CN102491669B - Special plastic expansion agent for cement-based grouting material and preparation method of same - Google Patents
Special plastic expansion agent for cement-based grouting material and preparation method of same Download PDFInfo
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- CN102491669B CN102491669B CN 201110359467 CN201110359467A CN102491669B CN 102491669 B CN102491669 B CN 102491669B CN 201110359467 CN201110359467 CN 201110359467 CN 201110359467 A CN201110359467 A CN 201110359467A CN 102491669 B CN102491669 B CN 102491669B
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Abstract
The invention discloses a special plastic expansion agent for cement-based grouting material. The special plastic expansion agent comprises the components by weight percent: 3.0% to 5.0% of plastic expansion source, 0.05% to 0.15% of stearate, 5.0% to 10.0% of catalyst, 25.0% to 50.0% of quick lime and 35.0% to 60.0% of water retaining admixture. The special plastic expansion agent can hydrolyze and give off gas during the initial stage of cement hydration, and the gas which is given off uniformly enables cement slurry to expand slightly in volume, so that settling and cracking of grouting material can be avoided, and the slurry is ensured denseness and fullness. When the special plastic expansion agent is used with efficient water reducer or other admixtures, the purpose of efficiently ensuring that the plastic expansion of cement-based grouting material is greater than 0.1% in 3h under the condition of realizing the fluidness, the strength and the durability of the cement-based grouting material can be achieved, and expansibility that the expansion difference between 3h and 24h is greater than two ten thousandth and smaller than five thousandths can be achieved, so that plastic expansion of the cement-based grouting material can be realized.
Description
Technical field
The invention belongs to building material technical field, relate to a kind of cement modifier of common process preparation, the special-purpose plastic expansion agent of a kind of specifically cement-based grout material.
Background technology
Cement-based grouting material originates from the U.S., so far the history in existing more than 40 year.Because this material has good fluidity, does not have advantages such as contraction, early strengthening and high strengthening; In the equipment installation process, can pour into smoothly in the narrow gap under the equipment bay, the grout blanket density is good; Effectively loading end is high; Load Transfer is even, when shortening the equipment installation period, can prolong the work-ing life of equipment, and its range of application has also progressively expanded aspects such as bolt anchoring, structural strengthening, pavement patching to.Cement-based grouting material research of China and application be existing nearly 20 years so far.Along with the continuous development of Chinese national economy, the application of cement-based grouting material also more and more widely in the industries such as metallurgy, electric power, chemical industry, building materials, coal.
The overall development level of cement in China base grouting material also has a certain distance with external, does not have particularly that early-age plastic expands, problems such as shrinkage crack appear in the later stage.For guaranteeing the quality of cement-based grouting material, the Ministry of Construction clearly proposes cement-based grouting material in " the cement-based grouting material utilisation technology standard " GB/T50448-2008 that has issued must have 0.1 ~ 3.5% vertical rate of expansion in 1 ~ 3h.
In 1 ~ 3h; General grouting material all is in the plastic stage; Also there is not final set, therefore in cement expansive material commonly used, even adopt the excellent novel calcium aluminate-calcium sulphoaluminate-calcium oxide expansion agents of expansion character can not realize the microdilatancy of cement slurry plastic stage; Traditional metal powdery type swelling agent is because speed of response is fast; Gas forming amount is big, pore is big; It is inhomogeneous to get angry; Make the small crackle of its inner formation, be unfavorable for the development of concrete strength and weather resistance, be applied to injection material as the plastic stage expansion sources so traditional metal powdery type swelling agent has been under an embargo.The present invention work out a kind of novel expansion sources realize the plastic stage expansion and can effectively control it.
Summary of the invention
To the problem that exists in the prior art; The present invention provides the expansion sources product of a kind of plastic stage at hydrated cementitious initial stage; These article volume is low, gets angry evenly, and bubble is fine and smooth lasting; Can effectively guarantee cement-based grout material 3h plastic expansion greater than 0.1%, 3h and 24h differential expansion greater than 2/0,000 less than 5/,000 expansion character requirement.
