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Preparation method of concrete internal curing agent
The invention provides a preparation method of a concrete internal curing agent. The preparation method comprises steps as follows: acrylamide, hydrophobic monomers, ethanol, a cross-linking agent and an initiator are uniformly mixed and heated to 50-70 DEG C and react for 4-10 h, gel is generated and subjected to conventional after-processing, and a shell material adopting a hydrophobic structure is obtained; deionized water, 2-acrylamide-2-methyl propane sulfonic acid, sodium hydroxide and a cross-linking agent are sequentially and uniformly mixed, and a nuclear solution is obtained; the shell material adopting the hydrophobic structure is added and soaked for 30-60 min, the shell material is filtered and put in a microwave reactor to react for 1-5 min, and finally, the concrete internal curing agent is obtained after conventional after-processing. According to the method, a preparation process is simple and convenient, a chemical structure is easy to control, the water absorption rate is lower due to the outer hydrophobic structure of the prepared internal curing agent, and influence of the internal curing agent on workability of concrete can be reduced; the early self-constriction and reduction effect on the concrete is improved by means of the inner hydrophilic structure, and the problem of early cracking of the concrete is solved.
Preparation method of concrete internal curing agent
The invention provides a preparation method of a concrete internal curing agent. The preparation method comprises steps as follows: acrylamide, hydrophobic monomers, ethanol, a cross-linking agent and an initiator are uniformly mixed and heated to 50-70 DEG C and react for 4-10 h, gel is generated and subjected to conventional after-processing, and a shell material adopting a hydrophobic structure is obtained; deionized water, 2-acrylamide-2-methyl propane sulfonic acid, sodium hydroxide and a cross-linking agent are sequentially and uniformly mixed, and a nuclear solution is obtained; the shell material adopting the hydrophobic structure is added and soaked for 30-60 min, the shell material is filtered and put in a microwave reactor to react for 1-5 min, and finally, the concrete internal curing agent is obtained after conventional after-processing. According to the method, a preparation process is simple and convenient, a chemical structure is easy to control, the water absorption rate is lower due to the outer hydrophobic structure of the prepared internal curing agent, and influence of the internal curing agent on workability of concrete can be reduced; the early self-constriction and reduction effect on the concrete is improved by means of the inner hydrophilic structure, and the problem of early cracking of the concrete is solved.
Preparation method of concrete internal curing agent
ZHANG XIAOLEI (author) / LIU JIAPING (author) / LI LEI (author) / WANG WENBIN (author) / WANG RUI (author) / LI QUANLONG (author) / WANG WEI (author) / LI MING (author) / TIAN QIAN (author)
2016-02-17
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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