STUDY ON APPLICATION OF MUNICIPAL SOLID BOTTOM ASH REPLACING SAND CUSHION BELOW STRIP FOUNDATIONS ON WEAK GROUND
Keywords:Municipal solid bottom ash, internal friction angle, apparent cohesion, finite element method, Mohr-Coulomb model
So far, several publications on physical and mechanical properties of solid bottom ash have been reported, in which proposals on utilizing the bottom ash to produce lightweight concrete, backfill materials behind retaining walls, asphalt concrete additives and road embankment materials are also pointed out. In this study, series of laboratory experiments were carried out to determine the mechanical properties of the municipal solid bottom ash collected from Thanh Quang - Dan Phuong - Hanoi. Based on the results of the experiments, FEM analyses of a strip foundation on the bottom ash cushion which partially replaces the underlying soft soil layer were conducted. It is derived from the numerical results that the bottom ash could be used to replace the sand cushion in reinforcing of weak ground below foundation.