1.1 This test method presents a procedure for determining the thermal conductivity of soil and soft rock using a transient heat method. This test method is applicable for both undisturbed and remolded soil specimens and soft rock specimens. This test method is suitable only for isotropic materials.1.2 This test method is applicable to dry materials over the temperature range from 20 to 100C. It may be used over a limited range around ambient room temperatures for specimens containing m