{"id":72360,"date":"2024-01-12T15:28:26","date_gmt":"2024-01-12T14:28:26","guid":{"rendered":"https:\/\/www.immo-invest.ch\/?p=72360"},"modified":"2024-01-12T13:32:16","modified_gmt":"2024-01-12T12:32:16","slug":"neuer-beton-soll-co2-emissionen-senken","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/neuer-beton-soll-co2-emissionen-senken\/","title":{"rendered":"Un nouveau b\u00e9ton pour r\u00e9duire les \u00e9missions de CO2"},"content":{"rendered":"<p class=\"bodytext\">Des chercheurs du <a href=\"https:\/\/www.empa.ch\/web\/s308\" target=\"_blank\" rel=\"noopener\">laboratoire Concrete &amp; Asphalt<\/a> du Laboratoire f\u00e9d\u00e9ral d&rsquo;essai des mat\u00e9riaux et de recherche<a href=\"https:\/\/www.empa.ch\/\" target=\"_blank\" rel=\"noopener\">(Empa<\/a>) d\u00e9veloppent un b\u00e9ton capable de fixer le carbone. Selon un <a href=\"https:\/\/www.admin.ch\/gov\/de\/start\/dokumentation\/medienmitteilungen.msg-id-99611.html\" target=\"_blank\" rel=\"noopener\">communiqu\u00e9 de presse<\/a>, l&rsquo;institut veut contribuer par cette recherche \u00e0 la r\u00e9duction des \u00e9missions de CO2 pour une Suisse climatiquement neutre d&rsquo;ici 2050. Dans le cadre de ce projet, les chercheurs dirig\u00e9s par le professeur Pietro Lura tiennent compte du fait que 8 pour cent des \u00e9missions de gaz \u00e0 effet de serre dans le monde proviennent de la production de ciment. Pour y rem\u00e9dier, l&rsquo;\u00e9quipe de recherche de l&rsquo;Empa veut utiliser du charbon v\u00e9g\u00e9tal dans la fabrication du b\u00e9ton. Le carbone pr\u00e9sent dans les plantes provient de l&rsquo;absorption du dioxyde de carbone de l&rsquo;air. La carbonisation ne lib\u00e8re pas de nouveau CO2. Cependant, le charbon v\u00e9g\u00e9tal ne peut pas \u00eatre ajout\u00e9 directement au b\u00e9ton.<\/p>\n<p class=\"bodytext\">\u00ab\u00a0Le charbon v\u00e9g\u00e9tal est tr\u00e8s poreux et absorbe donc non seulement beaucoup d&rsquo;eau, mais aussi des adjuvants co\u00fbteux utilis\u00e9s dans la fabrication du b\u00e9ton\u00a0\u00bb, explique Mateusz Wyrzykowski, chercheur \u00e0 l&rsquo;Empa, cit\u00e9 dans le communiqu\u00e9. La solution propos\u00e9e par l&rsquo;\u00e9quipe de l&rsquo;Empa r\u00e9side dans la granulation des composants du charbon. Dans un m\u00e9langeur rotatif, le charbon est m\u00e9lang\u00e9 \u00e0 de l&rsquo;eau et du ciment. On obtient ainsi des pellets d&rsquo;un diam\u00e8tre compris entre 4 et 32 millim\u00e8tres. Ces granul\u00e9s peuvent \u00eatre utilis\u00e9s pour fabriquer du b\u00e9ton normal de classe de r\u00e9sistance C20\/25 \u00e0 C30\/37, les classes les plus r\u00e9pandues aujourd&rsquo;hui dans le secteur du b\u00e2timent et du g\u00e9nie civil.<\/p>\n<p class=\"bodytext\">\u00ab\u00a0Avec 20 pour cent en volume de granul\u00e9s de carbone dans le b\u00e9ton, nous obtenons des \u00e9missions nettes nulles\u00a0\u00bb, explique Mateusz Wyrzykowski. \u00ab\u00a0Cela signifie que la quantit\u00e9 de carbone stock\u00e9e compense toutes les \u00e9missions g\u00e9n\u00e9r\u00e9es par la production des granul\u00e9s comme par celle du b\u00e9ton\u00a0\u00bb.<\/p>\n<p class=\"bodytext\">Le projet fait partie du vaste concept Mining the Atmosphere, poursuivi par plusieurs d\u00e9partements de recherche de l&rsquo;Empa, dont la production de gaz m\u00e9thane synth\u00e9tique \u00e0 l&rsquo;aide d&rsquo;\u00e9nergie solaire, d&rsquo;eau et de CO2 de l&rsquo;atmosph\u00e8re dans les r\u00e9gions ensoleill\u00e9es du globe, suivie de la pyrolyse du gaz. \u00ab\u00a0On obtient ainsi de l&rsquo;hydrog\u00e8ne, que l&rsquo;on peut utiliser comme source d&rsquo;\u00e9nergie dans l&rsquo;industrie ou la mobilit\u00e9, et du carbone solide que nous pouvons transformer en pellets &#8211; comme le charbon v\u00e9g\u00e9tal &#8211; et incorporer dans le b\u00e9ton\u00a0\u00bb, explique le directeur de recherche Lura.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Die Eidgen\u00f6ssische Materialpr\u00fcfungs- und Forschungsanstalt (Empa) will in der Bauindustrie verwendeten Beton mit Pflanzenkohle anreichern. Mit dieser Technologie soll die CO2-Bilanz der Schweiz verbessert werden.<\/p>\n","protected":false},"author":2,"featured_media":72355,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_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":[743],"tags":[2209,3931,2002],"class_list":["post-72360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-immonews-fr","tag-bauwesen-fr","tag-immonews-fr","tag-news-fr"],"acf":{"bild_mit_ki_erstellt_worden":[],"lead":"D\u00fcbendorf ZH - Die Eidgen\u00f6ssische Materialpr\u00fcfungs- und Forschungsanstalt (Empa) will in der Bauindustrie verwendeten Beton mit Pflanzenkohle anreichern. Mit dieser Technologie soll die CO2-Bilanz der Schweiz verbessert werden.","autor":"ce\/ww","ort":"D\u00fcbendorf ZH","bildunterschrift":"","zusammenfassung":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Die Eidgen\u00f6ssische Materialpr\u00fcfungs- und Forschungsanstalt (Empa) will in der Bauindustrie verwendeten Beton mit Pflanzenkohle anreichern. 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