<p>Following the successful application of Roller-Compacted Concrete (RCC) in mass structures such as dams, and considering its advantages including high early-age strength, reduced construction costs, and accelerated construction speed, attention has shifted towards its use in applications like pavements, leading to extensive research in this field. Reinforcing roller-compacted concrete with conventional rebar is not feasible due to its specific placement method. Consequently, researchers have sought methods to enhance its ductility and flexural strength. One such practical approach is the inclusion of steel fibers as a component of the mix design. Through their investigations, they concluded that while steel fibers significantly increase ductility, they have a negligible effect on the modulus of rupture. Given that the behavior of steel fibers in concrete is unpredictable, providing only partial reinforcement, and that the placement of such concrete present unique challenges, the pursuit of a more effective method is imperative. This study investigates the feasibility of producing Textile Reinforced Concrete (TRC) composites in such a way that they can be placed and compacted together with roller-compacted concrete pavement. To maintain compatibility with RCC construction methods, the cementitious matrix was formulated to be roller-compactable and to exhibit a zero-slump consistency. To clarify the yarn impregnation process within the zero-slump matrix and its consequent effect on the composite’s mechanical response, a series of pull-out experiments was performed. The experimental program systematically evaluated the effects of three embedment lengths for two distinct yarn types, as well as the incorporation of microsilica across four different matrix formulations, with the resulting impacts comprehensively analyzed and discussed.</p>

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Investigating the feasibility of making textile reinforced roller-compacted mortar: Based on the pull-out response

  • Saeid Nowroozi,
  • Ali Sadrmomtazi,
  • Majid Malekzadeh

摘要

Following the successful application of Roller-Compacted Concrete (RCC) in mass structures such as dams, and considering its advantages including high early-age strength, reduced construction costs, and accelerated construction speed, attention has shifted towards its use in applications like pavements, leading to extensive research in this field. Reinforcing roller-compacted concrete with conventional rebar is not feasible due to its specific placement method. Consequently, researchers have sought methods to enhance its ductility and flexural strength. One such practical approach is the inclusion of steel fibers as a component of the mix design. Through their investigations, they concluded that while steel fibers significantly increase ductility, they have a negligible effect on the modulus of rupture. Given that the behavior of steel fibers in concrete is unpredictable, providing only partial reinforcement, and that the placement of such concrete present unique challenges, the pursuit of a more effective method is imperative. This study investigates the feasibility of producing Textile Reinforced Concrete (TRC) composites in such a way that they can be placed and compacted together with roller-compacted concrete pavement. To maintain compatibility with RCC construction methods, the cementitious matrix was formulated to be roller-compactable and to exhibit a zero-slump consistency. To clarify the yarn impregnation process within the zero-slump matrix and its consequent effect on the composite’s mechanical response, a series of pull-out experiments was performed. The experimental program systematically evaluated the effects of three embedment lengths for two distinct yarn types, as well as the incorporation of microsilica across four different matrix formulations, with the resulting impacts comprehensively analyzed and discussed.