CN102172978A - Anti-cracking curing method for concrete - Google Patents
Anti-cracking curing method for concrete Download PDFInfo
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- CN102172978A CN102172978A CN 201110026506 CN201110026506A CN102172978A CN 102172978 A CN102172978 A CN 102172978A CN 201110026506 CN201110026506 CN 201110026506 CN 201110026506 A CN201110026506 A CN 201110026506A CN 102172978 A CN102172978 A CN 102172978A
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Abstract
The invention discloses an anti-cracking curing method for concrete, and belongs to the technical field of building material curing. High water absorption resin granules for adsorbing water are added into the concrete in the concrete stirring process. According to the method, on the premise of keeping the water cement ratio unchangeable, the actual water cement ratio is increased, the water holding property of the concrete is effectively improved, early shrinkage stress is dispersed, shrinkage cracking of the concrete is prevented, meanwhile, the concrete is in a cured state for a long term, the curing effect and the later strength of the cast concrete are improved, the curing cost of the cast concrete is effectively reduced, and the construction process is simplified.
Description
Technical field
The invention belongs to construction material maintenance technology field, be specifically related to a kind of method of concrete anticracking maintenance.
Background technology
The concrete cast must be carried out maintenance later in the initial set process, promptly keep necessary humidity, makes it have enough moisture to guarantee that hydration reaction is complete.Present domestic concrete curing technological core is exactly moistening or add sealing compound and make it form the volatilization that water barrier stops mixing water at concrete surface by maintenances concrete surfaces such as watering maintenance, covering curings, and the realization concrete is from maintenance.
Can be in its pore in the concrete aqueous solution evaporate process form " meniscus " infiltration phenomenon, so pore water solution can produce tension to hole wall, thereby cause showing volume contraction on the concrete macroscopic view.Yet above-mentioned these maintaining process are not well positioned to meet the requirement that continues to keep humidity during the concrete formation, often make the concrete formation initial stage dry contraction fissure occur because of maintenance is improper in the actual engineering.The adding of economization agent can slow down concrete rate-of-loss of coolant, thereby effectively reduces concrete shrinkage cracking.But this economization agent exists in application that volume is big, cost is high, and exists and the consistency problem of other additive and because of delaying the early strength problem that hydrated cementitious speed causes.
At present domestic open application number is that 200910026405 " shrinkage reducing and curing agent for concrete " and application number are that two patents of 2009101103999 " multifunctional cement concrete reducing and anti-cracking curing agent " have been set forth economization agent and sealing compound compound as a kind of novel shrinkage reducing and curing agent for concrete, it is sprayed on concrete surface reduces concrete shrinkage and moisture loss speed, its principle be with reduce that component and film-forming components are dissolved each other or physical mixed after, be sprayed at concrete surface, thereby its tapered section is used to reduce the surface tension of concrete pore solution and reduces concrete surface and shrink, and the maintenance part is is then scattered and disappeared to prevent that water from dividing at the organic or inorganic film that concrete surface forms one deck densification.Yet this economization agent mixes the back and exists and to reduce the problem that component and sealing compound film-forming components influence each other and disturb with sealing compound, therefore can not give full play to the two and reduce maximum efficiency with water conservation; Application number is that 201010104372.0 " a kind of cement concrete curing method " adopts behind the spraying economization agent earlier the method for spraying sealing compound to avoid this problem, but has brought inconvenience to construction; The patent No. is that " being used to prevent anti-cracking curing agent and its production method and the application thereof of concrete cracking " patent utilization Aethoxy Sklerol mixture of 200710029782.1 lowers surface tension and realizes reducing, but this anti-cracking curing agent film forming function is relatively poor, and the dry dehydration situation of concrete does not significantly improve.
Summary of the invention
The purpose of this invention is to provide a kind of low cost, be convenient to construct and can prevent more effectively that concrete shrinkage from ftractureing, improving the concrete anticracking maintenance technology of maintenance effect.
