CN101450849A - Expansion agent for composite high performance grouting - Google Patents
Expansion agent for composite high performance grouting Download PDFInfo
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- CN101450849A CN101450849A CNA2007101784374A CN200710178437A CN101450849A CN 101450849 A CN101450849 A CN 101450849A CN A2007101784374 A CNA2007101784374 A CN A2007101784374A CN 200710178437 A CN200710178437 A CN 200710178437A CN 101450849 A CN101450849 A CN 101450849A
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- grouting
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- high performance
- composite high
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite, e.g. Keene's cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides an expanding agent for comprehensively compensating retracted composite high-performance grouting materials in the early stage, the intermediate stage and the late stage of hydration of the grouting materials. The expanding agent comprises the following raw materials by weight proportion: 10 to 25 portions of microcapsule isocyanate prepolymer, 5 to 20 portions of microcapsule quicklime, 0 to 25 portions of dihydrate gypsum, 0 to 25 portions of anhydrite, 20 to 60 portions of sulphate aluminum cement, 0 to 40 portions of high alumina cement and 2 to 8 portions of bleeding excitant, wherein the raw materials are uniformly mixed. The expanding agent simultaneously has early-stage expansion character and late-stage expansion character; and after the expanding agent is doped into the grouting materials or expansive mortar according to proportion, both the plastic stage and the hardening stage after grouting reveal the expansion character, so that the expanding agent guarantees the grouted density, improves the bearing capacity of a grouting layer, and is convenient for actual operation.
Description
Technical field
The present invention relates to the admixture of a kind of cement-based grouting material (calling the material that is in the milk in the following text) usefulness, especially a kind of expansion agent for composite high performance grouting that uses multiple expansion component to unite compensation grouting material plastic stage and the contraction of sclerosis stage.This swelling agent also can be used for filling uses the expansion mortar.
Background technology
The material that is used for Equipment Foundations grouting in early days is common building mortar and pea gravel concreten, but all there is certain contraction in such material before and after sclerosis, comprise sedimentation contraction, chemical shrinkage and dry shrinkage, cause filling eakiness easily, thereby influence the transmission of load, are subjected to very big influence in precision of equipment installation and work-ing life.Since the last century the eighties, China has introduced a large amount of machinery equipment from external, and the equipment supplier is for support equipment setting accuracy and work-ing life, and regulation is with grouting material perfusion wall screw, the equipment base of microdilatancy, high strength, good fluidity mostly.More common building mortar and the pea gravel concreten of these grouting material had bigger progress, and it mixes common swelling agent in sand-cement slurry, and the contraction after the compensation grouting is improved the grouting degree of compactness.But because common swelling agent only works in the hardening of cement phase, its rate of expansion is very low.And as a kind of self-leveling material, the grouting material is early stage to exist bigger sedimentation to shrink, and sedimentation is shunk can account for more than 85% of whole contraction, therefore still exists and fills the not enough risk of degree of compactness, and operation brings hidden danger to equipment.
For addressing the above problem, need development to have the NEW TYPE OF COMPOSITE high performance expansion admixture of early expansion performance and late expansion performance, after mixing a certain proportion of this composite expanding agent in grouting material or the expansion mortar, plastic stage after the perfusion and sclerosis stage all demonstrate expansion character.
Summary of the invention
The present invention is in order to solve the difficult problem that present commercially available grouting material grouting quality (grouting degree of compactness, effective bearing area) can't guarantee, overcome the defective of common commercially available swelling agent, comprehensive expansion character that improves the grouting material is expected the expansion agent for composite high performance grouting that phase aquation morning, noon and afternoon shrinks and propose a kind of comprehensive compensation grouting.
Expansion agent for composite high performance grouting of the present invention, the content that following raw materials according is arranged and measure by weight:
Microcapsule isocyanate prepolymer 10-25 part
Microcapsule unslaked lime 5-20 part
Dihydrate gypsum 0-25 part
Anhydrite 0-25 part
Aluminosulfate cement 20-60 part
High-alumina cement 0-40 part
Bleed exciting agent 2-8 part.
Above-mentioned raw materials mixes and gets final product.
In the above-mentioned swelling agent, selecting molecular weight for use is 2000～10000 isocyanate prepolymer, adopt commercially available finished product to get final product, the isocyanate prepolymer of 1 part (all by weight) the 1mm quartz sand with 8 parts is mixed, the saturated fatty acid that adds 0.5 part again, grinding is 15 minutes in ball mill, forms described microcapsule isocyanate prepolymer.
In the above-mentioned swelling agent, described microcapsule unslaked lime is that the saturated fatty acid blend grinding of the unslaked lime of 20 parts (all by weight) and 1 part is formed to fineness＜0.63mm.
