试验条件对引气混凝土性能的影响研究

Influence of experiment condition on air entrained concrete

正确表征混凝土含气量,发挥引气剂掺量的最大功效,一直是引气剂使用过程中需要解决的问题。本文通过配合比设计方法、含气量测定法及振捣时间对混凝土引气效果及含气量的影响研究,指出在混凝土配合比设计时采用假定容重法可获得良好的引气效果和工作性,及气压式测定法测得的含气量更接近于硬化混凝土的含气量和振捣时间选择的原则。

What we indicate air content of concrete and exert maximum efficacy of air-entraining agent parameter is always a question to need in using air-entraining agent. This paper will explain available and stable air entrained result of assumed density in mix proportion design of concrete and performance of concrete mixture. The experiment also prove that the air content of fresh concrete that are measured through air pressure mode is more contiguous to the air content of harden concrete, and the principli of selection on vibration time.