摘要
聚羧酸减水剂是现代混凝土实现高性能化的关键,但原材料与环境敏感性问题一直阻碍着聚羧酸减水剂的深入推广。试验对比研究了不同调控技术对含泥量变化下掺聚羧酸减水剂混凝土常温与高温工作性能的影响,并测试了混凝土力学性能的发展。结果表明:适当提升掺量并采用"快速分散、缓慢释放"及"分子剪裁"技术,对聚羧酸减水剂分子结构进行设计,可解决因含泥量波动及高温引起的混凝土初始工作性能不佳与坍落度经时损失问题,且混凝土力学性能发展不受影响。
Polycarboxylate superplasticizer is the key for modern concrete to achieve high properties.But the sensitivity of polycarboxylate to environment and raw materials hinders the promotion of new superplasticizer.The effects of regulating technology on workability of polycarboxylate superplasticizer concrete with different clay content at normal and high temperatures were investigated respectively.The mechanical property of concrete was also been tested.The results show that the poor initial workability and slump loss problems of polycarboxylate superplasticizer concrete caused by clay content fluctuations and high temperature could be solved by appropriatly increasing the dosage of superplasticizer and designing the molecular structure of the polycarboxylate using ＂quick disperse,slow release ＂and＂ molecular tailoring technology＂.The measures taken above would not affect the mechanical property development of concrete.
出处
《江苏建筑》
2013年第1期114-116,共3页
Jiangsu Construction
基金
国家科技支撑计划(十二五)资助(2011BAE27B02)
江苏省交通科学研究计划项目"灌河大桥腐蚀环境下耐久性应用研究"资助
关键词
聚羧酸减水剂
工作性能
分子结构
力学性能
polycarboxylate superplasticizer
workability
molecular structure
mechanical property
