DEVELOPMENT OF GREEN ENGINEERING CEMENTITIOUS COMPOSITE USING MARBLE DUST AND COAL BOTTOM ASH

Abstract

The development of Engineered Cementitious Composite (ECC) exemplifies the evolution of concrete technology, improving the concrete strength, flexibility, crack resistance, and ductility while minimizing its self-weight. Its unique properties and effective utilization in bridge infrastructures, high-rise buildings, marine structures, energy-efficient buildings, and sustainable structures, especially in seismic-prone regions, have made it a cutting-edge material. The innovative idea of the development of the Green Engineering Cementitious Composite (GECC) incorporating Marble Dust (MD) and Coal Bottom Ash (CBA) arises from the environmental challenges caused by cement production in the industry in the form of CO2 emissions, and the disposal of MD and CBA (waste materials) which are nothing more than a burden as landfill and challenge to the waste management. This research study comprehends these environmental challenges as an opportunity for innovation and proposes the development of GECC that not only provides a sustainable and environment-friendly outlet for the effective utilization of MD and CBA but also significantly minimizes the environmental impact associated with conventional cement production by minimizing its utilization. Sixteen different mixdesign proportions incorporated varying percentages of MD and CBA were cast. Mechanical tests including compressive strength test, splitting tensile test, flexural strength test, and modulus of elasticity were conducted to determine the effect of MD and CBA in the ECC. Based upon the obtained results, the optimum compressive strength and modulus of elasticity were determined by the mix-design proportion,15CBA + 05MD, incorporating 15% CBA and 05% MD. While optimum splitting tensile strength was determined by the mix-design proportion 10CBA + 10MD, incorporating 10% CBA and 10% MD, and optimum flexural strength was determined by the mix-design proportion 05CBA + 05MD, incorporating 05% CBA and 05% MD. Key Words: Green Engineering Cementitious Composite (GECC), Engineered Cementitious Composite (ECC), Marble Dust (MD), Coal Bottom Ash (CBA), Waste Materials, Sustainable Construction Material