Incorporation of high contents of textile, acrylic and glass waste fibres in cement-based mortars. Influence on mortars’ fresh, mechanical and deformability behaviour

Farinha, Catarina Brazão; Brito, Jorge de; Veiga, Rosário

doi:10.1016/j.conbuildmat.2021.124424

Cited by 24 publications

(9 citation statements)

References 21 publications

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“…This enhancement can be attributed to interfacial transition bond between fGF and the cement matrix (Yuan and Jia 2021). It is worth mentioning that the majority of the literature reports a decrease in compressive strength when glass fibers are added (Brazão Farinha et al 2021, Fenu et al 2016, whereas a smaller number of publications corroborate the findings of this research (Blazy et al 2022). The optimal amount of fibers plays a crucial role in optimizing the internal pore structure and increasing the density of the concrete microstructure.…”

Section: Resultssupporting

confidence: 62%

Influence of Alkali-resistant Glass Fibers Distribution on Properties of Cementitious Composites

Mrduljaš,

Pranjić,

Stefanic

et al. 2023

16th International Conference on Durability of Building Materials and Components

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The waste hierarchy establishes a prioritized framework for effective waste management, where higher levels such as prevention, re-use, and recovery are associated with the conservation of primary resources and the retrieval of secondary resources. This approach aligns with the objectives of the construction industry, which aims to promote the efficient utilization of resources by treating raw materials in an environmentally responsible manner. In this context, utilizing waste fibers to reinforce cementitious composites becomes more logical than producing new fibers with similar properties. These waste fibers typically originate from the production of high-performance technical textiles used for structural repair and rehabilitation. By reusing these waste materials, the construction industry contributes a circular economy in its own sector and fosters cross-sectoral industrial symbiosis. Although the potential benefits and positive environmental impact of utilizing such materials are recognized, their influence on the properties of composites requires further investigation. This study examines the impact of production waste glass fibers on the properties of the mortar in both the fresh and hardened states. The study focusses on properties such as compressive strength and toughness. To gain a better understanding of the fibers' contribution to the matrix properties, an investigation was conducted using µCT. The study focuses on investigating the effects of waste fibers with lengths of 5 and 10 mm and different dosages (0.2, 0.6 vol.%) on the properties of high-strength mortar, comparing them with factory fibers.

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Section: Resultssupporting

confidence: 62%

Influence of Alkali-resistant Glass Fibers Distribution on Properties of Cementitious Composites

Mrduljaš,

Pranjić,

Stefanic

et al. 2023

16th International Conference on Durability of Building Materials and Components

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“…In recent years, fibre-reinforced concrete (FRC), comprising both normal-strength (NSC-FRC) and ultra-high-performance fibre-reinforced concrete (UHP-FRC), has gained traction across various structural applications, such as high-rise buildings, long-span bridge girders, critical structures, and the repair or reinforcement of existing infrastructure [4][5][6]. Fibre composites are being developed to improve the mechanical properties of brittle materials with limited post-cracking ductility [7][8][9][10]. The process depends on factors like the fibre type, aspect ratio, strength, surface bonding characteristics, content, orientation, and strength of the cementitious matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The process depends on factors like the fibre type, aspect ratio, strength, surface bonding characteristics, content, orientation, and strength of the cementitious matrix. Fibres can be incorporated into various types, including steel, glass, polypropylene, and natural fibres [9,10]. For instance, adding a 2% steel fibre volume fraction with a blast furnace slag can increase compressive strength by up to 30% and peak flexural strength by 49% [11].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of the Concrete Equivalent Mortar Method for the Prediction of Fresh and Hardened Properties of Concrete

Ibrahim,

Wardeh,

Fares

et al. 2024

Buildings

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Modern concrete mix design is a complex process involving superplasticisers, fine powders, and fibres, requiring time and energy due to the high number of trial tests needed to achieve rheological properties in the fresh state. Concrete batching involves the extensive use of materials, time, and the testing of chemical admixtures, with various methodologies proposed. Therefore, in some instances, the required design properties (physical and mechanical) are not achieved, leading to the loss of resources. The concrete equivalent mortar (CEM) method was introduced to anticipate concrete behaviour at fresh and hardened states. Moreover, the CEM method saves time and costs by replacing coarse aggregates with an equivalent sand mass, resulting in an equivalent specific surface area at the mortar scale. This study aims to evaluate the performance of fibre in CEM and concrete and determine the relationships between the CEM and the concrete in fresh and hardened states. Steel and polypropylene fibres were used to design three series of mixtures (CEM and concrete): normal-strength concrete (NSC), high-strength concrete (HSC), high-strength concrete with fly ash (HSCFA), and equivalent normal-strength mortar (NSM), high-strength mortar (HSM), and high-strength mortar with fly ash (HSMFA). This study used three-point bending tests and digital image correlation to evaluate load and crack mouth opening displacement (CMOD) curves. An analytical mode I crack propagation model was developed using a tri-linear stress–crack opening relationship. Post-cracking parameters were optimised using inverse analysis and compared to actual MC2010 characteristic values. The concrete slump is approximately half of the CEM flow; its compressive strength ranges between 78% and 82% of CEM strength, while its flexural strength is 60% of CEM strength. The post-cracking behaviour showed a significant difference attributed to the presence of aggregates in concrete. The fracture energy of concrete is 28.6% of the CEM fracture energy, while the critical crack opening of the concrete is 60% of that of the CEM.

