Study on Effects of Granulated Blast Furnace Slag (Bfs) in the Engineering Behavior of Stabilized Soft Soils

Abstract

This project work aims to evaluate the effect of addition of 0%, 5%, 10%, 15%, and 20% BFS into the soil and stabilizing with blackish gray soil. This study extended the suitability to be used into the construction material for road, embankment and structural fills. The Granulated Blast Furnace Slag (BFS) is collected from JSW Steel Plant at Bellary Karnataka and blackish gray soil samples were collected from Bangalore at Mysore, national highway authority of India road of Mysore, Karnataka for evaluating its suitability as a construction material for various geotechnical works. Preliminary examination was carried out on Consistency properties, compaction properties, and strength parameter tests like plasticity index, specific gravity, free swelling index, compaction, swelling pressure, California bearing ratio (CBR) and unconfined compressive strength (UCS). In this report the effects of BFS addition into the soil is investigated and is compared with the virgin blackish gray soil. Based on the analysis of experimental results the Plasticity Index is decreased up to a value of 27.6% addition of 12% of BFS with blackish gray soil. The UCS value is maximum by addition of 10% of BFS afterwards the UCS value decreases with further addition in BFS. in to the  Moreover, results indicate that inclusion of BFS increases the strength of soft soils, UCS of 10% BFS modified soil was found approximately 28% higher compared to raw soil. Similarly, significant improvement has been observed for un-soaked and soaked CBR value of soils.