Direct shear behavior after elevated temperature exposure of epoxy-coated carbon textile-reinforced mortar (TRM) modified with different types of microfibers

Dinh, Ngoc Hieu; Tran, Hai Van

doi:10.1617/s11527-021-01748-0

Cited by 2 publications

(5 citation statements)

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“…During the shear tests, the vertical deformation of the shear plane (crack slip) was measured by using a vertical LVDT, and the horizontal deformation of the shear plane (crack width) was measured by using a pair of horizontal LVDTs, that were mounted on the specimens via the system of light aluminum frames, as shown in Figure 8b. 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: Experimental Programmentioning

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%

“…As shown in Figure 8a, the flexural setup of the TRCC specimens followed that of the four‐point bending test. Flexural tests were performed using the displacement control method with a constant velocity rate of 1 mm/min 37 . The mid‐span deflection during the test was recorded and averaged using two vertical linear variable differential transformers (LVDTs).…”

Section: Experimental Programmentioning

confidence: 99%

“…Flexural tests were performed using the displacement control method with a constant velocity rate of 1 mm/min. 37 The mid-span deflection during the test was recorded and averaged using two vertical linear variable differential transformers (LVDTs). The load values were recorded during flexural tests using a load cell of capacity 50 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%

“…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%

Section: Experimental Programmentioning

confidence: 99%

Section: Test Setup and Measuring Apparatusmentioning

confidence: 99%

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