An anti-segregation agent for concrete. The composition of the anti-segregation agent for concrete is as follows:
5-15 parts of fly ash, 5-15 parts of mineral powder, 1-2 parts of steel fiber, polyethylene 1-2 parts of glycol, 20-30 parts of polyhydroxyacid water-reducing 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 caustic soda, organic silicon 5-10 parts of monomer, 3-5 parts of oxidizing agent, 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 the PAM is moistened with methanol or ethanol. Deionized water is added for stirring, and the mixture is heated to 55 degrees Celsius during stirring to prepare a solution with a concentration of 4%. Preferably, the oxidizing agent 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, polyhydroxy acid water reducing agent and polyethylene glycol Mix in the reaction kettle;
S2: Oxidation: Stir until the mixture in step S1 is evenly mixed, and add oxidant for oxidation;
S3: Reduction: Add fly ash to the oxidized mixture in step S2. , mineral powder and steel fiber, and then add the reducing agent;
S4: Neutralization: Add the tackifier and coagulant to the reduced mixture in step S3, stir continuously until the mixture is uniform, and then add the liquid The anti-segregation agent for concrete can be obtained by adjusting the pH with alkali so that the pH is between 7 and 9.
Compared with the existing technology, the beneficial effects of the present invention are: the invention adds fly ash, mineral powder and steel fiber to the anti-segregation agent, which can not only improve the compressive strength of concrete, but also It can effectively improve the working performance and stratification degree of concrete, improve the segregation resistance of concrete, and also reduce the expansion and slump of concrete. PAM is used as the tackifier, because PAM has more -NH2, which makes the viscosity increase The agent has good hydrophilicity, making the concrete hydrophilic, water-retaining, thickening, resistance-reducing and viscosity-increasing. Adding calcium sulfate as a coagulant can promote concrete water splashing, accelerate hardening, and promote condensation. Source of raw materials for this invention Wide, low cost, green and environmentally friendly, simple to operate.
Detailed Embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Some embodiments of the present invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
Please refer to Figure 1. The present invention provides a technical solution: an anti-segregation agent for concrete. The composition of the anti-segregation agent for concrete is as follows:
5-15 parts of fly ash, mineral powder 5-15 parts, steel fiber 1-2 parts, polyethylene glycol 1-2 parts, polyhydroxyacid water-reducing agent 20-30 parts, tackifier 0.8-1.2 parts, coagulant 0.5-0.9 parts, deionization 200-300 parts of water, some parts of liquid alkali, 5-10 parts of silicone monomers, 3-5 parts of oxidizing agent, and 1-3 parts of reducing agent.
Example 1
The preparation method of the concrete anti-segregation agent includes the following steps:
S1: Mixing: 5.5 parts of organosilicon monomer, 288 parts of deionized water, polyhydroxy acid and Add 29 parts of aqueous agent and 1.1 parts of polyethylene glycol into the reaction kettle for mixing;
S2: Oxidation: Stir to make the mixture in step S1 evenly mixed, add 3.3 parts of oxidant for oxidation;
S3: Reduction: Add 13.9 parts of fly ash, 5.9 parts of mineral powder and 1.1 parts of steel fiber to the oxidation mixture in step S2, and then add 1.1 parts of reducing agent;
S4: Neutralization: after the reduction in step S3 Add 1.16 parts of tackifier and 0.58 parts of coagulant to the mixture, stir continuously until evenly stirred, then add liquid caustic soda to adjust the pH so that the pH is between 7-9, and you can obtain the anti-segregation agent for concrete.
Example 2
The preparation method of the concrete anti-segregation agent includes the following steps:
S1: Mixing: 14.8 parts of organosilicon monomer, 215 parts of deionized water, polyhydroxy acid and Add 21.5 parts of aqueous agent and 2 parts of polyethylene glycol into the reaction kettle for mixing;
S2: Oxidation: Stir to make the mixture in step S1 evenly mixed, add 4.7 parts of oxidant for oxidation;
S3: Reduction: Add 6.4 parts of fly ash, 14.6 parts of mineral powder and 1.8 parts of steel fiber to the oxidation mixture in step S2, and then add 2.9 parts of reducing agent;
S4: Neutralization: after the reduction in step S3 Add 0.85 parts of tackifier and 0.85 parts of coagulant to the mixture, stir continuously until evenly stirred, then add liquid caustic soda to adjust the pH so that the pH is between 7-9, and then you can obtain the anti-segregation agent for concrete.
Example 3
The preparation method of the concrete anti-segregation agent includes the following steps:
S1: Mixing: 7.5 parts of organosilicon monomer, 250 parts of deionized water, and polyhydroxy acid water-reducing Add 25 parts of agent and 1.5 parts of polyethylene glycol into the reaction kettle and mix;
S2: Oxidation: Stir to make the mixture in step S1 evenly mixed, add 4 parts of oxidant for oxidation;
S3: Reduction : Add 10 parts of fly ash, 10 parts of mineral powder and 1.5 parts of steel fiber to the oxidation mixture in step S2, and then add 2 parts of reducing agent;
S4: Neutralization: After reduction in step S3 in the mixtureAdd 1 part of tackifier and 0.75 part of coagulant, stir continuously until evenly stirred, then add liquid caustic soda to adjust the pH so that the pH is between 7-9, and you can obtain the anti-segregation agent for concrete.
Based on the above, the best embodiment of the preparation method of the anti-segregation agent for concrete is:
The preparation method of the anti-segregation agent for concrete includes the following steps:
S1: Mix: Add 7.5 parts of silicone monomer, 250 parts of deionized water, 25 parts of polyhydroxyacid water-reducing agent and 1.5 parts of polyethylene glycol into the reactor and mix;
微信扫一扫打赏
