A kind of preparation method of barrier intercalation anti-mud type polycarboxylate water reducer

Abstract

The invention provides a preparation method of a barrier intercalation anti-mud type polycarboxylate water reducer. The method comprises the following steps: (1) adding a polyether macromonomer, a hydroxyl functional monomer, a phosphate functional monomer and water into a reaction kettle according to a certain proportion, stirring and heating until the materials are dissolved; (2) controlling thetemperature to be 55-60 DEG C, and starting to add a certain amount of a penetrant and a chain transfer agent; (3) after the addition of the penetrant and the chain transfer agent is finished for 5 minutes, starting to dropwise add a solution A and a solution B at the same time, starting to dropwise add a solution C within 10 minutes after the start of the dropwise addition of the solution A andthe solution B, wherein the dropwise addition time of the solution C is a hours, the dropwise addition time of the solution A and the solution B is a+0.5 hours, the solution A is prepared from an initiator, alcohol organic solvents and water, the solution B is prepared from hydrogen peroxide and water, and the solution C is prepared from carboxylate, acrylic acid and water; (4) after the end of the dropwise addition, heating up to 70-75 DEG C, maintaining the temperature to be constant, curing for b hours, adding a neutralizing agent when the temperature of the reaction solution is lower than30 DEG C, and replenishing water to obtain the barrier intercalation anti-mud type polycarboxylate water reducer.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to the field of concrete admixtures, in particular to a method for preparing a barrier intercalation and anti-mud type polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the continuous advancement of engineering construction, the amount of high-performance concrete is increasing, resulting in the decreasing quality of sand and gravel resources. At the same time, there are many cross-regional and cross-regional engineering projects, and the raw materials of sand and gravel are obtained locally, and the quality varies widely. Generally speaking, the mud content of sand and gravel materials tends to increase. Polycarboxylate superplasticizers have problems such as large water consumption, poor adaptability, rapid slump loss, and reduced strength for sand and gravel materials with high mud content, resulting in reduced work perfor...

AI Technical Summary

Problems solved by technology

Polycarboxylate superplasticizers have problems such as large water consumption, poor adaptability, rapid slump loss, and reduced strength for sand and gravel materials with high mud content, resulting in reduced work performance and concrete performance.

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