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ASSESSMENT OF INDUSTRIAL WASTES AS A ROAD CONSTRUCTION MATERIAL: A REVIEW
Abstract – The scarcity of conventional natural materials and the jeopardized environment have been compelling the tendency towards evolution of new or alternate materials and resources to be incorporated in sustainable infrastructure development. The inclusion of such materials entails several secondary and tertiary materials. Indeed, there is a strong thrust to investigate the feasibility of locally available industrial waste materials to replace the conventional construction materials. In India, vast network of existing industries spread across length and breadth of the country and many more to come in the near future, are certainly going to generate millions of tonnes of variety of waste and by-product materials. The pollution and disposal problems can be minimised to greater extent by properly utilising these materials in civil engineering applications. Several types of waste/by-product materials have already been investigated, assessed, and evaluated for utilization and practice in the field. In this paper, assessment of different waste materials produced by various industries was reviewed for ascertaining their suitability in the construction of rural roads, embankments, and subgrade layers. Physical, chemical and geotechnical properties of these waste materials have been critically evaluated for this purpose. From the results, it has been observed that most of the materials have potential to be selected as source materials for embankment and as a construction material in roads. Materials like steel furnace slag and zinc slag found to have their useful in partial replacement of aggregate for the construction of sub-base and base layers.
Index Terms – Road materials, Industrial wastes, Waste utilisation, Geotechnical properties