摘要
本文结合青藏铁路环境特征,研究了粉煤灰、硅灰对预应力轨枕用蒸养混凝土的抗压强度和抗冻性能的影响。试验研究结果表明,粉煤灰掺量小于30%或硅灰小于5%时,单掺或双掺取代水泥配制的蒸养混凝土,其抗压强度和抗冻性能均能满足青藏线预应力轨枕要求。
In this paper,according to the situation of QinghaiTibet railway,the influence of fly ash and silica fume on compressive strength and freezethaw resistance of steam curing concrete was studied.The experimental result showed that when the replacement of cement by fly ash was less than 30% and by silica fume 5%,the freezethaw resistance and compressive strength of steam curing concrete met with the requirement of prestressed sleeper used in QinghaiTiber railway.
出处
《混凝土》
CAS
CSCD
2003年第3期32-34,51,共4页
Concrete
基金
国家自然科学基金资助项目(50178014)
铁道部科技发展计划项目(2001G005)
关键词
试验
蒸养
混凝土
抗冻性
粉煤灰
硅灰
抗压强度
预应力
轨枕
steam curing concrete
freeze-thaw resistance
fly ash
silica fume
compressive strength
