EFFECT OF GRANULATED BLAST FURNACE SLAG AS SUBSTITUTE FOR FINE AGGREGATE IN CEMENT MORTAR AND CONCRETE

C.G.Konapure, S.S.Patil

Abstract: The objective of present investigation was to study the effect of granulated blast furnace slag as substitute for fine aggregate in cement mortar and concrete. Now a days, river sand becomes scarce and costly too, which is one of the very important ingredient of concrete and cement mortar mix especially in India and the world consumption of sand in concrete generation along is around 1000 to 1100 million tonnes per year, making its scarce and limited. Shortage of river sand resulted into the over dredging of river sand which causes environmental threat and loss of aquatic life also. In this paper granulated blast furnace slag is used as substitute for river sand in cement mortar and concrete, to overcome the environmental problems created due to over mining. In this investigation, in a cement mortar and concrete replacing natural sand by granulated blast furnace slag in a range of 20%, 40%, 60%,80% and 100%. The workability and strength of cement mortar and concrete with varying percentage of granulated blast furnace slag substitute which is then compare with workability and strength of conventional concrete. To determine the workability and strength of cement mortar and concrete, cubes of standard sizes 150mm x 150mm x 150mm (for concrete) and 70mm x 70mm x 70mm (for cement mortar) for 3 rdday (cement mortar), 7th day and 28th days were casted and tested under compression testing machine . The work is extending to 100% replacement of natural sand with granulated blast furnace slag for M-20 grade of concrete and cement mortar. The compressive strength and flow characteristic of various mixes at various curing periods are studies. The study has shown that, the granulated blast furnace slag can be used as best alternative construction material over river sand. By these substitution and study one can achieve environmental protection as well as economy.

Keywords: River Sand (RS), Granulated Blast Furnace Slag (GBS), Cement Mortar, Concrete, Workability, Compressive Strength.

DOI: https://doi.org/10.15623/ijret.2016.0508033