“Effect of Different Cementitious Materials on Sustainable Concrete Used for White Topping”

Abstract

White topping is a solution to increase the durability of bituminous pavement in urban areas. Concrete is a material that is substantially stronger and less sensitive to high temperatures. Due to its superior performance against rutting and cracking, concrete overlay is displacing traditional bituminous overlay even in rehabilitation and repair (Sinha et al.2007). This paper presents the findings of experimental investigation with the objective of studying the properties of concrete required for white topping in fresh and hardened state with different cementitious materials and fiber additions. Trials are taken to prepare the mix design of the concrete with different cementitious materials with different % substitutions of substituted materials namely fly ash, micro silica and rice husk ash. An attempt is also made to enhance diminished property which may be caused due to cementitious material by addition of polypropylene fibers. In this research the results are experimentally validated and further extended with addition of other sustainable materials such as micro silica and rice husk ash. The research is carried out on concrete cubes for compressive strength and concrete beams for flexural strength properties with trial mix designs.