{"id":83278,"date":"2024-03-26T12:42:24","date_gmt":"2024-03-26T11:42:24","guid":{"rendered":"https:\/\/www.immo-invest.ch\/macht-dieser-umweltfreundliche-verbundwerkstoff-stahlbeton-ueberfluessig\/"},"modified":"2024-03-26T14:14:08","modified_gmt":"2024-03-26T13:14:08","slug":"macht-dieser-umweltfreundliche-verbundwerkstoff-stahlbeton-ueberfluessig","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/macht-dieser-umweltfreundliche-verbundwerkstoff-stahlbeton-ueberfluessig\/","title":{"rendered":"Ce mat\u00e9riau composite \u00e9cologique rend-il le b\u00e9ton arm\u00e9 superflu ?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">La production de ciment est consid\u00e9r\u00e9e comme particuli\u00e8rement nocive pour le climat, c&rsquo;est pourquoi l&rsquo;industrie de la construction cherche des alternatives pour r\u00e9duire les \u00e9missions de CO2. Des chercheurs de l&rsquo;Institut allemand de recherche sur les textiles et les fibres (DITF) \u00e0 Denkendorf ont d\u00e9velopp\u00e9 une telle alternative. Le nouveau mat\u00e9riau composite compos\u00e9 de pierre naturelle, de fibres de carbone et de biochar pourrait constituer une alternative \u00e9cologique au b\u00e9ton arm\u00e9 et se distingue par son excellent bilan CO2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Projet collaboratif DACCUSS-Pre<br><\/strong>L&rsquo;utilisation de mat\u00e9riaux v\u00e9g\u00e9taux tels que le bois, la paille ou d&rsquo;autres fibres v\u00e9g\u00e9tales comme mat\u00e9riaux de construction permet de fixer efficacement le carbone. Mais pour l&rsquo;\u00e9quipe du projet DACCUSS-Pre, le stockage \u00e0 court terme ne suffit pas. Ils travaillent sur un nouveau mat\u00e9riau de construction appel\u00e9 CFS (CarbonFaserStein), compos\u00e9 de fibres de carbone v\u00e9g\u00e9tales, de biochar et de roche dure. Ce mat\u00e9riau de construction doit non seulement r\u00e9pondre \u00e0 toutes les exigences techniques, mais aussi, \u00e0 long terme, \u00e9liminer de l&rsquo;atmosph\u00e8re plus de dioxyde de carbone qu&rsquo;il n&rsquo;en lib\u00e8re lors de sa fabrication.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CFS r\u00e9alise cette s\u00e9questration du carbone de trois mani\u00e8res diff\u00e9rentes<br><\/strong>La transformation de la biomasse riche en carbone, comme les algues, en fibres de carbone permet de stocker le carbone \u00e0 long terme dans le mat\u00e9riau de construction. La roche dure du CFS contribue en outre \u00e0 la fixation du CO\u2082. Pendant le processus de fabrication, de la poussi\u00e8re de pierre est produite, ce qui acc\u00e9l\u00e8re l&rsquo;alt\u00e9ration de la roche et permet ainsi de fixer le dioxyde de carbone de l&rsquo;air par des r\u00e9actions chimiques dans la pierre. Le biochar, un autre mat\u00e9riau durable et riche en carbone obtenu \u00e0 partir de parties de plantes, est utilis\u00e9 comme couche d&rsquo;isolation entre les dalles de pierre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fa\u00e7ade de b\u00e2timent mise en \u0153uvre<br><\/strong>En \u00e9troite collaboration avec la soci\u00e9t\u00e9 TechnoCarbon Technologies, le projet a d\u00e9j\u00e0 fait des progr\u00e8s consid\u00e9rables &#8211; un premier prototype sous la forme d&rsquo;un \u00e9l\u00e9ment de construction pour les murs d&rsquo;une maison a \u00e9t\u00e9 mis en \u0153uvre avec succ\u00e8s. Celui-ci se compose des \u00e9l\u00e9ments mentionn\u00e9s pr\u00e9c\u00e9demment, \u00e0 savoir des fibres de carbone, de la roche dure et du biochar. Deux plaques de pierre naturelle servent de parois ext\u00e9rieures \u00e0 l&rsquo;\u00e9l\u00e9ment de construction. Les fibres de carbone renforcent les parois lat\u00e9rales \u00e0 l&rsquo;aide de tissus techniques et reprennent la charge de traction, comme l&rsquo;acier d&rsquo;armature