In the above-mentioned swelling agent, described bleed exciting agent is an aldehyde-ketone condensate, and the aldehyde-ketone condensate molecular weight is 8000～15000.
The mechanism of intumescence of expansion agent for composite high performance grouting is, after grouting expects that adding water mixes and stirs, the microcapsule isocyanate prepolymer is under the effect of bleed exciting agent, the microcapsule on surface dissolve gradually, the isocyanate prepolymer that quartz sand surface soaks into progressively reacts with water, generate carbon dioxide and make the grouting material produce plastic expansion, effectively the early stage plastic shrinkage that exists in compensation grouting back; Along with the setting and harden of grouting material, the crust of microcapsule unslaked lime is dissolved gradually, and unslaked lime and water generate Ca (OH)
2Cause volumetric expansion, the aquation contraction in mid-term is expected in compensation grouting, and aluminosulfate cement (and/or high-alumina cement) and dihydrate gypsum (and/or anhydrite) reaction generate ettringite, with compensation drying shrinkage and the shrinkage of grouting middle and later periods, three kinds of expansion sources synergies, make the grouting material in whole process of setting, all be in swelling state, thereby guarantee the degree of compactness of being in the milk, improve the supporting capacity of grout blanket.
With composite high-performance swelling agent of the present invention, volume according to weight ratio 5%～10% fits in the grouting material, the employing German History comes the expansion character after the Shrinkage Cone laser of objective case company shrinks survey meter (see figure 1) mensuration grouting material blunge, and the typical expansion curve of gained is seen Fig. 2.And expect that with the common grouting that the normal volume of common swelling agent fits in its expansion curve sees Fig. 3, if when construction, increase the mixing water amount, very easily produce the expansion curve of Fig. 4, thereby cause the grouting failure.Above-mentioned contrast shows, composite high-performance swelling agent of the present invention mixing water amount less demanding during to construction is convenient to actually operating.
Description of drawings
Fig. 1 is that laser shrinks survey meter;
Fig. 2 is the typical expansion curve that mixes high-performance composite expanding agent grouting material;
Fig. 3 is the expansion curve of common grouting material;
Fig. 4 is that common grouting material adds the expansion curve of water after excessive.
Embodiment
The raw material of each embodiment of expansion agent for composite high performance grouting of the present invention and listed by weight the content such as the table 1 of metering.
Table 1
| Sequence number | The microcapsule isocyanate prepolymer | Microcapsule unslaked lime | Dihydrate gypsum | Anhydrite | Aluminosulfate cement | High-alumina cement | The bleed |
| Embodiment | |||||||
| 1 | 10 | 20 | 10 | 10 | 60 | 0 | 2 |
| |
12 | 15 | 20 | 0 | 20 | 40 | 3 |
| Embodiment 3 | 15 | 15 | 25 | 0 | 20 | 21 | 4 |
| |
20 | 10 | 0 | 25 | 30 | 9 | 6 |
| Embodiment 5 | 25 | 5 | 18 | 0 | 20 | 21 | 8 |
Expansion agent for composite high performance grouting according to above-mentioned weight ratio preparation, 6% and 8% volume is made into the grouting material by weight percentage again, establishing criteria " cement-based grouting material operating technique rules " YB/T9261-98 appendix A method test, the measurement result of water consumption, degree of mobilization and vertical rate of expansion is shown in table 2, table 3:
The grouting material flows and expansion character during table 2. volume 6%
The grouting material flows and expansion character during table 3. volume 8%
Claims (6)
1, a kind of expansion agent for composite high performance grouting is characterized in that being obtained by following mixing by weight the raw material that measures:
Microcapsule isocyanate prepolymer 10-25 part
Microcapsule unslaked lime 5-20 part
Dihydrate gypsum 0-25 part
Anhydrite 0-25 part
Aluminosulfate cement 20-60 part
High-alumina cement 0-40 part
Bleed exciting agent 2-8 part.
2, expansion agent for composite high performance grouting according to claim 1, it is characterized in that, described microcapsule isocyanate prepolymer is to be that 1 part isocyanate prepolymer mixes with 8 parts 1mm quartz sand with weight ratio, the saturated fatty acid that adds 0.5 part again, grinding formed in 15 minutes in ball mill.
3, expansion agent for composite high performance grouting according to claim 2 is characterized in that, described isocyanate prepolymer molecular weight is 2000～10000.
4, expansion agent for composite high performance grouting according to claim 1 is characterized in that, described microcapsule unslaked lime is to be that the saturated fatty acid blend grinding of 20 parts unslaked lime and 1 part forms to fineness＜0.63mm with weight ratio.
According to arbitrary described expansion agent for composite high performance grouting in the claim 1 to 4, it is characterized in that 5, described bleed exciting agent is an aldehyde-ketone condensate.
