Study of Characteristics of Construction and Demolition Waste Materials in Non-bituminous Layers of Flexible Pavement

Abstract

Over the generations, roads have paved a way for the development of the nation, be it, mass movement of people from sub-urban fringes to the developed parts of the country or making the goods and services available in the remotest areas; therefore, there has been a continuous demand for cost-effective sustainable improvement in the quality of roads. This paper addresses the feasibility of recycling and reusing the construction site (C&D) waste materials in granular sub-base layer (GSB layer, i.e., non-bituminous layer) of flexible pavement. It is a known fact that tonnes of the construction waste are generated each day due to the exponential growth in the infrastructural projects, especially in a developing country like India. Lesser availability of spaces and shortage of landfills have led to illegal dumping of such materials, resulting in immense environmental setbacks. Hence, a motivation and an attempt to resolve such problems by investigating the performance of recycled concrete aggregates (RCAs) are obtained from construction and demolition waste in various percentages, replacement of natural aggregates (NAs) for use in base and sub-base course of the flexible pavement using various experiments. Also, an additional comparison of the effect of thermal and acid treated (ATRCA) to the same RCA with sulfuric acid has been presented in this paper.