dans le b\u00e9ton arm\u00e9. Le biocarbone sert quant \u00e0 lui de mat\u00e9riau de remplissage et agit comme un isolant efficace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fibres de carbone BIO \u00e0 partir de mati\u00e8res premi\u00e8res<br><\/strong>Les fibres de carbone d\u00e9velopp\u00e9es au DITF de Denkendorf sont compos\u00e9es de lignine extraite de la biomasse. Ces fibres se distinguent par leur rentabilit\u00e9 due au faible co\u00fbt des mati\u00e8res premi\u00e8res et par leur efficacit\u00e9 \u00e0 fixer le carbone. Compar\u00e9es aux fers \u00e0 b\u00e9ton traditionnels, elles ne rouillent pas, ce qui prolonge leur dur\u00e9e de vie. Bien que leur fabrication n\u00e9cessite plus d&rsquo;\u00e9nergie que celle de l&rsquo;acier, la quantit\u00e9 utilis\u00e9e dans la construction est si faible que le bilan global de l&rsquo;\u00e9nergie et des \u00e9missions de CO2 est plus positif que celui du b\u00e9ton arm\u00e9. L&rsquo;utilisation de l&rsquo;\u00e9nergie solaire et de la biomasse lors de la fabrication, ainsi que l&rsquo;alt\u00e9ration naturelle de la poudre de pierre, font que le bilan carbone de ce nouveau mat\u00e9riau de construction est m\u00eame n\u00e9gatif. Il est donc possible de construire des b\u00e2timents qui contribuent activement \u00e0 la r\u00e9duction des \u00e9missions de CO2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Impact environnemental de la fa\u00e7ade d&rsquo;une maison<br><\/strong>Les chercheurs de Denkendorf font part de leur enthousiasme pour le nouveau d\u00e9monstrateur d&rsquo;un \u00e9l\u00e9ment de mur dans la construction de b\u00e2timents. Celui-ci est constitu\u00e9 de gabbro, une pierre naturelle originaire d&rsquo;Inde, qui est non seulement agr\u00e9able \u00e0 l&rsquo;\u0153il, mais qui pr\u00e9sente \u00e9galement une grande r\u00e9sistance aux charges, comme le confirment les tests de charge. La couche sup\u00e9rieure des panneaux de pierre est fabriqu\u00e9e \u00e0 partir de fibres de carbone biosourc\u00e9es, le biochar provenant de la soci\u00e9t\u00e9 renomm\u00e9e Convoris GmbH, connue pour ses excellentes valeurs d&rsquo;isolation thermique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le secteur de la construction cherche d\u00e9sesp\u00e9r\u00e9ment des moyens de rendre ses activit\u00e9s plus respectueuses de l&rsquo;environnement. Un mat\u00e9riau composite innovant pourrait offrir une solution \u00e0 cet \u00e9gard. Il permet de construire sans impact sur le climat et constitue une alternative au b\u00e9ton arm\u00e9. <\/p>\n","protected":false},"author":2,"featured_media":83272,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"0","_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[22357],"tags":[39887,45656,3049,43600,45657],"class_list":["post-83278","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industrie-du-batiment","tag-alternativen-fr","tag-gebaeudefassade-fr","tag-rohstoffe-fr","tag-stahlbeton-fr","tag-verbundwerkstoff-fr","pmpro-has-access"],"acf":{"bild_mit_ki_erstellt_worden":[],"lead":"Le secteur de la construction cherche d\u00e9sesp\u00e9r\u00e9ment des moyens de rendre ses activit\u00e9s plus respectueuses de l'environnement. Un mat\u00e9riau composite innovant pourrait offrir une solution \u00e0 cet \u00e9gard. Il permet de construire sans impact sur le climat et constitue une alternative au b\u00e9ton arm\u00e9. ","autor":"Quelle: Ingenieur","ort":"","bildunterschrift":"","zusammenfassung":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Le secteur de la construction cherche d\u00e9sesp\u00e9r\u00e9ment des moyens de rendre ses activit\u00e9s plus respectueuses de l&#039;environnement. Un mat\u00e9riau composite innovant pourrait offrir une solution \u00e0 cet \u00e9gard. 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