Sustainable Bio-Based Composites from Termite Mound Soil and Agro-Waste for Lightweight and Acoustic Applications
DOI:
https://doi.org/10.48048/tis.2026.11507Keywords:
Termite Mound Soil, Rice husk, Eggshell, Bio-based materials, Acoustic properties, Termite mound soil, Rice husk, Eggshell, Bio-based materials, Acoustic propertiesAbstract
This study explores the use of termite mound soil (TMS) as a partial cement replacement in lightweight composites, with emphasis on physical and acoustic performance. Four formulations were prepared: CT (cement + TMS), CTR (cement + TMS + rice husk), CTE (cement + TMS + eggshell) and CTRE (cement + TMS + rice husk + eggshell), cured in water for 7, 14 and 28 days. Bulk density, compressive strength and noise reduction coefficient (NRC) were evaluated. CT composites showed the highest density and strength but did not significantly differ in NRC from the modified formulations. The incorporation of rice husk and eggshell increased water absorption while reducing mechanical performance. ANOVA confirmed significant effects of formulation and curing duration on density and mechanical strength, while NRC remained largely unaffected. TMS-based composites show strong potential as eco-friendly, non-load-bearing construction materials, although the incorporation of agricultural by-products requires further study to clarify their effects.
HIGHLIGHTS
- Termite mound soil (TMS) was used to develop sustainable lightweight materials.
- CT (50% TMS and 50% cement) bricks exhibited the highest density, compressive strength, and lowest water absorption.
- Incorporation of rice husk and eggshells decrease density, with rice husk showing a marginal trend toward higher NRC, but overall sound absorption was not significantly improved, while strength was reduced.
- Brick formulation and curing time significantly influenced density and compressive strength.
- TMS-based bricks—especially the unmodified formulation—demonstrate potential as eco-friendly, non-load-bearing construction materials.
GRAPHICAL ABSTRACT
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