X. Zhengbing et alii, Frattura ed Integrità Strutturale, 34 (2015) 574-579; DOI: 10.3221/IGF-ESIS.34.63 574 A comparative study on dynamic mechanical performance of concrete and rock Xia Zhengbing, Zhang Kefeng, Deng Yanfeng, Ge Fuwen College of Architecture and Civil Engineering, Jiangsu City Vocational College Nantong Campus, Nantong, Jiangsu, 226000, China A BSTRACT . Recently, engineering blasting is widely applied in projects such as rock mineral mining, construction of underground cavities and field-leveling excavation. Dynamic mechanical performance of rocks has been gradually attached importance both in China and abroad. Concrete and rock are two kinds of the most frequently used engineering materials and also frequently used as experimental objects currently. To compare dynamic mechanical performance of these two materials, this study performed dynamic compression test with five different strain rates on concrete and rock using Split Hopkinson Pressure Bar (SHPB) to obtain basic dynamic mechanical parameters of them and then summarized the relationship of dynamic compressive strength, peak strain and strain rate of two materials. Moreover, specific energy absorption is introduced to confirm dynamic damage mechanisms of concrete and rock materials. This work can not only help to improve working efficiency to the largest extent but also ensure the smooth development of engineering, providing rich theoretical guidance for development of related engineering in the future. K EYWORDS . Concrete; Rock; Dynamic mechanical performance; SHPB. I NTRODUCTION tudies focusing on dynamic mechanical performance of rock materials, a relatively basic branch in rock mechanics, originate from researches on safety protection of atomic energy plant and earthquake engineering [1]. As engineering construction frequently involves rock materials in the last few years, to be specific, national large-scale energy engineering including water and electricity and nuclear power project, transportation including national railway and highway, engineering including blasting excavation and fixed point blasting or facilities establishment including high-level building, bridge, airport pavement and dam all involves dynamic mechanical performance of rock materials under the impact of medium and high strain-load [2], more and more experts and scholars devote themselves to deep study of dynamic mechanical properties of rock materials. Compared to statics of rock materials, difficulties encountered by works on dynamics are tougher. In the perspective of mechanical analysis alone, knowledge theories of physics and mathematics are more complicated [3]. Consequently, research on mechanics of rock materials has still remained at immature stage, and what is worse, some related areas are just started. Concrete and rock are two kinds of the most commonly seen materials among rock materials which are usually combined used in engineering practice, such as airport pavement engineering, ground foundation engineering and mine resource S