Highly-adaptable polycarboxylic acid water reducer and synthesis method thereof

Abstract

The invention discloses a highly-adaptable polycarboxylic acid water reducer and a synthesis method thereof. The method comprises the following steps: sequentially adding polyethylene glycol, a polymerization inhibitor and acrylic acid into a reaction container, carrying out thorough stirring, adding a catalyst into a container, and carrying out a reaction under a heating condition to form a polyester functional monomer; and carrying out a polymerization reaction on ethylene glycol monovinyl ether, acrylic acid, a composite initiator and the obtained polyester functional monomer in water usedas a solvent at normal temperature under normal pressure to obtain the polycarboxylic acid water reducer. The water reducer has the advantages of simple structure, excellent performances, strong adaptability, and suitableness 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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