Experimental and Analytical Studies on Fracture Behavior of Fiber-Reinforced Structural Lightweight Aggregate Concrete
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 5
Abstract
This study presents the fracture behavior of synthetic fiber-reinforced structural lightweight aggregate concrete (SynFR-SLWAC) by experimental and analytical studies. Experimental studies include testing of 15 specimens for understanding mode-1 fracture response. Analytical studies include developing multilinear stress-crack width relations through inverse analysis. SynFR-SLWAC is made using sintered fly ash aggregate (SFA) with varying volume fractions of monofilament macro synthetic (0.2%, 0.4%, and 0.6%) and a small fraction of micro synthetic fibers (0.02%). The effect of synthetic fiber addition on the crack arresting mechanisms of SynFR-SLWAC is studied using the digital image correlation (DIC) technique. The stress-crack width relations are obtained from the experimental load-crack mouth opening displacement (CMOD) curves using inverse analysis. Additionally, empirical equations are proposed for predicting the stress-crack width relationship for SynFR-SLWAC with different fiber volume fractions. Fracture energy increased significantly with an increase in fiber volume dosage at larger values of crack width. Hinge width of SynFR-SLWAC reduced when compared to normal density concrete made of natural coarse aggregates.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research work was sponsored by “IMPRINT Scheme- Order # IMP/2018/000846” funded by Ministry of Human Resource Development and Department of Science and Technology, India. The authors would like to thank the funding agency for their generous support.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 5 • May 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 19, 2020
Accepted: Sep 18, 2020
Published online: Feb 26, 2021
Published in print: May 1, 2021
Discussion open until: Jul 26, 2021
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