Experiment investigation for dynamic behavior of hybrid fiber effects on reactive powder concrete

Liwen Wang; Baojun Pang; Zhenqi Yang; Runqiang Chi

doi:10.1117/12.851538

14 April 2010 Experiment investigation for dynamic behavior of hybrid fiber effects on reactive powder concrete

Liwen Wang, Baojun Pang, Zhenqi Yang, Runqiang Chi

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752239 (2010) https://doi.org/10.1117/12.851538
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

The influences of different hybrid fibers (steel fibers add polyvinyl-alcohol fibers) mixture rates for reactive power concrete's (RPC) dynamic mechanical behavior after high temperature burnt was investigated by the Split Hopkinson pressure bar (SHPB) device. A plumbic pulse shaper technique was applied in the experiment, PVDF stress gauge was used to monitor the stress uniformity state within the specimen. The strain rate was between 75~85s-1, base on the stressstrain curves and dynamic modes of concrete specimen, the hybrid fiber effect on the dynamic properties was determined. The results show, dynamic compression strength of specimens which mixed with steel fibers (1.0%,1.5%,2.0% vol. rate) and 0.1% PVA fibers is higher than normal reactive powder concrete (NRPC), but the toughness improves unconspicuous; while strength of the one which has both steel fiber (1.0%,1.5%,2.0% vol. rate) and 0.2%PVA fiber declines than NRPC but the toughness improves and the plastic behaviors strengthened, stress-strain curve has evident rising and plate portions. It can be deduced that the concrete with mixed two kinds of fibers has improved dynamic mechanical properties after high temperature burnt. By compounding previous literature results, the mechanism of the experimental results can be explained.

Citation Download Citation

Liwen Wang, Baojun Pang, Zhenqi Yang, and Runqiang Chi "Experiment investigation for dynamic behavior of hybrid fiber effects on reactive powder concrete", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752239 (14 April 2010); https://doi.org/10.1117/12.851538

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