Blending of Mineral Additions in Concrete

Cement concrete is one of the versatile construction materials. The growing demand for tall, lean yet strong structures has led to advancement in concrete technology. Deterioration of concrete structures arises due to chloride and sulphate present in concrete as a result of aggressive environments. Numerous million tons of waste products are generated yearly universal. Hence utilization of waste products becomes a serious problem. Additions of waste products help in improving the properties of concrete either fresh state or mechanical properties or both. However, each of waste products has some critical issues either by physical or physico - chemical properties. Blending helps in improving the limitation of a particular addition with the help of other material. According there can be binary, ternary and quaternary blends. Powder of waste glass act as a pozzolanic and inert material. Research has suggested that blending of powder additions can make concrete an affordable alternative. In this paper, an attempt has been made to find out the effect of chloride and sulphate attack on the properties of concrete containing waste glass powder (GP) [conglasscrete] as pozzolana and inert. Experimental work has been carried out with cement replacement by the GP in the range of 5% to 40% in increments of 5% by weight of cement and EPCO KP-200 used in concrete as a corrosion inhibitor with 2% by weight of cement. Replacement of 20% cement by GP and the addition of 2% EPCO KP-200 by weight of cement not only increased strength and durability but also reduced the unit weight of concrete subjected to chloride or sulphate attack.