Abstract
This paper shows the fundamental physico-chemical properties of base resin and reactant used for chemical grout. In this study, three types of grout materials including non-alkaline sodium silicate, activated colloidal silica and active composite silica were selected, and a plurality of experiments changing type of grout material, silica concentration and curing time were carried out to measure the volume shrinkage and the unconfined compression strength of plain gel and sand specimen improved by the grout. In conclusion, it was revealed that the volume shrinkage of plain grout gel depended on the type of grout material and the degree of silica concentration. Even though the volume shrinkage of plain grout gel occurred, it appeared that the unconfined compression strength of the sand specimen improved by the grout material did not deteriorate.