A kind of method of concrete anticracking maintenance is characterized in that, adds the super absorbent resin particle of the certain water of absorption in the concrete mixing process.
Described super absorbent resin particle is the polymer-modified of the copolymer of appropriately crosslinked polyacrylic acid resinoid, polyacrylamide resinoid, acrylic acid and acrylamide or acrylic acid and acrylamide.
The polymer-modified of described acrylic acid and acrylamide is the grafting modified of starch acrylic acid-acrylamide copolymer.
The mass ratio of described adsorbed water and super absorbent resin particle is (30～1000): 1.
The mass ratio that described super absorbent resin particle accounts for cement is 0.01%～3%.
Beneficial effect of the present invention: method of the present invention reduces concrete shrinkage under the double action of reducing with water-preserving curing greatly, prevents that effectively shrinkage cracking from appearring in concrete, and guarantees that aquation fully carries out; High hydroscopic resin is nonpoisonous and tasteless, environmentally safe, and volume is few, easy to use, is applicable to various construction environments and engineering, especially dry area; In addition, the later stage need not to continue concrete is carried out other moisture-keeping maintaining measures, simplifies the later stage maintaining process greatly and to the monitoring of maintenance effect, has saved the maintenance cost.
The specific embodiment
The present invention is described in further detail below in conjunction with the specific embodiment and experimental data.
Embodiment 1: when the ratio of mud is 0.3 mortar mix, mixing water absorption is the macromolecule resin of 50 times of sole masses, wherein, macromolecule resin dry powder volume accounts for 0.4% of cement quality, under the sealed maintenance condition, carry out the self-constriction test then, and the test specimen under the standard curing condition carried out strength test, experimental result is as follows:
Table 1 embodiment mortar shrinkage experimental result
Table 2 embodiment mortar strength experimental result
Embodiment 2: when the ratio of mud is 0.5 mortar mix, mixing water absorption is the macromolecule resin of 50 times of sole masses, wherein, macromolecule resin dry powder volume accounts for 0.3% of cement quality, under the sealed maintenance condition, carry out the self-constriction test then, and the test specimen under the standard curing condition carried out strength test, experimental result is as follows:
Table 3 embodiment mortar shrinkage experimental result
Table 4 embodiment mortar strength experimental result
Embodiment 3: when the ratio of mud is 0.4 mortar mix, mixing water absorption is the macromolecule resin of 50 times of sole masses, wherein, macromolecule resin dry powder volume accounts for 1% of cement quality, under the sealed maintenance condition, carry out the self-constriction test then, and the test specimen under the standard curing condition carried out strength test, experimental result is as follows:
Table 5 embodiment mortar shrinkage experimental result
Table 6 embodiment mortar strength experimental result
Novel anti-crack maintenance technology of the present invention is adopted in the explanation of above instantiation, can obviously reduce concrete early-age shrinkage, with 1 day and 3 days to reduce effect the most obvious; And and later strength there is certain enhancing effect.
Claims (5)
1. the method for a concrete anticracking maintenance is characterized in that, adds the super absorbent resin particle of the certain water of absorption in the concrete mixing process.
2. according to the method for the described a kind of concrete anticracking maintenance of claim 1, it is characterized in that described super absorbent resin particle is the polymer-modified of the copolymer of appropriately crosslinked polyacrylic acid resinoid, polyacrylamide resinoid, acrylic acid and acrylamide or acrylic acid and acrylamide.
3. according to the method for the described a kind of concrete anticracking maintenance of claim 2, it is characterized in that the polymer-modified of described acrylic acid and acrylamide is the grafting modified of starch acrylic acid-acrylamide copolymer.
4. according to the method for the described a kind of concrete anticracking maintenance of claim 1, it is characterized in that the mass ratio of described adsorbed water and super absorbent resin particle is (30～1000): 1.
