Direct Tensile Properties and Stress–Strain Model of UHP-ECC
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 1
Abstract
This research developed an ultra-high-performance engineered cementitious composite (UHP-ECC), which combines the properties of strain-hardening, multiple cracking, and high mechanical strength. The compressive strength of the UHP-ECC reached 150 MPa at 28 days under standard curing conditions, whereas the tensile strength and strain capacity of the UHP-ECC were 18 MPa and 8%, respectively. Different fiber volumetric ratios and geometries (fiber length and diameter) were used to investigate the influences of fiber-reinforcement parameters on the mechanical and crack-pattern properties of UHP-ECC, including the tensile strength, strain capacity, strain energy, crack number, and crack spacing. It was found that the fiber reinforcement parameters significantly influence both the mechanical properties and crack-patterns of UHP-ECC. Based on the test results, a bilinear tensile stress–strain model was proposed for UHP-ECC and its accuracy was demonstrated through comparisons with the test results.
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Acknowledgments
The authors appreciate the financial support from the National Natural Science Foundation of China (51478406 and 51278441), the Research Grants Council of the Hong Kong SAR (Project Code: 152145/17E), and the Research Institute for Sustainable Urban Development, Hong Kong Polytechnic University through Project 1-BBWE.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 29, 2018
Accepted: Jun 17, 2019
Published online: Oct 31, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 31, 2020
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