CN103880372A - Cement-based grouting material used for strengthening repairing as well as preparation method and application thereof - Google Patents

Cement-based grouting material used for strengthening repairing as well as preparation method and application thereof Download PDF

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Publication number
CN103880372A
CN103880372A CN201410076647.2A CN201410076647A CN103880372A CN 103880372 A CN103880372 A CN 103880372A CN 201410076647 A CN201410076647 A CN 201410076647A CN 103880372 A CN103880372 A CN 103880372A
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cement
grouting
repairing
component
reinforcing
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CN103880372B (en
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任恩平
宋涛文
于大第
陈夙
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Beijing New Vision Building Construction Technology Co Ltd
Central Research Institute of Building and Construction Co Ltd MCC Group
China Jingye Engineering Corp Ltd
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Beijing New Vision Building Construction Technology Co Ltd
Central Research Institute of Building and Construction Co Ltd MCC Group
China Jingye Engineering Corp Ltd
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Abstract

The invention relates to a cement-based grouting material used for strengthening repairing as well as a preparation method and application thereof. The cement-based grouting material comprises the following components in parts by weight: 300-500 parts of cement, 200-300 parts of admixtures, 300-400 parts of fillers, 3-6 parts of water-reducing components, 0.1-1 part of plastic swelling component, 10-20 parts of hardened swelling components, 0.01-0.2 part of stable component, 1-4 parts of early strength components, 0.2-2 parts of defoaming components and 0.01-0.2 parts of emulsifying component. The cement-based grouting material disclosed by the invention has performance advantages such as higher injection-molding performance, initial fluidity not greater than 17s, impermeability not exceeding 1mm, wear resistance not exceeding 10cm<3>/cm<2>, compressive strength within 2 hours not lower than 5MPa, compressive strength within 1 day not lower than 30 MPa, and the like. The cement-based grouting material has composite swelling, the free swelling ratio within 3 hours is 0.02%-2% and grouting is full and dense; the viscosity is low, the volume stability is good and durability is good; the cement-based grouting material does not contain VOC (volatile organic compounds), and is environment-friendly.

Description

For cement based grouting material, its preparation method and the application thereof of reinforcing and repairing
Technical field
The invention belongs to building material technology Application Areas, relate to a kind of cement based grouting material, its preparation method and application thereof that reinforcing and repairing is used that be applicable to.This cement based grouting material is applicable to the pit shaft slip casting in the field such as mine and colliery, and this material also can be applicable to zone of weathering, rock stratum grouting and reinforcing and Concrete Engineering Cracks and repairs.
Background technology
The water damage in the field such as mine, colliery is one of major casualty of safety in production, the karst of bottom, northern China stratum limestone is grown, once be subject to mining influence, may there is serious mine water disaster problem, gushing water amount is per hour from hundreds of cube to tens thousand of cubes, very easily causes serious security incident.Under the hydrogeological conditions of deep crack rock in negative value, existing crack osmotic grouting material is difficult to meet the demands, can not guide field grouting process.
Therefore, national correlation department is relatively paid attention to this field, has has also researched and developed similar injecting paste material.One class is chemical grout, there is good stability, the property noted is strong, viscosity is low, gel time is easily controlled and can pours into the advantages such as narrow and small crack, common chemical grout has acrylic amide, urea-formaldehyde resin class, polyurethanes and epoxy resin etc., but its shortcoming is not environmental protection, and cost is high.Another kind of is cement plasmoid humor, and at present the many of use is cement list liquid, cement-silicate biliquid etc.
Chinese patent literature 200910091507.1 discloses a kind of pre-grouting from the surface reinforcing and has used quick-setting early strength cement slurries, and initial viscosity is low, good fluidity, but slurry viscosity growth is fast, and water resistant dilution capacity is strong, and time of coagulation is short, and early stage consolidating strength is high.
Chinese patent literature 201010599615.2 disclose a kind of single component hydrophilic polyurethane grouting material with and raw material and preparation method, have and do not use volatile organic solvent, and there is single fluid grouting, meet the features such as water rapid reaction sealing.
Chinese patent literature 201110029290.9 discloses a kind of cement-based grouting material for ground source heat pump, has excellent flowing property, the retention that flows and closely knit performance, is convenient to filling grouting compacting.
