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Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay

This article is focussed on evaluating the effects of water repellent admixture and different curing regimes on characteristics of clay from termite hills used for production of earth bricks. Water absorption, thickness swelling and compressive strength characteristics of the specimens with differen...

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Autores principales: Akinyemi, Banjo A., Bamidele, Adeola, Oluwanifemi, Adeoye
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6360403/
https://www.ncbi.nlm.nih.gov/pubmed/30775576
http://dx.doi.org/10.1016/j.heliyon.2019.e01182
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author Akinyemi, Banjo A.
Bamidele, Adeola
Oluwanifemi, Adeoye
author_facet Akinyemi, Banjo A.
Bamidele, Adeola
Oluwanifemi, Adeoye
author_sort Akinyemi, Banjo A.
collection PubMed
description This article is focussed on evaluating the effects of water repellent admixture and different curing regimes on characteristics of clay from termite hills used for production of earth bricks. Water absorption, thickness swelling and compressive strength characteristics of the specimens with different compositions of cement, hydrated lime and water repellent additive subjected to different curing regimes were measured. The samples were characterised by SEM and FTIR. The least water absorption was at 3.3% while thickness swelling ranged from 0.78 to 3.21 % for the samples. Saturated curing condition resulted in an average compressive strength of 35.5 N/mm(2), cured curing recorded an average value of 32.9 N/mm(2) while dry curing condition produced an average compressive strength of 26.9 N/mm(2) and the wet curing condition resulted in 25 N/mm(2). SEM characterisation of sample containing 70% termite soil, 30% cement and 0.05 Hydropruf indicated fewer voids, regular and smooth appearance in comparison with others. FTIR analysis showed distinctive broad bands at wave numbers of 3439 cm(−1) for O-H stretching, and 1033.83–1008.80 cm(−1) for O–H bending for all samples tested. The best performing composition in terms of the dimensional stability test was 70% termite mound clay, 10% cement, 20% hydrated lime and 0.05 Hydropruf additive. The highest mechanical strength was from composition of 70% termite mound clay, 30% cement, no hydrated lime and 0.05 Hydropruf additive. It is concluded that saturated and cured method showed better performance than the wet and dry curing regimes. The termite secretions similarly improved the clay composition in conjunction with cement, lime and chemical admixture in the internal structure of the bricks.
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spelling pubmed-63604032019-02-15 Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay Akinyemi, Banjo A. Bamidele, Adeola Oluwanifemi, Adeoye Heliyon Article This article is focussed on evaluating the effects of water repellent admixture and different curing regimes on characteristics of clay from termite hills used for production of earth bricks. Water absorption, thickness swelling and compressive strength characteristics of the specimens with different compositions of cement, hydrated lime and water repellent additive subjected to different curing regimes were measured. The samples were characterised by SEM and FTIR. The least water absorption was at 3.3% while thickness swelling ranged from 0.78 to 3.21 % for the samples. Saturated curing condition resulted in an average compressive strength of 35.5 N/mm(2), cured curing recorded an average value of 32.9 N/mm(2) while dry curing condition produced an average compressive strength of 26.9 N/mm(2) and the wet curing condition resulted in 25 N/mm(2). SEM characterisation of sample containing 70% termite soil, 30% cement and 0.05 Hydropruf indicated fewer voids, regular and smooth appearance in comparison with others. FTIR analysis showed distinctive broad bands at wave numbers of 3439 cm(−1) for O-H stretching, and 1033.83–1008.80 cm(−1) for O–H bending for all samples tested. The best performing composition in terms of the dimensional stability test was 70% termite mound clay, 10% cement, 20% hydrated lime and 0.05 Hydropruf additive. The highest mechanical strength was from composition of 70% termite mound clay, 30% cement, no hydrated lime and 0.05 Hydropruf additive. It is concluded that saturated and cured method showed better performance than the wet and dry curing regimes. The termite secretions similarly improved the clay composition in conjunction with cement, lime and chemical admixture in the internal structure of the bricks. Elsevier 2019-01-31 /pmc/articles/PMC6360403/ /pubmed/30775576 http://dx.doi.org/10.1016/j.heliyon.2019.e01182 Text en © 2019 The Authors. Published by Elsevier Ltd. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Akinyemi, Banjo A.
Bamidele, Adeola
Oluwanifemi, Adeoye
Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title_full Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title_fullStr Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title_full_unstemmed Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title_short Influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
title_sort influence of water repellent chemical additive and different curing regimes on dimensional stability and strength of earth bricks from termite mound-clay
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6360403/
https://www.ncbi.nlm.nih.gov/pubmed/30775576
http://dx.doi.org/10.1016/j.heliyon.2019.e01182
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