Organic Pretreatment of Recycled Aggregates of Rural Construction Waste

Abstract:

Through using acetic acid resin, asphalt and urea resin organic pretreatment methods to pretreat the surface of rural construction waste, and testing of crush index and water absorption rate of recycled coarse aggregate after pretreatment, the research for the influence of organic pretreatment technology on physical and mechanical performance of recycled coarse aggregate. The results prove that organic infiltrating pretreatment technology can effectively enhance the density of the coarse aggregate and decrease the crush of recycled coarse aggregate index, in a certain extent. The crush index of recycled coarse aggregates after organic pretreatment decreases at almost 17.63%, what’s more, organic pretreatment technology can decrease the water absorption rate of coarse aggregate by a large margin. The water absorption rate of coarse aggregate can be reduced to a minimum of 2.03% which closes to the level of natural aggregates. Because of urea resin solidified into film at fast speed, high integrity and high wear resistance, and relatively cheap, urea resin’s pretreatment effects on recycled coarse aggregates is better than acetic acid resin and asphalt.

• Periodical: Applied Mechanics and Materials (Volume 161)
• Pages: 1-5
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.161.1
• Online since: March 2012
• Authors: Jun Liu, Yao Li, Xu Ming Wang, Run Qing Liu
• Keywords: Discarded Clay Brick, Mechanical Performance, Physical Performance, Recycled Coarse Aggregate

References

[1] DENG Shouchang, ZHANG Xuebing, LUO Yingshe, Abandon the concrete present condition of the reborn exploitation analysis and the research outlook, J. Concrete, 2006 (11): 20-24.

[2] XING Zhenxian, WANG Xiaoying, ZHAO Yuqing, Optimum mix ratio selection of PFA regenaration concrete by orthogonal design, J. Low Temperature Architecture Technology, 2004(4): 1307-1312.

[3] Ilker B, Sdim S, Properties of concretes produced with waste concrete aggregate, J. Cement and Concrete Research, 2004(4):1307-1312.

DOI: 10.1016/j.cemconres.2003.12.019

[4] Tam VW, GaoX F, Tam CM, Micro structural analysis of recycled aggregate concrete produced from two stage mixing approach, J. Cement and Concrete Research, 2005, 35(6):1195-1203.

DOI: 10.1016/j.cemconres.2004.10.025

[5] SHI Jianguang, XU Yuezhou, Experiment research and analysis of aggregate gradation on the strength and workability of recycled concrete, J. Concrete, 2008(1):82-86.