期刊
JOURNAL OF COMPOSITES SCIENCE
卷 5, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/jcs5100283
关键词
ultra-high-performance concrete (UHPC); strain-hardening cementitious composites (SHCC); synthetic fiber; polyethylene fiber; tensile behavior
资金
- Hong Kong Research Grants Council-Theme-based Research Scheme [T22-502/18-R]
- Research Institute for Sustainable Urban Development The Hong Kong Polytechnic University [1-BBWE]
- Hong Kong Innovation and Technology Fund through the Research Talent Hub [ITS/077/18FX]
This paper summarizes recent advances in strain-hardening ultra-high-performance concretes (UHPC) with synthetic fibers, focusing on their tensile properties. Compared to UHPC with steel fibers, strain-hardening UHPC with synthetic fibers generally exhibit higher tensile ductility and lower compressive strength.
This paper summarizes recent advances in strain-hardening ultra-high-performance concretes (UHPC) with synthetic fibers, with emphasis on their tensile properties. The composites described here usually contain about 2.0% high-density polyethylene (PE) fibers. Compared to UHPC with steel fibers, strain-hardening UHPC with synthetic fibers generally show a higher tensile ductility, lower modulus in the cracked state, and relatively lower compressive strength. The tensile strain capacity of strain-hardening UHPC with synthetic fibers increases with increasing tensile strength. The f'(c)f(t)epsilon(t)/w index (compressive strength x tensile strength x tensile strain capacity / tensile crack width) is used to compare the overall performance of strain-hardening UHPC. Moreover, a probabilistic approach is applied to model the crack width distributions of strain-hardening UHPC, and estimate the critical tensile strain in practical applications, given a specific crack width limit and cumulative probability. Recent development on strain-hardening UHPC with the use of seawater, sea-sand and PE fibers are also presented.
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