Effect of fiber content on mechanical performance and cracking characteristics of ultra-high-performance seawater sea-sand concrete (UHP-SSC)

Bo Tao Huang, Yu Tian Wang, Jia Qi Wu, Jing Yu, Jian Guo Dai, Christopher K.Y. Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Developing seawater sea-sand concrete can address the challenges arising from the lack of freshwater and river/manufactured sand for making concrete on-site for sustainable marine and coastal construction. To eliminate the corrosion risk of steel fibers while maintaining the high ductility of concrete, this study aims to develop a new type of ultra-high-performance seawater sea-sand concrete (UHP-SSC) by using ultra-high-molecular-weight polyethylene fibers. The effect of fiber content (0%, 0.5%, 1.0%, and 1.5% by volume) on the mechanical performance and cracking characteristics of UHP-SSC was experimentally investigated. The results showed that as the fiber content increases, the tensile strength and strain capacity of UHP-SSC significantly increase, while the compressive strength slightly decreases (but still over 130 MPa). The stochastic nature of the crack width was characterized by the Weibull distribution. A probabilistic model was used to model the evolution of the crack width for UHP-SSC at different strain levels. The model showed good agreement with the experimental results, and it can be used to estimate the allowed tensile strain of UHP-SSC in practical applications for a given limit of crack width and cumulative probability. The findings in this study provide insights into the future design of UHP-SSC in marine and coastal applications.

Original languageEnglish
JournalAdvances in Structural Engineering
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • cracking characteristics
  • fiber reinforcement
  • mechanical performance
  • probabilistic modeling
  • sea-sand
  • seawater
  • ultra-high-performance concrete (UHPC)
  • Weibull distribution

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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