不同加载速率下饱水高延性喷射混凝土的单轴压缩试验

doi:10.11896/cldb.21090227

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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.

Key words： high ductility shotcrete hybrid fibers manufactured sand loading rate energy storage density limit

Published: 25 April 2022 Online: 2022-04-27

CLC number:

U454

Fund:National Natural Science Foundation of China (51778004, 52168057), Academic Funding Program for Top Academic Talents of Colleges and Universities of Anhui Province in 2019 (gxbjZD10), University Graduate Scientific Research Project of Anhui Province in 2021 (YJS20210381), Graduate Innovation Fund of Anhui University of Science and Technology (2021CX1006), Key Science and Technology Project of Anhui Communications Holding Group Co., Ltd. (JKKJ-2018-31).

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	Articles by authors
	HU Shi
	CAI Haibing
	MA Zuqiao
	YUAN Zhu
	DING Zude

Cite this article:

HU Shi,CAI Haibing,MA Zuqiao, et al. Experimental Study on Uniaxial Compression of Saturated High Ductility Shotcrete Under Different Loading Rates[J]. Materials Reports, 2022, 36(8): 21090227-10.

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http://www.mater-rep.com/EN/10.11896/cldb.21090227 OR http://www.mater-rep.com/EN/Y2022/V36/I8/21090227

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