Chinese patent literature 201110243559.3 discloses a kind of fast hard self-compacting anti-cracking high-performance grouting material that can be used for the salvaging of urban road inspection chamber, stirring adds water, water and injection material dry blend weight ratio are 0.14~0.18, have cracking resistance, self-compacting, fast hard, weather resistance, adhesive property and the volume stability good with interface.
Chinese patent literature 201210002291.9 discloses a kind of urethane grouting for water-blocking-reinforcement material and preparation method and using method, comprise two kinds of components, A component is polyether glycol and auxiliary material, B component is isocyanic ester or its pre-composition, for slip casting-water reinforcement, speed of response is very fast, and 20s starts reaction, 90s finishes substantially, and the reaction times is adjustable according to project situation.
The at present domestic unified standard standard of formulating about grouting and reinforcing of not putting into effect, all carries out according to company standard or local regulation, and performance index are uneven.Be mainly manifested in: (1) poor fluidity, early strength is low; (2) only have late expansion, the full property of slip casting is poor; (3) shrink high, the volume stability in later stage and poor durability; (4) viscosity is high, is difficult for disperseing; (5) not environmental protection of organic injecting paste material.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of cement based grouting material for reinforcing and repairing.By various components, through premixs, after mixing, under 0.26~0.28 ratio of water to material condition, formulated cement based slurry can reach initial flow degree and is less than 17s, and half an hour, degree of mobilization was less than 20s, and barrier properties is no more than 1mm, and fastness to rubbing is no more than 10cm 3/ cm 2, 2h ultimate compression strength is not less than 5MPa, and 1d ultimate compression strength is not less than the performance requriementss such as 30MPa.When construction application, injecting paste material can be squeezed into crack by grouting pump at the pressure that is not less than 0.5MPa, realize and reinforce water blockoff, the object in mending concrete crack.
Another object of the present invention is to provide the preparation method of the above-mentioned cement based grouting material for reinforcing and repairing.
An also object of the present invention is to provide the application of the above-mentioned cement based grouting material for reinforcing and repairing.
To achieve these goals, the present invention adopts following technical scheme:
Cement based grouting material for reinforcing and repairing of the present invention, is characterized in that, by mass parts, described cement based grouting material comprises:
In the preferred embodiment of the invention, the cement based grouting material for reinforcing and repairing of the present invention, is characterized in that, by mass parts, described cement based grouting material comprises:
In the present invention, described cement is that intensity is not less than 42.5MPa, specific surface area is not less than 450cm 2one or more in ordinary Portland cement, silicate cement and the aluminosulfate cement of/g;
Described adulterant is to be not less than one or both in 1250 object superfined flyashs and ultra-fine wollastonite powder;
Described filler is one or more in talcum powder, steel-making slag powder, kaolin and coarse whiting;
Described diminishing component is one or both in polycarboxylate water-reducer and melamine water reducing agent;
Described plastic expansion component is one or more in sodium bentonite, alum, gac and aluminium powder;
After described sclerosis, expansion component is one or more in ettringite class swelling agent, calcium oxide expansion agents, magnesium oxide class swelling agent and porous zeolite class swelling agent;
Described stable component is that 20 DEG C of viscosity are no more than one or more in ether of cellulose, starch ethers and the xanthan gum of 1000cps;
Described accelerating component is one or more in inorganic silicate hardening accelerator, inorganic carbonate hardening accelerator and formate hardening accelerator;
Described froth breaking component is one or more in organo-siloxane defoamer, polyethers defoamer and amides defoamer;
Described emulgate ingredient is one or more of alkylphenol polyoxyethylene class tensio-active agent, Ben-zylphenol Polyoxyethyl Ether class surface dispersant and alkylsulfonate.
According to a further aspect in the invention, the preparation method of the above-mentioned cement based grouting material for reinforcing and repairing is provided, described method comprises: by expansion component after cement, adulterant, filler, diminishing component, plastic expansion component, sclerosis, stablize component, accelerating component, froth breaking component and emulgate ingredient by mass parts input stirrer separately, mix and blend 5~10 minutes, obtains the cement based grouting material for reinforcing and repairing of the present invention continuously.
