Journal
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
Volume 32, Issue 1, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)MT.1943-5533.0002975
Keywords
Ultrahigh-performance engineered cementitious composite (UHP-ECC); Fiber reinforcement; Tensile property; Crack-pattern; Stress-strain model
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Funding
- National Natural Science Foundation of China [51478406, 51278441]
- Research Grants Council of the Hong Kong SAR [152145/17E]
- Research Institute for Sustainable Urban Development, Hong Kong Polytechnic University [1-BBWE]
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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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