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Open AccessArticle

Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

1
CERIS, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
2
National Laboratory for Civil Engineering, 1700-066 Lisbon, Portugal
*
Author to whom correspondence should be addressed.
Materials 2019, 12(22), 3648; https://doi.org/10.3390/ma12223648
Received: 12 October 2019 / Revised: 28 October 2019 / Accepted: 4 November 2019 / Published: 6 November 2019
(This article belongs to the Special Issue Novel Bioderived Composites from Wastes)
The susceptibility of rendering mortars to cracking is a complex phenomenon. Fibers have been incorporated in mortars to ensure the durability of the render and can improve the flexural strength, fracture toughness, and impact resistance of the mortars. Aside from the better cracking performance of fiber reinforced mortars, natural fibers have been a path to reducing the environmental impacts of construction materials. Recycling has high sustainability-related potential as it can both mitigate the amount of waste being inadequately disposed and reduce the consumption of natural raw materials. Studies on the incorporation of waste in civil engineering materials have been growing, and recycled fibers may be feasible to incorporate in mortars. Natural fibers are considered as a viable replacement for synthetic ones. Several studies have investigated vegetal fibers in cementitious composites. However, only a few have focused on the incorporation of waste animal-based fiber. The aim of this work is to analyze the feasibility of the use of natural sheep’s wool fibers on the reinforcement of mortars and in particular to improve their cracking behavior. For this purpose, two different binders were used: cement and cement-lime mortars were produced. The incorporation of 10% and 20% (in volume) of 1.5 cm and 3.0 cm wool fibers was analyzed. The results show that the incorporation of wool fibers increased the ductility of the mortars and improved their mechanical properties. View Full-Text
Keywords: render; cement and cement-lime reinforced mortars; natural fiber; sheep’s wool; sustainability render; cement and cement-lime reinforced mortars; natural fiber; sheep’s wool; sustainability
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MDPI and ACS Style

Maia Pederneiras, C.; Veiga, R.; de Brito, J. Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers. Materials 2019, 12, 3648.

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