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Loss of mechanical properties of fiber-reinforced concrete exposed to impact load [Reducerea proprietăților mecanice ale betonului armat dispers cu fibre la solicitări de impact]
Published in Procema SA
Volume: 46
Issue: 4
Pages: 491 - 496
The aim of the study is to investigate the loss of mechanical properties such as compressive and splitting tensile strength of fiber-reinforced concrete (FRC) when exposed to impact load. Two different steel fibers i.e. hooked end and crimped end having the length of 50 mm and an aspect ratio of 50 were used as reinforcing materials in 0.5%, 1.0% and 1.5% volumes with a water-binder ratio of 0.42. The American concrete institute (ACI) committee 544 drop weight test was performed on 28 days cured cylinders, in order to determine the impact failure energy. In order to identify the loss of compressive and splitting tensile strength due to the effect of impact, another set of samples were prepared from the same concrete mixtures and exposed to impact loads of 25%, 40%, and 55% of their impact failure energy. Based on the results obtained from the experimental work, multivariate linear regression (MLR) models were developed using SPSS software to predict the percentage loss of compressive and splitting tensile strength due to the effect of impact load and the validity of the proposed model were verified with the test data of an earlier research. The results showed that the loss of compressive and splitting tensile strength in FRC significantly decreased compared with concrete without fiber, when exposed to impact loads. The results of the proposed model provided good agreement with the experimental results. © 2016, Procema SA. All rights reserved.
About the journal
JournalRevista Romana de Materiale/ Romanian Journal of Materials
PublisherProcema SA