum particle size 11 μm)
(I) Setting controller (sodium carbonate: tartaric acid = 1: 1)
表１に示す重量比に従って主材のセメントミルク(Ａ−１)〜(Ａ−３)を調製した。表２に示す重量比に従って硬化促進スラリー(Ｂ−１)〜(Ｂ−８)を調製した。なお、セメントミルク(Ａ−３)、硬化促進スラリー(Ｂ−８)〜(Ｂ−１１)は比較品である。 Cement milk (A-1) to (A-3) as main materials were prepared according to the weight ratio shown in Table 1. Curing acceleration slurries (B-1) to (B-8) were prepared according to the weight ratio shown in Table 2. Cement milk (A-3) and curing accelerating slurries (B-8) to (B-11) are comparative products.
主材のセメントミルク(Ａ−１)〜(Ａ−３)に対して、硬化促進スラリー(Ｂ−１)〜(Ｂ−１１)を３：１の割合で混合して速硬性注入材を調製した。混合したセメントミルクの種類と硬化促進スラリーの種類を表３に示し、その可使時間、ゲルタイム、注入性を表３に示した。なお、実施例において、セメントミルクおよび硬化促進スラリーの水／結合材比は４００％を中心に記載したが、何れの水／結合材比とも、浸透性や強度性状に合せて、１００〜１０００％の範囲で調整することができる。 A fast-curing injection material is prepared by mixing the hardening milk slurries (B-1) to (B-11) at a ratio of 3: 1 to the main material cement milk (A-1) to (A-3). did. Table 3 shows the type of cement milk mixed and the type of hardening accelerating slurry, and Table 3 shows the pot life, gel time, and injectability. In the examples, the water / binder ratio of the cement milk and the hardening accelerating slurry is described mainly at 400%, but any water / binder ratio is 100 to 1000% in accordance with the permeability and strength properties. It can be adjusted within the range.
表３に示す速硬性注入材を、透水係数１０×１０-3cm/秒に調整した砂充填層に０.１MPaの圧力で注入し、その注入深さを測定した。試験装置の概要を図に示す。また速硬性注入材のホモゲル強度およびサンドゲル強度（注入硬化部分の強度に対応）を表３に示した。 The quick-hardening injection material shown in Table 3 was injected at a pressure of 0.1 MPa into a sand-filled layer adjusted to a water permeability of 10 × 10 −3 cm / sec, and the injection depth was measured. The outline of the test equipment is shown in the figure. Table 3 shows the homogel strength and sand gel strength (corresponding to the strength of the injection-cured portion) of the fast-curing injection material.
可使時間、ゲルタイム、注入性、ホモゲル強度およびサンドゲル強度の測定方法を以下に示す。
〔可使時間〕セメントミルクの粘度をＢ型粘度計により測定し，粘度が１０mPa・ｓに達する時間を可使時間とした。
〔ゲルタイム〕セメントミルクの粘度をＢ型粘度計により測定し，粘度が６０mPa・ｓに達する時間を可使時間とした。
〔注入性〕懸濁液型薬液の浸透距離測定による浸透性の判定方法例（社団法人日本薬液注入協会）に準拠して、速硬性注入材の注入深さを測定した。試験は、図１に示すように、透水係数を１０×１０-3cm/秒に調整した砂充填層の下部から速硬性注入材を注入して注入深さを測定した。
〔ホモゲル強度〕直径５cmおよび長さ１００cmの下端を塞いだポリエチレン袋に速硬性注入材を投入し、材齢７日および材齢２８日で取り出し、硬化物を長さ１０cmに切断した後に、規格（JIS A 1216「土の一軸圧縮試験方法」）に準拠して圧縮強度を測定し、この測定値をホモゲル強度とした。
〔サンドゲル強度〕注入性試験に用いた砂充填層より、材齢７日で注入材が浸透した部分を取り出し、規格（JIS A 1216「土の一軸圧縮試験方法」）に準拠して圧縮強度を測定し、この測定値をサンドゲル強度とした。
The measuring method of pot life, gel time, injectability, homogel strength and sand gel strength is shown below.
[Usable time] The viscosity of cement milk was measured with a B-type viscometer, and the time until the viscosity reached 10 mPa · s was defined as the usable time.
[Gel time] The viscosity of cement milk was measured with a B-type viscometer, and the time for the viscosity to reach 60 mPa · s was defined as the pot life.
[Injectability] The injection depth of the fast-curing injection material was measured according to an example of a method for determining permeability by measuring the penetration distance of a suspension type chemical solution (Japan Chemical Injection Association). In the test, as shown in FIG. 1, a fast-hardening injecting material was injected from the lower part of the sand-filled layer whose water permeability was adjusted to 10 × 10 −3 cm / sec, and the injection depth was measured.
