Evaluation of Shrinkage and Fracture Properties of Internal Cured 100-MPa Ultrahigh-Strength Steel Fiber–Reinforced Concrete
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 11
Abstract
In this paper, shrinkage and fracture properties of 100-MPa ultrahigh-strength steel fiber-reinforced concrete internally cured with presoaked lightweight aggregate (PSLWA) are evaluated through shrinkage and bending tests. The results show that by using PSLWA to partially replace normal-weight aggregates, the shrinkage at 28 days after casting under sealed and dry conditions can be reduced from 600.7 to and from 706.6 to , respectively. However, the introduction of lightweight aggregate (LWA) will lead to reduction of cracking, tensile, and flexural strength even with less negative impact on compressive strength. Adding steel fiber into the high-strength concrete can significantly improve fracture performance of the concrete even at 1% in volume content. These improvements present as increases in displacement at bending peak and in fracture energy determined from their stress-crack opening relationship.
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Acknowledgments
This work was supported by grants from the National Science Foundation of China (Nos. 51178248 and 51678342) to Tsinghua University.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 11 • November 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 30, 2016
Accepted: May 17, 2017
Published online: Aug 19, 2017
Published in print: Nov 1, 2017
Discussion open until: Jan 19, 2018
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