A water-reducing agent with high cement compatibility

Abstract

The invention discloses a water reducing agent with high cement compatibility, which comprises component A and component B, and the raw materials of component A are: isopentenol polyoxyethylene ether, reducing agent, acrylic acid, hydroxyethyl methacrylate, Chain transfer agent, polyethylene glycol diacrylate, oxidizing agent and water; the preparation method of component B is: (1) ball mill the mixed powder of calcium aluminum silicate and calcium sulfate, and sieve; (2) configure sodium borate, phosphoric acid Sodium aqueous solution, heat the sieved powder to 1200-1250°C, keep it warm for 1-2h, then immerse it in the solution and water-cool it to room temperature, take it out after cooling, repeat the heating and keeping warm, soaking process twice; finally solid-phase washing, drying, Obtain solid phase A; (3) configure the aqueous solution of maleic acid and N,N-dimethylformamide in the container, soak solid phase A wherein, heat, keep warm, air-cool, filter, wash, dry, obtain Component B. The invention improves the compatibility between the concrete and the water reducing agent, reduces the hydration speed, improves the fluidity, and has very good use effect.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a water-reducing agent with high cement compatibility. Background technique [0002] High-performance concrete has excellent characteristics such as high fluidity, high durability and high strength. The addition of high-performance water reducer and mineral admixture is the most important technical way to achieve high performance of concrete. However, the poor compatibility of high-performance water-reducing admixture with cement leads to excessive loss of fluidity and slump of high-performance concrete, which seriously affects the production and application of high-performance concrete. High-performance water reducers have poor compatibility with cement, which is related to the chemical composition and properties of cement. For example, when the mud content of the concrete aggregate is too high, the dispersion performance of the water-reducing agent will be greatly ...

AI Technical Summary

Problems solved by technology

For example, when the mud content of the concrete aggregate is too high, the dispersion performance of the water reducing agent will be greatly reduced or even completely ineffective. Practice has found that simply relying on the improvement or improvement of the preparation process of the water reducing agent cannot completely solve the problems of poor concrete workability and rapid collapse.

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