[Homogel strength] A fast-curing injection material is put into a polyethylene bag with the lower end of a diameter of 5 cm and a length of 100 cm, taken out at a material age of 7 days and a material age of 28 days, and the cured product is cut into a length of 10 cm. Compressive strength was measured in accordance with (JIS A 1216 “Soil uniaxial compression test method”), and this measured value was defined as homogel strength.
[Sand gel strength] From the sand-filled layer used for the injectability test, the portion where the injected material penetrated at the age of 7 days is taken out, and the compressive strength is measured in accordance with the standard (JIS A 1216 "Soil uniaxial compression test method"). The measured value was taken as the sand gel strength.
表３に示すように、本発明の実施例１〜実施例８は、十分な可使時間とゲルタイムを有しており、しかも透水係数の小さい地盤に対して何れも４５cm以上の注入深さを達成している。一方、比較例１〜５の可使時間とゲルタイムは実施例１〜８と同程度であるが、注入深さは何れも２８cm以下であり、透水係数の小さい地盤に対する注入性が格段に小さい。なお、比較例５はセメントミルクに含まれるセメント量が多すぎるので、本発明の速硬化材と組み合わせても、注入深さが２８cmに止まる。 As shown in Table 3, Examples 1 to 8 of the present invention have sufficient pot life and gel time, and each has an injection depth of 45 cm or more with respect to the ground having a small hydraulic conductivity. Have achieved. On the other hand, the pot life and gel time of Comparative Examples 1 to 5 are about the same as those of Examples 1 to 8, but the injection depth is 28 cm or less, and the injectability to the ground having a small water permeability coefficient is remarkably small. In Comparative Example 5, since the amount of cement contained in the cement milk is too large, the injection depth is only 28 cm even when combined with the fast-curing material of the present invention.
また、サンドゲルの強度は、実施例１〜８は何れも材齢７日における一軸圧縮強度が１N/mm2以上であって、実施例７〜８は２N/mm2前後であり、大きな圧縮強度を有している。一方、比較例１〜６は何れも１N/mm2以下であり、比較例２〜４は０.６N/mm2以下であって、圧縮強度が格段に小さい。 Moreover, as for the intensity | strength of a sand gel, all of Examples 1-8 are 1 N / mm < 2 > or more in uniaxial compressive strength in age 7 days, and Examples 7-8 are around 2 N / mm <2>, and big compressive strength have. On the other hand, Comparative Examples 1 to 6 are all 1 N / mm 2 or less, Comparative Examples 2 to 4 are 0.6 N / mm 2 or less, and the compressive strength is remarkably small.
表４に、セメントミルクおよび硬化促進スラリーの水／結合材比を変化させた場合の浸透性とサンドゲルの強度性状を示す。セメントミルクは、表１の配合(Ａ−２)を基準に水／結合材比が１００％と１０００％のものを用いた。硬化促進成分ミルクは，表２の(配合Ｂ−１)を基準に水／結合材比が１００％と１０００％のものを用いた。水／結合材比が１００％ではサンドゲル強度が高くなり、一方、水／結合材比が１０００％では注入深さが長くなった。 Table 4 shows the penetrability and the strength properties of the sand gel when the water / binder ratio of the cement milk and the hardening accelerating slurry is changed. Cement milk having a water / binder ratio of 100% and 1000% based on the formulation (A-2) in Table 1 was used. As the hardening accelerating component milk, those having a water / binder ratio of 100% and 1000% based on (Formulation B-1) in Table 2 were used. When the water / binder ratio was 100%, the sand gel strength was high, while when the water / binder ratio was 1000%, the injection depth was long.
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| JP2001234167A (en) * | 2000-02-21 | 2001-08-28 | Mitsubishi Materials Corp | Ultra fast-curing injection material and injection process using the same |
| JP4818503B2 (en) * | 2000-09-20 | 2011-11-16 | 電気化学工業株式会社 | Low hexavalent chromium injection material |
| JP4535793B2 (en) * | 2004-07-02 | 2010-09-01 | 太平洋マテリアル株式会社 | Ground injection material |
| JP2007137745A (en) * | 2005-11-22 | 2007-06-07 | Taiheiyo Material Kk | Quick hardening material and high-penetrating grout |
| JP2009132808A (en) * | 2007-11-30 | 2009-06-18 | Nittetsu Cement Co Ltd | Grouting material and regulation method of curing time |
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2009
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