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“…On the other hand, alternative eco-friendly solutions to commercial fibre-reinforced cement mortars based on the addition of waste fibres, have recently been proposed [8][9]. Brazao et al [10] developed cement-based mortar composites containing high contents of textile, acrylic, and glass waste fibres. As a result, improvements on deformability and impact resistance were shown, as well as crack reduction of the reinforced mortars, corresponding the best behaviour to textile fibres.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of physico-mechanical properties of polypropylene fibre-reinforced gypsum composites

Romero-Gómez,

Rubio-de-Hita,

Pedreño-Rojas

et al. 2023

Proceedings of the 15th International Conference on X-Ray Microscopy – Xrm2022

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Nowadays, the growing demand of plastic is leading to an uncontrolled waste production that threats the Planet's health. Over 8 million tonnes of plastic debris go into the ocean annually because of poor end-life management. Single-use products represent one of the main sources of plastic pollution, due to its low recycling rate related to its large production. Among them, personal hygiene disposable products (e.g., non-degradable wet wipes) represent a hazardous concern to marine ecosystem because of their dumping into the sea, dragged away by wastewater currents. Classified as non-woven textiles, non-degradable wet wipes are made from polymeric fibres, mainly polypropylene (PP), that complicate their degradation in contact with water. The incorrect disposal society makes of this waste causes devasting blockages in sewerage network, with alarming environmental and economic consequences. In this sense, alternative solutions to promote the recycling of this waste are needed in support of governmental regulations. Thus, from construction sector and committed to the Circular Economy's objectives set by the European Green Deal, the present work evaluates the feasibility of using PP waste fibres from disposable wet-wipes, as alternative to commercial PP reinforcement fibres, to produce eco-friendly reinforced gypsum-based products. Two types of reinforced-gypsum composites were prepared by adding commercial polypropylene (PPF) and waste polypropylene (PPWF) fibres, respectively. Different addition levels of fibre (2, 2.5, 3 and 3.5% by weight of gypsum) were selected to develop each group of gypsum blends. Then, composites were subjected to an experimental campaign based on dry density, mechanical behaviour (flexural and compressive strength) and deformability pre-failure, following the guidelines stablished by standards and comparing the results with the control material. The results showed a slight decrease of density as the percentage of PPWF rose, when compared to reference gypsum. Despite of the fact that lower values of mechanical strength were got by composites containing PPWF compared to those reinforced by PPF, a significant improvement of flexural strength (up to ∼19.5%) was reached by mixtures with 2.5wt% PPWF content, in relation to control material. On the other hand, a decrease on compressive strength of composites with PPWF addition was observed, unlike the performance showed by gypsums with PPF content up to 2.5 wt% (∼4.5% increase). However, all the data were over the minimum strength values stablished by standard. Furthermore, greater plastic deformation was developed by fibre-reinforced gypsum before to reach the failure point, in comparison with control gypsum which presented a brittle failure. Finally, it could be inferred the effectiveness of commercial PPF to enhance the mechanical properties of gypsum composites, just as the feasibility of using recycled WPPF as eco-friendly replacement to obtain gypsums for construction applications with both mechanical and environmental improvements, so promo...

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Incorporation of high contents of textile, acrylic and glass waste fibres in cement-based mortars. Influence on mortars’ fresh, mechanical and deformability behaviour

Cited by 24 publications

References 21 publications

Influence of Alkali-resistant Glass Fibers Distribution on Properties of Cementitious Composites

Influence of Alkali-resistant Glass Fibers Distribution on Properties of Cementitious Composites

Effectiveness of the Concrete Equivalent Mortar Method for the Prediction of Fresh and Hardened Properties of Concrete

Comparative study of physico-mechanical properties of polypropylene fibre-reinforced gypsum composites

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