T/WHWX 012-2024 Polymerized carboxylic acid water reducing agent using polyether macromonomer

Scope

Main Technical Content: 1. Necessity. In recent years, China's infrastructure construction has continued to develop at a rapid pace, and polycarboxylate superplasticizers are an indispensable raw material for concrete in engineering construction. Polyether macromonomers are the main raw materials for polycarboxylate superplasticizers. With the continuous research and exploration of polycarboxylate superplasticizers by industry experts, the overall quality level of polycarboxylate superplasticizers has significantly improved, and higher technical requirements have been set for the polyether macromonomers used in polycarboxylate superplasticizers. Currently, some indicators in industry standards have a wide range, which cannot reflect the differentiated needs of association member enterprises for polyether macromonomers used in polycarboxylate superplasticizers. Therefore, in order to ensure the quality of engineering construction, improve the quality standards of polyether macromonomers used in polycarboxylate superplasticizers, and thus guarantee the quality of concrete superplasticizers, it is necessary to formulate stricter industry standards than current ones to guide and standardize the selection of raw materials by production enterprises in the association. This is mainly reflected in the following aspects: (1) Some technical indicators need to be improved. In the industry standard, the molecular weight of monomers is classified into three categories: below 800, 800-1500, and above 1500, with a wide range. According to the actual production and engineering application of association member enterprises, in order to ensure the stability of product quality, improve performance, and meet the needs of personalized engineering applications, a more refined classification of polyether macromonomers used in polycarboxylate superplasticizers is needed. (2) Some technical indicators of polyether macromonomers need to be supplemented. Polyether macromonomers are the

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