{"id":13942,"date":"2025-02-13T15:12:15","date_gmt":"2025-02-13T14:12:15","guid":{"rendered":"https:\/\/www.uni.lu\/fr\/?post_type=news&#038;p=13942"},"modified":"2025-02-21T10:22:52","modified_gmt":"2025-02-21T09:22:52","slug":"un-revetement-innovant-pour-proteger-les-ponts","status":"publish","type":"news","link":"https:\/\/www.uni.lu\/fr\/news\/un-revetement-innovant-pour-proteger-les-ponts\/","title":{"rendered":"Agir avant la catastrophe: un rev\u00eatement innovant pour prot\u00e9ger les ponts"},"content":{"rendered":"\n<section class=\"wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\">\n<p>Des \u00e9lastom\u00e8res similaires \u00e0 un rev\u00eatement de peinture, d\u00e9velopp\u00e9s \u00e0 l&rsquo;Universit\u00e9 du Luxembourg et \u00e0 l&rsquo;Universit\u00e9 de technologie de Darmstadt, ont d\u00e9montr\u00e9 leur efficacit\u00e9 pour d\u00e9tecter et surveiller les fissures potentielles dans le b\u00e9ton des b\u00e2timents existants ou futurs. Une grande partie des tunnels et des ponts en Europe ont plus de 50 ans et approchent de leur fin de vie avec d&rsquo;importants besoins d&rsquo;entretien, ce qui fait peser la menace de plus d&rsquo;accidents d\u00e9sastreux tels que celui du pont Morandi \u00e0 G\u00eanes en Italie en 2018 (43 morts et 16 bless\u00e9s).&nbsp;<\/p>\n\n\n\n<p>Economique et extensible, cette technologie pourrait avoir un impact r\u00e9volutionnaire sur la s\u00e9curit\u00e9 des infrastructures critiques, telles que les ponts ou les barrages.<\/p>\n\n\n\n<section class=\"wp-block-unilux-blocks-quote-people\">\n    <div class=\"quote-people\" role=\"group\">\n        <figure class=\"quote-people__body\">\n            <blockquote class=\"quote-people__blockquote\">\n    <span class=\"quote-people__quote\">\u201f<\/span>\n    <em>Les solutions et les capteurs existants ne permettent pas une d\u00e9tection et une surveillance \u00e0 un co\u00fbt raisonnable, tandis que notre technologie est bon march\u00e9 et ne n\u00e9cessite qu&rsquo;une cam\u00e9ra comme \u00e9quipement \u00e9lectronique<\/em>\u201d\n<\/blockquote>\n<div class=\"wp-block-unilux-blocks-wrapper quote-people__visual\"><figure class=\"wp-block-dev4-reusable-blocks-image  object-fit--cover\">\n    \n<img decoding=\"async\" class=\"wp-block-image unilux-custom-image-block\"\n                alt=\"Portrait of Prof. Jan Lagerwall\"\n            src=\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/9\/2025\/02\/lagerwall-scaled.jpg\"\n                    style=\"object-position: 67.00% 45.00%; font-family: &quot;object-fit: cover; object-position: 67.00% 45.00%;&quot;; aspect-ratio: 1\/1; object-fit: cover; width: 100%;\"\n        loading=\"lazy\"\n\/>    <\/figure><\/div>\n\n<div class=\"wp-block-unilux-blocks-wrapper quote-people__figcaption\">\n<p class=\"quote-people__author wp-block-unilux-blocks-plain-text\">Prof. Jan Lagerwall<\/p>\n\n\n<p class=\"quote-people__position wp-block-unilux-blocks-plain-text\">Physicien \u00e0 la Facult\u00e9 des Sciences, des Technologies et de M\u00e9decine<\/p>\n\n<div class=\"wp-block-unilux-blocks-simple-cta\">\n    <a\n        href=\"https:\/\/www.uni.lu\/fstm-en\/people\/jan-lagerwall\/\"\n        title=\"View Profile\"\n        class=\"link-text link-text--icon quote-people__link\"\n        target=\"\"\n    >\n        <span class=\"link-text__body\">\n            <span class=\"link-text__name\">Voir son profil<\/span>\n        <\/span>\n        <svg aria-hidden=\"true\" focusable=\"false\" class=\"icon icon-outline icon--arrow-right \"><use xlink:href=\"https:\/\/www.uni.lu\/wp-content\/themes\/unilux-theme\/assets\/images\/icons\/icons-outline.svg#icon--arrow-right\"><\/use><\/svg>    <\/a>\n<\/div>\n<\/div>\n        <\/figure>\n    <\/div>\n<\/section>\n\n<div class=\"wp-block-unilux-blocks-spacer is-spacer-size-sm\"><\/div>\n\n\n<h2 class=\"has-text-align-left wp-block-unilux-blocks-heading\"        id=\"des-couleurs-indiquent-ou-le-materiau-se-deteriore\"\n    >\nDes couleurs indiquent o\u00f9 le mat\u00e9riau se d\u00e9t\u00e9riore<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-dev4-reusable-blocks-image  object-fit--cover\">\n    \n<img decoding=\"async\" class=\"wp-block-image unilux-custom-image-block\"\n                alt=\"\"\n            src=\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/9\/2025\/02\/CLCE.jpeg\"\n                    style=\"object-position: 55.00% 60.00%; font-family: &quot;object-fit: cover; object-position: 55.00% 60.00%;&quot;; aspect-ratio: 4\/3; object-fit: cover; width: 100%;\"\n        loading=\"lazy\"\n\/>            <p class=\"wp-block-dev4-reusable-blocks-image-caption\">\n            Avant m\u00eame que la petite fissure centrale ne devienne visible, la couleur bleue a r\u00e9v\u00e9l\u00e9 sa pr\u00e9sence et a permis de surveiller sa propagation (voir vid\u00e9o ci-apr\u00e8s)        <\/p>\n    <\/figure><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>La collaboration interdisciplinaire de chercheurs et d&rsquo;experts en ing\u00e9nierie du b\u00e9ton, publi\u00e9e dans la revue scientifique <a href=\"https:\/\/journals.sagepub.com\/doi\/10.1177\/14759217241296831\" target=\"_blank\" rel=\"noreferrer noopener\">Structural Health Monitoring<\/a>, a d\u00e9montr\u00e9 que la formation de fissures pouvait \u00eatre r\u00e9v\u00e9l\u00e9e \u00e0 un stade tr\u00e8s pr\u00e9coce par une fine couche de ces \u00e9lastom\u00e8res \u00e0 cristaux liquides cholest\u00e9riques (Cholesteric liquid crystal elastomers &#8211; CLCE) qui changent de couleur en fonction de l&rsquo;\u00e9tat du mat\u00e9riau, et qui pourraient \u00e9galement \u00eatre utilis\u00e9s pour surveiller la croissance continue des fissures, afin d&rsquo;agir avant des cons\u00e9quences potentiellement catastrophiques.&nbsp;<\/p>\n\n\n\n<p>L&rsquo;\u00e9quipe peaufine actuellement la composition chimique des CLCE, qui peuvent prendre diff\u00e9rentes couleurs ou rester invisibles jusqu&rsquo;\u00e0 ce qu&rsquo;il y ait une fissure, afin de minimiser leur impact sur l&rsquo;environnement. Bien qu&rsquo;initialement destin\u00e9e aux surfaces en b\u00e9ton, cette technologie pourrait \u00e9galement \u00eatre facilement appliqu\u00e9e aux surfaces m\u00e9talliques de v\u00e9hicules en mouvement, tels que les avions, les bateaux, les trains et les voitures.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p>\u00ab <em>En collaboration avec Prof. Numa Bertola de l&rsquo;Universit\u00e9 du Luxembourg, nous entamons notre premi\u00e8re exp\u00e9rience pilote hors laboratoire au printemps 2025 sur une structure r\u00e9elle avec un pont en Suisse, car il est tr\u00e8s important de voir comment notre solution se comporte lorsqu&rsquo;elle est expos\u00e9e \u00e0 des conditions ext\u00e9rieures sur une longue p\u00e9riode<\/em> \u00bb, a ajout\u00e9 Prof. Jan Lagerwall.