Abstract
Disposal problem of waste materials and excessive demand on naturally available resources due to rapid urban development has opened possibilities for use of waste materials in construction industry. Many waste materials are used in concrete as replacement to cement, fine aggregate, coarse aggregate and reinforcement. Here review of some waste materials, whose ash is used as partial replacement to cement in concrete, is presented. Different properties of fresh and hardened concrete, when admixed with ash of waste materials are reviewed. Concrete containing sugar cane bagasse ash, ground nut shell ash, rice husk ash, saw dust ash, and tobacco waste ash are reviewed. After review, it is observed that further studies are required on all waste ashes replacing cement, which will reveal more potential on their usage in concrete. Concrete containing ash of waste materials attained demanded strength within 5% to 20% replacement.
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