Preparation method of concrete antifreezing agent
An antifreeze and concrete technology, applied in the field of concrete additives, can solve the problems of poor antifreeze effect and large amount of antifreeze added to achieve good antifreeze, increase energy storage effect, and improve cohesion
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[0024] A preparation method of concrete antifreeze, the preparation method comprises the steps of:
[0025] (1) Put the mixture, water and auxiliary agent into the reactor according to the mass ratio of 7:12~16:1~3, stir evenly, then add the mixture A with 20~30% of the weight of the mixture, nitrogen protection, adjust When the pH reaches 3-4, add formaldehyde with a mass of 25-40% of the mixture, heat up to 80-90°C, and keep warm for 6-9 hours;
[0026] (2) After the heat preservation is over, add glutaraldehyde with a mass of 13-16% of the mixture, stir evenly, keep heat for 4-7 hours, cool down to room temperature, discharge, freeze-dry, and collect the dry matter;
[0027] (3) In terms of parts by weight, take 160-180 parts of water, 50-55 parts of mixed monomers, 25-30 parts of urea, 15-20 parts of dry matter, 6-9 parts of ammonium chloride, 6-13 parts of poly Acrylamide, 1-4 parts of surfactant, put water, mixed monomer, dry matter and surfactant into the reaction kett...
Embodiment 1
[0030] The mixture is made of polyvinyl alcohol and polyacrylamide in a mass ratio of 9:4
[0031] The auxiliary agent is any one of sodium dodecylbenzenesulfonate and sodium lauryl sulfate.
[0032] Mixture A is made by mixing sodium alginate and chitosan at a mass ratio of 1:10.
[0033] The mixed monomers are formaldehyde and acrylic acid mixed uniformly at a mass ratio of 10:3.
[0034] The surfactant is any one of alkylphenol polyoxyethylene ether and fatty acid polyoxyethylene ester.
[0035] A preparation method of concrete antifreeze, the preparation method comprises the steps of:
[0036] (1) Put the mixture, water, and auxiliary agent into the reactor at a mass ratio of 7:16:3, stir evenly, then add mixture A with 20-30% of the weight of the mixture, under nitrogen protection, adjust the pH to 4, Then add formaldehyde with 40% of the mass of the mixture, raise the temperature to 90°C, and keep the temperature for 9 hours;
[0037] (2) After the heat preservation ...
Embodiment 2
[0041] The mixture is made of polyvinyl alcohol and polyacrylamide in a mass ratio of 9:3
[0042] The auxiliary agent is any one of sodium dodecylbenzenesulfonate and sodium lauryl sulfate.
[0043] Mixture A is prepared by mixing sodium alginate and chitosan at a mass ratio of 1:8.
[0044] The mixed monomers are formaldehyde and acrylic acid mixed uniformly at a mass ratio of 10:2.
[0045] The surfactant is any one of alkylphenol polyoxyethylene ether and fatty acid polyoxyethylene ester.
[0046] A preparation method of concrete antifreeze, the preparation method comprises the steps of:
[0047] (1) Put the mixture, water, and auxiliary agent into the reactor at a mass ratio of 7:15:2, stir evenly, then add mixture A with 25% of the weight of the mixture, under nitrogen protection, adjust the pH to 3, and then add Formaldehyde with 30% of the mass of the mixture is heated to 85°C and kept for 8 hours;
[0048] (2) After the heat preservation is over, add glutaraldehyd...
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