Enhancing the Flexural Strength of Perlite/Gypsum Composite Panels and Their Sandwich Structures using Gypsum Layer
DOI:
https://doi.org/10.38032/scse.2025.3.159Keywords:
Gypsum, Perlite, Reinforcement Layer, Sandwich Structure, Flexural PropertiesAbstract
In gypsum/perlite composite panels, due to incorporation of lightweight expanded perlite particles, the flexural properties are affected negatively. To address this issue, the flexural strength of gypsum/perlite composite panels and their sandwich structures with a gypsum surface layer was investigated in this work. The perlite contents of the composite were varied (40 g, 60 g and 80 g for each 390 g of gypsum) to manufacture the composites. A single gypsum layer was given on one side of the gypsum/perlite composite panels to improve the flexural strength. The sandwich structures with and without gypsum layer were fabricated by attaching formica sheet skins on both sides of the panels. Results show that the density reduced with more perlite content, making the panels lightweight and slightly increased due to addition of gypsum layer. Flexural testing revealed that pure gypsum panels had the maximum flexural strength while, with the increase of perlite in the matrix, the flexural strength decreased. Introducing the gypsum layer improved the flexural strength for these panels. Introducing formica sheet skins to the panels improved their flexural strength significantly. However, the best result was obtained for the sandwich panels using the gypsum layer in the gypsum/perlite composite core. The findings of this work show the method of improving the flexural strength of gypsum/perlite composite panels without losing the lightweight properties significantly.
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Copyright (c) 2025 Md. Sabbir Raihan, Md. Mohaimenul Islam, Md Arifuzzaman, Md Shariful Islam (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
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