{"id":128335,"date":"2026-04-08T14:48:28","date_gmt":"2026-04-08T14:48:28","guid":{"rendered":"https:\/\/www.africa-press.net\/burkina-faso\/politique\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite"},"modified":"2026-04-08T15:19:39","modified_gmt":"2026-04-08T15:19:39","slug":"evaluation-des-briques-en-adobe-stabilisees-a-luniversite","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite","title":{"rendered":"\u00c9valuation des Briques en Adobe Stabilis\u00e9es \u00e0 l&rsquo;Universit\u00e9"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Burkina Faso. <\/strong><\/span>Pour la soutenance de son me\u0301moire de Master de physique applique\u0301e a\u0300 l\u2019universite\u0301 Joseph-Ki-Zerbo, l\u2019e\u0301tudiant Oumarou Dianda a mene\u0301 sa recherche sur le the\u0300me \u00ab Caracte\u0301risation thermome\u0301canique des briques en adobe stabilise\u0301es avec la paille de riz et la coque d\u2019arachide \u00bb au sein du Laboratoire de mate\u0301riaux et environnement (LAME). Il est parti du constat que le Burkina Faso fait face a\u0300 des de\u0301fis climatiques significatifs, caracte\u0301rise\u0301s notamment par des tempe\u0301ratures maximales et des tempe\u0301ratures minimales ; une situation qui influence directement les proprie\u0301te\u0301s thermiques et me\u0301caniques des mate\u0301riaux de construction, comme les briques adobes.<\/p>\n<p>Les briques adobes sont, bien qu\u2019efficaces pour re\u0301guler la tempe\u0301rature, sensibles a\u0300 l\u2019humidite\u0301 et a\u0300 l\u2019e\u0301rosion. Une mauvaise qualite\u0301 de la terre ou une exposition excessive a\u0300 l\u2019humidite\u0301 peut diminuer leur durabilite\u0301. En outre, la norme de construction au Burkina Faso (Agence burkinabe\u0300 de normalisation, de la me\u0301trologie et de la qualite\u0301: ABNORM) reconnai\u0302t avec re\u0301serve les briques adobes comme un mate\u0301riau approprie\u0301 pour des ba\u0302timents re\u0301sidentiels ou commerciaux, limitant ainsi leur utilisation. Par le choix de cette e\u0301tude, le candidat Oumarou Dianda vise a\u0300 e\u0301valuer les performances physiques, me\u0301caniques et thermiques des briques en adobe simple et celles stabilise\u0301es avec des fibres ve\u0301ge\u0301tales locales, a\u0300 savoir la paille de riz et la coque d\u2019arachide, afin de comprendre l\u2019impact de ces ajouts sur la qualite\u0301 du mate\u0301riau.<\/p>\n<p>En cet ultime virage, Oumarou Dianda a e\u0301te\u0301 appele\u0301 a\u0300 de\u0301fendre son travail devant un jury pre\u0301side\u0301 par David Yemboini Kader Toguye\u0301ni, professeur titulaire a\u0300 l\u2019E\u0301cole polytechnique de Ouagadougou, et compose\u0301 du Zacharie Koalaga, professeur titulaire a\u0300 l\u2019universite\u0301 Joseph-Ki-Zerbo (directeur de me\u0301moire) ; de Dr Rimyalegdo Kie\u0301bre\u0301, mai\u0302tre-assistant en Ge\u0301nie me\u0301canique a\u0300 l\u2019universite\u0301 Le\u0301de\u0301a-Bernard-Oue\u0301draogo de Ouahigouya (co-directeur de me\u0301moire) et de Dr Eloi Tiendre\u0301be\u0301ogo, mai\u0302tre de confe\u0301rences a\u0300 l\u2019E\u0301cole normale supe\u0301rieure de Koudougou (examinateur).<\/p>\n<p>Comme requis en la matie\u0300re, le candidat a, dans la premie\u0300re partie, pre\u0301sente\u0301 la quintessence de son travail qui a, faut-il le rappeler, porte\u0301 sur la caracte\u0301risation thermome\u0301canique des briques en adobe stabilise\u0301es avec la paille de riz et la coque d\u2019arachide. Ainsi, il a d\u2019abord explique\u0301 que le the\u0300me vise a\u0300, de fac\u0327on ge\u0301ne\u0301rale, caracte\u0301riser les proprie\u0301te\u0301s physiques, me\u0301caniques et thermiques de diffe\u0301rentes briques qu\u2019il a confectionne\u0301es a\u0300 base d\u2019adobe exclusivement et d\u2019adobe stabilise\u0301e avec des fibres ve\u0301ge\u0301tales locales, a\u0300 savoir la coque d\u2019arachide et la paille de riz.<\/p>\n<p>Pour parvenir a\u0300 l\u2019objectif, il a spe\u0301cifiquement confectionne\u0301 trois compositions de briques, a\u0300 savoir des briques-te\u0301moins a\u0300 base d\u2019adobe uniquement, des briques en adobe stabilise\u0301e avec la paille de riz et des briques en adobe stabilise\u0301e avec la coque d\u2019arachide. Il a e\u0301galement mesure\u0301 les proprie\u0301te\u0301s physiques, me\u0301caniques et thermiques des diffe\u0301rents compostions. Oumarou Dianda a, en outre, simule\u0301 les proprie\u0301te\u0301s thermiques des diffe\u0301rentes compositions sous le logiciel COMSOL Multiphysics avant de comparer les diffe\u0301rents re\u0301sultats obtenus pour chaque composition.