The purpose of this technology is to provide an anti-segregation agent for concrete and a preparation method thereof to solve the problem that the existing anti-segregation agent for concrete proposed in the above background technology has a strong flocculation effect , which will cause the concrete to settle quickly and the concrete to lose its flow properties instantly, which is detrimental to the workability of the concrete.
In order to achieve the above objectives, the present invention provides the following technical solution: an anti-segregation agent for concrete, the composition of the anti-segregation agent for concrete is as follows:
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5-15 parts of fly ash, 5-15 parts of mineral powder, 1-2 parts of steel fiber, 1-2 parts of polyethylene glycol, polyhydroxy acid 20-30 parts of water agent, 0.8-1.2 parts of tackifier, 0.5-0.9 parts of coagulant, 200-300 parts of deionized water, several parts of liquid alkali, 5-10 parts of silicone monomer, 3-5 oxidants 1-3 parts of reducing agent.
Preferably, the organosilicon monomer is propyltrichlorosilane or vinyltrichlorosilane or fluorosilicone monomer or a mixture of the three.
Preferably, the coagulant is powdered sodium sulfate.
Preferably, the tackifier is PAM, and PAM is moistened with methanol or ethanol, deionized water is added for stirring, and the mixture is heated to 55 degrees Celsius during stirring. , prepared into a solution with a concentration of 4%.
Preferably, the oxidant is one or a mixture of hydrogen peroxide, ammonium persulfate, and potassium persulfate.
Preferably, the reducing agent is ammonium persulfate-anhydrous sodium bisulfite or ammonium persulfate-sodium hypophosphite.
Preferably, the alkali solution is sodium hydroxide.
Preferably, the preparation method of the concrete anti-segregation agent includes the following steps:
S1 : Mixing: Add silicone monomer, deionized water, polyhydroxyacid superplasticizer and polyethylene glycol into the reactor and mix;
S2 : Oxidation: Stir until the mixture in step S1 is evenly mixed, and add oxidant to oxidize;
S3: Reduction: Add powder to the oxidation mixture in step S2 Coal ash, mineral powder and steel fiber, and then add reducing agent;
S4: Neutralization: Add tackifier to the reduced mixture in step S3 and coagulant, stir continuously until the mixture is uniform, and then add liquid caustic soda to adjust the pH so that the pH is between 7-9, and then the anti-segregation agent for concrete can be obtained. </p
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