Polymer modifier for concrete, preparation method thereof, and impermeable and waterproof concrete
An anti-seepage and waterproof concrete technology, applied in the field of composite materials, can solve the problems of poor concrete anti-seepage and water resistance, cement particle aggregation, incomplete cement hydration, etc., to avoid incomplete hydration, reduce interfacial tension, and improve anti-seepage. Osmotic effect
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[0020] The invention provides a method for preparing a polymer modifier for concrete, which includes the following steps:
[0021] S1 Weigh the polymer emulsion, silica sol and silane coupling agent according to the weight ratio;
[0022] S2 After mixing the silica sol, the silane coupling agent and the polymer emulsion, the mixed solution is obtained by ultrasonic treatment. The ultrasonic conditions are: ultrasonic time 3min-10min, ultrasonication is performed at room temperature.
[0023] The present invention provides an impermeable and waterproof concrete, which includes components in the following proportions by weight: 230 parts to 360 parts of cement, 60 parts to 100 parts of fly ash, 28 parts to 50 parts of expansion agent, 650 parts to 820 parts of fine Aggregate, 950 parts to 1100 parts of coarse aggregate, 4.35 parts to 5.85 parts of water reducing agent, 100 parts to 150 parts of water, 0.85 parts to 1.35 parts of antifoaming agent and 40 parts to 80 parts of polymer mod...
Example Embodiment
[0032] Example 1
[0033] A polymer modifier for concrete, comprising a polymer emulsion and an interface modifier. The interface modifier includes a silica sol and a silane coupling agent; the addition amount of the polymer emulsion and the interface modifier is 1:0.2 . The polymer emulsion is a styrene-acrylic emulsion.
[0034] The preparation method is:
[0035] S1 Weigh the polymer emulsion, silica sol and silane coupling agent according to the weight ratio;
[0036] S2 The silica sol, the silane coupling agent and the polymer emulsion are mixed and then subjected to ultrasonic treatment to obtain a mixed solution. The ultrasonic conditions are as follows: the ultrasonic time is 5 minutes, and the ultrasonic is performed at room temperature.
Example Embodiment
[0037] Example 2
[0038] The difference between this example and Example 1 is that the addition amount of the polymer emulsion and the interface modifier is 1:0.4.
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