Use of Steel Slag and Aggregate for Pavement Sub-Base

Abstract

In the construction project such as highway project for the construction of pavement lot of raw material like soil, aggregate, sand, etc. required. The resources of this material are limited, and availability of this material at the project site is less thus it is required to bring this material from their source like stone query to the project site, this lead to increase the cost of the project as the transportation cost, fuel cost vehicle operating cost associate with it. Thus it is required to replace this material with the locally available waste material like steel slag, ground granulate blast furnace slag, fly ash. This material is industrial by-product generated from power plant, steel plant, and disposal of this waste material is causing environmental problem thus efficient utilization of this material can reduces the environmental issue and can replace the traditional material thus reduces the dependability on conventional aggregate. At present many construction firms, institute, agency is researching to find the substitute of conventional aggregate that can gives the same quality and performance. Lots of studies has been carried out to find the possible combination of different material like steel slag, fly ash, sand, course aggregate and fine aggregate with cement for the sub-grade, base course a sub-base course of pavement. In this study it is tried to use the STEEL SLAG for sub-base layer and The basic engineering properties of individual material, characterization and chemical composition, gradation of all material used is found, The mix design is done by the blending of material at desire gradation, CBR test is carried out to determine the strength characteristic of slag. Permeability, expansion and other performance test is carried out to ensure the structural stability and strength.