Flexural toughness of extruded fiber-reinforced mortar with preferentially aligned fibers

被引:4
作者
Alarrak, Rashed [1 ,2 ]
Jeon, Byeonguk [1 ]
Brand, Alexander S. [1 ,3 ]
机构
[1] Virginia Polytech Inst & State Univ, Charles E Via Jr Dept Civil & Environm Engn, Blacksburg, VA 24061 USA
[2] Kuwait Univ, Dept Civil Engn, Kuwait, Kuwait
[3] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
关键词
Fiber-reinforced concrete; Flexural toughness; Digital image correlation; Extrusion; Fiber alignment; Crack propagation; Strain localization; DIGITAL IMAGE CORRELATION; CEMENTITIOUS COMPOSITES; MECHANICAL PERFORMANCE; SPATIAL-DISTRIBUTION; ACOUSTIC-EMISSION; CONCRETE; ORIENTATION; BEHAVIOR; EXTRUSION; FRESH;
D O I
10.1016/j.conbuildmat.2023.133528
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This study explored the flexural toughness properties of polyvinyl alcohol (PVA) fiber-reinforced concrete (FRC) using a modified ASTM C1609 third-point bending test, and it established a comparative study between two methods of casting: traditional casting and pump-driven extrusion. The primary hypothesis posited that the extrusion process would promote fiber alignment parallel to the tensile stresses, thereby enhancing the flexural performance of the concrete. The study corroborated previous research findings that introducing fibers enhances the ductility and post-peak performance of the concrete. Moreover, this research introduced a unique observation that strategic fiber alignment through extrusion could serve to further enhance the concrete's flexural performance. The research employed digital image correlation to capture the full displacement field during testing, facilitating an examination of the crack propagation process and strain localization. The findings showed that the extrusion-based casting method improved the residual strengths by an average of 39% and 87% compared to conventional cast method for the 0.5% and 1% fiber volume specimens, respectively. Additionally, the base of the extruded specimens exhibited a greater incidence of crack initiation and displayed enhanced energy absorption through multiple cracking events. These observations underscore the concept that fiber alignment, when facilitated by extrusion, plays a significant role in influencing crack propagation and, consequently, in improving the flexural properties of the composite material.
引用
收藏
页数:17
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共 57 条
  • [1] Influence of fibre orientation on the tensile behaviour of ultra-high performance fibre reinforced cementitious composites
    Abrishambaf, Amin
    Pimentel, Mario
    Nunes, Sandra
    [J]. CEMENT AND CONCRETE RESEARCH, 2017, 97 : 28 - 40
  • [2] Characterization of mechanical performance of concrete beams with external reinforcement by acoustic emission and digital image correlation
    Aggelis, D. G.
    Verbruggen, S.
    Tsangouri, E.
    Tysmans, T.
    Van Hemelrijck, D.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2013, 47 : 1037 - 1045
  • [3] Spatial distribution of aligned short fibers in cement composites
    Akkaya, Y
    Picka, J
    Shah, SP
    [J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2000, 12 (03) : 272 - 279
  • [5] Fracture examination in concrete through combined digital image correlation and acoustic emission techniques
    Alam, Syed Yasir
    Saliba, Jacqueline
    Loukili, Ahmed
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2014, 69 : 232 - 242
  • [6] Fracture properties of extruded fiber-reinforced mortar with preferentially aligned fibers
    Alarrak, Rashed
    Jeon, Byeonguk
    Brand, Alexander S.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2023, 403
  • [7] Bentur A, 2006, Fibre reinforced cementitious composites, DOI DOI 10.1016/0010-4361(79)90446-4
  • [8] Spatial distribution of synthetic fibers in concrete with X-ray computed tomography
    Bordelon, Amanda C.
    Roesler, Jeffery R.
    [J]. CEMENT & CONCRETE COMPOSITES, 2014, 53 : 35 - 43
  • [9] Flexural behavior of HPFRCC: Enhancing post-crack strength and toughness by magnetic alignment of the reinforcement
    Brito, Igor da Silva
    Strauss Rambo, Dimas Alan
    Martini, Sandro
    Salvador, Renan Picolo
    de Menezes Freitas, Marcos Fabrizio
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2021, 269 (269)
  • [10] Influence of Fiber Distribution and Orientation in the Fracture Behavior of Polyolefin Fiber-Reinforced Concrete
    Enfedaque, Alejandro
    Alberti, Marcos G.
    Galvez, Jaime C.
    [J]. MATERIALS, 2019, 12 (02):