According to another aspect of the invention, the application of the above-mentioned cement based grouting material for reinforcing and repairing is provided, comprise: described cement based grouting material is according to ratio of water to material 0.26~0.28, in stirrer, by even described cement based grouting material blunge, uniform mix slurry is pressed into crack or crack by the grouting pump that adopts pump pressure to be not less than 0.5MPa.
In above-mentioned preparation method and application, preferably, the linear velocity of stirrer is not less than 2.5m/s, can obtain finely dispersed injecting paste material.
The invention has the beneficial effects as follows:
(1) the present invention adopts multiple composition of concrete admixture technology, and the injecting paste material that makes to be mixed with has higher pressure injection (initial flow degree≤17s), barrier properties is no more than 1mm, and fastness to rubbing is no more than 10cm 3/ cm 2, 2h ultimate compression strength is not less than 5MPa, and 1d ultimate compression strength is not less than the feature performance benefits such as 30MPa.
(2) the present invention adopts plastic expansion component and the rear expansion component compounding technology of sclerosis, make the cement slurry being mixed with there is excellent early expansion performance (3h degree of free swelling is 0.02~2%), also there is microdilatancy to a certain degree in later stage, has ensured the full property of slip casting.
(3) superfine powder that the present invention adopts, that had both improved slurry can application property, has reduced again contraction, has increased and basic cohesive strength, has ensured volume stability and the weather resistance of injecting cement paste.
(4) viscosity of injecting paste material of the present invention is lower, and the stirrer that adopts linear velocity to be not less than 2.5m/s can obtain good dispersion effect.
(5) injecting paste material of the present invention, not containing VOC, belongs to environmental friendliness shaped material; And good with base concrete adaptability.Cement based slurry of the present invention is applicable to the pit shaft slip casting in the field such as mine and colliery, also can be applicable to zone of weathering, rock stratum grouting and reinforcing and Concrete Engineering Cracks and repairs.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment, below each embodiment only for the present invention is described, protection scope of the present invention is not subject to the restriction of these embodiment.Wherein, performance test methods is carried out by existing national standard " cement-based grouting material utilisation technology specification " GB/T50448-2008 and " inorganic earth material wear resistance test method " GB/T12988-2009.
Embodiment 1
Each component proportion is as follows:
Silicate cement (Qian Ye cement mill, Qinhuangdao P I, intensity 42.5MPa, specific surface area 450cm 2/ g)
300 parts,
Fineness is 200 parts of 1250 object superfined flyashs,
400 parts of coarse whitings,
5 parts of polycarboxylate water-reducers,
0.1 part of gac,
15 parts of calcium oxide swelling agents (the model ZS of Zhengzhou Zheng Sen type material company),
0.1 part of ether of cellulose (DOW Chemical MKW4000PF, 20 DEG C of viscosity 400cps),
2 parts of calcium formiates (the strange chemical industry in Shanghai),
1 part of organo-siloxane defoamer (the German munzing-chemie P803 of company),
0.02 part of dodecyl phenol polyethenoxy ether (Hai'an, Jiangsu chemical industry OP-15),
Above-mentioned each component is dropped into by its mass parts in the stirrer of model JS-500, and continuously stirring is mixed 5~10 minutes, makes the cement based grouting material 1 for reinforcing and repairing uniformly.
Be 0.28 by the injecting paste material making 1 according to ratio of water to material, adopt planetary cement mortar mixer by even cement based grouting material 1 blunge, stir normal curing.
Injecting paste material 1 the performance test results is as follows: initial flow degree 16s, barrier properties 0.5mm, fastness to rubbing 8cm 3/ cm 2, 2h ultimate compression strength 7.5MPa, 1d ultimate compression strength 35.0MPa, 28d ultimate compression strength 78.4MPa.
In the time using injecting paste material 1 construction application, injecting paste material 1 stirs with the stirrer of linear velocity 2.5m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.5MPa, realizes shutoff.
Embodiment 2
Each component proportion is as follows:
200 parts of ordinary Portland cements (cement mill, Handan Taihang board PO42.5R),
300 parts of aluminosulfate cements (42.5 grades, polar bear cement mill, Tangshan polar bear board)
200 parts of fineness 1500 object superfined flyashs,
300 parts of steel-making slag powder
6 parts of polycarboxylate water-reducers,
0.2 part of gac,
20 parts of MgO expansion agents (Tianjin Bao Ming limited-liability company),
0.2 part of starch ethers (German munzing-chemie company 235),
1 part of water glass (sharp chemical industry is gathered in Yongqing),
0.8 part of organo-siloxane defoamer (the German munzing-chemie P801 of company),
0.03 part of polyoxyethylene nonylphenol ether (Hai'an, Jiangsu chemical industry SOP-20),
Above-mentioned each component is dropped into by its mass parts in the stirrer of model JS-500, and continuously stirring is mixed 5~10 minutes, makes the cement based grouting material 2 for reinforcing and repairing uniformly.
