Shear strength and deformability of filled indented joints

Review of previous work on the project -- Statement of objectives for the third year -- Outline of the performed work -- Organization of work -- Review of published information about the effect of gouge infilling on the strength and deformability of rock joints -- Nature of the problem -- Review of some published work on the strength of filled joints -- Summary of the main findings to date on the behaviour of filled joints -- Direct shear tests on filled indented joints -- Purpose and scope -- Equipment -- Properties of the rock-like materials and the shape of indentations -- Tests on clay-filled joints -- Tests on joints filled with sandy silt.