Experimental analysis on tensile and bond properties of PBO and aramid fabric reinforced cementitious matrix for strengthening masonry structures

Caggegi, Carmelo; Carozzi, Francesca Giulia; Santis, Stefano De; Fabbrocino, Francesco; Focacci, Francesco; Hojdys, Łukasz; Lanoye, Emma; Zuccarino, Luigia

doi:10.1016/j.compositesb.2017.05.048

Cited by 196 publications

(89 citation statements)

References 34 publications

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“…These include direct tensile tests on TRM composites (and to some extent flexural tests), see e.g. [2][3][4]6], TRM-to-substrate bond behaviour, see e.g. [2][3][4]6], diagonal compression tests on TRM-strengthened masonry, see e.g.…”

Section: Discussion On Experimental Testing Activitiesmentioning

confidence: 99%

“…[2][3][4]6], TRM-to-substrate bond behaviour, see e.g. [2][3][4]6], diagonal compression tests on TRM-strengthened masonry, see e.g. [15,16], or static cyclic (and in very few cases dynamic tests) on TRM-strengthened masonry structures, see e.g.…”

Section: Discussion On Experimental Testing Activitiesmentioning

confidence: 99%

“…A large variety of singlelap and double-lap shear test setups have been used and proposed by different authors. The round robin tests performed in the framework of RILEM TC 250-CSM are probably the most notable and comprehensive experimental database available in this field [2][3][4]. The results produced as the output of this activity showed a large variability of the bond strength, failure mode and force-slip curves between similar specimens tested in different test setups as well as between similar specimens tested under similar test setups but in different laboratories.…”

Section: Trm-to-substrate Bond Behaviourmentioning

confidence: 99%

“…The TRM-to-masonry bond tests have been extensively used for characterization of the bond performance in TRMstrengthened components [1][2][3]6]. A large variety of singlelap and double-lap shear test setups have been used and proposed by different authors.…”

Section: Trm-to-substrate Bond Behaviourmentioning

confidence: 99%

“…Application of textile reinforced mortars (TRMs) for externally bonded reinforcement of existing concrete and masonry structures has recently received a growing attention. The better physical, mechanical and hygrothermal compatibility of TRMs with masonry and concrete, compared to that of conventional fibre reinforced polymers [1][2][3][4] has made these composites the preferred choice for strengthening of those structures.…”

Section: Introductionmentioning

confidence: 99%

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Mechanics and durability of lime-based textile reinforced mortars

Ghiassi

2020

RILEM Tech Lett

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Application of lime-based textile-reinforced mortars (TRMs) for strengthening of masonry structures have received a growing attention in recent years. An extensive effort has been devoted to understanding of the performance of these composites and their effectiveness in improving the seismic safety of existing masonry structures. Nevertheless, several aspects regarding the durability and mechanics of these composites still remain unknown. This letter is an effort on highlighting those aspects considering both experimental and numerical modelling approaches.

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Section: Discussion On Experimental Testing Activitiesmentioning

confidence: 99%

Section: Discussion On Experimental Testing Activitiesmentioning

confidence: 99%

Section: Trm-to-substrate Bond Behaviourmentioning

confidence: 99%

Section: Trm-to-substrate Bond Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanics and durability of lime-based textile reinforced mortars

Ghiassi

2020

RILEM Tech Lett

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Composite helical spring with skin‐core structure: Structural design and compression property evaluation

et al. 2020

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The helical spring is an essential mechanical component of automobile and machinery and has been widely used in industrial application. The weight reduction is the requirement of current material design and also the research trend for material development. In this study, a novel composite helical spring with "skin-core" structure was designed and fabricated with an integrated formation process based on the vacuum-assisted resin infusion technology. Based on the different function of skin and core, the skin structure was weft knitting tube made of aramid and ultra-high molecular weight polyethylene fiber, and the core structure was unidirectional carbon fiber. By selecting material for knitting tube and adjusting the volume content of carbon fiber core, the static and fatigue compression properties of composite helical spring were investigated. It has been found that the spring torsion and bending performance can be improved by wrapping the core with the knitting tube as the spring wire. Moreover, the finite element method was applied to further analyze the stress evolution of the "skin-core" composite helical spring during compression and fatigue. The results of compression test and simulation show that the spring stiffness can be effectively improved by using knitting tube and increasing the content of carbon fiber. The stress of the spring cross section is concentrated in the internal radial region of 180 , and the distribution of the corresponding cross sections is relatively uniform. The "skin-core" structure with aramid knitting tube as the outer skin and carbon fiber as the spring core significantly improves the load-carrying capacity and stability of the composite spring. The proposed lightweight helical composite could provide a replacement strategy of existing metal or unidirectional filament reinforced springs used in the engineering applications.

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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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Experimental analysis on tensile and bond properties of PBO and aramid fabric reinforced cementitious matrix for strengthening masonry structures

Cited by 196 publications

References 34 publications

Mechanics and durability of lime-based textile reinforced mortars

Mechanics and durability of lime-based textile reinforced mortars

Composite helical spring with skin‐core structure: Structural design and compression property evaluation

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

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