Abstract:As a kind of natural building material,rock usually is influenced by weathering. Therefore,it is necessary to research the influence of weathering on rock physical and mechanical characteristics. The changes of the temperature and water in rock are mainly reasons of weathering,especially cycles of freeze-thaw. Jiaozuo marble specimens were divided into three groups:saturated,dry and referenced groups. Through test on saturated group and dry group experienced 60 cycles of freeze-thaw(each cycle costs 24 h,namely,18 h freezing and 6 h thawing),weathering process of marble was simulated. Before freezing-thawing and after every 10 cycles of freeze-thaw,the mass and volume of specimens were measured and the ultrasonic P-wave and ultrasonic S-wave velocities of specimens were tested using ultrasonic testing instrument. The uniaxial compressive failure experiments of marble specimens were performed by RMT–150B rock mechanics test system. At the same time,the process of deformation and failure for specimens was monitored using LOCAN 320 acoustic emission test system. Through above-mentioned tests,the changes of the mass and volume,ultrasonic velocities,the complete stress-strain curves,uniaxial compressive strengths,frost resisting coefficient,weathering degree,dynamic elastic modulus and acoustic emission parameters for marble specimens were obtained before and after freeze-thaw. Consequently,main physical and mechanical characteristics of marble were summed up under cycles of freeze-thaw.