A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials

A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials

Refractories are mineral and chemical based materials, with high heat resistance properties. Refractory manufacturing typically uses clay as the main raw material. The study aims to investigate six unexplored Nigerian clay based on the suitability of their chemical, physical, mechanical and thermal...

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Main Author: Ajala, , Amkpa Job
Format: Thesis
Language:English
English
English
Published: 2017
Subjects:
TA715-787 Earthwork
Foundations
Online Access:http://eprints.uthm.edu.my/310/1/24p%20AMKPA%20JOB%20AJALA.pdf
http://eprints.uthm.edu.my/310/2/AMKPA%20JOB%20AJALA%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/310/3/AMKPA%20JOB%20AJALA%20WATERMARK.pdf
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spelling my-uthm-ep.3102021-07-21T03:37:32Z A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials 2017-07 Ajala, , Amkpa Job TA715-787 Earthwork. Foundations Refractories are mineral and chemical based materials, with high heat resistance properties. Refractory manufacturing typically uses clay as the main raw material. The study aims to investigate six unexplored Nigerian clay based on the suitability of their chemical, physical, mechanical and thermal properties as refractories. Six clay deposit locations in Nigeria were selected namely Kpata, Riyom, Gombe, Aloji, Barkin-lade and Quan’pan. The samples were obtained through a two meters depth excavation method. Experimental specimens were produced from these samples through dry-pressing methods followed by firing at 900-1200°C. All specimens were tested to identify the chemical, physical, mechanical and thermal properties of ASTM standards. X-ray fluorescence (XRF) and X-ray diffraction (XRD) analysis show that all specimens contain alumino-silicates as the dominant composition, with 10% loss on ignition. Through the Archimedes test, the percentage of porosity is found in the range of 20-30%, with bulk densities about 1.7-2.3g/cm3. Cold crushing strength (CCS) and modulus of rupture (MOR) give readings of 15-59 MPa and 6.2-9MPa respectively. Meanwhile, the analysis on thermal properties found specimens having thermal shock resistance on a 20-30 scale cycle, pyrometric cone equivalence (PCE) at a temperature range of 1500-1700°C and thermal conductivity at a range of 0.01-0.9W/m.K. The overall experiment results are within the range of ASTM standards and this illustrates that all of the clay is potentially a refractory material. 2017-07 Thesis http://eprints.uthm.edu.my/310/ http://eprints.uthm.edu.my/310/1/24p%20AMKPA%20JOB%20AJALA.pdf text en public http://eprints.uthm.edu.my/310/2/AMKPA%20JOB%20AJALA%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/310/3/AMKPA%20JOB%20AJALA%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution Universiti Tun Hussein Onn Malaysia
collection UTHM Institutional Repository
language English
English
English
topic TA715-787 Earthwork
Foundations
spellingShingle TA715-787 Earthwork
Foundations
Ajala, , Amkpa Job
A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
description Refractories are mineral and chemical based materials, with high heat resistance properties. Refractory manufacturing typically uses clay as the main raw material. The study aims to investigate six unexplored Nigerian clay based on the suitability of their chemical, physical, mechanical and thermal properties as refractories. Six clay deposit locations in Nigeria were selected namely Kpata, Riyom, Gombe, Aloji, Barkin-lade and Quan’pan. The samples were obtained through a two meters depth excavation method. Experimental specimens were produced from these samples through dry-pressing methods followed by firing at 900-1200°C. All specimens were tested to identify the chemical, physical, mechanical and thermal properties of ASTM standards. X-ray fluorescence (XRF) and X-ray diffraction (XRD) analysis show that all specimens contain alumino-silicates as the dominant composition, with 10% loss on ignition. Through the Archimedes test, the percentage of porosity is found in the range of 20-30%, with bulk densities about 1.7-2.3g/cm3. Cold crushing strength (CCS) and modulus of rupture (MOR) give readings of 15-59 MPa and 6.2-9MPa respectively. Meanwhile, the analysis on thermal properties found specimens having thermal shock resistance on a 20-30 scale cycle, pyrometric cone equivalence (PCE) at a temperature range of 1500-1700°C and thermal conductivity at a range of 0.01-0.9W/m.K. The overall experiment results are within the range of ASTM standards and this illustrates that all of the clay is potentially a refractory material.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Ajala, , Amkpa Job
author_facet Ajala, , Amkpa Job
author_sort Ajala, , Amkpa Job
title A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
title_short A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
title_full A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
title_fullStr A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
title_full_unstemmed A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
title_sort study on thermal conductivity of six unexplored nigerian clays for possible refractory and insulating materials
granting_institution Universiti Tun Hussein Onn Malaysia
granting_department Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate 2017
url http://eprints.uthm.edu.my/310/1/24p%20AMKPA%20JOB%20AJALA.pdf
http://eprints.uthm.edu.my/310/2/AMKPA%20JOB%20AJALA%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/310/3/AMKPA%20JOB%20AJALA%20WATERMARK.pdf
_version_ 1747830579121881088

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