Mechanical Properties of Lightweight Soil Mixed with Wasted Rigid PUF

摘要

Various types of lightweight soils been developed as fill materials over soft grounds and/or behind retaining walls in order to achieve the stability and less deformability.In this study,wasted polyurethane foam(PUF) was used as the lightweight plastic material for a new type of lightweight soil.Since a large amount of the rigid PUF was disposed of every year,if the rigid PUF can be effectively used,the resulting lightweight soil will greatly con-tribute to the improvement of our environmental problems.The effect of the rigid PUF on the strength and deformation properties of lightweight stabilized soil was investigated based on unconfined compression tests.The main results obtained from this study were: 1)Peak and yielding of the new lightweight soil mixed with PUF depend on the cement content,but not the type of PUF.2)The stress-strain curves obtained from the compression tests and strain depend on the type of rigid PUF.