- 目录
- 化学建材
- 首页
不同结构聚羧酸减水剂对α-高强石膏性能的影响
作者：王响1，张鹏2，吴鹏1，张磊1，顾忠良1
（1.芜湖弘马新材料有限公司，安徽 芜湖 241000；2.芜湖海螺型材科技股份有限公司，安徽 芜湖 241000）
摘要：通过分子设计，采用不同合成单体制备了不同酸醚比、不同侧链长度、不同侧链类型的聚羧酸高性能减水剂，并研究了不同分子结构对α型高强石膏减水率、凝结硬化时间、2 h抗折强度及绝干抗压强度的影响。结果表明：减水剂的减水率随酸醚比的减小先增大后减小，随侧链长度的增大先增大后减小；石膏凝结时间随酸醚比的增大而延长，随侧链长度的缩短而延长；减水率越高，越接近于理论需水量，石膏的凝结时间越短、2 h抗折强度和绝干抗压强度越高。
关键词：聚羧酸减水剂；分子设计；合成；α型高强石膏
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2019）12-0073-03
Effect of polycarboxylate superplasticizer with different molecular structures on the properties of α-type high-strength gypsum
WANG Xiang1，ZHANG Peng2，WU Peng1，ZHANG Lei1，GU Zhongliang1
（1.Wuhu Hongma New Material Co. Ltd.，Wuhu 241000，China；2.Wuhu Conch Profiles and Science Co. Ltd.，Wuhu 241000，China）
Abstract：In this paper，polycarboxylate superplasticizer with different acid to ether ratio，different side chain length and different side chain type was prepared by molecular design，and the influence of different molecular structures on the water reducing efficiency，setting time，2 h flexural strength and dry compressive strength of α-type high-strength gypsum were investigated in detail. The results show that the water reducing ratio first increased and then decreased with the increase of acid ether ratio，while first increased and then decreased with the increase of the length of the side chain；the setting time prolonged with the increase of the ratio of acid ether，and extended with decreasing the length of side chain；The higher the decrease water rate，the more close to the theoretical requirement，the shorter the setting time，the higher the 2 h flexural strength and dry compressive strength.
Key words：polycarboxylate superplasticizer，molecular design，synthesis，α-type high-strength gypsum