Comparative Study on Marshall Characteristics of Bituminous Mixes by Partial Replacement of Foundry Sand and Ceramic Tile Dust as Fine Aggregate

摘要

Bituminous hot mixes for flexible pavement construction are the most widely used throughout the world. Mainly aggregate, sand, bitumen and filler are used for flexible pavement construction. But in case of filler, engineers are divided according to their choice depending on the availability of materials and environmental condition. In this investigation an attempt is made to investigate the properties of bituminous pavement materials by the partial replacement of spent foundry sand and ceramic tile dust individually as fine aggregate with an increment of 10%. Actually Foundry sand is a high quality silica sand and it is used to form molds for ferrous (iron and steel) and non-ferrous (copper, aluminum, brass etc.) metal castings. A huge quantity of foundry sand is used by metal casting industries every year and disposed them after being used. On the other hand two sources are available for ceramic wastes. Ceramic’s industry is the first source and second is the construction sight of ceramic’s work. A huge quantity of ceramic wastes are produced from these sources and if these wastes can be utilized in pavement construction, the disposal and pollution problem can be minimized. The main target of this investigation is to determine optimum bitumen content (OBC) and suitable mix to ensure a durable and cost effective pavement after being partial replacement of foundry sand and ceramic tile dust. The proposed mix design will be conducted in accordance with Marshall Mix design. After performing the experimental investigation it is found that for 30% replacement of waste foundry sand and higher percentage of ceramic tile dust provide superior field performance and better stability than the conventional mixes.