DESIGN AND CONTROL OF CHEMICAL GROUTING. VOLUME 2--MATERIALS DESCRIPTION CONCEPTS

This report consists of three major parts that deal with (a) specimen preparation and testing procedures for grouted soils, (b) effects due to sampling, and (c) concepts related to determining whether or not a soil is groutable. In the initial part over three hundred unconfined compression tests and more than thirty creep tests were conducted on laboratory prepared grouted specimens to investigate the influence of preparation and testing methodology on the magnitude and reproducibility of the strength and deformation characteristics of grouted soils. Then specimens subjected to different grouting histories and stress paths were tested to evaluate the effect of various sampling and testing conditions on the material properties. And finally, the groutability of a given soil by a particular chemical grout was examined by performing several series of permeability tests where the grout was under low (on the order of unity) to high (more than 200) gradients and injected into laboratory models wherein the flow regime was linear, cylindrical, or spherical. (FHWA)