The volume of Construction and Demolition Wastes is dramatically increasing around the world, mainly in urban areas, giving rise to environmental damage. In Tehran, producing 50,000 tons of the construction and demolition wastes (CDW) has made the lack of suitable sites for the disposal. This study aims were to evaluate the physical and mechanical properties of the CDW to possibly use in road construction, specifically as sub-base materials. To do so, after crushing the selected material from the disposal, a few important physical tests, including soil grading, Atterberg limits, modified compaction, California Bearing Ratio, and direct shear test were carried out to assess the obtained values with those exerted by standards in road construction. Furthermore, a series of cyclic plate load tests have been carried out to evaluate the effectiveness of geocell reinforcement on the bearing capacity of CDW materials. The results showed that the physical and mechanical properties of the studied CDW materials agreed with the majority of the standard criteria to be used as sub-base materials in road construction. The results of plate load tests revealed that cyclic bearing capacity of CDW backfills was 20–40% lower than that of standard material. However, geocell reinforcement could not only improve the CDW cyclic response approaching to natural aggregate (NA) response, but also boost bearing capacity ratio well above than one for all CDW materials.

在世界范围内，主要是在城市地区，建筑和拆除废物的数量正在急剧增加，从而造成了环境破坏。在德黑兰，由于产生了5万吨建筑废料和拆迁废物，因此缺乏合适的处置场所。这项研究的目的是评估CDW的物理和机械性能，以用于道路建设，特别是用作基础材料。为此，在从处置场中粉碎选定的材料后，进行了一些重要的物理测试，包括土壤平整度，阿特伯格极限，改良压实度，加利福尼亚承载比和直接剪切试验，以利用标准施加的值评估获得的值在道路建设中。此外，已经进行了一系列的循环板载荷试验，以评估土工格室加固对CDW材料承载能力的有效性。结果表明，所研究的CDW材料的物理和机械性能符合大多数标准标准，这些标准可用作道路施工中的基础材料。板载荷测试的结果表明，CDW回填的循环承载力比标准材料低20–40％。但是，土工格室的加固不仅可以改善CDW循环响应，逼近自然骨料（NA）响应，而且可以将承载力比提高到所有CDW材料的1以上。结果表明，所研究的CDW材料的物理和机械性能符合大多数标准标准，这些标准可用作道路施工中的基础材料。板载荷测试的结果表明，CDW回填的循环承载力比标准材料低20–40％。但是，土工格室的加固不仅可以改善CDW循环响应，逼近自然骨料（NA）响应，而且可以将承载力比提高到所有CDW材料的1以上。结果表明，所研究的CDW材料的物理和机械性能符合大多数标准标准，这些标准可用作道路施工中的基础材料。板载荷测试的结果表明，CDW回填的循环承载力比标准材料低20–40％。但是，土工格室的加固不仅可以改善CDW循环响应，逼近自然骨料（NA）响应，而且还可以将承载力比提高到所有CDW材料的1以上。