Preparation and Dynamic Performance of Basalt Fiber–Reinforced Lightweight Concrete Confined by Brass Strip
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 9
Abstract
This paper aims to develop a new material with outstanding energy-absorbing performance regarding its application in protection engineering. The preparation and dynamic performance of basalt fiber–reinforced lightweight concrete confined by a brass strip (FLCB) were experimentally investigated. The FLCB specimens were first prepared based on dense packing theory. Impact compression experiments were then carried out by a ( = diameter) split Hopkinson pressure bar apparatus, which was improved by the pulse-shaping technique. The resulting stress-strain curve, dynamic deformation, and energy-absorbing characteristics were studied. The results show that FLCB, with density of , is a kind of lightweight concrete. The stress-strain curve of FLCB can be divided into three stages: linear elastic, stress platform, and brittle failure. The stress platform stage has a significant effect on the improvement of energy-absorbing performance, and the percentage of the stress platform to the whole curve increases continuously with average strain rate. Both the ultimate strain and the energy-absorbing index are sensitive to strain rate and increase continuously with average strain rate. Furthermore, compared with conventional concrete, the production of FLCB is associated with a higher ultimate strain and energy-absorbing index, and the tendency becomes more obvious with increasing average strain rate. Therefore, FLCB includes a lightweight concrete with excellent energy-absorbing performance and this performance shows clear strain-rate dependence. Due to its features of outstanding energy absorption and low density, FLCB has a promising future to be used as antiexplosive layers in protection engineering.
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Acknowledgments
The authors are grateful for support from the Industrial Public Relation Project for Science and Technology Development in Shaanxi Province of China (2014k10-15); the Fund of the State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact (PLA University of Science and Technology) (DPMEIKF201406); and Projects of Youth Technology New Star of Shaanxi Province in China (2013KJXX-81).
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Oct 18, 2016
Accepted: Feb 9, 2017
Published online: May 15, 2017
Published in print: Sep 1, 2017
Discussion open until: Oct 15, 2017
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