Key problem in technology of the present invention is to find that several kinds of compound backs of material hydrolysis can take place and discharge gas in the hydrated cementitious initial stage; The gas that evenly discharges makes the microdilatancy of cement slurry generation volume; Through effective control gas forming amount slurry microdilatancy to required scope is stopped after slurry final set; Thereby avoid the sedimentation and the cracking of injection material, guarantee that slurry is closely knit, full.
Concrete technical scheme of the present invention is formed according to the weight percent of following material component and is mixed:
Plastic expansion source A 3.0%～5.0%
Hard ester acid esters B 0.05%～0.15%
Catalyzer C 5.0～10.0%
Unslaked lime D 25.0%～50.0%
Water-holding agent E 35.0%～60.0%.
The special-purpose plastic expansion agent of above-mentioned cement-based grout material; It is further characterized in that; Said A component plastic expansion source is the RM of getting angry of cement slurry plastic stage; Be mainly like p-nitrophenyl diazonium fluoride borate, NSC 263496, N the mixture of N-dicyclohexyl-2-[4-morpholinodithio sulphenamide.It can hydrolytic reactions emit gas under the effect of catalyzer.
The special-purpose plastic expansion agent of above-mentioned cement-based grout material, the hard ester acid esters of said B component, it is mainly in sorbitol anhydride Stearinsaeure, ten poly-glycerol, two hard ester acid esters, stearin, mono-glycerides, the 18 triglyceride one or more.When A component and B component are put into ball mill in proportion, A component surface can adhere to the stearic acid film of one deck uneven thickness in process of lapping, and the A component can not directly be contacted with water, catalyzer; Under the basic soln effect that in cement hydration process, forms; Adipose membrane saponification dissolving, the different dissolved speed of the thickness of adipose membrane are different, thereby controlled the slow stripping of A component effectively; Make hydrolysis reaction slowly continuous, the gas that is produced has guaranteed slurry expansible controllability and persistence.
The special-purpose plastic expansion agent of above-mentioned cement-based grout material, said C component catalyst, it mainly is Lithium Hydroxide MonoHydrate or Pottasium Hydroxide.Under the effect of catalyzer the A component could with water hydrolytic reactions at normal temperatures.
The special-purpose plastic expansion agent of above-mentioned cement-based grout material, said D component unslaked lime, the adding of unslaked lime can generate a certain amount of calcium hydroxide; Both can produce certain expansion; Replenish calcium hydroxide in the cement system again, improved the weak base state of system, helped the generation of ettringite.
The special-purpose plastic expansion agent of above-mentioned cement-based grout material, said E component water-holding agent, staple is one or more in wilkinite, zeyssatite, smectite, the zeolite powder.The adding of water-holding agent helps to prevent the sinking layering of injection material, keeps the homogeneity of slurry, helps the even diffusion of gas in slurry.
The invention also discloses the special-purpose plastic expansion agent of a kind of cement-based grout material preparation method; It is characterized in that: the above-mentioned A of difference weighing by weight percentage ~ E component; Earlier A, B component are dropped into ball mill; Fully grind the back and take out, together put into stirrer with the C component and stir, in whipping process, add D successively again, the E component stirs and gets final product.
The present invention has the following advantages: the present invention produces starting material and has characteristics such as nontoxic, no burn into is easy to get, and preparation technology is simple, environmentally safe.The special-purpose plastic expansion agent of this kind cement-based grout material volume is little, is merely 1% ~ 3% of cement consumption, gets angry evenly; Bubble is fine and smooth, and raising rate is slowly lasting, and is little to intensity effect after the hardening of cement; Realized that cement-based grout material 3h plastic expansion is greater than 0.1%; 3h and 24h differential expansion less than 5/,000 expansion character requirement, have guaranteed that the plastic expansion of cement-based grouting material is achieved greater than 2/0,000, shrinkage crack occurs effective guarantee is provided for preventing the later stage.
