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Testing and Prediction of Shear Performance for Steel Fiber Reinforced Expanded-Shale Lightweight Concrete Beams without Web Reinforcements

1
International Joint Research Lab for Eco-building Materials and Engineering of Henan, North China University of Water Resources and Electric Power, Huanyuan Campus, No. 36 Beihuan Road, Zhengzhou 450045, China
2
Henan Provincial Collaborative Innovation Center for Water Resources High-efficient Utilization and Support Engineering, No. 136 Jinshui East Road, Zhengzhou 450046, China
3
School of Engineering, RMIT University, Melbourne, VIC 3003, Australia
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(10), 1594; https://doi.org/10.3390/ma12101594
Received: 13 April 2019 / Revised: 10 May 2019 / Accepted: 14 May 2019 / Published: 15 May 2019
(This article belongs to the Special Issue Advances in Lightweight Aggregate Concrete)
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Abstract

In this paper, for a wide application of high-performance steel fiber reinforced expanded-shale lightweight concrete (SFRELC) in structures, the shear behavior of reinforced SFRELC beams without web reinforcements was experimentally investigated under a four-point bending test. Twenty-six beams were fabricated considering the influencing parameters of SFRELC strength, shear-span to depth ratio, longitudinal reinforcement ratio and the volume fraction of the steel fiber. The statistical analyses based on the foundational design principles and the experimental results are made based on the shear cracking resistance, the shear crack distribution and width, the mid-span deflection, the patterns of shear failure, and the shear capacity of the specimens. This confirms the effective strengthening of steel fibers on the shear performance of reinforced SFRELC beams without web reinforcements. Based on the modifications to the formulas of reinforced conventional concrete, lightweight-aggregate concrete or steel fiber reinforced concrete (SFRC) beams, and the validation against the experimental findings, formulas are proposed for the prediction of shear cracking resistance and shear capacity of reinforced SFRELC beams without web reinforcements. Finally, formulas are discussed for the reliable design of the shear capacity of reinforced SFRELC beams without web reinforcements. View Full-Text
Keywords: steel fiber reinforced expanded-shale lightweight concrete (SFRELC); reinforced SFRELC beam; shear cracking resistance; shear capacity; shear-span to depth ratio; volume fraction of steel fiber; longitudinal reinforcement ratio; SFRELC strength; prediction formulas steel fiber reinforced expanded-shale lightweight concrete (SFRELC); reinforced SFRELC beam; shear cracking resistance; shear capacity; shear-span to depth ratio; volume fraction of steel fiber; longitudinal reinforcement ratio; SFRELC strength; prediction formulas
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, X.; Li, C.; Zhao, M.; Yang, H.; Zhou, S. Testing and Prediction of Shear Performance for Steel Fiber Reinforced Expanded-Shale Lightweight Concrete Beams without Web Reinforcements. Materials 2019, 12, 1594.

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