Abstract
Uniaxial compression tests, Brazilian tests, freeze-thaw tests and frost heaving tests were carried out for several saturated rocks under the temperature between -30°C and 20°C. Changes in mechanical properties and deformation behaviors were analyzed paying attention to the behavior of pore water. As the result, strengths increased due to temperature decrease except Inada granite. Two welded tuffs were fractured by the unfrozen water pressure. Frost heaving ability of Shirahama sandstone and Horonobe mudstone was confirmed. Furthermore, ratio of strength increase was correlated with specific surface area or unfrozen water content as well as porosity. The mechanisms of strength increase were discussed, taking deformation behavior for each rock into consideration.
