Pull-out response of glass yarn from ettringite matrix: Effect of pre-impregnation and embedded length

Homoro, Omayma; Michel, Marie; Baranger, Thouraya

doi:10.1016/j.compscitech.2018.11.045

Cited by 28 publications

(8 citation statements)

References 15 publications

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“…Experimentally, to date, no study has investigated the direct local measurement of interface stress. Research has shown that, in addition to the reinforcement and matrix, textile preimpregnation influences the behaviour at the interface, stating that the global behaviour of TRCMCs is improved by preimpregnating the reinforcement [20][21][22]. Similarly, for other parameters influencing the behaviour of TRCMCs, their quantification is limited to classical experimental measurements of the displacement or strain field on the surface of a specimen.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of the tensile behaviour of textile reinforced cementitious matrix composites using distributed fibre optic sensing (DFOS) technology

Saïdi

Gabor

2020

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of the tensile behaviour of textile reinforced cementitious matrix composites using distributed fibre optic sensing (DFOS) technology

Saïdi

Gabor

2020

Construction and Building Materials

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“…As described in the literature, 8,23 the pull-out failure of a multifilament yarn embedded in a cementitious matrix is characterized by the formation of two groups of filaments with distinct behaviour, according to their impregnation degree: outer filaments of the yarn that are well impregnated by the matrix fail in tension and filaments of the core of the yarn that are not impregnated enough by the matrix, and can slip and be extracted from the embedded length.…”

Section: Methodsmentioning

confidence: 99%

Study of the pull-out test of multifilament yarns embedded in cementitious matrix

Slama

Gallias

Fiorio

2020

Journal of Composite Materials

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In order to understand the impregnation mechanism of a yarn by a cementitious matrix and its influence on the mechanical properties of a yarn/cement composite, pull-out tests have been performed on samples of yarn/cement. Two embedded lengths for the yarn and different rheological and mechanical properties for the matrix were tested. Two pull-out modes were distinguished according to the compressive strength of matrices. For matrices with a compressive strength between 60 and 70 MPa the pull-out mode is characterized by a behaviour close to the tensile behaviour of the yarn, with maximum load values reaching approximately 60% of the tensile maximum load because of filaments damages. For matrices with compressive strength inferior to 60 MPa, the pull-out mode exhibits a residual phase linked to a slippage and an extraction of a variable number of filaments, with lower maximum load values than the first pull-out mode. After pull-out test, for some samples with filaments extraction, an innovative method based on a double impregnation with resin enables to visualize the yarn/matrix interface and identify the level of impregnation of the filaments by using confocal microscopy. It is concluded that this level of impregnation has a direct influence on the mechanical behaviour of the embedded yarn, except for the slippage and extraction phase, but the rheological properties of the matrix has no significant influence on this impregnation.

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“…39,45 These failure modes significantly depend on the type of fabrics, textile-cement matrix bond, and the method of specimen gripping in the machine jaws. 43,46 Several factors can influence the mechanical behavior of FRCM composites, including the fabric volume fraction, 39,40,47 adhesion between fibers and cement matrix, 40,46,48 anchorage ability of the fabrics, 17,39 physical and mechanical properties of the fibers, 39,49,50 fabric geometry, 39,51 fiber arrangement, 39 pre-impregnation of the textile, 40,52 bonded length of metallic tabs, 53 chemical composition of the cement matrix, 42,54 curing conditions and the early-age behavior of the cement matrix. 55,56 Each of the factors listed above has an influence on the mechanical behavior of FRCM, with fabric-related properties such as the fabric volume fraction, the anchorage ability of the fabric, and the adhesion between the fabric and the cement matrix, have a particularly significant effect on the mechanical properties of the FRCM composite.…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement ratio and textile pre-impregnation on the mechanical properties of flax textile reinforced sulfoaluminate matrix

Bardouh,

Homoro,

Amziane

2023

Journal of Composite Materials

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This study evaluates the effect of reinforcement ratio and textile pre-impregnation on the tensile behavior of flax textile, embedded in an inorganic CSA matrix (sulfoaluminate cementitious matrix), known as Fabric Reinforced Cementitious Matrix (FRCM). Two reinforcement ratios of (3 and 6%) and two impregnation techniques (polymeric and mineral) are applied. Direct tensile tests are conducted on FRCM specimens as well as on bare flax textiles featuring three configurations: NP (non-impregnated), PP (polymeric-impregnated), and PM (mineral-impregnated), between 1L (one layer) and 2L (two layers) of flax textile. The results show a direct correlation between the reinforcement ratio and the enhancement of mechanical properties, with a notable 44% increase in mechanical strength observed for NP FRCM specimens between 1L and 2L of flax textile. Mineral pre-impregnation enhances yarn-cement matrix bonding inside FRCM, while FRCM specimens with polymeric-impregnated textiles have limited influence on the mechanical properties due to premature failure. Polymeric impregnation has a pronounced effect when applied to bare flax textiles, with PP flax textiles demonstrating exceptional mechanical strength and rigidity, reaching up to 480 MPa and 37 GPa, respectively. In contrast, this effect was mitigated when employing PP textiles in FRCM specimens, where the lowest fabric efficiency reached 12% for the 2L.PP configuration suggests significant chemical incompatibility between epoxy resin and CSA matrix. Mineral-impregnated specimens display consistent efficiency regardless of reinforcement ratio, suggesting a novel and homogeneous distribution of cement matrix particles within the yarns of textiles. Two distinct failure modes of FRCM are observed in this study, a delamination for PP configurations and a fiber pullout for NP and PM configurations. No effect of reinforcement ratio is remarked on the failure mode. The cracking mode in PM FRCM configurations showcased improved aesthetics, durability, and elongation after rupture (6.28%). As a result, 2L.PM FRCM is the best configuration in terms of mechanical strength, rigidity, ductility, and durability.

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Pull-out response of glass yarn from ettringite matrix: Effect of pre-impregnation and embedded length

Cited by 28 publications

References 15 publications

Experimental analysis of the tensile behaviour of textile reinforced cementitious matrix composites using distributed fibre optic sensing (DFOS) technology

Experimental analysis of the tensile behaviour of textile reinforced cementitious matrix composites using distributed fibre optic sensing (DFOS) technology

Study of the pull-out test of multifilament yarns embedded in cementitious matrix

Effect of reinforcement ratio and textile pre-impregnation on the mechanical properties of flax textile reinforced sulfoaluminate matrix

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