Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

Pederneiras, Cinthia Maia; Veiga, Rosário; Brito, Jorge de

doi:10.3390/ma12223648

Cited by 25 publications

(18 citation statements)

References 13 publications

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“…Similar to other natural fibres, wool improved the mechanical and ecological performances of the mortars. Pederneiras et al came to the same conclusions [52]: the use of wool fibres in cement mortars improved the flexural strength. A higher increase in flexural strength was observed for longer fibres (30 mm) in comparison to shorter fibres (15 mm).…”

Section: Mechanical Behaviormentioning

confidence: 73%

Wool-Reinforced Cement Based Composites

Jóźwiak–Niedźwiedzka

Fantilli

2020

Materials

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In this paper, an overview of the latest research activities in the field of cement-based composites incorporating sheep wool reinforcement is presented. First, the characteristics of this type of natural fibre are described. Then, the current use of sheep wool fibres in cement-based composites is discussed. The research problems regarding the properties of cement matrix composites reinforced with sheep wool are divided into four groups: thermal and acoustic properties, mechanical behavior, durability issues, and microstructure aspects. The latter two groups are analysed separately, because both durability and microstructure are of particular importance for future applications of wool reinforcement. Finally, the main directions of future researches are presented.

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Section: Mechanical Behaviormentioning

confidence: 73%

Wool-Reinforced Cement Based Composites

Jóźwiak–Niedźwiedzka

Fantilli

2020

Materials

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“…A reduction in the modulus of elasticity with the addition of natural fibers in mortars was also found in the literature. For cement-based mortars, Maia et al [ 30 ] reported a decrease in modulus of elasticity when natural sheep’s wool fibers were added. Sathiparan et al [ 14 ] also noticed a reduction in modulus of elasticity when coir fibers were incorporated in cement-lime mortars.…”

Section: Resultsmentioning

confidence: 99%

Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars

2021

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Coir fiber is a by-product waste generated in large scale. Considering that most of these wastes do not have a proper disposal, several applications to coir fibers in engineering have been investigated in order to provide a suitable use, since coir fibers have interesting properties, namely high tensile strength, high elongation at break, low modulus of elasticity, and high abrasion resistance. Currently, coir fiber is widely used in concrete, roofing, boards and panels. Nonetheless, only a few studies are focused on the incorporation of coir fibers in rendering mortars. This work investigates the feasibility to incorporate coir fibers in rendering mortars with two different binders. A cement CEM II/B-L 32.5 N was used at 1:4 volumetric cement to aggregate ratio. Cement and air-lime CL80-S were used at a volumetric ratio of 1:1:6, with coir fibers were produced with 1.5 cm- and 3.0 cm-long fibers and added at 10% and 20% by total mortar volume. Physical and mechanical properties of the coir fiber-reinforced mortars were discussed. The addition of coir fibers reduced the workability of the mortars, requiring more water that affected the hardened properties of the mortars. The modulus of elasticity and the compressive strength of the mortars with coir fibers decreased with increase in fiber volume fraction and length. Coir fiber’s incorporation improved the flexural strength and the fracture toughness of the mortars. The results emphasize that the cement-air-lime based mortars presented a better post-peak behavior than that of the cementitious mortars. These results indicate that the use of coir fibers in rendering mortars presents a potential technical and sustainable feasibility for reinforcement of cement and cement-air-lime mortars.

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“…Other research activities were focused on the incorporation of sheep wool fibers in cement mortars or in cement-lime mortars, with the aim to improve the thermal and mechanical performance of mortars. As a result of performed tests, the use of sheep wool fibers reduces susceptibility of cracking when compared with the mortars realized without reinforced fibers [28].…”

Section: Mechanical Properties Of Sheep Woolmentioning

confidence: 96%

Organized Framework of Main Possible Applications of Sheep Wool Fibers in Building Components

Parlato

Porto

2020

Sustainability

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Greasy sheep wool is currently considered a special waste for its high bacterial load, with expensive disposal costs for sheep breeders. For this reason, wool is often burned or buried, with serious consequences for the environment. On the other hand, sheep wool is well regarded as one of the most performative insulating natural fibers due to its thermo-hygrometric and acoustic properties. In the building sector, sheep wool meets the requirements of green building components because it is an eco-friendly material, there is a surplus of it, it is annually renewable, and totally recyclable. If used instead of common insulation materials (e.g., fiberglass, rock wool, polyurethane foam, polystyrene), sheep wool offers significant benefits for sustainability such as a reduction in the production costs for new insulating materials and in environmental pollution. Mechanical and physical properties of sheep wool investigated in previous studies were assessed and discussed with the aim of providing an organized framework of possible applications of wool fibers in building components. This paper highlights in detail aspects that have not yet been investigated enough to detect new potential uses of sheep wool fibers in rural buildings and the reuse of traditional ones.

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Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

Cited by 25 publications

References 13 publications

Wool-Reinforced Cement Based Composites

Wool-Reinforced Cement Based Composites

Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars

Organized Framework of Main Possible Applications of Sheep Wool Fibers in Building Components

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