A kind of highly adaptable polycarboxylate water reducer and its synthesis method

Abstract

The invention discloses a highly adaptable polycarboxylate water-reducer and a method for synthesizing the water-reducer. Polyethylene glycol, a polymerization inhibitor, and acrylic acid are put into a reaction container in sequence for full stirring, and a catalyst is added into the container. Then react under heating conditions to generate polyester functional monomers; under normal temperature and pressure, use water as solvent, carry out ethylene glycol monovinyl ether, acrylic acid and composite initiators with the prepared polyester functional monomers Polymerization reaction to obtain polycarboxylate water reducer. The water reducer of the invention has simple structure, excellent performance, strong adaptability and is suitable for industrial promotion.

Description

technical field [0001] The invention relates to the technical field of polycarboxylate concrete water reducer, and more specifically relates to a highly adaptable polycarboxylate water reducer and a synthesis method thereof. Background technique [0002] Polycarboxylate high-performance water-reducer, as the third-generation water-reducer, has the advantages of high water-reducing rate, good slump retention performance, designable molecular structure, and environmental protection, and has been widely used in actual engineering. Polycarboxylate superplasticizers are easily affected by concrete raw materials, especially aggregate sand, on the performance of concrete during use. [0003] At present, my country's high-quality river sand raw materials are over-exploited, and resources are exhausted. More and more projects use artificial sand and machine-made sand. The content of mud or stone powder in these inferior sands is high, which not only affects the performance of freshly...

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Problems solved by technology

[0003] At present, my country's high-quality river sand raw materials are over-exploited, and resources are exhausted. More and more projects use artificial sand and machine-made sand. The content of mud or stone powder in these inferior sands is high, which not only affects the performance of freshly mixed concrete, but also may cause concrete damage. Bleeding, rapid loss of fluidity over time, and poor adaptability to polycarboxylate superplasticizers are usually solved by overmixing or compounding polyether-type polycarboxylate superplasticizers, but it will cause concrete Increased production costs, and polyether polycarboxylate superplasticizers on the market have different sensitivity to different brands of cement

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