The four-point loading tests of polyvinyl alcohol fiber-reinforced recycled aggregate concrete (PVAF-RRAC) slabs are conducted and the impacts of reinforcement ratio ρs, content of PVA fiber ρf, span-thickness ratio l/h and replacement ratio of recycled coarse aggregate (RCA) γ on crack formation mechanism, crack spacing and crack width are analyzed. The failure modes of recycled aggregate concrete (RAC) slabs and PVAF-RRAC slabs are distinguished by yield of longitudinal tensile reinforcement and fragmentation of concrete in compression zone. Meanwhile, the damage of PVAF-RRAC slabs is also accompanied by pull-out or broken of PVA fibers along crack gaps. In contrast, the concrete crushing phenomenon of PVAF-RRAC slabs is not distinct, indicating PVA fibers incorporation could improve flexural performance. The average spacing and maximum crack width of PVAF-RRAC slabs are relatively small, the crack distribution is more uniform. The crack development rate and crack width decrease as ρf or ρs increases while they increase as γ or l/h increases. Considering the impact of ρf on average crack spacing, a formula for approximately forecasting the average crack spacing of PVAF-RRAC slabs is proposed. Additionally, an influence coefficient of RCA is introduced, a prediction model for crack width in PVAF-RRAC slabs is established and test data are validated with favorable results.


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    Titel :

    A Model for Predicting Crack Width of PVA Fiber-Reinforced Recycled Aggregate Concrete Slabs


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Yu, Feng (Autor:in) / Xie, Changfeng (Autor:in) / Fang, Yuan (Autor:in) / Song, Jie (Autor:in) / Xie, Honglei (Autor:in) / Zhang, Shijiang (Autor:in) / Song, Wenlong (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.12.2024


    Format / Umfang :

    18 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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