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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 918294, 5 pages
http://dx.doi.org/10.1155/2013/918294
Research Article

Effect of Ground Waste Concrete Powder on Cement Properties

1Department of Civil and Material Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
2College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

Received 20 March 2013; Revised 1 May 2013; Accepted 13 May 2013

Academic Editor: Alex Li

Copyright © 2013 Xianwei Ma and Zhenyu Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The paste/mortar attached to the recycled aggregate decreases the quality of the aggregate and needs to be stripped. The stripped paste/mortar is roughly 20% to 50% in waste concrete, but relevant research is very limited. In this paper, the effects of ground waste concrete (GWC) powder, coming from the attached paste/mortar, on water demand for normal consistency, setting time, fluidity, and compressive strength of cement were analyzed. The results show that the 20% of GWC powder (by the mass of binder) has little effect on the above properties and can prepare C20 concrete; when the sand made by waste red clay brick (WRB) replaces 20% of river sand, the strength of the concrete is increased by 17% compared with that without WRB sand.