Performance evaluation of construction and demolition waste aggregates as an alternative base course material in highway construction

IF 3 Q2 ENGINEERING, CIVIL
Ishfaq Rashid Sheikh, M. Y. Shah
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引用次数: 6

Abstract

ABSTRACT Construction and demolition (C&D) wastes are found to be the main source of unwanted materials produced worldwide. Due to the insufficient amount of high-quality fresh limestone aggregates, construction and demolition waste are used as an alternative base course material for highway construction. The stabilization of C&D recycled aggregate waste with ordinary portland cement (OPC) has been repeatedly used by the researchers to improve the performance of the base course in highway construction. The studies related to the geosynthetic-reinforced C&D waste are limited. In this study, the efficacy of geosynthetics reinforced bases was evaluated within the base course with three different base thickness (120, 150 and 200 mm). Two different infill materials, namely, C&D waste and limestone aggregates were used and plate load tests were conducted to simulate traffic loading over geosynthetic reinforced and unreinforced unpaved test sections. This study aims to present the results in terms of load versus deformation and load versus vertical stress distribution. It was observed that the C&D waste improvement factor is more than virgin aggregates (limestone aggregates). Due to the inclusion of geocell and geotextile, the average bearing capacity improvement factor enhances by 62% and the vertical stresses decrease significantly.
建筑垃圾集料在公路建设中替代基层材料的性能评价
建筑和拆除(C&D)废物被发现是世界范围内产生有害物质的主要来源。由于高质量的新鲜石灰石骨料数量不足,建筑和拆除垃圾被用作公路建设的替代基层材料。普通硅酸盐水泥(OPC)稳定C&D再生骨料废料已被研究人员多次应用于公路建设中,以改善基层的性能。关于土工合成材料增强的C&D废弃物的研究是有限的。在本研究中,土工合成材料增强基础的效果评估在基层三种不同的基层厚度(120,150和200毫米)。采用了两种不同的填土材料,即土木工程废物和石灰石骨料,并进行了板载试验,以模拟土工合成材料加筋和未加筋的未铺设试验段的交通荷载。本研究的目的是在荷载与变形和荷载与垂直应力分布方面提出结果。研究发现,C&D废弃物的改善因子大于原生骨料(石灰石骨料)。由于土工格室和土工布的加入,平均承载力提高系数提高了62%,竖向应力显著降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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