Strength and Durability Studies on Higher Grade Concrete with High Volume Fly ash
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Abstract
Portland cement, as an ingredient in concrete, is one of the widely used construction materials, especially in developing countries. The CO2 emission during its production and the utilization of natural resources are important issues for the construction industry to participate in sustainable development. These limitations led to the search for alternative binders or cement substitutes. Fly ash is finely divided residue resulting from the combustion of powered coal and transported by the flue gases and collected by electrostatic precipitator. There are multiple benefits for the sustainable development of the construction industry by using fly ash to increase the strength characteristics of structural members. The objective of the present investigation is to study the mechanical strength behavior of High Volume Fly ash concrete pavement slab. The optimum maximum coarse aggregate size for the best compressive strength of 28 day concrete was therefore found to be 8mm for the water/cement ratio of 0.63. The analysis further shows that as heterogeneity increases the compressive strength of concrete reduces
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