&nbsp;<\/p>\n\n\n\n<p>L&rsquo;\u00e9quipe \u00e9tudie actuellement des collaborations avec d&rsquo;autres partenaires, ainsi que des opportunit\u00e9s commerciales potentielles par le biais de licences de propri\u00e9t\u00e9 intellectuelle.&nbsp;<\/p>\n\n\n<div class=\"thumbnail  wp-block-unilux-blocks-thumbnail-video\">\n    <div class=\"card bg-theme p-0\">\n        <div class=\"card__container p-0\">\n            <div class=\"card__body p-0\">\n                <iframe \n            src=\"https:\/\/www.youtube.com\/embed\/QpnPRmMWKB8\" \n            title=\"YouTube video player\" frameborder=\"0\" \n            allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" \n            style=\"object-position: 50% 50%; aspect-ratio: 16\/9; object-fit: cover; width: 100%;\"\n            allowfullscreen data-cookieconsent=\"ignore\">\n            <\/iframe>                            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n\n\n<p>Vid\u00e9o du doctorant Yosuke Pestana Nakamura<\/p>\n\n\n\n<p>Le projet de recherche BriCE &#8211; <em>Novel Concrete Bridge Spatially-Distributed Monitoring through Chromatic Liquid Chrystal Elastomers<\/em> est financ\u00e9 par l&rsquo;IAS (<a href=\"https:\/\/www.uni.lu\/research-en\/ias\/\">Institute for Advanced Research<\/a>) de l&rsquo;Iniversit\u00e9. L&rsquo;IAS est le programme de financement de l&rsquo;Universit\u00e9 pour les projets de recherche interdisciplinaires, audacieux et innovants.<\/p>\n\n\n<section class=\"section section wp-block-unilux-blocks-quick-link-discover-section\">\n    <div class=\"container xl:max-w-screen-xl\">\n        \n<h2 class=\"has-text-align-left wp-block-unilux-blocks-heading\"        id=\"decouvrez-egalement\"\n    >\nD\u00e9couvrez \u00e9galement<\/h2>\n\n<ul class=\"wp-block-unilux-blocks-quick-link-discover quick-link-list\">\n<li class=\"wp-block-unilux-blocks-quick-link-discover-item\">\n    <a\n                    href=\"https:\/\/www.uni.lu\/research-en\/ias\/funded-projects\/audacity\/#BriCE:-Novel-Concrete-Bridge-Spatially-Distributed-Monitoring-Through-Chromatic-Liquid-Crystal-Elastomers\"\n                    class=\"quick-link\"\n            target=\"\"\n    >\n            <span class=\"quick-link__container\">\n                <span class=\"quick-link__text\">\n                    BriCE IAS project (EN)                <\/span>\n                <svg aria-hidden=\"true\" focusable=\"false\" class=\"icon icon-outline icon--arrow-right \"><use xlink:href=\"https:\/\/www.uni.lu\/wp-content\/themes\/unilux-theme\/assets\/images\/icons\/icons-outline.svg#icon--arrow-right\"><\/use><\/svg>            <\/span>\n    <\/a>\n<\/li>\n<\/ul>\n    <\/div>\n<\/section><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":341,"featured_media":13944,"template":"","format":"standard","meta":{"featured_image_focal_point":[],"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false},"news-category":[9],"news-topic":[21],"organisation":[25],"authorship":[341],"acf":[],"yoast_head":"<!-- This site is optimized with 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