Conference Proceedings and Seminar Papers

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Browsing Conference Proceedings and Seminar Papers by Author "ABODUNRIN, Joshua A. BATAGARAWA, Amina L. SAGADA, Musa L."

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    ENHANCING THE THERMO-PHYSICAL PROPERTIES OF RAMMED EARTH BY STABILIZING WITH CORN HUSK ASH
    (2016) ABODUNRIN, Joshua A. BATAGARAWA, Amina L. SAGADA, Musa L.
    Conventional building materials such as sandcrele and concrete blocks have high thermal cmnhn tivih and low specific heat capacity which increase thermal discomfort in comparison In rammed earth in buildings. However, rammed earth is susceptible to cracking as a result of shrinkage due the healing effect of the sun. The aim of this study is to investigate the potential of corn husk ash as a stabilizer foi the production of rammed earth blocks to improve thermal comfort in buildings. Three different levels of stabilization (0%, 10% and 20%) using corn husk ash are adopted for this study, beyond which the strength of the material is known to fail. The samples were moulded and subjected to thermal conductivity, specific heat capacity and density tests. In general there is a significant improvement in the thermal conductivity of stabilized rammed earth blocks. From the thermal conductivity test results. thermal conductivities of 0.996w/k.m', 0.637w/k.m'', and 0.489w/k.m~' were obtained for samples admixed with 0%, 10%, and 20% corn husk ash respectively. The 0"A 10%, and 20% samples had heal capacities of 962.1 j/kg.K, 984.9 j/kg.K and 993.-If/kg.K and density increased with the increase in the amount of ash from 862.3kg/mi to 942.5kg/m3 and 959.5kg/nr respectively. Overall the 20% sample performs best when compared to the 0% and 10%. Stabilizing rammed earth with corn husk ash can improve the thermal properties of rammed earth blocks, making them suitable for use as a building material in enhancing thermal comfort.