两种不同状态再生细骨料混凝土工作性能的研究

Research on workability of concrete with two different states recycled fine aggregate

针对再生骨料表面多孔及高吸水率的特点以及使用再生骨料后混凝土坍落度损失大的问题,通过研究干燥状态再生细骨料和饱和面干再生细骨料与天然砂在再生混凝土中的掺量变化对再生混凝土的工作性和强度的影响。试验结果表明:将再生细骨料饱和面干化后,在保证混凝土强度的前提下,混凝土的工作性以及坍落度损失的问题也得到了较好的改善。

Aim at the problem of large slump loss of concrete by using the recycled aggregate with the properties of porous surface and high water absorption rate.This study focus on the influence of the workability and the strength of the concrete with different ratio of the recycled dried and saturated surface dried fine aggregate.The conclusion was the workability and the big slump loss can be improved by guaranteeing the strength with this method.