UTILISING WASTES AS PARTIAL REPLACEMENT IN CONCRETE – A REVIEW

The production of cement is responsible for large amount of CO2 emission in the atmosphere.According to CEMBEURO (The European Cement Association), 5% of world's total CO2 is released from cement manufacturing plants. Researchers have been studying on materials which have similar properties as of cement and can be used to replace it. Previous works have been done already on replacing materials like cement and fine aggregates with waste materials. Waste materials like fly ash, GGBS and plastic bottle fibers were used as partial replacement in concrete in many researches.Fly ash and GGBS are supplementary cementitious materials (SCM) which can be used to partially replace cement while plastic bottle (PET) granules can be used to partially replace fine aggregates in concrete.Thus using SCMs in concrete is an effective way of diminishing CO2 emission in the atmosphere. Despite that, these SCMs also improve the mechanical properties and durability of concrete.