A Study on Properties of Concrete Made with Processed Granulated Blast Furnace Slag as Fine Aggregate

Venkataramu Vibha,B V Venkatarama Reddy

doi:10.1088/1757-899x/829/1/012008

Abstract

This study focusses on understanding the influence of processed granulated blast furnace (PGBS) slag on fresh and hardened state properties of concrete. Nowadays, metallurgical slags are being explored as alternative materials to natural virgin aggregates in concrete. Before using any such material in concrete, it is important to understand its influence on properties of concrete. In this study an attempt has been made to use granulated blast furnace slag from a local steel plant as a substitute to natural sand in normal concrete. The study mainly focusses on understanding the influence of different replacement ratios and suitability of slag replacement ratios higher than 50% in normal concrete. The blast furnace slag used in the present study was processed using a vertical shaft impactor to modify the particle shape and enhance its aggregate properties. The replacement was done at 50%, 75% and 100% by mass of natural sand in the concrete mix. The concrete properties such as slump, compressive strength, splitting tensile strength and flexural strength, were studied at all the replacement ratios.

Highlights

The acute shortage of natural sand has made the Indian construction industry to look for all possible alternative materials
The results of tests conducted on concrete mixes such as slump measurement, compressive strength, split tensile strength, flexural strength studies are discussed
The slump reduced with increasing replacement levels of processed granulated blast furnace (PGBS)

Summary

Introduction

The acute shortage of natural sand has made the Indian construction industry to look for all possible alternative materials. This study focusses on understanding the influence of processed granulated blast furnace (PGBS) slag on fresh and hardened state properties of concrete. The blast furnace slag used in the present study was processed using a vertical shaft impactor to modify the particle shape and enhance its aggregate properties. The concrete properties such as slump, compressive strength, splitting tensile strength and flexural strength, were studied at all the replacement ratios.

Results

Conclusion