Abstract: Energy is one of the most important factors in economic growth and social development in all countries. Construction works consume energy at different levels in every stage of the life-cycle. Construction materials occupy a great share of this consumption. Therefore, the amount of energy consumed by materials used in structures during their lifecycle is an important parameter in determining the energy efficiency of the Structure. In this experimental study, the importance of energy efficient material selection in designing “Energy Efficient Cement Concrete” is considered and discussed. It presents the feasibility of the usage of by product waste materials like fly ash, query dust, marble powder/ granules, plastic waste and recycled concrete and masonry as aggregates in concrete. The use of fly ash in concrete contributes the reduction of greenhouse emissions with negative impacts on the economy and reduction of quantity of cement in concrete, hence energy required for production also reduced. It has been observed that 0.9 tonne of CO2 is produced per ton of cement production. The concrete is made with wastes materials which are eco-friendly so called as Green concrete. Thus, by the use of green concrete it is possible to reduce the CO2 emission in atmosphere towards eco-friendly construction technique and also reduce energy required for production of Ordinary Portland Cement.

Keywords: Energy Efficient Cement Concrete, Green Concrete, Fly Ash, Lifecycle, Greenhouse Emission.