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author:

Xue, J. (Xue, J..) [1] (Scholars:薛俊青) | Mao, S. (Mao, S..) [2] | Cacciola, P. (Cacciola, P..) [3] | Contento, A. (Contento, A..) [4] | Lampropoulos, A. (Lampropoulos, A..) [5] | Nicolaides, D. (Nicolaides, D..) [6] | Petrou, M.F. (Petrou, M.F..) [7] | Yang, Z. (Yang, Z..) [8] (Scholars:杨政险) | Briseghella, B. (Briseghella, B..) [9] (Scholars:BRUNO BRISEGHLLA)

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Scopus

Abstract:

The effectiveness of the use of fibers in Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) can be limited by their random orientation in the cementitious matrix. Oriented steel fibers, on the other hand, show significant promise in enhancing the tensile and flexural properties of UHPFRC specimens when the principal tensile stresses predominantly align in a single direction. Despite various proposed methods for orienting steel fibers in UHPFRC, their comparative impact on mechanical properties remained unclear. To bridge this gap, three different strategies were examined in this study, namely: i) chute with vibration table, ii) L-shaped device, and iii) electromagnetic field with vibration table, aiming at controlling the steel fibers orientation in UHPFRC specimens. Uniaxial tensile, four-point flexural, and compressive tests were conducted to examine the influence of different orientation methods on mechanical properties. The experimental findings revealed that compared to randomly oriented fibers, oriented steel fiber UHPFRC had superior tensile, flexural, and compressive strength. Additionally, fiber orientation led to improved consistency of the UHPFRC properties as well as thinner, more densely distributed cracks, regular fracture surfaces, and lower elastic modulus and Poisson's ratio. Electromagnetic field orientation proved to be the most effective orientation method, L-shaped device method the least effective due to heightened fluidity demands in the mixture, and the chute with vibration method ranked in between. This research represents a thorough investigation into the comparative efficacy of different methods for orienting steel fibers in UHPFRC, shedding new light on the optimal approach to enhance mechanical properties. © 2024 Elsevier Ltd

Keyword:

Four-point flexural test Mechanical property Orientation Steel fiber Ultra-high performance fiber reinforced concrete Uniaxial tensile test

Community:

  • [ 1 ] [Xue J.]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 2 ] [Xue J.]Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 3 ] [Xue J.]Joint International Research Laboratory of Deterioration and Control of Coastal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 4 ] [Mao S.]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 5 ] [Cacciola P.]School of Architecture, Technology and Engineering, University of Brighton, Brighton, United Kingdom
  • [ 6 ] [Contento A.]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 7 ] [Contento A.]Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 8 ] [Contento A.]Joint International Research Laboratory of Deterioration and Control of Coastal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 9 ] [Lampropoulos A.]Laboratory of Reinforced Concrete, Faculty of Civil Engineering, National Technical University of Athens, Athens, Greece
  • [ 10 ] [Nicolaides D.]Department of Civil Engineering, Frederick University, Nicosia, Cyprus
  • [ 11 ] [Petrou M.F.]Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus
  • [ 12 ] [Yang Z.]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 13 ] [Yang Z.]Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 14 ] [Yang Z.]Joint International Research Laboratory of Deterioration and Control of Coastal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 15 ] [Briseghella B.]College of Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 16 ] [Briseghella B.]Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering, Fuzhou University, Fuzhou, China
  • [ 17 ] [Briseghella B.]Joint International Research Laboratory of Deterioration and Control of Coastal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou, China

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Source :

Construction and Building Materials

ISSN: 0950-0618

Year: 2024

Volume: 448

7 . 4 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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