Many researchers suggest using construction and demolition materials (C&D) in engineering applications rather than virgin aggregates (VA). However, the engineering properties of C&D tend to be poorer than those of VA. This study presents the results of plate loading tests performed on unpaved roads with C&D, reinforced by different types of geosynthetics on the soft subgrade. As part of these tests, the effects of some geosynthetic parameters such as (a) the embedment depth, (b) the height and pocket opening of the geocell, (c) the embedment depths and number of geogrids, (d) the distance between geogrids and (e) the stiffness of the geotextile on the bearing capacity of the unpaved road were investigated. Moreover, the same plate loading test was also conducted on an unpaved road built with VA. As a result of this study, although the performance of C&D was determined to be lower than that of VA, it was concluded that C&D performed well enough to be used as an alternative to VA on unpaved roads. Furthermore, with a very small number of geosynthetics, it was determined that C&D could have a better performance than VA.

中文翻译：

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土工合成材料增强建筑和拆除材料的研究

许多研究人员建议在工程应用中使用建筑和拆除材料 (C&D)，而不是原始骨料 (VA)。然而，C&D 的工程性能往往比 VA 差。本研究介绍了在采用 C&D 的未铺砌道路上进行的板加载试验的结果，并在软路基上使用不同类型的土工合成材料进行加固。作为这些测试的一部分，一些土工合成材料参数的影响，例如（a）嵌入深度，（b）土工格室的高度和口袋开口，（c）嵌入深度和土工格栅数量，（d）土工格栅之间的距离研究了土工格栅和（e）土工织物的刚度对未铺砌道路承载能力的影响。此外，还在用VA修建的未铺砌道路上进行了相同的板载试验。这项研究的结果是，虽然 C&D 的性能被确定为低于 VA，但得出的结论是 C&D 的性能足够好，可以在未铺砌的道路上用作 VA 的替代品。此外，由于土工合成材料的数量非常少，C&D 可以比 VA 具有更好的性能。