An Investigation into the Thermal Properties of Termite Mound Clay Applicable to Grain Silo Construction
International Journal of Materials Science and Applications
Volume 4, Issue 4, July 2015, Pages: 266-271
Received: Jun. 18, 2015;
Accepted: Jul. 6, 2015;
Published: Jul. 15, 2015
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Omobowale Mobolaji Oluyimika, Department of Agricultural and Environmental Engineering, University of Ibadan, Oyo State, Nigeria
Mijinyawa Yahaya, Faruk S., Department of Agricultural and Environmental Engineering, University of Ibadan, Oyo State, Nigeria
Provision of suitable grain silos in humid tropical climates has generated research interests on the possibility of using local materials for construction. Termite mound clay (TMC), a material available in abundance was investigated as a potential construction material. A major factor determining the suitability of construction materials for grain silos is its thermal properties. Therefore, thermal conductivity, specific heat capacity, thermal diffusivity and thermal mass of TMC were determined and compared with those of concrete and stainless steel which are commonly used for silo construction. TMC was collected, crushed and sieved using a 500μm sieve to remove coarse particles and foreign materials. The TMC powder obtained was mixed with water using volumetric ratio of 1:5 (i.e. water to clay) after which the thoroughly mixed clay was carefully fed into the mould and left to air-dry for 5 days. The samples were dried in the oven at 105oC for about 48 hours to remove all the moisture. Results revealed that thermal conductivity ranged from 0.17 to 0.24 W/(m•K) with an average value of 0.21 compared to concrete and steel which range between 0.8 – 1.28 and 16.3 – 16.7 W/(m•K) respectively. Specific heat capacity had an average value of 2576.94 J/(kg•K) compared with concrete and steel which had values of 960 and 490 J/(kg•K) respectively. Thermal diffusivity had a mean value of 1.47×10-8 m2/s in comparison to concrete and steel whose calculated values were 6.63 ×10-7 and 4.18 ×10-6 kJ/(m3•K) respectively while thermal mass had a mean value of 4723.5 kJ/(m3•K) compared to 2112.0 and 3831.8 kJ/(m3•K) for concrete and steel respectively. It was concluded that TMC offers a thermally suitable alternative to these two for grain silo construction in the humid tropics.
Omobowale Mobolaji Oluyimika,
Mijinyawa Yahaya, Faruk S.,
An Investigation into the Thermal Properties of Termite Mound Clay Applicable to Grain Silo Construction, International Journal of Materials Science and Applications.
Vol. 4, No. 4,
2015, pp. 266-271.
Y. Mijinyawa (2010): “Farm Structures”; University of Ibadan Publishing House (ISBN: 978 – 978 – 8414 – 35 – 3).
C. Karthikeyen, D. Veeraragavathatham, D. Karpagam and S. Ayisha Firdouse (2009): Indigenous storage structures. Division of Agricultural Extension, Krishi Vigyan Kendra, Sirugamani 639 115, Tiruchirappalli, Tamil Nadu. Indian Journal of Traditional Knowledge Vol. 8(2), April 2009, pp. 225-229.
Y. Mijinyawa, E.B. Lucas and F.O. Adegunloye (2007): Termite Mound Clay as Material for Grain Silo Construction, Agricultural Engineering International: the CIGREjournal. Manuscript BC 07 002 Vol IX July 2007; http://cigr-ejournal.tamu.edu/submissions/volume9/BC%2007%20002%20Mijinyawa%20final%2024July2007.pdf
J.T. Mills (1989): Spoilage and heating of stored agricultural products: prevention, detection and control. (Publication: 1823E) Includes Index. Bibliography: SB129.M54 1988 631.5’68 C88099204-2.
C.M. Geoffrey, L.O. Gumbe, H.J. Chepete and J.O. Agullo (2011): Rural structures in the tropics. Design and development. CTA Postbus 380, 6700 AJWageningen, The Netherlands; www.cta.int.
HGCA-Agriculture and Horticulture Development Board (2011): Grain storage guide for cereals and oilseeds. Third edition; www.hgca.com
B.A. Alabadan (2006): Evaluation of Wooden Silo during Storage of Maize (Zea mays) in Humid Tropical Climate; Agricultural Engineering International; the CIGR Ejournal, Manuscript BC 05 013, Vol VIII.
A.C. Yunus (2002): Heat Transfer: A Practical Approach second edition. Publisher: Mcgraw-Hill companies. ISBN-10: 0072458933 ISBN-13: 978-0072458930.
G. Ayugi, E.J. Banda, F.M. D’Ujanga (2011): Local Thermal Insulating Materials for Thermal Energy Storage. Department of Physics, Makerere University, P.O. Box 7062 Kampala, Uganda, email: email@example.com. Tel. +256 782 232 742. Rwanda Journal, Volume 23 Series C, 2011: Mathematical Sciences, Engineering and Technology.
M.A. Oladunjoye and O.A. Sanuade (2012): Thermal diffusivity, thermal effusivity and specific heat of soils in OlorunsogoPowerplant, Southwestern Nigeria. Department of Geology, University of Ibadan.
D. Salmon, G. Roebben, A. Lamberty, R. Brandt (2007): Certification of thermal conductivity and thermal diffusivity up to 1025 K of a glass-ceramic reference material BCR-724. European Commission, Directorate-General Joint Research Centre Institute for Reference Materials and Measurements.
D. Baggs. and N. Mortensen (2006): Thermal Mass in Building Design. The BDP Environment Design Guide is published by The Royal Australian Institute of Architects.
W. Rory., P. Kenny and V. Brophy (2006): Thermal Mass and Sustainable Building, Improving Energy and Occupant Comfort. UCD Energy Research Group, University College Dublin.
Y. Mijinyawa and M.O. Omobowale (2013): Determination of Some Physical and Mechanical Properties of Termite Mound Clay Relevant to Silo Construction; International Journal of Materials Engineering, Vol. 3 No. 5; pp. 103-107.
A.K. Aremu and H.U. Nwannewuihe (2011): Specific Heat of Ground Fresh Sheanut Kernel (Butyrospernumparadoxum) as Affected by Particle Size, Moisture Content and Temperature. Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS) 2 (1): 177-183 © Scholarlink Research Institute Journals, 2011 (ISSN: 2141-7016) jeteas.scholarlinkresearch.org.
J. Folaranmi (2009): Effect of Additives of the Thermal Conductivity of Clay; Leonardo Journal of Sciences, Issue 14, pp. 74 – 77.
D.R. Cook (2012): “Thermal Conductivity of Clay”; http://www.newton.dep.anl.gov/askasci/env99/env140.htm; Date Accessed: 10/07/2012.
Wikipedia (2015): List of Thermal Conductivities; http://en.wikipedia.org/wiki/List_of_thermal_conductivities; Date Accessed: 17/02/2015.
The Engineering Toolbox (2015b): ‘Solids-Specific Heats’- A Comprehensive List of some common Materials and their Specific Heats; http://www.engineeringtoolbox.com/specific-heat-solids-d_154.html; Date Accessed: 19/02/2015.