Improvement of the mechanical properties of a glass multifilament yarn reinforced ettringitic matrix using an innovative pre-impregnation process

Homoro, Omayma; Michel, Marie; Baranger, Thouraya

doi:10.1080/19648189.2020.1744038

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…Indeed, the reduction of the mechanical performance of FRCM composites exposed to temperature over 80 • C was reported for epoxy pre-impregnated carbon fabrics [68]. In order to overcome this issue, some studies propose the application of inorganic coatings instead of polymer based coatings [63,[70][71][72][73][74][75][76][77][78]. Weichold at al.…”

Section: Inorganic Coatingsmentioning

confidence: 99%

“…Although in general the increase of the pull-out load was lower compared to fibers coated with the cement/PVAc coating, the replacement of Portland cement with silica leads to a 1.6-fold increase in the residual tensile strength of the composite. Homoro et al proposed a dry process for the pre-impregnation of glass yarn with inorganic powder, which makes use of a high-intensity alternating electrostatic field to facilitate the penetration of the powder into the yarn [70]. The process consists of passing the yarn covered with the powder between two electrodes where a strong alternative electrostatic field is created by applying high tension.…”

Section: Inorganic Coatingsmentioning

confidence: 99%

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Surface Modification of Glass Textile for the Reinforcement of a Cement-Based Composite: A Review

Bompadre

Donnini

2021

Applied Sciences

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The mechanical properties of cement-based composites reinforced with glass textile are strongly affected by the low ability of the inorganic matrix to penetrate within the single filaments, and by the low durability of the fibers in an alkaline environment. Over the last decades, different studies have investigated the possibility to improve the mechanical properties and the durability of this class of composites by modifying the surface of the reinforcement, mainly using different types of organic or inorganic coatings. Although different solutions have been proposed, the feasibility of applying these techniques strictly depend on the final application of the composite. This review aims to give an overview of the different methods that have been proposed in the literature and to highlight advantages and drawbacks.

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Section: Inorganic Coatingsmentioning

confidence: 99%

Section: Inorganic Coatingsmentioning

confidence: 99%

Surface Modification of Glass Textile for the Reinforcement of a Cement-Based Composite: A Review

Bompadre

Donnini

2021

Applied Sciences

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“…During the real-time impregnation for dry fibers, residual air in the pores of fibers results in dry spots and microvoids, which are usually formed due to irregular permeability of fibers, improper injection locations and nonuniform microarchitecture of the dry fiber bundle (Lee et al , 2006). The major advantage of the preimpregnation technique is that the printed fibers can be bonded firmly with fewer inner voids because of the long impregnation time and sufficient impregnation resin (Homoro et al , 2022; Fung et al , 2003). Therefore, the preimpregnation process is preferred in this article when considering the convenience of the printing process and stable mechanical properties.…”

Section: D Printing Processmentioning

confidence: 99%

Effect of process parameters on properties of 3D printed continuous fiber reinforced thermoplastic composites

Chen

Zhang

Yuan

et al. 2023

RPJ

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Purpose Continuous fiber reinforced thermoplastic composites (CFRTPCs) with great mechanical properties and green recyclability have been widely used in aerospace, transportation, sports and leisure products, etc. However, the conventional molding technologies of CFRTPCs, with high cost and low efficiency, limit the property design and broad application of composite materials. The purpose of this paper is to study the effect of the 3D printing process on the integrated rapid manufacturing of CFRTPCs. Design/methodology/approach Tensile and flexural simulations and tests were performed on CFRTPCs. The effect of key process parameters on mechanical properties and molding qualities was evaluated individually and mutually to optimize the printing process. The micro morphologies of tensile and flexural breakages of the printed CFRTPCs were observed and analyzed to study the failure mechanism. Findings The results proved that the suitable process parameters for great printing qualities and mechanical properties included the glass hot bed with the microporous and solid glue coatings at 60°C and the nozzle temperature at 295°C. The best parameters of the nozzle temperature, layer thickness, feed rate and printing speed for the best elastic modulus and tensile strength were 285°C, 0.5 mm, 6.5r/min and 500 mm/min, respectively, whereas those for the smallest sectional porosity were 305°C, 0.6 mm, 5.5r/min and 550 mm/min, respectively. Originality/value This work promises a significant contribution to the improvement of the printing quality and mechanical properties of 3D printed CFRTPCs parts by the optimization of 3D printing processes.

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“…FRCM consists of composite materials composed of continuous yarns embedded in a mineral matrix [41]. These composites present a range of advantages, including excellent mechanical properties, good re resistance, lightweight, ease of implementation, cost-e ciency, permeability, and compatibility with masonry and concrete structures [42], [43]. Natural FRCM composites have proven to be an e cient solution in reinforcing element structures -especially against seismic risks [44].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Bio-Based Concrete Mechanical Properties: A Novel Approach with Composite Sandwiches and Confined Cylinders

Bardouh,

Homoro,

Reboul

et al. 2024

Preprint

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This paper addresses the growing use of bio-based materials in Europe, thanks to their low embodied energy and carbon sequestration. Despite favorable hygrothermal and acoustic properties, the inherent challenge lies in the low mechanical properties of biobased concrete. This study presents an innovative approach to strengthen hemp concrete through natural FRCM (Fabric Reinforced Cementitious Matrix), using two distinct reinforcement techniques. Firstly, a bending reinforcement consists of applying natural FRCM as the outer skins of a composite sandwich, with hemp concrete as the core. The effect of textile layers and pre-impregnation on the FRCM mechanical properties within the composite sandwich is evaluated. Secondly, compressive reinforcement entails confining hemp concrete specimens with FRCM. The results show a significant improvement in the mechanical properties of hemp concrete, with bending and compressive reinforcement leading to increases in the mechanical strength up to 17530% and 258%, respectively. Configurations involving mineral-impregnated fabric (PM FRCM) demonstrate superior mechanical reinforcement since it allows a better interphase bond between fabric and cementitious matrix. Different failure modes are observed between reference (non-reinforced) specimens and reinforced specimens, with bending reinforced specimens exhibiting shear failure and debonding at the interface of the composite sandwich, while reference specimens fail in bending. Moreover, compressive reinforced specimens undergo crushing of hemp concrete after tensioning rupture of the fabric, while reference specimens present angular shear path in the middle of the specimens. The results underscore the promise of FRCM in mechanically reinforcing biobased concrete, opening new opportunities for their expanded use in the construction industry.

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Improvement of the mechanical properties of a glass multifilament yarn reinforced ettringitic matrix using an innovative pre-impregnation process

Cited by 9 publications

References 23 publications

Surface Modification of Glass Textile for the Reinforcement of a Cement-Based Composite: A Review

Surface Modification of Glass Textile for the Reinforcement of a Cement-Based Composite: A Review

Effect of process parameters on properties of 3D printed continuous fiber reinforced thermoplastic composites

Enhancing Bio-Based Concrete Mechanical Properties: A Novel Approach with Composite Sandwiches and Confined Cylinders

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