Direct shear behavior of cementitious mortar reinforced by carbon fiber textile

Dinh, Ngoc Hieu; Tran, Hai Van

doi:10.1016/j.conbuildmat.2020.118760

Cited by 23 publications

(7 citation statements)

References 28 publications

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“…It should be noted that in this study, the epoxy compound used for coating was achieved by mixing the bisphenol‐A‐type epoxy resin with a low viscosity of 700–1100 cps at 25°C and an amidoamine hardener (used as a curing agent) in the ratio 1:1, according to the manufacturer's specifications. The adopted weight of the epoxy resin was approximately 148 g/m 2 and that of both sand and Al 2 O 3 powder was approximately 672 g/m 2 13,36 …”

Section: Experimental Programmentioning

confidence: 99%

“…The adopted weight of the epoxy resin was approximately 148 g/m 2 and that of both sand and Al 2 O 3 powder was approximately 672 g/m 2 . 13,36 T A B L E 4 Properties of polyvinyl alcohol (PVA) fibers used in this study. In the PVA-E series, the effect of dispersed short fibers on the flexural and shear performances of the LW TRCC materials was examined with the fiber volume dosage as the main test variable.…”

Section: Specimen Details and Test Parametersmentioning

confidence: 99%

“…The shear test specimens, shown in Figure 6b, were fabricated in the form of rectangular prismatic shapes with a height, length, and thickness of 140, 300, and 60 mm, respectively. 36,37 Deep notches (5 mm) were performed at the vertical middle plane of the test specimens to induce cracking along the intended shear failure plane. The textile fabrics were located at the central plane of the test specimens such that the warp yarns were perpendicular to the shear plane.…”

Section: Specimen Details and Test Parametersmentioning

confidence: 99%

“…The shear tests were performed using the displacement control method with a constant velocity rate of 0.15 mm/min. 36,37 Load values were recorded using a load cell of capacity 100 kN.…”

Section: Test Setup and Measuring Apparatusmentioning

confidence: 99%

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Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Dinh

Pham

Kim

et al. 2023

Structural Concrete

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Textile‐reinforced cementitious composites (TRCCs) have recently received significant attention in structural engineering as promising retrofitting materials as well as reinforcements for thin and slender structural components. For applicability in the precast industry, the weight of the structural components made of TRCCs is a major concern. In this study, lightweight (LW) TRCC materials were developed and their flexural and direct shear performances were investigated. Carbon fabric is used as the textile reinforcement of the LW TRCCs, and expanded glass aggregates made from industrial refractory materials with fine particle sizes of 0.25–0.5 mm incorporating the mineral admixture (silica fume) are used to develop the LW cement‐based matrix. The main test series in this study include the expanded glass‐to‐binder (EG/B) ratio, surface coating methods used for textile fabrics, and volume dosages of short polyvinyl alcohol (PVA) fibers used to modify the cement‐based matrix. Three main series, including a total of 30 flexural test specimens and 30 shear test specimens, are fabricated and tested. The flexural behavior of LW TRCCs is investigated via four‐point bending tests and the direct shear behavior of LW TRCCs is investigated based on the FIP standard using one shear failure plane. The experimental results indicate that the EG/B ratio significantly affects the overall flexural and shear performances of LW TRCCs, wherein the use of higher EG/B ratios might lead to greater reduction in flexural properties as well as shear properties in the pre‐peak stage. The coating methods employed for fabric surface treatment via epoxy impregnation combined with rough layers are effective in enhancing flexural properties in terms of load and deformation capacity and shear properties in terms of peak stress compared with the counterpart using only the epoxy coating method. Additionally, incorporating short discrete PVA fibers within the LW cement‐based matrix results in outstanding performance due to improvement in bonding quality at the textile/matrix interface, which can be applied as a potential solution for fabricating LW, high‐performance TRCCs.

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Section: Experimental Programmentioning

confidence: 99%

Section: Specimen Details and Test Parametersmentioning

confidence: 99%

Section: Specimen Details and Test Parametersmentioning

confidence: 99%

“…The shear tests were performed using the displacement control method with a constant velocity rate of 0.15 mm/min. 36,37 Load values were recorded using a load cell of capacity 100 kN.…”

Section: Test Setup and Measuring Apparatusmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Dinh

Pham

Kim

et al. 2023

Structural Concrete

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“…The artificial neural network (ANN) method was used to model the flexural strength of TCC where concrete with carbon fiber fabric and short fibers was used to improve the initial crack and post crack load capacity [ 77 ]. Carbon fibers in the textile-reinforced mortar (TRM) affected its failure modes and the shear behavior, which was verified by a crack-shear slip model [ 78 ]. Textile concrete composite (TCC) was modeled using a discrete approach, whereby textiles and matrix were considered separately, or the mechanical responses of the material were averaged over the cross-section [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Angular Flexural Performance of Multiaxis Three Dimensional (3D) Polymeric Carbon Fiber/Cementitious Concretes

Özdemir

Bilişik

2021

Polymers

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Multiaxis three-dimensional (3D) continuous polymeric carbon fiber/cementitious concretes were introduced. Their angular (off-axis) flexural properties were experimentally studied. It was found that the placement of the continuous carbon fibers and their in-plane angular orientations in the pristine concrete noticeably influenced the angular flexural strength and the energy absorption behavior of the multiaxis 3D concrete composite. The off-axis flexural strength of the uniaxial (C-1D-(0°)), biaxial (C-2D-(0°), and C-2D-(90°)), and multiaxial (C-4D-(0°), C-4D-(+45°) and C-4D-(−45°)) concrete composites were outstandingly higher (from 36.84 to 272.43%) than the neat concrete. Their energy absorption capacities were superior compared to the neat concrete. Fractured four directional polymeric carbon fiber/cementitious matrix concretes limited brittle matrix failure and a broom-like fracture phenomenon on the filament bundles, filament-matrix debonding and splitting, and minor filament entanglement. Multiaxis 3D polymeric carbon fiber concrete, especially the C-4D structure, controlled the crack phenomena and was considered a damage-tolerant material compared to the neat concrete.

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