Be 0.26 by the injecting paste material making 2 according to ratio of water to material, adopt planetary cement mortar mixer by even cement based grouting material 2 blunges, stir normal curing.
Injecting paste material 2 the performance test results are as follows: initial flow degree 15s, 3h degree of free swelling is 0.1%, barrier properties 0.3mm, fastness to rubbing 6cm 3/ cm 2, 2h ultimate compression strength 9.0MPa, 1d ultimate compression strength 40.2MPa, 28d ultimate compression strength 85.7MPa.
In the time using injecting paste material 2 construction application, injecting paste material 2 stirs with the stirrer of linear velocity 2.8m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.7MPa, realizes shutoff.
Embodiment 3
Each component proportion is as follows:
300 parts of aluminosulfate cements (42.5 grades, polar bear cement mill, Tangshan polar bear board),
Fineness is 100 parts of 1500 object superfined flyashs,
Fineness is 150 parts of the ultra-fine wollastonite powder of 1500 object,
400 parts of kaolin,
4 parts of melamine water reducing agents,
0.5 part of aluminium powder,
7 parts of ettringite swelling agents (UEA of Tianjin Bao Ming limited-liability company),
8 parts, zeolite (Jiade, Qingdao filtrate company limited)
0.1 part of xanthan gum (20 DEG C of viscosity 800cps),
2 parts of Quilonum Retards,
1.2 parts of organo-siloxane defoamers (the German munzing-chemie P801 of company),
0.05 part of polyoxyethylene nonylphenol ether (Hai'an, Jiangsu chemical industry SOP-20),
Above-mentioned each component is dropped into by its mass parts in the stirrer of JS-500 model, and continuously stirring is mixed 5~10 minutes, makes the cement based grouting material 3 for reinforcing and repairing uniformly
Be 0.27 by the injecting paste material making 3 according to ratio of water to material, adopt planetary cement mortar mixer by even cement based grouting material 3 blunges, stir normal curing.
Injecting paste material 3 the performance test results are as follows: initial flow 16s, 3h degree of free swelling is 0.15%, barrier properties 0.4mm, fastness to rubbing 7cm 3/ cm 2, 2h ultimate compression strength 8.5MPa, 1d ultimate compression strength 39.2MPa, 28d ultimate compression strength 81.6MPa.
In the time using injecting paste material 3 construction application, injecting paste material 3 stirs with the stirrer of linear velocity 2.6m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.6MPa, realizes shutoff.
Embodiment 4
In the cement based grouting material 4 for the preparation of reinforcing and repairing, except adopted silicate cement is intensity 42.5MPa, specific surface area 500cm 2outside the silicate cement of/g, other component, consumption are identical with embodiment 1, and make injecting paste material 4 with identical method.
Be 0.28 with water according to ratio of water to material by the injecting paste material making 4, adopt planetary cement mortar mixer by even cement based grouting material 4 blunges, stir normal curing.
Injecting paste material 4 the performance test results are as follows: initial flow degree 16s, barrier properties 0.4mm, fastness to rubbing 7cm 3/ cm 2, 2h ultimate compression strength 7.8MPa, 1d ultimate compression strength 36.4MPa, 28d ultimate compression strength 80.1MPa.
In the time using injecting paste material 4 construction application, injecting paste material 4 stirs with the stirrer of linear velocity 2.5m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.5MPa, realizes shutoff.
Embodiment 5
In the cement based grouting material 5 for the preparation of reinforcing and repairing, except adopted superfined flyash is that fineness is 1500 object superfined flyashs, other component, consumption are identical with embodiment 1, and make injecting paste material 5 with identical method.
Be 0.27 by the injecting paste material making 5 according to ratio of water to material, adopt planetary cement mortar mixer by even cement based grouting material 5 blunges, stir normal curing.
