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Preparation method of silane modified concrete internal curing agent
The invention provides a preparation method of a silane modified concrete internal curing agent. The preparation method comprises steps as follows: polyvinyl alcohol is completely dissolved in deionized water, a neutralized acrylic acid solution, a cross-linking agent and an initiator are added and uniformly mixed, the mixture is heated to 40-60 DEG C and reacts for 8-12 h, superabsorbent resin gel is obtained and subjected to granulation, drying, crushing, screening and surface crosslinking, and superabsorbent resin is obtained; a silane coupling agent is dissolved in benzene, the superabsorbent resin is added to be sufficiently mixed, the mixture is put in an oven at the temperature of 120-160 DEG C and reacts for 1-2 h, and the final concrete internal curing agent is obtained. According to the method, a preparation process is simple and convenient, a chemical structure is easy to control, the prepared internal curing agent has a lower water absorption rate, influence of the internal curing agent on workability of concrete can be reduced, the early self-constriction and reduction effect of the concrete is improved, and the problem of early cracking of the concrete is solved.
Preparation method of silane modified concrete internal curing agent
The invention provides a preparation method of a silane modified concrete internal curing agent. The preparation method comprises steps as follows: polyvinyl alcohol is completely dissolved in deionized water, a neutralized acrylic acid solution, a cross-linking agent and an initiator are added and uniformly mixed, the mixture is heated to 40-60 DEG C and reacts for 8-12 h, superabsorbent resin gel is obtained and subjected to granulation, drying, crushing, screening and surface crosslinking, and superabsorbent resin is obtained; a silane coupling agent is dissolved in benzene, the superabsorbent resin is added to be sufficiently mixed, the mixture is put in an oven at the temperature of 120-160 DEG C and reacts for 1-2 h, and the final concrete internal curing agent is obtained. According to the method, a preparation process is simple and convenient, a chemical structure is easy to control, the prepared internal curing agent has a lower water absorption rate, influence of the internal curing agent on workability of concrete can be reduced, the early self-constriction and reduction effect of the concrete is improved, and the problem of early cracking of the concrete is solved.
Preparation method of silane modified concrete internal curing agent
LI LEI (author) / ZHANG XIAOLEI (author) / LIU JIAPING (author) / WANG WENBIN (author) / LI QUANLONG (author) / TIAN QIAN (author) / WANG WEI (author) / LI MING (author)
2016-02-17
Patent
Electronic Resource
English
Preparation method of silane modified concrete internal curing agent
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