A STUDY ON STRENGTH AND DURABILITY PROPERTIES OF FLYASH CONCRETE WITH STEEL FIBERS

Abstract

Fly ash is a waste product which is generated in thermal power stations. The quantity of fly ash produced from thermal power plants in India is approximately 250 million tons each year, and its percentage utilization is less than 13%. Majority of fly ash produced is of Class F type. The use of these materials would reduce the disposal problems now faced by the thermal power stations and industrial plants. During the last few years, some cement companies have started using fly ash in manufacturing cement, known as 'Pozzolana Portland cement', but the overall percentage utilization remains very low, and most of the fly ash is dumped at landfills. Fine aggregate is natural resource in nature and to meet the demand of concrete in construction we are exploiting it gradually. Here concrete is made by using fly ash as replacement to sand. In this way can save the natural resource by reducing its usage by using alternative product. Fly ash is generally used as replacement of cement, as an admixture in concrete, and in manufacturing of cement. Concrete containing fly ash as partial to complete replacement of fine aggregate will improve its strength on long-term basis. In this investigation fly ash is used as sand replacement material. The material mix of proportion 1:1.58:3.2 Each category comprises of various percentages of sand replacement material in increasing order i.e. 25%, 50%, 75%, and 100%. In addition to this crimped steel fiber of 1% and 2% is incorporated for concrete works. The workability is maintained constant range for all mixes. Strength characteristics such as compressive strength split tensile strength and flexural strength of concrete mixes are found out for 7, 14 and 28 days curing period and results are analyzed.