Properties of cement based permeation grout used in ground engineering

Abstract

This thesis presents the results of a study on the properties of cement based permeation grout, focusing on some important grout parameters, such as the rheological properties (i.e. yield stress and viscosity) and the injectability of cement grout, (i.e. coefficient of permeability to grout, kG) which govern the performance of cement based permeation grouting in porous media. Due to the limited knowledge of these important grout parameters and other influencing factors, e.g. the stability, pressure filtration (i.e. loss of water under the applied pressure), setting time of cement grout, the pressure, rate and time of injection and the grout volume adopted in the field work, the application of cement based permeation grouting is still largely a trial and error process in the current practice, especially in the local construction industry.