Mechanical behavior of rock-filled concrete with uniaxial compression
WANG Hui1, MA Jiajun1, ZHOU Hu2, HE Shiqin1, JIN Feng2
1. School of Civil Engineering, North China University of Technology, Beijing 100144, China; 2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Abstract：Uniaxial compression tests of rock-filled concrete (RFC) and self-compacting concrete (SCC) were used to measure the complete stress-strain curves for these samples. The results showed the failure modes, peak stresses, peak point strains, elastic moduli and full stress-strain curves of the rock-filled concrete and self-compacting concrete. The results show that the failure interface of the rock-filled concrete is not only the interface between the rockfill aggregate and the self-compacting concrete matrix, but also the fracture surface in the rockfill aggregate itself. During later failure stages, the rockfill structure reduces the slope of the falling section of the stress-strain curve for the rock-filled concrete specimen. The average peak stress of the rock-filled concrete was 29% less than for the self-compacting concrete, the peak strain was 51% less, and the average elastic modulus was 42% more. The shape and position of the rockfill aggregate and the bond between the rockfill aggregate and the self-compacting concrete all affect the mechanical properties of the rock-filled concrete, which makes the test results show the characteristics of large dispersion. The theoretical stress-strain curves for the rock-filled concrete and the self-compacting concrete agree well with the measured curves.
王辉, 马嘉均, 周虎, 何世钦, 金峰. 堆石混凝土单轴受压力学性能[J]. 清华大学学报（自然科学版）, 2022, 62(2): 339-346.
WANG Hui, MA Jiajun, ZHOU Hu, HE Shiqin, JIN Feng. Mechanical behavior of rock-filled concrete with uniaxial compression. Journal of Tsinghua University(Science and Technology), 2022, 62(2): 339-346.
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2022, Vol. 62 
