Durability of high volume flyash concrete

Abstract

Concrete is by far the most widely used construction material worldwide. First, it consumes huge quantities of virgin materials. Second, the principal binder in concrete is cement, by these production the greenhouse gas is increased which causes effects the global warming and climatic changes. Many structures suffer from lack of durability that has an adverse effect on the resource productivity of the industry. The supplementary cementing materials like natural materials, by-products or industrial wastes are used. The cement is replaced with high volumes of fly ash (>40 %) for M30 and M40 grades with % variation of flyash used in this grades and also finding the durability of high volume fly ash concrete (HVFC). The compressive strength test to be conducted to justify the strength properties of HVFC. Few durability properties like resistance to 2 and 5 % sulfuric acids and resistance to 2 and 5 % hydrochloric acids, resistance to 5 % magnesium sulfate solution and resistance to 5 % sodium chloride solution were studied. The mass variation of the specimens are also to be studied for M30 and M40 grades of concrete for HVFC when immersed in acids, the strength testsof the specimens that are immersed in acid solutions to be found. The deterioration effect of sulphuric acid and hydrochloric acid are to be compared. The strength parameters of fly ash replacing will be compared with the nominal mix of HVFC.