Study of standard grade concrete consisting of granulated blast furnace slag as a fine aggregate

Abstract

The present confront in front of Civil Engineers is to determine alternative materials for fine aggregates in concrete. Since, most of the State Govt. banned the dredging of river sand and there is an enormous short fall of availability of river sand. Hence, the Granulated blast furnace slag is considered as a fine aggregate in concrete. Current stage, in India Steel Industry produces about 40 Million tonnes and by 2020 it is estimated to 60 million tonnes. The Author has investigated the effect of mechanical properties such as compressive, Flexural and split tensile strength and durability aspects such as water permeability, rapid chloride permeability, when Granulated blast furnace slag is used (GBFS) as a fine aggregate in concrete. The work includes the partial and fully replacement of River Sand (RS) and Manufactured (MS) sand by granulated slag in M40 standard grade of concrete with a constant W/C of 0.40. The replacement of RS and MS by GBFS is 30, 50, 80, and 100% are used. It has been observed that concrete made with 50% of river sand and 50% (GBFS) is nearer to Zero percent replacement in OPC, PPC, and PSC Concrete.