Slump-loss-resistant type polycarboxylate high-performance water reducing agent and preparation method thereof

Abstract

The invention discloses a slump-loss-resistant type polycarboxylate high-performance water reducing agent and a preparation method thereof. The slump-loss-resistant type polycarboxylate high-performance water reducing agent comprises, by weight, 1000-1500 parts of polycarboxylate solution, 800-1300 parts of mono unsaturated carboxylate and derivatives thereof, 1000-1500 parts of calcium chloride, 50-100 parts of initiator, 50-80 parts of molecular weight regulator and 4000-5000 parts of water. The polycarboxylate solution comprises, by weight, 1000-1400 parts of fatty alcohol polyoxyethylene ether, 300-450 parts of acrylic acid, 25-30 parts of hydrogen peroxide, 50-65 parts of catalyst and 500-1000 parts of water. The mono unsaturated carboxylate and derivatives comprise, by weight, 100-250 parts of acrylic acid, 50-150 parts of methylacrylic acid, 50-80 parts of sodium chloride, 50-80 parts of calcium chloride solution and 100-150 parts of ammonium sulfate.

Description

technical field [0001] The invention relates to a cement additive, in particular to a slump-retaining polycarboxylate high-performance water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer is the third generation of high-performance water reducer that has developed rapidly in recent years. Because of its superior dispersion performance and controllable performance, it has been highly praised by manufacturing enterprises and users. However, there are still some problems in the production and application of polycarboxylic acid, which affect its development. For example, its main raw material comes from the downstream products of petroleum refining, the supply is increasingly tight, and the price fluctuates greatly. In the use of high-strength concrete, there will be phenomena such as concrete stickiness and bottoming. These problems have aroused the attention and attention of the majority of users and pro...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the production and application of polycarboxylic acid at present, which affect its development. For example, its main raw material comes from the downstream products of petroleum refining, the supply is becoming increasingly tight, and the price fluctuates greatly.