Measurement of Mechanical and Transport Properties in Drying Shrinkage Materials

Effects of moisture content on mechanical properties (Young's modulus, yield stress, tensile strength) of drying shrinkage materials (Kibushi, Haido and mixed clay, to which 10wt % of glass beads are added) were studied by measuring the stress-strain curves experimentally. It was found that these properties strongly affect the moisture content. Liquid transport properties (Permeability and osmotic suction pressure) were measured and a strong dependence was found. When glass beads are added to the Kibushi, Young's modulus and yield stress decrease and permeability increases in spite of the same tensile strength and osmotic suction pressure.