6, expansion agent for composite high performance grouting according to claim 5 is characterized in that, described aldehyde-ketone condensate molecular weight is 8000～15000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101784374A CN101450849B (en) | 2007-11-30 | 2007-11-30 | Expansion agent for composite high performance grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101784374A CN101450849B (en) | 2007-11-30 | 2007-11-30 | Expansion agent for composite high performance grouting |
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| Publication Number | Publication Date |
|---|---|
| CN101450849A true CN101450849A (en) | 2009-06-10 |
| CN101450849B CN101450849B (en) | 2011-08-24 |
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| CN2007101784374A Expired - Fee Related CN101450849B (en) | 2007-11-30 | 2007-11-30 | Expansion agent for composite high performance grouting |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351492A (en) * | 2011-07-15 | 2012-02-15 | 郑州大学 | Machine-made sand light-expansion high early strength grouting material and preparation method thereof |
| CN102464463A (en) * | 2010-11-09 | 2012-05-23 | 中冶武汉冶金建筑研究院有限公司 | Compound high-performance expanding agent for cement-based material |
| CN102491669A (en) * | 2011-11-14 | 2012-06-13 | 南京瑞迪高新技术有限公司 | Special plastic expansion agent for cement-based grouting material and preparation method of same |
| CN104003639A (en) * | 2014-05-09 | 2014-08-27 | 中国铁道科学研究院铁道建筑研究所 | Overall-process anti-shrink agent for cement-based material and preparation method thereof |
| CN104529353A (en) * | 2014-12-20 | 2015-04-22 | 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 |
| CN108503250A (en) * | 2018-03-07 | 2018-09-07 | 湖北乾道新型材料有限责任公司 | Cement expansive material and preparation method |
| CN109250971A (en) * | 2018-11-20 | 2019-01-22 | 长沙凯天工研院环保服务有限公司 | A kind of water-swellable delay curing material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4746365A (en) * | 1985-02-19 | 1988-05-24 | Construction Products Research, Inc. | Utilization of latexes with hydraulic cement and gypsum compositions |
| CN1040741C (en) * | 1994-01-28 | 1998-11-18 | 石家庄市特种水泥厂 | High-efficiency concrete expansion admixture and preparing process thereof |
| CN1182065C (en) * | 2002-07-11 | 2004-12-29 | 武汉武大巨成加固实业有限公司 | Fast anchor type inorganic viscose grouting matenial and its preparing process |
-
2007
- 2007-11-30 CN CN2007101784374A patent/CN101450849B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464463A (en) * | 2010-11-09 | 2012-05-23 | 中冶武汉冶金建筑研究院有限公司 | Compound high-performance expanding agent for cement-based material |
| CN102464463B (en) * | 2010-11-09 | 2013-12-11 | 中冶武汉冶金建筑研究院有限公司 | Compound high-performance expanding agent for cement-based material |
| CN102351492A (en) * | 2011-07-15 | 2012-02-15 | 郑州大学 | Machine-made sand light-expansion high early strength grouting material and preparation method thereof |
| CN102351492B (en) * | 2011-07-15 | 2013-07-31 | 郑州大学 | Machine-made sand light-expansion high early strength grouting material and preparation method thereof |
| CN102491669A (en) * | 2011-11-14 | 2012-06-13 | 南京瑞迪高新技术有限公司 | Special plastic expansion agent for cement-based grouting material and preparation method of same |
| CN102491669B (en) * | 2011-11-14 | 2012-12-26 | 南京瑞迪高新技术有限公司 | Special plastic expansion agent for cement-based grouting material and preparation method of same |
| CN104003639A (en) * | 2014-05-09 | 2014-08-27 | 中国铁道科学研究院铁道建筑研究所 | Overall-process anti-shrink agent for cement-based material and preparation method thereof |
| CN104529353A (en) * | 2014-12-20 | 2015-04-22 | 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 |
| CN108503250A (en) * | 2018-03-07 | 2018-09-07 | 湖北乾道新型材料有限责任公司 | Cement expansive material and preparation method |
| CN109250971A (en) * | 2018-11-20 | 2019-01-22 | 长沙凯天工研院环保服务有限公司 | A kind of water-swellable delay curing material |
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| Publication number | Publication date |
|---|---|
| CN101450849B (en) | 2011-08-24 |
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Assignee: Tianjin Yejian Special Materials Co.,Ltd. Assignor: China Jingye Engineering Technology Co., Ltd. Contract record no.: 2011110000174 Denomination of invention: Expansion agent for composite high performance grouting Granted publication date: 20110824 License type: Exclusive License Open date: 20090610 Record date: 20110927 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20191130 |