Hybrid Mortar Composites Incorporating Oyster Shell Filler and Recycled Fibers from Disposable Masks
René Sebastián Mora-Ortiz, Sergio Alberto Díaz Alvarado, Ebelia Del Angel-Meraz, Francisco Magaña-Hernández, Mayra Agustina Pantoja Castro, Emmanuel Munguía-Balvanera
TL;DR
This paper explores using waste materials from face masks and oyster shells to create stronger, more sustainable mortar composites.
Contribution
The novel contribution is combining oyster shell powder and recycled mask fibers to enhance mortar properties while repurposing waste.
Findings
Adding 5% oyster shell powder increased compressive strength by 10% and bond strength by 21%.
An optimal 0.2% of 6 mm mask fibers maintained tensile strength similar to the control mix.
Higher fiber content or longer strips reduced strength due to increased porosity and water absorption.
Abstract
This study presents the development of hybrid masonry mortars by incorporating two waste materials: recycled plastic strips from disposable face masks (FM) as mechanical reinforcement and calcined oyster shell powder (OSP) as a filler. The objective was to evaluate the combined effect of FM and OSP on the mechanical behavior of mortars. Three types of mixes were prepared: a reference mix, a mix with 5% OSP (by cement weight), and mixes with 5% OSP reinforced with FM strips. FM strips were incorporated at three different lengths, dividing the FM-reinforced group into three subgroups (0.1%, 0.2%, 0.5%, and 0.8%). The results showed an approximately 10% increase in compressive strength with the addition of 5% OSP compared to the control mortar, as well as an improvement in bond strength of about 21%. Furthermore, an optimum content of 0.2% of 6 mm strips allowed for adequate dispersion and…
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Taxonomy
TopicsMaterials Engineering and Processing · Innovations in Concrete and Construction Materials · Recycling and utilization of industrial and municipal waste in materials production