COHESIVE AND ADHESIVE PROPERTIES OF SILICATE GROUT ON GROUTED-SAND BEHAVIOR

The role of grout cohesive and adhesive strengths on the mechanical pr operties of silicate-grouted sands was investigated. Ottawa 20-30 sand , lime aggregate, and sodium silicate grout with organic reagents were used in this study. An adhesive-tension test was used to evaluate the strength of grout-sand interface for up to 2 years of curing time. A stiffness model for particulate composites was modified to account for grout-particle interaction and then used to predict the modulus of gr outed sand. A phenomenological approach was used to develop a model fo r the grouted-sand strength in terms of the grout cohesive and adhesiv e strengths.