ABSTRACT
The following paper shows some hydro-mechanical tests performed on a sand grouted with varying colloidal silica mixtures. By diluting the original product, i.e. part A which is the Geogrout seal with 40% solid content, and additionally changing the amount of accelerator, part B, the soil mechanical improvement was investigated. Unconfined compressive strength tests, permeability and direct shear tests were performed on the non-treated and treated sand. Some statistical considerations have been also performed. Results clearly point out the increase in strength and decrease in permeability, therefore indicating the colloidal silica as a valuable solution for ground improvement by grouting.
