摘要
论述了在无掺合料高强超高强高性能混凝土的试验结果与分析的基础上,论述了有掺合料高强超高强高性能混凝土的试验结果与分析,得出了各掺合料的活性指数,引入水化活性因子和减水剂增量系数进行高强超高强高性能混凝土配合比的修正为超高强高性能混凝土配合比的设计提供了一种实用的方法。
The deformations of cement pastes and mortars with or without UEA and light calined magnesia expansive agent were studied. Cement pastes and mortars were pre-cured for different time and then cured in two relative humidities.The influences of two kinds of expan- sive agents with replacement percentages of 0 and 6% on the drying shrinkage of cement pastes and mortars were compared and analyzed.The experimental results show that two kinds of expansive agents produced effective expansion in the dry air curing conditions, had an excellent ability to compensate for drying shrinkage of cement pastes and mortars.UEA hydrated faster and the expansion of it occurred before 14 d compared with light calined magnesia expansive agent.The time ofpre-curing in water had clear implication on UEA＇s expansion.
出处
《混凝土》
CAS
CSCD
北大核心
2013年第9期56-59,共4页
Concrete
基金
"十二五"国家科技支撑计划项目(2011BAE27B01)
国家重点基础研究发展计划(973计划)资助项目(2010CB735801)
长江学者和创新团队发展计划"无机非金属材料及应用"项目(IRT1146)
关键词
氧化镁膨胀剂
钙矾石
干燥收缩
相对湿度
MgO-based expansive agent
ettringite
drying shrinkage
relative humidity
