Experimental Study on Fracture Properties of Hybrid Fiber Reinforced Concrete

Yun Da Shao; Wen Feng Wang

doi:10.4028/www.scientific.net/AMR.450-451.518

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 450-451Experimental Study on Fracture Properties of...

Experimental Study on Fracture Properties of Hybrid Fiber Reinforced Concrete

Abstract:

Though fracture test on the fifteen specimens with notch of hybrid fiber reinforced concrete with the size of 100mm×100mm×400mm, this paper explores the hybrid effect between steel fiber and polypropylene fiber and impact on the fracture properties, such as critical effective crack length, critical crack tip opening displacement, effective stress intensity factors and fracture energy. The test results indicate that the addition of fiber is helpful to improve the fracture properties of concrete. Synergistic effect of two kinds of fibers is good, the steel fiber with high elastic module can restrain the cracking of concrete when the crack displacement is small, polypropylene macro-fiber with high ductility is more beneficial to increase the fracture properties of concrete than steel fiber when the crack displacement is big. The best fiber compounding can be gotten when the volume fractions of steel fiber and polypropylene fiber is respectively 0.5％and 1.0％in this experiment.

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Periodical:

Advanced Materials Research (Volumes 450-451)

Pages:

518-522

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.450-451.518

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Online since:

January 2012

Authors:

Yun Da Shao, Wen Feng Wang

Keywords:

Concrete, Fracture Energy, Hybrid Fiber, Stress Intensity Factor (SIF)

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