Experimental study on creep property of recycled aggregate concrete

被引：0
|
作者：
Luo S. [1 ,2 ]
Huang H. [1 ]
Zheng J. [2 ,3 ]
机构：
[1] College of Civil Engineering, Fuzhou University, Fuzhou
[2] Environmental Protection Energy-Saving Collaborative Innovation Center of High-Performance Concrete in Fujian Province, Fuzhou
[3] School of Engineering, Fujian Jiangxia University, Fuzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2016年 / 37卷
关键词：
Creep property; Creep test; Preparation method; Recycled aggregate concrete; Recycled coarse aggregate;
D O I：
10.14006/j.jzjgxb.2016.S2.017
中图分类号：
学科分类号：
摘要：
Recycled coarse aggregate(RCA) was produced by waste concrete, and then used to replace natural aggregate with different replacement rates. The influences of different preparation methods, replacement rate of RCA and proportion of fly ash on creep performance of recycled aggregate concrete(RAC) were investigated. The test results indicate that the total specific creep of RAC with 50%, 70% and 100% replacement rates of the RCA increase by 18.5%, 47.7% and 52.7% respectively after loading 150 d, compared to that of normal concrete (NC). Three preparation methods (i.e. pre-wet, steep liquor wrapped stone craft and incorporation of silica fume steep liquor wrapped stone craft) have obvious effects on the decrease of the creep of RAC, which can reduce the creep deformation of RAC by 10%-25% after loading 150 d. The creep of recycled aggregate concrete can be improved effectively by adding proper amount of fly ash. Compared with the recycled concrete mixed without fly ash, the total specific creep of concrete specimens is the smallest and reduced by 14.6% when the fly ash proportion is 40% after loading 360 d. © 2016, Editorial Office of Journal of Building Structures. All right reserved.
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页码：115 / 120
页数：5
相关论文
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