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Title: The Effects of Impact Loading on the Flexural Strength of Fibre Reinforced Concrete
Authors: Murali, G
Ramkumar, V R
Karthikeyan, K
Keywords: Impact Load;Flexural Strength;Steel Fibre;Concrete
Issue Date: Dec-2017
Publisher: NISCAIR-CSIR, India
Abstract: The research work presented in this paper focused on the experimental investigation of loss in flexural strength of fibre reinforced concrete (FRC) exposed to various levels of impact loading. For this purpose, a total of 210 (100 x 100 x 500 mm) specimens were cast using hooked end steel fibres with varying aspect ratios of 50, 65, and 80 at different volume fractions of 0.5, 1.0 and 1.5%. As per the guidelines of ACI Committee 544, Drop-weight test was performed on a 28 days cured specimen in order to identify the loss in flexural strength due to the effect of impact loading. The specimens were exposed to different levels of impact loads such as 15, 25, 35, 45, and 55% of their impact failure energy. In addition, a multiple linear regression model was developed using the experimental test results to predict the percentage loss in flexural strength due to the effect of various levels of impact load. The results displayed that as the volume fraction and aspect ratio of fiber was increased, the impact resistance of concrete was also increased while the losses in flexural strength were decreased.
Page(s): 790-794
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.76(12) [December 2017]

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