Composite air-entraining agent and its preparation method and cement-based material
A cement-based material and air-entraining agent technology, applied in the field of concrete mortar, can solve the problems of poor stability of air-entraining agent bubbles, loss of strength of cement-based materials, low comprehensive performance, etc., achieve good frost resistance, small strength reduction, The effect of fine and uniform bubbles
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preparation example 1
[0052] A preparation method of composite air-entraining agent, comprising the following steps:
[0053] Mix the sulfonate air-entraining agent and the polyether-type cell structure regulator uniformly with a high-speed mixer to obtain a composite air-entraining agent, wherein the polyether-type cell structure regulator is added in an amount of 2wt% to the composite air-entraining agent ;
[0054] Among them, the sulfonate air-entraining agent is sodium α-alkenyl sulfonate;
[0055] The polyether cell structure regulator is prepared by block copolymerization in the following preparation method:
[0056] Mix 9.2g of glycerin and sodium hydroxide catalyst, stir, first raise the temperature to 80°C, and then raise the temperature to 110°C after vacuuming, and pass in 50.8g of propylene oxide, 15g of 1,2-epoxybutylene, 25g of epoxy Ethane, keep the temperature at 110°C and react until polymerized to obtain 100g of a polymer with a weight average molecular weight of 1000, add acid...
preparation example 2
[0059] A preparation method of a composite air-entraining agent is carried out according to the method in Preparation Example 1, the difference is that
[0060] Mix the sulfonate air-entraining agent and the polyether-type cell structure regulator uniformly with a high-speed mixer to obtain a composite air-entraining agent, wherein the polyether-type cell structure regulator is added in an amount of 10wt% to the composite air-entraining agent ;
[0061] The polyether cell structure regulator is prepared by block copolymerization in the following preparation method:
[0062] Mix 3.1g of glycerin and sodium hydroxide catalyst, stir, first raise the temperature to 100°C, then raise the temperature to 120°C after vacuuming, and feed 56.9g of propylene oxide, 15g of 1,2-butylene oxide, and 25g of ethylene oxide in sequence Alkanes, keep the temperature at 120°C and react until polymerized to obtain 100g of a polymer with a weight-average molecular weight of 3000, add acid to neutr...
preparation example 3
[0065] A preparation method of a composite air-entraining agent is carried out according to the method in Preparation Example 1, the difference is that
[0066] Mix the sulfonate air-entraining agent and the polyether-type cell structure regulator with a high-speed mixer to obtain a composite air-entraining agent, wherein the addition of the polyether-type cell structure regulator to the composite air-entraining agent is 5 wt%. ;
[0067] The polyether cell structure regulator is prepared by block copolymerization in the following preparation method:
[0068] Mix 4.6g of glycerin and sodium hydroxide catalyst, stir, first raise the temperature to 90°C, then raise the temperature to 110°C after vacuuming, and then feed 55.4g of propylene oxide, 15g of 1,2-butylene oxide, and 25g of ethylene oxide in sequence Alkanes, keep the temperature at 110°C until the polymerization to obtain 100g of polymers with a weight average molecular weight of 2000, add acid to neutralize the catal...
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