对西安市最主要的建筑垃圾分类加工厂进行调查取样，检测其所含有的重金属污染质，甄别潜在的污染来源。结果表明：尽管混凝土、砖块、瓷片中个别样品Cd、As、Cr、Zn的全量超出国家土壤三级标准，但实际使用中可能只有少量溶解态滤出，因此并不会对环境造成较大危害，将其大规模应用于公路工程中可行。

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.