Environmental impact of construction waste used as recycled material in highway construction
ZHAO Xiaohong, WANG Wenke, CHEN Yuyun, YANG Shengke, WANG Zhoufeng, YANG Yinke
(School of Environmental Science and Engineering, Chang′an University, Xi′an 710064, Shaanxi, China)
Abstract:
Investigation and sampling were conducted in main plants of construction waste management of Xi′an city, and heavy metal concentrations of samples were determined to analyze and evaluate the potential environmental risk. The results showed that, compared with national standard of soil at third level, the whole concentrations of Cd, As, Cr and Zn in some bricks, concretes and ceramic chips are higher.In practice, only solvable part of heavy metal will possibly be leached which can′t induce environment risk. So， it is feasible that constructed waste is used in highway construction. not inducing environmental risk.
KeyWords:
construction waste; highway construction; heavy metal; environmental impact
