Low-velocity flexural impact response of fiber-reinforced aerated concrete

Impact response of fiber-reinforced aerated concrete was investigated under a three-point bending configuration based on free-fall of an instrumented impact device. Two types of aerated concrete: plain autoclaved aerated concrete (AAC) and polymeric fiber-reinforced aerated concrete (FRAC) were test...

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Bibliographic Details
Published in:Cement & concrete composites 2014-05, Vol.49, p.100-110
Main Authors: Dey, V., Bonakdar, A., Mobasher, B.
Format: Article
Language:English
Subjects:
Aerated
Aerated concrete
Cements
Concretes
Devices
Fiber composites
Fiber-reinforced concrete
Flexural strength
Impact
Impact response
Instrumentation
Modulus of rupture in bending
Stiffness
Toughness
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Summary:Impact response of fiber-reinforced aerated concrete was investigated under a three-point bending configuration based on free-fall of an instrumented impact device. Two types of aerated concrete: plain autoclaved aerated concrete (AAC) and polymeric fiber-reinforced aerated concrete (FRAC) were tested. Comparisons were made in terms of stiffness, flexural strength, deformation capacity and energy absorption capacity. The effect of impact energy on the mechanical properties was investigated for various drop heights and different specimen sizes. It was observed that dynamic flexural strength under impact was more than 1.5 times higher than the static flexural strength. Both materials showed similar flexural load carrying capacity under impact, however, use of 0.5% volume fraction of polypropylene fibers resulted in more than three times higher flexural toughness. The performed instrumented impact test was found to be a good method for quantifying the impact resistance of cement-based materials such as aerated concrete masonry products.
ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2013.12.006