Abstract
The rapid increase in waste generation from construction & demolition (C&D) projects is emerging as a serious concern for solid waste management in urban regions. Sustainable development encourages the usefulness of recycled C&D waste as a replacement of natural materials. Re-utilization of construction & demolition (C&D) waste is more widespread in civil engineering construction projects. Although some studies claim the geotechnical applicability of C&D waste as road pavement sub-base/base material, the fine-grained portion of C&D waste is regarded unsuitable for pavement works. This study investigated the use of C&D waste as fill material for road embankments. The applicability of C&D waste aggregates in embankment fills is examined by reviewing the available literature related to their geotechnical & geo-environmental investigations. The focus of this study is on the C&D waste types like - reclaimed asphalt pavement (RAP), waste rock (WR), recycled concrete aggregates (RCA), recycled glass (RG), crushed brick (CB), etc. Most of the studies reported the geotechnical characterization & geo-environmental assessment of waste aggregates, including particle size distribution, California bearing ratio, water absorption, modified Proctor compaction, specific gravity, Los Angeles abrasion, direct shear, pH, organic content, and leachate testing, etc. According to the literature survey, majority of C&D wastes meet the standard specifications for materials utilized for pavement sub-base/base and embankment backfill.
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