Experimental Study on Uniaxial Compression of Saturated High Ductility Shotcrete Under Different Loading Rates
HU Shi1, CAI Haibing1, MA Zuqiao2, YUAN Zhu2, DING Zude3
1 School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China 2 Anhui Transportation Holding Group Co., Ltd., Hefei 230088, China 3 Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China
Abstract: In order to accurately evaluate the performance of a new high ductility shotcrete (HDSC) applied in super-long tunnel project of Wuhuang expressway, the tests of slump, rebound rate and the uniaxial compression tests of five loading rates under saturated water condition were carried out by using field construction conditions, and the properties were studied by combining the scanning electron microscopy, x-ray diffraction and nuclear magnetic resonance test. The results show that the slump of HDSC used in the field engineering is 168 mm, and the rebound rate is 8%, and its performance is excellent, which meets the engineering requirements. The water absorption increased rapidly at first, then slowly, and finally maintained a stable trend. Under saturated water condition, with the increase of loading rate, the peak stress, elastic modulus and energy sto-rage density limit of HDSC all show an upward trend, while the peak strain shows a downward trend, and is sensitive to the “strain rate effect”. Its compression failure process can be regarded as a ductile failure with cracks but no dispersion.
胡时, 蔡海兵, 马祖桥, 袁助, 丁祖德. 不同加载速率下饱水高延性喷射混凝土的单轴压缩试验[J]. 材料导报, 2022, 36(8): 21090227-10.
HU Shi, CAI Haibing, MA Zuqiao, YUAN Zhu, DING Zude. Experimental Study on Uniaxial Compression of Saturated High Ductility Shotcrete Under Different Loading Rates. Materials Reports, 2022, 36(8): 21090227-10.
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2022, Vol. 36 