<\/p>\n<p>L\u2019e\u0301tudiant a ensuite ba\u0302ti son travail autour de trois chapitres. Ainsi, dans le premier chapitre, il a e\u0301te\u0301 pre\u0301sente\u0301 les briques en adobe dans leur contexte historique et technique, en montrant leurs avantages, mais aussi leurs limites.<\/p>\n<p>L\u2019e\u0301tude a montre\u0301 que l\u2019adobe est un mate\u0301riau naturel adapte\u0301 aux zones chaudes gra\u0302ce a\u0300 ses bonnes proprie\u0301te\u0301s thermiques. Le ro\u0302le des fibres ve\u0301ge\u0301tales a aussi e\u0301te\u0301 visite\u0301, en observant leur influence sur les performances thermome\u0301caniques. Le chapitre a e\u0301galement introduit COMSOL comme un outil indispensable pour la simulation.<\/p>\n<p>Le second chapitre a, lui, de\u0301crit la me\u0301thodologie inte\u0301grant la se\u0301lection des mate\u0301riaux, la fabrication des e\u0301chantillons de briques, les essais physiques, me\u0301caniques et thermiques. Ce chapitre a permis de documenter les protocoles expe\u0301rimentaux ainsi que les parame\u0300tres utilise\u0301s pour les simulations nume\u0301riques.<\/p>\n<p>Le troisie\u0300me chapitre a, quant a\u0300 lui, pre\u0301sente\u0301 les re\u0301sultats des essais et des simulations. Il rele\u0300ve que l\u2019ajout de fibres ve\u0301ge\u0301tales diminue la masse volumique, la re\u0301sistance a\u0300 la compression, la conductivite\u0301 thermique et la capacite\u0301 thermique a\u0300 pression constante des briques en adobe, mais augmente leur teneur en eau et leur diffusivite\u0301 thermique.<\/p>\n<p>Du point de vue thermique, l\u2019ajout de fibres ame\u0301liore l\u2019isolation thermique, mais peut nuire a\u0300 la solidite\u0301 me\u0301canique. Les re\u0301sultats de la simulation sous COMSOL ont confirme\u0301 ces tendances, en montrant une re\u0301gression de la tempe\u0301rature a\u0300 travers l\u2019e\u0301paisseur des diffe\u0301rentes briques, en particulier celles contenant des fibres ve\u0301ge\u0301tales. Ils ont aussi permis la de\u0301couverte d\u2019un point d\u2019e\u0301quilibre thermique ainsi que la variation de la chaleur a\u0300 diffe\u0301rents instants avant et apre\u0300s le point d\u2019e\u0301quilibre thermique.<\/p>\n<p>\u00ab Un protocole expe\u0301rimental a permis la fabrication des e\u0301chantillons, la re\u0301alisation des essais de masse volumique, de teneur en eau, de re\u0301sistance a\u0300 la compression, de conductivite\u0301 et diffusivite\u0301 thermique, ainsi que la mode\u0301lisation des transferts thermiques a\u0300 l\u2019aide du logiciel COMSOL Multiphysics. Les re\u0301sultats ont montre\u0301 que l\u2019ajout de fibres ve\u0301ge\u0301tales ame\u0301liore l\u2019isolation thermique des briques en diminuant la conductivite\u0301 thermique, et re\u0301duit la masse volumique et la re\u0301sistance a\u0300 la compression, affectant les performances me\u0301caniques. Cet ajout augmente e\u0301galement la teneur en eau, notamment pour les briques a\u0300 base de paille de riz et de coques d\u2019arachide \u00bb, peut-on e\u0301galement retenir de la pre\u0301sentation.<\/p>\n<p>Les simulations nume\u0301riques ont confirme\u0301 la faible conductivite\u0301 thermique des briques obtenues, particulie\u0300rement celles enrichies en fibres, poursuit l\u2019e\u0301tudiant. Ces re\u0301sultats soulignent le potentiel de ces mate\u0301riaux pour des constructions durables dans les zones a\u0300 forte chaleur, tout en ne\u0301cessitant des ajustements pour ame\u0301liorer leur re\u0301sistance me\u0301canique, re\u0301ve\u0300le-t-il.<\/p>\n<p>En termes de conclusions et de perspectives, on note que le me\u0301moire s\u2019inscrit dans le cadre de la valorisation des mate\u0301riaux locaux, dont les performances restent encore peu documente\u0301es scientifiquement. D\u2019ou\u0300 la pertinence du the\u0300me, mis en relief e\u0301galement par le contexte de changements climatiques, de pressions e\u0301conomiques et de recherche de solutions e\u0301cologiques adapte\u0301es aux re\u0301alite\u0301s locales.<\/p>\n<p>Selon le candidat, le travail de\u0301gage comme perspective, l\u2019optimisation des fibres et la matrice en terre pour e\u0301quilibrer les performances thermiques et me\u0301caniques et l\u2019e\u0301valuation de la durabilite\u0301 a\u0300 long terme de ces briques en conditions climatiques re\u0301elles.