一类新型磷酸基超塑化剂的合成及性能研究  

Synthesis and Properties of a New Type of Phosphate BasedSuperplasticizer

作　　者：孙德文 亓帅 李波 刘畅 马英杰 周进俊 Sun Dewen;Qi Shuai;Li Bo

机构地区：[1]高性能土木工程材料国家重点实验室江苏苏博特新材料股份有限公司,江苏南京211103

出　　处：《江苏建材》2020年第4期10-13,27,共5页Jiangsu Building Materials

基　　金：国家重点研发计划资助项目(2017YFB0309904);国家自然科学基金联合基金项目(U170620242);江苏省自然科学青年基金(BK20170114)资助。

摘　　要：合成一类新型磷酸改性聚羧酸超塑化剂分子,这类聚合物特点是以聚丙烯酸和磷酸分别作为主链结构和吸附基团,其化学结构和分子量可以分别通过红外光谱和高效凝胶渗透色谱分析而确定。针对新合成减水剂的分散能力、吸附行为以及抗粘土性能进行了相关研究,结果发现磷酸改性聚羧酸减水剂不但能够提供优异的初始分散和分散保持能力,同时对含粘土骨料也具有良好的适应能力。In this paper,a new type of phosphated-polycarboxylate superplasticisers were synthesized.The new polymers were composed of polyacrylic acid and phosphate groups.Their chemical structures and molecular weights were determined by infrared spectrum and high-perform gel permeation chromatography,respectively.Their dispersion ability,adsorption behaviour and effect of resistance to clay were investigated.Results indicated that the phosphated-polycarboxylate water reducer exhibited better first dispersion and decentralization-retention-ability,meanwhile exerted the excellent and adaptability on aggregate with clay minerals.

关 键 词：磷酸基超塑化剂 流动性 分散性能 粘土 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]