Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi

Introduction. The article is about an assessment of the impact of impurities contained in the local construction materials on the mechanical characteristics of the concrete used in reinforced concrete structures in Burundi. Materials and methods. The methodology of the study consisted in varying...

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Autores principales:	Emmanuel Mikerego, Nestor Niyonzima, Jean Claude Ntirampeba
Formato:	article
Lenguaje:	EN RU
Publicado:	Moscow State University of Civil Engineering (MGSU) 2021
Materias:	impurities local construction materials in burundi reinforced concrete structures Architecture NA1-9428 Construction industry HD9715-9717.5
Acceso en línea:	https://doaj.org/article/f19ca773c6864b2292ff11d920ee72f6
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spelling	oai:doaj.org-article:f19ca773c6864b2292ff11d920ee72f62021-12-01T11:59:47ZImpact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi1997-093510.22227/1997-0935.2021.10.1357-1362https://doaj.org/article/f19ca773c6864b2292ff11d920ee72f62021-10-01T00:00:00Zhttps://doi.org/10.22227/1997-0935.2021.10.1357-1362https://doaj.org/toc/1997-0935Introduction. The article is about an assessment of the impact of impurities contained in the local construction materials on the mechanical characteristics of the concrete used in reinforced concrete structures in Burundi. Materials and methods. The methodology of the study consisted in varying the quantity of impurities for the manufacturing of the concrete experimental cubic samples. The grain sizes of the studied ordinary concrete were in the favourable zones according to the recommended granulometry for standard concretes. Simulation of impurities was made by adding in the mixing water solid particles taken from a local rock called “red earth”. The particles were composed by (24 %) of clays, (38 %) of silts and (38 %) of sands. As for the used cement in this study, it was the type CEM I (32.5). The quantities of impurities were expressed in grams per litre of mixing water (g/l) and were varying from (0 g/l) to (100 g/l) with a step of (20 g/l). The prepared experimental concrete samples were stored in the laboratory of materials at the University of Burundi and were subjected to compression testing under hydraulic press after 28 days. Results. The impact of impurities consisting of (24 %) of clays, (38 %) of silts and (38 %) of sands is identified. Each increase of (20 g) of impurities in a litre of mixing water induces an average decrease of (4 %) on the compressive strength and the Young’s modulus for an ordinary concrete. Conclusions. The impact of impurities contained in the local construction materials used in the manufacturing of the concrete for reinforced concrete structures in Burundi is studied. Each increase of (20 g) of impurities in a litre of mixing water induces an average decrease of (4 %) on the compressive strength and the Young’s modulus of an ordinary concrete. For Burundi, a curve for the approximation of the bearing capacity of the concrete used in reinforced concrete structures according to the quantity of impurities contained in the local construction materials was established. Hence, it is advisable to start by the specification of the quantity of impurities contained in the construction materials before making the concrete for reinforced concrete structures in order to predict the mechanical performances of the concrete used in reinforced concrete structures.Emmanuel MikeregoNestor NiyonzimaJean Claude NtirampebaMoscow State University of Civil Engineering (MGSU)articleimpuritieslocal construction materials in burundireinforced concrete structuresArchitectureNA1-9428Construction industryHD9715-9717.5ENRUVestnik MGSU , Vol 16, Iss 10, Pp 1357-1362 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU
topic	impurities local construction materials in burundi reinforced concrete structures Architecture NA1-9428 Construction industry HD9715-9717.5
spellingShingle	impurities local construction materials in burundi reinforced concrete structures Architecture NA1-9428 Construction industry HD9715-9717.5 Emmanuel Mikerego Nestor Niyonzima Jean Claude Ntirampeba Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
description	Introduction. The article is about an assessment of the impact of impurities contained in the local construction materials on the mechanical characteristics of the concrete used in reinforced concrete structures in Burundi. Materials and methods. The methodology of the study consisted in varying the quantity of impurities for the manufacturing of the concrete experimental cubic samples. The grain sizes of the studied ordinary concrete were in the favourable zones according to the recommended granulometry for standard concretes. Simulation of impurities was made by adding in the mixing water solid particles taken from a local rock called “red earth”. The particles were composed by (24 %) of clays, (38 %) of silts and (38 %) of sands. As for the used cement in this study, it was the type CEM I (32.5). The quantities of impurities were expressed in grams per litre of mixing water (g/l) and were varying from (0 g/l) to (100 g/l) with a step of (20 g/l). The prepared experimental concrete samples were stored in the laboratory of materials at the University of Burundi and were subjected to compression testing under hydraulic press after 28 days. Results. The impact of impurities consisting of (24 %) of clays, (38 %) of silts and (38 %) of sands is identified. Each increase of (20 g) of impurities in a litre of mixing water induces an average decrease of (4 %) on the compressive strength and the Young’s modulus for an ordinary concrete. Conclusions. The impact of impurities contained in the local construction materials used in the manufacturing of the concrete for reinforced concrete structures in Burundi is studied. Each increase of (20 g) of impurities in a litre of mixing water induces an average decrease of (4 %) on the compressive strength and the Young’s modulus of an ordinary concrete. For Burundi, a curve for the approximation of the bearing capacity of the concrete used in reinforced concrete structures according to the quantity of impurities contained in the local construction materials was established. Hence, it is advisable to start by the specification of the quantity of impurities contained in the construction materials before making the concrete for reinforced concrete structures in order to predict the mechanical performances of the concrete used in reinforced concrete structures.
format	article
author	Emmanuel Mikerego Nestor Niyonzima Jean Claude Ntirampeba
author_facet	Emmanuel Mikerego Nestor Niyonzima Jean Claude Ntirampeba
author_sort	Emmanuel Mikerego
title	Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
title_short	Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
title_full	Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
title_fullStr	Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
title_full_unstemmed	Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi
title_sort	impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in burundi
publisher	Moscow State University of Civil Engineering (MGSU)
publishDate	2021
url	https://doaj.org/article/f19ca773c6864b2292ff11d920ee72f6
work_keys_str_mv	AT emmanuelmikerego impactofimpuritiesoflocalconstructionmaterialsonthebearingcapacityoftheconcreteusedinstructuresinburundi AT nestorniyonzima impactofimpuritiesoflocalconstructionmaterialsonthebearingcapacityoftheconcreteusedinstructuresinburundi AT jeanclaudentirampeba impactofimpuritiesoflocalconstructionmaterialsonthebearingcapacityoftheconcreteusedinstructuresinburundi
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Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi

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