Thermal Response and Mechanical Properties of Groundnut Shells’ Composite Boards

Authors

  • Nsikak Edet Ekpenyong Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Sylvester Andrew Ekong Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Ekong Ufot Nathaniel Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Jewel Emem Thomas Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Uduakobong Sunday Okorie Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Ubong Williams Robert Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Inyang Anietie Akpabio Department of Physics, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria
  • Nsibiet Uso Ekanem Department of Chemistry, College of Education, Afaha Nsit, Nsit Ibom, Awa Ibom State, Nigeria

Keywords:

Alkaline treatment, Bulk density, Flexural strength, Thermal conductivity, Heat penetration time, Solar radiation absorptivity

Abstract

Yearly, groundnut shells are generated in vast quantities as waste materials but under-utilised. As a result of inefficient solid waste management system in developing and less-developed countries, their disposal is prevalently done by open burning, unplanned landfilling, and indiscriminate dumping. Any of these practices pose severe adverse effects on environments and public health. This work was designed to devise a way of solving the problem and also get useful materials for building construction. Untreated groundnut shell particles (UGP) and treated groundnut shell particles (TGP) were utilised at 0, 25, 50, 75, and 100 % volumetric levels to fabricate samples. The samples were developed in triplicates and in each case, cassava starch slurry was used as binder at 1:3 ratio to composite mix. After complete sun-drying of the samples, all of them were subjected to various tests to determine their thermal responses and mechanical properties. Mean increments with increasing fractions of TGP were observed in terms of water absorption (38.55 – 56.95 %), bulk density (716.3 – 770.8 kgm-3), thermal conductivity (0.1545 – 0.1742 Wm-1K-1), thermal diffusivity (1.394 – 1.524 x 10-7 m2s-1), nailability (88.5 – 100.0 %), and flexural strength (1.040 – 2.255 N/mm2). On the contrary, decrements were noticed in the cases of specific heat capacity (1547.3 – 1482.8 Jkg-1K-1), heat penetration time (0.1614 – 0.1476 hr), and solar radiation absorptivity (16.15 – 15.45 m-1) as proportions of TGP increased. It was found that 50 % loading level of TGP could yield sample with the best thermal response and mechanical strength. Generally, the samples exhibited tendencies to perform better than Isorel, asbestos, plaster of Paris, which are widely-used conventional building materials. Hence, utilising groundnut shells as described herein could help to solve their disposal problems and provide suitable materials for thermal insulation in buildings.

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2023-04-25

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Ekpenyong, N. E., Ekong, S. A., Nathaniel, E. U., Thomas, J. E., Okorie, U. S., Robert, U. W., … Ekanem, N. U. (2023). Thermal Response and Mechanical Properties of Groundnut Shells’ Composite Boards. Researchers Journal of Science and Technology, 3(1), 42–57. Retrieved from https://rejost.com.ng/index.php/home/article/view/50

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Vol. 3 No. 1 (2023): Researchers Journal of Science and Technology

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