Study on Using Cellular Lightweight Concrete Mixed with Bagasse Ash Replacing Pavement to Enhance Slope Stability: A Case Study of Soi Pu Seng Charoensuk

Abstract

The study focuses on replacing road pavement with a cellular lightweight concrete mixing bagasse ash. The replacement of Portland Cement Type I with bagasse ash in amounts ranging from 0 to 40 percent by cement weight. Additionally, it studies various binders to sand mixtures at ratios of 1:0.5, 1:1, 1:1.5, and 1:2. The mortar was cast to test its compressive strength and to determine the appropriate proportions for forming lightweight cellular concrete based on the compressive strength and material preparation. The study involved in a simulation to assess the stability of an experimental road with a height of 1.5 meters, where the pavement material was substituted with lightweight concrete. The simulation observed the impact of a sudden loss of roadside water pressure, both with and without traffic at a pressure of 6.0 kPa. The study exposed that the test site was less stable when the soil rapidly lost water from the sides and was subjected to traffic pressure. The substitution of compacted soil with lightweight concrete resulted in an increase in stability to over 1.3 according to the Thailand engineering standards.