Depending on the residue addition, change in the plasticity of the clay body was measured. For this purpose, Pefferkorn test was used. 3340mm cylindrical test pieces (for plasticity and compression test) and 2525150mm prismatic test samples (for dry bending strength) were shaped with extrusion method [12]. The consistency present at 24mm residual deformation level corresponds in scale nearly to the degree of stiffness necessary for the production of column deformation. After test, residual heights of the samples were measured. 24-mm residual height and corresponding water content isnot ed asplas ticity water.