5. according to the method for the described a kind of concrete anticracking maintenance of claim 1, it is characterized in that the mass ratio that described super absorbent resin particle accounts for cement is 0.01%～3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110026506 CN102172978A (en) | 2011-01-25 | 2011-01-25 | Anti-cracking curing method for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110026506 CN102172978A (en) | 2011-01-25 | 2011-01-25 | Anti-cracking curing method for concrete |
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| CN102172978A true CN102172978A (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110026506 Pending CN102172978A (en) | 2011-01-25 | 2011-01-25 | Anti-cracking curing method for concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481470A (en) * | 2014-09-19 | 2016-04-13 | 新疆建筑科学研究院（有限责任公司） | Additive used in concrete internal curing |
| CN106927744A (en) * | 2017-03-31 | 2017-07-07 | 天津大学 | The self-healing method of high performance cement-based material inside microcrack |
| CN109987899A (en) * | 2019-04-17 | 2019-07-09 | 桂林理工大学 | It is a kind of with reinforcement, it is interior maintenance and compensation contractile function preparation method of concrete |
| CN112661458A (en) * | 2020-12-25 | 2021-04-16 | 北京金隅混凝土有限公司 | Crack-resistant large-volume concrete and preparation method thereof |
| CN113387652A (en) * | 2021-06-30 | 2021-09-14 | 西安建祥建材科技有限公司 | Anti-cracking anti-seepage self-repairing C35 mass concrete |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043487A (en) * | 1988-12-19 | 1990-07-04 | 钱根成 | The concrete making method of slag structure material |
| JP2979048B2 (en) * | 1988-12-16 | 1999-11-15 | 徳人 柴田 | Forming method for concrete roof |
| CN1657481A (en) * | 2005-01-24 | 2005-08-24 | 山东科技大学 | Water-preserving agent for cement |
| WO2007104494A1 (en) * | 2006-03-10 | 2007-09-20 | Construction Research & Technology Gmbh | Fluorine-modified additive for cementitious products, process for its preparation and use thereof |
| CN101775801A (en) * | 2010-02-10 | 2010-07-14 | 王军 | Novel self maintenance cement soil pile |
| CN101863072A (en) * | 2010-06-11 | 2010-10-20 | 东南大学 | Internal curing process for improving performance of high strength and slight expansion concrete |
-
2011
- 2011-01-25 CN CN 201110026506 patent/CN102172978A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2979048B2 (en) * | 1988-12-16 | 1999-11-15 | 徳人 柴田 | Forming method for concrete roof |
| CN1043487A (en) * | 1988-12-19 | 1990-07-04 | 钱根成 | The concrete making method of slag structure material |
| CN1657481A (en) * | 2005-01-24 | 2005-08-24 | 山东科技大学 | Water-preserving agent for cement |
| WO2007104494A1 (en) * | 2006-03-10 | 2007-09-20 | Construction Research & Technology Gmbh | Fluorine-modified additive for cementitious products, process for its preparation and use thereof |
| CN101775801A (en) * | 2010-02-10 | 2010-07-14 | 王军 | Novel self maintenance cement soil pile |
| CN101863072A (en) * | 2010-06-11 | 2010-10-20 | 东南大学 | Internal curing process for improving performance of high strength and slight expansion concrete |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481470A (en) * | 2014-09-19 | 2016-04-13 | 新疆建筑科学研究院（有限责任公司） | Additive used in concrete internal curing |
| CN106927744A (en) * | 2017-03-31 | 2017-07-07 | 天津大学 | The self-healing method of high performance cement-based material inside microcrack |
| CN109987899A (en) * | 2019-04-17 | 2019-07-09 | 桂林理工大学 | It is a kind of with reinforcement, it is interior maintenance and compensation contractile function preparation method of concrete |
| CN112661458A (en) * | 2020-12-25 | 2021-04-16 | 北京金隅混凝土有限公司 | Crack-resistant large-volume concrete and preparation method thereof |
| CN113387652A (en) * | 2021-06-30 | 2021-09-14 | 西安建祥建材科技有限公司 | Anti-cracking anti-seepage self-repairing C35 mass concrete |
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Application publication date: 20110907 |