Workability and mechanical property of low grade pumping concrete modified by recycled coarse aggregate

6th Annual International Conference on Material Science and Engineering

Du, Xiuhong^1 ; Tao, Wenhong^1 ; Fu, Xinghua^1,2 ; Liu, Mingle^2

School of Materials Science and Engineering, University of Jinan, Shandong, China^1

GCBM, Technology Center, Shenzhen Gangchuang Building Material CO, LTD, Shenzhen, China^2

关键词: Coarse aggregates;    Construction wastes;    Pumping concretes;    Recycled aggregate concrete;    Recycled aggregates;    Recycled coarse aggregate;    Research and application;    Water consumption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012072/pdf
DOI  :  10.1088/1757-899X/397/1/012072

来源: IOP

【 摘 要 】

In recent years, the construction industry has entered a stage of rapid development in Chinawith more and more construction waste, which has a great negative impact on natural resources and environment. These building wastes can be processed into recycled aggregate by sorting, crushing and processing. This kind of technology can realize the recycling of construction waste [1]. In order to promote the research and application of recycled aggregate concrete, this paper probes into the effect of recycled coarse aggregate (RCA) on the performance of pump concrete. By using the orthogonal test to studied the impact of the amount of fly ash, replacement of RCA and change of sand rate on the mechanical properties of C30 recycled pump concrete (RPC). By adjusting water consumption to ensured RPC pump requirements. The pump concrete prepared by natural coarse aggregate (NCA) was treated as a control group, which was called natural pump concrete (NPC). The experimental results show that the best proportion of RPC, fly ash content, recycled aggregate content, sand rate respectively are 40wt%, 50wt% and 45wt%.