<\/p>\n<p>La pre\u0301sentation a fait place a\u0300 la deuxie\u0300me partie, a\u0300 savoir la re\u0301action du jury. Elle a consiste\u0301 en l\u2019examen du travail, dans la forme et dans le fond, par chaque membre. Tous ont d\u2019abord reconnu et salue\u0301 la pertinence du the\u0300me et la rigueur avec laquelle l\u2019e\u0301tudiant s\u2019y est investi. Ils ont ensuite pose\u0301 des questions d\u2019e\u0301clairage et fait des suggestions a\u0300 inte\u0301grer dans la version finale du me\u0301moire.<\/p>\n<p>La dernie\u0300re e\u0301tape, moment crucial, a e\u0301te\u0301 la de\u0301libe\u0301ration du jury. C\u2019est dans une atmosphe\u0300re de suspense ge\u0301ne\u0301ral donc, que Pr David Yemboini Kader Toguye\u0301ni a, entoure\u0301 des autres membres, de\u0301clare\u0301 le candidat digne du titre de Mai\u0302tre, avec la mention tre\u0300s bien.<\/p>\n\r\n                <style type=\"text\/css\">\r\n                    \r\n                    #td_uid_1_69d6ac45d01b5  .td-doubleSlider-2 .td-item1 {\r\n                        background: url(https:\/\/static.africa-press.net\/burkina\/sites\/42\/2026\/04\/sm_1775648271.607524-80x60.jpg) 0 0 no-repeat;\r\n                    }\r\n                    #td_uid_1_69d6ac45d01b5  .td-doubleSlider-2 .td-item2 {\r\n                        background: url(https:\/\/static.africa-press.net\/burkina\/sites\/42\/2026\/04\/sm_1775648275.141768-80x60.jpg) 0 0 no-repeat;\r\n                    }\r\n                    #td_uid_1_69d6ac45d01b5  .td-doubleSlider-2 .td-item3 {\r\n                        background: 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                     <\/div>\r\n                        <\/div>\r\n\r\n                    <\/div>\r\n\r\n                <\/div>\r\n                \n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Burkina Faso<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Burkina Faso. Pour la soutenance de son me\u0301moire de Master de physique applique\u0301e a\u0300 l\u2019universite\u0301 Joseph-Ki-Zerbo, l\u2019e\u0301tudiant Oumarou Dianda a mene\u0301 sa recherche sur le the\u0300me \u00ab Caracte\u0301risation thermome\u0301canique des briques en adobe stabilise\u0301es avec la paille de riz et la coque d\u2019arachide \u00bb au sein du Laboratoire de mate\u0301riaux et environnement (LAME). [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":128334,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,8,10],"tags":[29],"class_list":["post-128335","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-communaute","category-photo","category-toutes-les-actualites","tag-burkina-faso"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u00c9valuation des Briques en Adobe Stabilis\u00e9es \u00e0 l&#039;Universit\u00e9 - Burkina Faso<\/title>\n<meta name=\"description\" content=\"Pour la soutenance de son me\u0301moire de Master de physique applique\u0301e a\u0300 l\u2019universite\u0301 Joseph-Ki-Zerbo, l\u2019e\u0301tudiant Oumaro ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u00c9valuation des Briques en Adobe Stabilis\u00e9es \u00e0 l&#039;Universit\u00e9\" \/>\n<meta property=\"og:description\" content=\"Pour la soutenance de son me\u0301moire de Master de physique applique\u0301e a\u0300 l\u2019universite\u0301 Joseph-Ki-Zerbo, l\u2019e\u0301tudiant Oumaro ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\" \/>\n<meta property=\"og:site_name\" content=\"Burkina Faso\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-08T14:48:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-08T15:19:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2026\/04\/sm_1775648285.716556.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"\u00c9valuation des Briques en Adobe Stabilis\u00e9es \u00e0 l&rsquo;Universit\u00e9\",\"datePublished\":\"2026-04-08T14:48:28+00:00\",\"dateModified\":\"2026-04-08T15:19:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\"},\"wordCount\":1362,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2026\/04\/sm_1775648285.716556.jpg\",\"keywords\":[\"Burkina Faso\"],\"articleSection\":[\"Communaut\u00e9\",\"Photo\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\",\"url\":\"https:\/\/www.africa-press.net\/burkina-faso\/photo\/evaluation-des-briques-en-adobe-stabilisees-a-luniversite\",\"name\":\"\u00c9valuation des Briques en Adobe Stabilis\u00e9es \u00e0 l'Universit\u00e9 - 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