ABSTRACT
Portland cement concrete has clearly emerged as the material of choice for the construction in the world today. This is mainly due to low cost of materials and construction for concrete structure as well as low cost of maintenance. Therefore, much advancement of Concrete Technology have occurred depending on (i) the speed of construction (ii) the strength of concrete (iii) the durability of concrete and (iv) the environmental friendliness of industrial material like, fly ash, blast furnace slag, silica fume, metakaolin etc. (Mehta 1999).