Embodiment
Further describe the present invention below in conjunction with specific embodiment.
Embodiment 1
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:3.0%; Stearate B:0.10%; Catalyzer C:6.0%; Unslaked lime D:35.0%; Water-holding agent E:55.9%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 2
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:4.0%; Stearate B:0.12%; Catalyzer C:7.0%; Unslaked lime D:46.0%; Water-holding agent E:42.88%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 3
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:5.0%; Hard ester acid esters B:0.15%; Catalyzer C:8.0%; Unslaked lime D:45.0%; Water-holding agent E:41.85%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 4
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:4.9%; 18 triglyceride B:0.1%; Potassium hydroxide catalyst C:5.0%; Unslaked lime D:30.0%; Zeolite powder water-holding agent E:60.0%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 5
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:5.0%; Sorbitol anhydride Stearinsaeure B:0.05%; Lithium Hydroxide MonoHydrate catalyzer C:5.0%; Unslaked lime D:45.0%; Zeyssatite water-holding agent E:44.95%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 6
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:5.0%; Ten poly-glycerol, two hard ester acid esters B:0.1%; Potassium hydroxide catalyst C:10.0%; Unslaked lime D:25.0%; Smectite water-holding agent E:59.9%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 7
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:4.9%; Stearin B:0.1%; Potassium hydroxide catalyst C:10.0%; Unslaked lime D:50.0%; Wilkinite water-holding agent E:35.0%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 8
The special-purpose plastic expansion agent of the cement-based grout material of present embodiment, components by weight percent is: plastic expansion source A:4.9%; Mono-glycerides B:0.1%; Potassium hydroxide catalyst C:5.0%; Unslaked lime D:30.0%; Zeolite powder water-holding agent E:60.0%; With the accurate weighing of above-mentioned each compositions in weight percentage, make the present invention by the said technology of embodiment 9.
Embodiment 9
The preparation method of the special-purpose plastic expansion agent of the cement-based grout material of present embodiment; The accurate weighing of each compositions in weight percentage with the foregoing description; Earlier A, B component are dropped into ball mill; Fully grind the back and take out, together put into stirrer with the C component and stir, in whipping process, add D successively again, the E component stirs and gets final product.
Wherein, Component plastic expansion source A is the RM of getting angry of cement slurry plastic stage; Be mainly like p-nitrophenyl diazonium fluoride borate, NSC 263496, N; The mixture of N-dicyclohexyl-2-[4-morpholinodithio sulphenamide, it can hydrolytic reactions emit gas under the effect of catalyzer.
When A component and B component are put into ball mill in proportion, A component surface can adhere to the stearic acid film of one deck uneven thickness in process of lapping, and the A component can not directly be contacted with water, catalyzer; Under the basic soln effect that in cement hydration process, forms; Adipose membrane saponification dissolving, the different dissolved speed of the thickness of adipose membrane are different, thereby controlled the slow stripping of A component effectively; Make hydrolysis reaction slowly continuous, the gas that is produced has guaranteed slurry expansible controllability and persistence.
Under the effect of catalyzer C the A component could with water hydrolytic reactions at normal temperatures.
The adding of unslaked lime D can generate a certain amount of calcium hydroxide, both can produce certain expansion, has replenished calcium hydroxide in the cement system again, has improved the weak base state of system, helps the generation of ettringite.
The adding of water-holding agent E helps to prevent the sinking layering of injection material, keeps the homogeneity of slurry, helps the even diffusion of gas in slurry.
The application implementation example
Below be performance situation of the present invention: little wild field P. II 52.5 cement that cement is produced for cement mill, the south of the River; The water-cement ratio of sand-cement slurry is 0.34; Cement mortar rate 1:1.4, water reducer volume are 0.75% of cement consumption, and the special-purpose plastic expansion agent of cement-based grout material volume is 1.5% of a cement consumption.TP: carry out with reference to GB/T50448-2008 " cement-based grouting material utilisation technology standard " relevant provision.
