Based on this, the influence of water to cement ratio, fly ash and silica fume on porosity of concrete are studied.
本文采用该方法研究了水灰比、粉煤灰、硅灰等对混凝土孔隙率的影响。
2
Traditionally, the civil worker has paid more attentions on the cement, the waterratio as well as the admixture such as the fly ash and the silicon ash.
以往的研究,土木工作者把更多的注意力放在了水泥、水灰比、外加剂以及粉煤灰和硅灰等外掺材料中。
3
Effects of quality index, which are volcanic ash activity, loss on ignition, fineness and water demand ratio, on quality of fly ash are expatiated, the requests to quality of fly ash are put forward.