{"id":55875,"date":"2026-07-02T08:00:46","date_gmt":"2026-07-02T12:00:46","guid":{"rendered":"https:\/\/www.uqac.ca\/uqactualites\/?p=55875"},"modified":"2026-06-22T13:34:56","modified_gmt":"2026-06-22T17:34:56","slug":"joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these","status":"publish","type":"post","link":"https:\/\/www.uqac.ca\/uqactualites\/2026\/07\/02\/joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these\/","title":{"rendered":"Joao Augusto Lago Araujo Seixas, finissant au doctorat en ing\u00e9nierie, soutient sa th\u00e8se"},"content":{"rendered":"

Finissant au doctorant en ing\u00e9nierie, Joao Augusto Lago Araujo Seixas a effectu\u00e9 sa soutenance de th\u00e8se le 30 juin 2026. Sous la direction de recherche de Ahmed Rahem<\/a> (UQAC) et la codirection de Christophe Volat<\/a> et de Mathieu Fiset<\/a> (UQAC), sa th\u00e8se a pour titre \u00abB\u00e9ton g\u00e9opolym\u00e8re \u00e9lectriquement conducteur \u00e0 base de r\u00e9sidu de bauxite : d\u00e9veloppement, caract\u00e9risation et application\u00bb.<\/p>\n

Sous la pr\u00e9sidence d’Ali Saeidi<\/a> (UQAC), le jury d\u2019\u00e9valuation \u00e9tait compos\u00e9 de Reda Snaiki (\u00c9TS) et de Jos\u00e9e Duchesne (Universit\u00e9 Laval).<\/p>\n

\n
R\u00e9sum\u00e9 de la th\u00e8se<\/h5>\n

Dans les pays nordiques, l\u2019entretien hivernal des infrastructures routi\u00e8res, a\u00e9roportuaires et pi\u00e9tonni\u00e8res repr\u00e9sente un d\u00e9fi majeur. L\u2019accumulation de neige et de verglas nuit \u00e0 la s\u00e9curit\u00e9 et n\u00e9cessite des op\u00e9rations de d\u00e9gla\u00e7age co\u00fbteuses et chronophages. L’utilisation de b\u00e9tons \u00e9lectriquement conducteurs pour le d\u00e9veloppement de rev\u00eatements chauffants constitue une alternative prometteuse aux m\u00e9thodes traditionnelles qui sont bas\u00e9es sur l\u2019application de produits de d\u00e9gla\u00e7age et sur l\u2019utilisation de machineries lourdes. Toutefois, les formulations existantes, bien que performantes, restent on\u00e9reuses, limitant ainsi leur d\u00e9ploiement \u00e0 grande \u00e9chelle.<\/p>\n

Ce projet vise \u00e0 d\u00e9velopper un b\u00e9ton g\u00e9opolym\u00e8re \u00e9lectriquement conducteur int\u00e9grant du r\u00e9sidu de bauxite afin de proposer une solution plus \u00e9conomique et durable. L\u2019approche adopt\u00e9e repose sur l\u2019optimisation de la formulation par l\u2019analyse quantitative de l\u2019influence de chaque composant sur les propri\u00e9t\u00e9s cl\u00e9s du mat\u00e9riau, notamment la r\u00e9sistance \u00e0 la compression, l\u2019ouvrabilit\u00e9 et la conductivit\u00e9 \u00e9lectrique. Une formulation optimale a \u00e9t\u00e9 \u00e9labor\u00e9e et valid\u00e9e \u00e0 travers des essais en laboratoire, ainsi que par la fabrication de prototypes de dalles chauffantes test\u00e9es sous conditions contr\u00f4l\u00e9es de neige et de verglas. Les r\u00e9sultats obtenus d\u00e9montrent le fort potentiel du r\u00e9sidu de bauxite dans la conception de b\u00e9tons g\u00e9opolym\u00e8res conducteurs, tout en pr\u00e9sentant une performance m\u00e9canique comparable au b\u00e9ton conventionnel \u00e0 base de ciment portland. Ces mat\u00e9riaux pourraient \u00eatre int\u00e9gr\u00e9s dans les futures infrastructures de transport comme solution auto-d\u00e9givrante, r\u00e9duisant ainsi l\u2019utilisation de produits chimiques et am\u00e9liorant la s\u00e9curit\u00e9 des usagers en p\u00e9riode hivernale.<\/p>\n

\n

F\u00e9licitations \u00e0 Joao Augusto Lago Araujo Seixas pour la soutenance de sa th\u00e8se de doctorat!<\/p>\n","protected":false},"excerpt":{"rendered":"

Finissant au doctorant en ing\u00e9nierie, Joao Augusto Lago Araujo Seixas a effectu\u00e9 sa soutenance de th\u00e8se le 30 juin 2026. Sous la direction de recherche de Ahmed Rahem (UQAC) et la codirection de Christophe Volat et de Mathieu Fiset (UQAC), sa th\u00e8se a pour titre \u00abB\u00e9ton g\u00e9opolym\u00e8re \u00e9lectriquement conducteur \u00e0 base de r\u00e9sidu de bauxite […]<\/p>\n","protected":false},"author":5,"featured_media":55880,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2913],"tags":[],"yoast_head":"\r\nJoao Augusto Lago Araujo Seixas, finissant au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - UQACtualit\u00e9s<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.uqac.ca\/uqactualites\/2026\/07\/02\/joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these\/\" \/>\r\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Joao Augusto Lago Araujo Seixas, finissant au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - UQACtualit\u00e9s\" \/>\r\n<meta property=\"og:description\" content=\"Finissant au doctorant en ing\u00e9nierie, Joao Augusto Lago Araujo Seixas a effectu\u00e9 sa soutenance de th\u00e8se le 30 juin 2026. Sous la direction de recherche de Ahmed Rahem (UQAC) et la codirection de Christophe Volat et de Mathieu Fiset (UQAC), sa th\u00e8se a pour titre \u00abB\u00e9ton g\u00e9opolym\u00e8re \u00e9lectriquement conducteur \u00e0 base de r\u00e9sidu de bauxite […]\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.uqac.ca\/uqactualites\/2026\/07\/02\/joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these\/\" \/>\r\n<meta property=\"og:site_name\" content=\"UQACtualit\u00e9s\" \/>\r\n<meta property=\"article:published_time\" content=\"2026-07-02T12:00:46+00:00\" \/>\r\n<meta property=\"article:modified_time\" content=\"2026-06-22T17:34:56+00:00\" \/>\r\n<meta property=\"og:image\" content=\"https:\/\/www.uqac.ca\/uqactualites\/wp-content\/uploads\/2026\/06\/A-la-une-UQACtualite-2026-06-22T132625.211.png\" \/>\r\n\t<meta property=\"og:image:width\" content=\"1366\" \/>\r\n\t<meta property=\"og:image:height\" content=\"768\" \/>\r\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\r\n<meta name=\"author\" content=\"Service des communications et des relations publiques\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Service des communications et des relations publiques\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.uqac.ca\/uqactualites\/2026\/07\/02\/joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these\/\",\"url\":\"https:\/\/www.uqac.ca\/uqactualites\/2026\/07\/02\/joao-augusto-lago-araujo-seixas-finissant-au-doctorat-en-ingenierie-soutient-sa-these\/\",\"name\":\"Joao Augusto Lago Araujo Seixas, finissant au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - 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