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首页> 外文会议>Geotechnical frontiers >Characterization of the Geo-Environmental Properties of Untreated or Cement Treated Recycled Base Materials in Pavement Base Layer Applications
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Characterization of the Geo-Environmental Properties of Untreated or Cement Treated Recycled Base Materials in Pavement Base Layer Applications

机译：路面基础层应用中未处理或水泥处理的再生基础材料的地球环境特性表征

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The use of Recycled flex-base materials such as recycled crushed concrete aggregate (RCCA) and reclaimed asphalt pavement (RAP) are increasing considerably nowadays in pavement base layer applications. Increased use of these materials address the issues of depletion of natural resources and provide solution to the adverse effect on environment. The recycled materials utilized in this study was collected from the Texas Department of Transportation (TxDOT) approved sources. The properties of recycled base materials depend solely on the sources and their environmental aspects of using as base material needs to be analyzed. A comprehensive laboratory evaluation of geo-environmental properties of RCCA and RAP in untreated or cement treated condition were conducted in this study. The amount of RAP and RCCA varied from 0%-100% in the combination at 50% interval with cement content varying from 0% to 6% at 2% interval. The specimens were prepared at optimum moisture content and maximum dry density obtained from the test results. The geo-environmental tests included permeability and leaching tests. Leaching tests included pH, total and volatile dissolved solids, total and volatile suspended solids, turbidity and chemical oxygen demand (COD). Tests results were compared with the requirements of different environmental protection agencies. The comparison of tests results indicated that the recycled base materials were environmentally sound alternative to regular virgin aggregates and can be used in pavement base or sub-base layer.
机译：如今，在路面基础层应用中，可再生的挠性基材料（例如再生的碎混凝土骨料（RCCA）和再生的沥青路面（RAP））的使用正在显着增加。越来越多地使用这些材料解决了自然资源枯竭的问题，并解决了对环境的不利影响。本研究中使用的回收材料是从德克萨斯州交通运输部（TxDOT）批准的来源收集的。再生基础材料的性能仅取决于来源，需要分析其用作基础材料的环境方面。在这项研究中，对未处理或水泥处理过的RCCA和RAP的地球环境特性进行了全面的实验室评估。 RAP和RCCA的用量在50％间隔的组合中从0％-100％不等，而水泥含量在2％间隔的范围从0％到6％不等。从测试结果获得的最佳水分含量和最大干密度下制备样品。地质环境测试包括渗透性和浸出测试。浸出测试包括pH值，总和挥发性溶解固体，总和挥发性悬浮固体，浊度和化学需氧量（COD）。将测试结果与不同环保机构的要求进行了比较。测试结果的比较表明，再生的基础材料在环境上是常规纯骨料的替代品，可用于路面基础层或次基础层。

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