Direct Tensile Properties and Stress-Strain Model of UHP-ECC

Ke Quan Yu, Zhou Dao Lu, Jian Guo Dai*, Surendra P. Shah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

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.

Original languageEnglish (US)
Article number04019334
JournalJournal of Materials in Civil Engineering
Volume32
Issue number1
DOIs
StatePublished - Jan 1 2020

Keywords

  • Crack-pattern
  • Fiber reinforcement
  • Stress-strain model
  • Tensile property
  • Ultrahigh-performance engineered cementitious composite (UHP-ECC)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

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