Effectiveness of Silicate Grout in Sand of the First Sand Layer of Bangkok Subsoil

Abstract

This paper presents the research work on grouting of sodium silicate solution into sand with constant injection rate. The influence of rate of injection and grout viscosity on the grout shape is reported. The sand sample was collected from the first sand layer of Bangkok subsoil. The sodium silicate solution with viscosity of 110 centipoise and 130 centipoise is injected into the saturated sample in the test mold. The rate of injection is 4.56, 6.08, and 7.60 mL/min. The results show that the rate of injection has a significant influence on the grout results. Additionally, the low grouting rate cause fracture grout in soil and high grouting rate cause mixture between permeable grout type and fracture grout type is related to the pressure grouting in sample.