Injecting paste material 5 the performance test results are as follows: initial flow degree 16.5s, barrier properties 0.5mm, fastness to rubbing 7.5cm 3/ cm 2, 2h ultimate compression strength 7.0MPa, 1d ultimate compression strength 34.9MPa, 28d ultimate compression strength 76.8MPa.
In the time using injecting paste material 5 construction application, injecting paste material 5 stirs with the stirrer of linear velocity 2.6m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.75MPa, realizes shutoff.
Embodiment 6
In the cement based grouting material 6 for the preparation of reinforcing and repairing, except adopted ether of cellulose is 20 DEG C of viscosity ether of cellulose that is 850cps, other component, consumption are identical with embodiment 1, and make injecting paste material 6 with identical method.
Be 0.26 by the injecting paste material making 6 according to ratio of water to material, adopt planetary cement mortar mixer by even cement based grouting material 6 blunges, stir normal curing.
Injecting paste material 6 the performance test results are as follows: initial flow degree 16s, barrier properties 0.3mm, fastness to rubbing 6cm 3/ cm 2, 2h ultimate compression strength 8.2MPa, 1d ultimate compression strength 37.5MPa, 28d ultimate compression strength 81.2MPa.
In the time using injecting paste material 6 construction application, injecting paste material 6 stirs with the stirrer of linear velocity 2.7m/s with hydromining, is pressed in the crack or crack of carrying out sealing measure immediately with the grouting pump of pump pressure 0.75MPa, realizes shutoff.
As mentioned above, embodiments of the invention are had been described in detail, but as long as not departing from fact inventive point of the present invention and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation is also contained in protection scope of the present invention.

Claims (10)

1. for a cement based grouting material for reinforcing and repairing, it is characterized in that, by mass parts, described cement based grouting material comprises:
2. the cement based grouting material for reinforcing and repairing according to claim 1, is characterized in that, by mass parts, described cement based grouting material comprises:
3. the cement based grouting material for reinforcing and repairing according to claim 1 and 2, is characterized in that, described cement is that intensity is not less than 42.5MPa, specific surface area is not less than 450cm 2one or more in ordinary Portland cement, silicate cement and the aluminosulfate cement of/g; Described adulterant is to be not less than one or both in 1250 object superfined flyashs and ultra-fine wollastonite powder; Described filler is one or more in talcum powder, steel-making slag powder, kaolin and coarse whiting.
4. according to the cement based grouting material for reinforcing and repairing described in any one in claims 1 to 3, it is characterized in that, described diminishing component is one or both in polycarboxylate water-reducer and melamine water reducing agent; Described accelerating component is one or more in inorganic silicate hardening accelerator, inorganic carbonate hardening accelerator and formate hardening accelerator.
5. according to the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 4, it is characterized in that, described plastic expansion component is one or more in sodium bentonite, alum, gac and aluminium powder; After described sclerosis, expansion component is one or more in ettringite class swelling agent, calcium oxide expansion agents, magnesium oxide class swelling agent and porous zeolite class swelling agent.
6. according to the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 5, it is characterized in that, described stable component is that 20 DEG C of viscosity are no more than one or more in ether of cellulose, starch ethers and the xanthan gum of 1000cps.
7. according to the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 6, it is characterized in that, described froth breaking component is one or more in organo-siloxane defoamer, polyethers defoamer and amides defoamer.
8. according to the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 7, it is characterized in that, described emulgate ingredient is one or more of alkylphenol polyoxyethylene class tensio-active agent, Ben-zylphenol Polyoxyethyl Ether class surface dispersant and alkylsulfonate.
9. one kind according to the preparation method of the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 8, described method comprises: by expansion component after cement, adulterant, filler, diminishing component, plastic expansion component, sclerosis, stablize component, accelerating component, froth breaking component and emulgate ingredient by mass parts input stirrer separately, mix and blend 5~10 minutes, obtains the cement based grouting material for reinforcing and repairing continuously.
10. according to the application of the cement based grouting material for reinforcing and repairing described in any one in claim 1 to 8, comprise: described cement based grouting material is according to ratio of water to material 0.26~0.28, in stirrer, by even described cement based grouting material blunge, uniform mix slurry is pressed into crack or crack by the grouting pump that adopts pump pressure to be not less than 0.5MPa.
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