摘要
研究了石灰石粉取代部分水泥和细集料后,混凝土各项性能的变化。调查了不同细度石灰石粉对混凝土性能影响的差异。结果表明:混凝土中掺入石灰石粉后,工作性能出现了一定的变化。混凝土坍落度随掺入石灰石粉细度的减小而增大;混凝土的孔隙率和干燥收缩随掺入石灰石粉细度的减小而减小,当石灰石粉的细度小于4.6%时,石灰石粉混凝土的孔隙率和干燥收缩均要小于不掺石灰石粉的混凝土;石灰石粉细度对混凝土强度的影响差别不大。
The paper studied the performance of concrete with the limestone replaces the cement and fine aggregate, and investigated the difference of limestone with various fineness. The results showed that workability of concrete changed with the limestone added. The slump increased with the fineness decreased. The porosity and dry shrinkage of concrete decreases when the fineness reduced. When the fineness of limestone was less than 4.6%, the porosity and dry shrinkage of concrete was less than the one without limestone. The effect of the fineness on strength was not obvious.
出处
《粉煤灰》
2009年第2期13-15,共3页
Coal Ash China
关键词
石灰石粉
细度
混凝土
Limestone Powder, Fineness. Concrete