Mechanical behavior of grouted sands with acrylates and polyurethane resins

Abstract

Chemical grouting is a technique where solution-based binders are used to improve both mechanical and hydraulic properties of the soils or rocks. The following research shows an extensive laboratory program where a polyurethane and an acrylate were grouted in a tertiary sand under different water contents, relative density, with different gelling time and different grouting conditions. Unconfined compressive strength (UCS), splitting tests, triaxial tests and creep tests on the grouted materials were performed. A statistical interpretation considering the Kernel probability density function was performed in order to understand the interdependency of the changing parameters. In general polyurethane-consolidated samples provide higher mechanical properties with respect to acrylates, however the effects and the dependency to the geotechnical base parameters are different.