Table 1 correlated performance of the present invention
Though the present invention has enumerated part embodiment openly as above; But they are not to be used for limiting the present invention, anyly are familiar with this art, in spirit that does not break away from the present invention and scope; Can do various variations or retouching from working as; For example certain part of feed composition or process time are done to increase or reduce, but the effect of product maybe not can be produced substantial effect, so this change belongs within the scope that the application's claim protection domain defined equally.
Claims (4)
1. special-purpose plastic expansion agent of cement-based grout material is characterized in that the material of weight percent consists of:
Plastic expansion source (A) 3.0%～5.0%
Hard ester acid esters (B) 0.05%～0.15%
Catalyzer (C) 5.0～10.0%
Unslaked lime (D) 25.0%～50.0%
Water-holding agent (E) 35.0%～60.0%;
Said plastic expansion source is the hydrolysis of the cement slurry plastic stage RM of getting angry, and is p-nitrophenyl diazonium fluoride borate, NSC 263496, N, the mixture of N-dicyclohexyl-2-[4-morpholinodithio sulphenamide;
Said catalyzer is made up of Lithium Hydroxide MonoHydrate or Pottasium Hydroxide.
2. the special-purpose plastic expansion agent of cement-based grout material according to claim 1; It is characterized in that said hard ester acid esters is made up of in sorbitol anhydride Stearinsaeure, ten poly-glycerol, two hard ester acid esters, stearin, mono-glycerides, the 18 triglyceride one or more.
3. the special-purpose plastic expansion agent of cement-based grout material according to claim 1 is characterized in that said water-holding agent, is made up of in wilkinite, zeyssatite, smectite, the zeolite powder one or more.
4. the method for the special-purpose plastic expansion agent of the cement-based grout material for preparing one of claim 1-3; It is characterized in that: difference is weighing plastic expansion source (A), hard ester acid esters (B), catalyzer (C), unslaked lime (D), water-holding agent (E) component by weight percentage; Earlier plastic expansion source (A), hard ester acid esters (B) component are dropped into ball mill; Fully grinding the back takes out; Together put into stirrer with catalyzer (C) component and stir, in whipping process, add unslaked lime (D) more successively, water-holding agent (E) component stirs and gets final product.
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| CN103342498B (en) * | 2013-07-10 | 2014-10-01 | 南京瑞迪高新技术有限公司 | Liquid plasticity expanding agent special for CA (Cellulose Acetate) mortar and preparation method thereof |
| CN104724968B (en) * | 2013-09-11 | 2018-03-09 | 武汉格瑞林建材科技股份有限公司 | The plastic expansion agent and preparation method thereof of upper flow regime cement-based gelling material anti-settling |
| CN104529353B (en) * | 2014-12-20 | 2017-01-11 | 平顶山市中裕新材料制造有限公司 | Inorganic expansive grouting material for mine gas sealing layer and preparation method of expansive grouting material |
| CN105271919B (en) * | 2015-11-06 | 2018-03-13 | 湖北工业大学 | A kind of Xu puts type cement-based gelling material plastic expansion agent and preparation method thereof |
| CN106186932A (en) * | 2016-07-12 | 2016-12-07 | 江苏蓝圈新材料有限公司 | A kind of strength cement-based grouting material and preparation method thereof |
| CN106630717A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent |
| CN108147711A (en) * | 2018-02-05 | 2018-06-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of water conservancy project high water head flood discharging tunnel underplate concrete rift defect inhibitor and preparation method thereof |
| CN108275908A (en) * | 2018-02-05 | 2018-07-13 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of low grade high flowability concrete plasticity micro-crack defect inhibitor and preparation method thereof |
| CN108585579B (en) * | 2018-06-12 | 2020-12-22 | 金华市欣创防水科技有限公司 | Zeolite-based plastic expanding agent |
| CN111439981B (en) * | 2020-04-03 | 2022-02-15 | 中建材中岩科技有限公司 | Low-temperature sleeve grouting material for connecting steel bars and application method thereof |
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