The construction sector consumes huge quantities of raw materials and generates large amounts of waste.This is the very reason that researchers and engineers worldwide are exploring every possible means to recycle and reuse construction and demolition waste (CDW).Moreover, the production of cement-based construction materials contributes about 5-8% of all global anthropogenic CO2 emissions, and this figure will continue to increase in the coming decades as developing countries, led by China, will consume more and more cement and concrete to fuel the booming urbanization programme.