Slump prevention type efficient water reducer and production process thereof

Abstract

The invention provides a production process of a slump prevention type efficient water reducer. The production is characterized by comprising the following steps: S1: uniformly mixing water, diethyl ether, acrylic acid and hydrogen peroxide for reaction to obtain a solution S1; S2: adding the acrylic acid into the water for uniform mixing to obtain a material A, and adding mercaptoacetic acid intothe water for uniform mixing to obtain a material B; S3, dropwise adding the material A and the material B into the solution S1 for reaction to obtain a solution S3; S4: adding an alkaline solution into the solution S3 to adjust the PH to be 6 to 7, and continuously stirring the solutions for 15 to 25 minutes. The water reducer prepared by adopting the preparation method can effectively prolong the slump prevention time, and the water reducing rate of the water reducer can be further improved.

Description

technical field [0001] The invention relates to a water reducer and its production process, in particular to a slump-preserving high-efficiency water reducer and its production process. Background technique [0002] Both slump retaining agent and water reducing agent are commonly used materials in building materials. They are used to adjust the physical properties of concrete when added to concrete. Among them, slump retaining agent can slow down the setting time of concrete, and water reducing agent can reduce the moisture in concrete. The admixture that can greatly reduce the amount of mixing water under the condition that the concrete slump is basically the same is called a high-efficiency water reducer. At the earliest, there were only pure slump-retaining agents or water reducers / high-efficiency water reducers on the market. The pure slump-retaining agents have poor slump-retaining effects. The slump-retaining time is generally 1-1.5 hours. After this time, the concrete...

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Problems solved by technology

[0003] However, the existing products cannot well integrate the effects of slump retaining agent and water reducer, the slump retaining time is short, and the transportation distance is short. At the same time, the water reducing rate of traditional water reducer can only reach 27% at most. At the same time, the original product Bleeding is large, and the bleeding will cause the phenomenon of bottom grabbing (concrete is attached to the inside of the concrete tanker and cannot be poured out)

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