STUDY ON INTERACTION OF PULL-OUT TESTING BETWEEN TIN TAILING AND REINFORCEMENT FOR GEOSYNTHETIC REINFORCED SOIL ABUTMENT

Abstract

This paper presents a relevant and timely study on the use of tin tailings, which are the solid waste material extracted from tin mineral processing at tin mine in the northern region of Thailand, as an alternative backfill material in Geosynthetic Reinforced Soil (GRS) abutments. By conducting a series of physical model tests under varying normal loads, including a test with a single-layered and double-layered geosynthetic reinforcement. The study provides practical insights into the pull-out behavior and deformation characteristics of the GRS composite system. The application of tailings characterized a mixture of various particle sizes with a maximum particle size of 4.75 mm, and a friction angle of 37° which demonstrates a promising approach to sustainable construction. The tailing mainly contains Silicon (Si) and other different proportions of elements without harmful chemical components. The paper aligns well with current engineering practices and sustainability goals by integrating waste utilization within the context of GRS design.