Mechanical performance of aged cement-based matrices reinforced with recycled aramid textile nonwoven fabric: Comparison with other FRCMs

Abstract

Utilizing recycled fibers as reinforcement in cement-based matrices is an effective means of promoting waste recycling and adopting a circular economy approach in the construction industry. Within this framework, the recycling and potential reutilization of textile residues can improve the pre- and post-cracking performance of cement-based matrices intended for building components with up to intermediate structural responsibilities (i.e., panels and cladding elements for buildings). This research is focused on the mechanical and durability -through forced aging of dry-wet and freeze-thaw cycles- experimental characterization of laminated fabric-reinforced cementitious matrices (FRCMs) containing 4 and 6 nonwoven fabric layers obtained from end-of-life fire-protecting t-shirts. For this purpose, both direct and flexural tensile tests were conducted to characterize the mechanical performance of the composite. The tests on the 6-fabric layers produced panels with Portland Cement (PC) matrix, after 28-day of curing, led to average values of the maximum tensile strength of 3.7 MPa with associated toughness index superior to 25 kJ/m2, and mean modulus of rupture of 11.6 MPa with a fracture energy index of 4.3 kJ/m2. After dry-wet accelerated aging, the post-cracking performance of the developed composites decreased (on average, 40% in toughness and 11% in strength) due to fiber embrittlement. To better understand the performance of aged composites, shredded fibers recovered from protective clothing (mainly consisting of meta-aramid fibers) were immersed in the binary matrix. Accordingly, the mechanical properties of the fibers after 5 and 10 cycles of dry-wet aging were studied. Based on the results, replacing partially PC by silica fume (between 30% and 50%) was seen as a sustainable alternative to improve the performance of the aged fibers by more than 10%.

Publication DOI: https://doi.org/10.1016/j.cscm.2024.e02994
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Civil Engineering
Funding Information: The authors express their gratitude to the Agencia Estatal de Investigación , Spanish Ministry of Economy, Industry, and Competitiveness (Government of Spain) for the financial support received under the scope of the project RECYBUILDMAT ( PID2019-108067R
Additional Information: Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).
Uncontrolled Keywords: Accelerated aging,Cementitious composites,lexural/tensile properties,Recycled fibers,Textile-reinforced mortars,Waste valorization
Publication ISSN: 2214-5095
Last Modified: 11 Nov 2024 09:03
Date Deposited: 13 Mar 2024 13:50
Full Text Link:
Related URLs: https://www.sci ... 214509524001451 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2024-07
Published Online Date: 2024-02-20
Accepted Date: 2024-02-18
Authors: Sadrolodabaee, Payam (ORCID Profile 0000-0003-2789-4406)
Fuente, Albert de la
Ardanuy, Mònica
Claramunt, Josep

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