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。
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 ofα-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.
作者
王响
张鹏
吴鹏
张磊
顾忠良
WANG Xiang;ZHANG Peng;WU Peng;ZHANG Lei;GU Zhongliang(Wuhu Hongma New Material Co.Ltd.,Wuhu 241000,China;Wuhu Conch Profiles and Science Co.Ltd.,Wuhu 241000,China)
出处
《新型建筑材料》
北大核心
2019年第12期73-75,共3页
New Building Materials
关键词
聚羧酸减水剂
分子设计
合成
α型高强石膏
polycarboxylate superplasticizer
molecular design
synthesis
α-type high-strength gypsum
