粉煤灰对混凝土收缩性能的影响与控制研究

A Effect and Control Study of Fly Ash to theShrinkage Performance of Concrete

本文着重研究了粉煤灰对混凝土的收缩性能的影响。试验结果表明:掺粉煤灰混凝土的早期收缩略有增加,而28d龄期的收缩就已小于基准混凝土。粉煤灰以超量方式掺入对混凝土的后期收缩抑制作用更加明显。

This paper mainly studied the effect of fly ash to the shrinkage performance of concrete. Experimental results indicate that the early -age shrinkage of concrete mixed with fly ash shows slightly increase, while the shrinkage with 28d age is less than datum concrete, and with over - substitution method, the suppression effect of fly ash to the later period shrinkage of concrete is more obvious.