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Article

Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars

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.
Academic Editor: Lizhi Sun
Materials 2021, 14(4), 823; https://doi.org/10.3390/ma14040823
Received: 15 January 2021 / Revised: 2 February 2021 / Accepted: 5 February 2021 / Published: 9 February 2021
(This article belongs to the Special Issue Recycled Materials in Civil and Environmental Engineering)
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. View Full-Text
Keywords: vegetable fiber; fiber-reinforced mortar; cement and cement-lime mortars; sustainability; render vegetable fiber; fiber-reinforced mortar; cement and cement-lime mortars; sustainability; render
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MDPI and ACS Style

Maia Pederneiras, C.; Veiga, R.; de Brito, J. Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars. Materials 2021, 14, 823. https://doi.org/10.3390/ma14040823

AMA Style

Maia Pederneiras C, Veiga R, de Brito J. Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars. Materials. 2021; 14(4):823. https://doi.org/10.3390/ma14040823

Chicago/Turabian Style

Maia Pederneiras, Cinthia, Rosário Veiga, and Jorge de Brito. 2021. "Physical and Mechanical Performance of Coir Fiber-Reinforced Rendering Mortars" Materials 14, no. 4: 823. https://doi.org/10.3390/ma14040823

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