全珊瑚海水混凝土动态冲击性能试验研究

doi:10.11896/cldb.18070094

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Abstract The impact strength and toughness of coral aggregate seawater concrete (CASC) were improved by adding sisal fibers and using basic magnesium sulfate cement (BMSC).The CASC was subjected to dynamic impact compression properties using the Φ75 mm split Hopkinson pressure bar (SHPB) to obtain impact compression properties at four strain rates. The result show that CASC has obvious strain rate hardening effect . When the strain rate is in the range of 56—137 s^-1, the basic magnesium sulfate cement and sisal fiber is 1.19 times to 1.29 times the DIF of ordinary Portland cement CASC. Both sisal fiber and BMSC have toughening properties for CASC. After comprehensive application, the toughness index increases by 2.24 times, 1.86 times, 1.35 times and 1.18 times, respectively. After adding sisal fiber (the content is 3 kg/m³) or using BMSC, the impact resistance of CASC is enhanced, and the comprehensive application is better than using one of them alone.

Key words： coral aggregate seawater concretel (CASC) split Hopkinson pressure bar (SHPB) sisal fibers basic magnesium sulfate cement(BMSC) strain rate effect dynamic increase factor (DIF)

Published: 12 July 2019

CLC number:

TU528

Fund:This work was financially supported by the National Natural Science Foundation of China (51508272,51678304), Jiangsu Provincial Natural Science Foundation (SBK2018041341), China Postdoctoral Science Foundation Project (2018M630558).

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	Articles by authors
	YUE Chengjun
	YU Hongfa
	MA Haiyan
	ZHANG Yan
	MEI Qiquan
	DA Bo

Cite this article:

YUE Chengjun,YU Hongfa,MA Haiyan, et al. Experiment Study on Dynamic Impact Properties of Coral Aggregate Seawater Concrete[J]. Materials Reports, 2019, 33(16): 2697-2703.

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http://www.mater-rep.com/EN/10.11896/cldb.18070094 OR http://www.mater-rep.com/EN/Y2019/V33/I16/2697

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