Through large scale shear test study on the contact face between the mudcake with different thicknesses and concrete with different roughnesses
various strength and deformation indices have been obtained. The test results show that under the mudcake with the same thickness
the rougher the contact face of concrete
the larger the strength and deformation indices; under the contact face with the same roughness
the thinner the mudcake
the larger the strength and deformation indices. Causes for the above differences among the strength and deformation indices under different test conditions are analyzed. It is appropriate to take into account the existence of mudcake during the tests.