Abstract： By comparing the physical properties of recycled aggregates prepared from different strength grades of concretes, the influences of different replacement ratios of recycled aggregates on workability, mechanical property and permeability of fresh concretes were studied according to the practical proportion of engineering. The results show that the physical properties of recycled aggregates are worse than those of natural aggregates. The higher the strength of the native concretes is, the better the properties of the recycled aggregates are. There is a good coordination among a higher replacement ratio of the recycled aggregates and a smaller slump and poor liquidity of the fresh concretes, and the good water retention and adhesiveness can be obtained. The mechanical strength and permeability resistance of concretes with the recycled aggregates are higher than those of native concretes.

Keywords: recycled aggregate; concrete; workability; mechanical property; permeability

中图分类号：TU528          文献标志码：A

文章编号：1008-5548（2015）04-0085-04

DOI:10.13732/j.issn.1008-5548.2015.04.019

收稿日期：2015-01-09， 修回日期：2015-01-29，在线出版时间：2015-08-26。

第一作者简介：张名杰（1990—），男，硕士研究生,研究方向为先进土木工程材料。 E-mail:392233027@qq.com。