Abstract
The change in mechanical characteristics of mortar due to degradation was investigated. Degraded specimens were prepared by mixing expanded polystyrene (EPS) beads with mortar, and sound specimens include no beads. These EPS beads are very soft compared with mortar; they have a diameter of 0.22 cm and a density of 0.03 g/cm3. Uniaxial compression test and a splitting test were carried out with these specimens. The mechanical behaviors are investigated on the basis of the differences between each type of material (degraded and sound), load (monotonic and cyclic), and failure (compression and splitting). The stress-strain relationship was examined, by which the damage parameters are determined.
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