{"id":101639,"date":"2024-06-18T14:03:17","date_gmt":"2024-06-18T12:03:17","guid":{"rendered":"https:\/\/www.immo-invest.ch\/zementrevolution-dank-perlmutt-struktur\/"},"modified":"2024-06-18T16:54:06","modified_gmt":"2024-06-18T14:54:06","slug":"zementrevolution-dank-perlmutt-struktur","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/zementrevolution-dank-perlmutt-struktur\/","title":{"rendered":"La r\u00e9volution du ciment gr\u00e2ce \u00e0 la structure nacr\u00e9e"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Contrairement au verre, au bois et \u00e0 l&rsquo;acier, le ciment est par nature fragile et peu flexible s&rsquo;il n&rsquo;est pas renforc\u00e9. Cela limite consid\u00e9rablement ses possibilit\u00e9s d&rsquo;utilisation dans les structures porteuses. Bien qu&rsquo;il existe d\u00e9j\u00e0 des m\u00e9thodes pour am\u00e9liorer la t\u00e9nacit\u00e9 \u00e0 la rupture et la ductilit\u00e9 du ciment, par exemple en ajoutant des renforts en polym\u00e8re, en verre ou en m\u00e9tal, celles-ci n&rsquo;augmentent que tr\u00e8s peu l&rsquo;absorption d&rsquo;\u00e9nergie et la r\u00e9sistance \u00e0 la rupture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Un mat\u00e9riau composite inspir\u00e9 de la nacre<br><\/strong>L&rsquo;\u00e9quipe de l&rsquo;universit\u00e9 de Princeton a d\u00e9couvert que l&rsquo;alternance de couches de polym\u00e8re fin et de p\u00e2te de ciment \u00e0 motifs augmentait la ductilit\u00e9. Le composite mis au point imite la structure de la nacre, une substance que l&rsquo;on trouve dans certains coquillages et qui est connue pour sa solidit\u00e9 et sa flexibilit\u00e9. La nacre est compos\u00e9e \u00e0 plus de 95 % de carbonate de calcium et jusqu&rsquo;\u00e0 5 % de mati\u00e8re organique. Cette combinaison unique conf\u00e8re \u00e0 la nacre sa remarquable r\u00e9sistance m\u00e9canique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u00e9canismes de la structure de la nacre<br><\/strong>La nacre est un biomin\u00e9ral compos\u00e9 de plaquettes d&rsquo;aragonite reli\u00e9es par un biopolym\u00e8re souple. Cette structure de mortier de brique 3D permet aux plaquettes de glisser et de se d\u00e9former, ce qui absorbe l&rsquo;\u00e9nergie et augmente la t\u00e9nacit\u00e9. Cette synergie entre les composants durs et souples est essentielle pour obtenir les propri\u00e9t\u00e9s m\u00e9caniques remarquables de la nacre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application des principes aux composites cimentaires<br><\/strong>Les chercheurs de l&rsquo;universit\u00e9 de Princeton ont utilis\u00e9 des mat\u00e9riaux de construction traditionnels comme le ciment Portland et des polym\u00e8res pour d\u00e9velopper un composite similaire. Ils ont superpos\u00e9 des plaques de ciment-colle avec du polyvinylsiloxane, un polym\u00e8re flexible, pour cr\u00e9er des poutres multicouches. Celles-ci ont \u00e9t\u00e9 soumises \u00e0 un test de flexion entaill\u00e9 en trois points pour v\u00e9rifier leur r\u00e9sistance \u00e0 la fissuration. Les r\u00e9sultats ont montr\u00e9 que ces mat\u00e9riaux composites ont atteint une t\u00e9nacit\u00e9 \u00e0 la rupture 17 fois sup\u00e9rieure et une ductilit\u00e9 1791 pour cent sup\u00e9rieure \u00e0 celle du ciment solide.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Perspectives d&rsquo;avenir et optimisation<br><\/strong>Les chercheurs pr\u00e9voient d&rsquo;explorer diff\u00e9rents mat\u00e9riaux souples pour des infrastructures plus r\u00e9sistantes et d&rsquo;optimiser les formes des rainures pour une meilleure int\u00e9gration des d\u00e9fauts. Ils pr\u00e9voient \u00e9galement de d\u00e9velopper des m\u00e9thodes de production par des proc\u00e9d\u00e9s int\u00e9gr\u00e9s de stratification au laser ou de fabrication additive. Ces avanc\u00e9es pourraient r\u00e9volutionner l&rsquo;industrie de la construction et \u00e9largir consid\u00e9rablement l&rsquo;utilisation du ciment dans les structures porteuses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le composite cimentaire r\u00e9cemment d\u00e9velopp\u00e9, inspir\u00e9 de la structure de la nacre, offre une solution prometteuse pour am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques du ciment. Avec une r\u00e9sistance \u00e0 la fissuration et une ductilit\u00e9 exceptionnelles, ce composite repr\u00e9sente une innovation majeure qui a le potentiel de transformer durablement l&rsquo;industrie de la construction.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs de l&rsquo;universit\u00e9 de Princeton ont mis au point un composite cimentaire r\u00e9volutionnaire qui s\u00e9duit par sa r\u00e9sistance exceptionnelle \u00e0 la fissuration et sa ductilit\u00e9. Inspir\u00e9 de la nacre naturelle, ce mat\u00e9riau composite pourrait changer radicalement l&rsquo;industrie de la construction. <\/p>\n","protected":false},"author":2,"featured_media":101056,"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":[22699,22696,22357],"tags":[47577,2600,848,872,3931,47578,37650,47579,38142,46763,7300],"class_list":["post-101639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-durabilite","category-entreprise","category-industrie-du-batiment","tag-einsatzmoeglichkeit-fr","tag-forschung-fr","tag-immobilien-fr","tag-immoinvest-fr","tag-immonews-fr","tag-mechanismus-fr","tag-optimierung-fr","tag-perlmutt-fr","tag-verstaerkung-fr","tag-werkstoff-fr","tag-zement-fr","pmpro-has-access"],"acf":{"bild_mit_ki_erstellt_worden":[],"lead":"Des chercheurs de l'universit\u00e9 de Princeton ont mis au point un composite cimentaire r\u00e9volutionnaire qui s\u00e9duit par sa r\u00e9sistance exceptionnelle \u00e0 la fissuration et sa ductilit\u00e9. Inspir\u00e9 de la nacre naturelle, ce mat\u00e9riau composite pourrait changer radicalement l'industrie de la construction. ","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=\"Des chercheurs de l&#039;universit\u00e9 de Princeton ont mis au point un composite cimentaire r\u00e9volutionnaire qui s\u00e9duit par sa r\u00e9sistance exceptionnelle \u00e0 la fissuration et sa ductilit\u00e9. 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