{"id":90816,"date":"2015-12-17T06:11:40","date_gmt":"2015-12-17T05:11:40","guid":{"rendered":"http:\/\/batijournal.com\/?p=90816"},"modified":"2019-07-15T12:43:43","modified_gmt":"2019-07-15T10:43:43","slug":"90816-2","status":"publish","type":"post","link":"https:\/\/batijournal.com\/index.php\/90816-2\/90816\/","title":{"rendered":"B\u00e9ton \u00e0 prise d\u00e9clench\u00e9e pour des logements collectifs"},"content":{"rendered":"<p><strong>Pour les voiles ext\u00e9rieurs et les balcons de son R+6, le promoteur European Homes cherchait une solution permettant de r\u00e9pondre aux exigences sismiques et thermiques de la r\u00e9gion. En r\u00e9ponse \u00e0 cette probl\u00e9matique et malgr\u00e9 un \u00e9loignement de 150 km de ses centrales lyonnaises, Lafarge France a tout sp\u00e9cialement d\u00e9velopp\u00e9 un b\u00e9ton isolant structurel Thermedia 0.6 Trigger. Ainsi, 600 m3 de ce b\u00e9ton pr\u00eat \u00e0 l\u2019emploi ont \u00e9t\u00e9 transport\u00e9 une fois \u00ab endormi \u00bb puis r\u00e9veill\u00e9 sur chantier. Une premi\u00e8re mondiale pour la technologie Trigger.<\/strong><\/p>\n<p>Apr\u00e8s quatre ann\u00e9es de recherches, le Centre de Recherche de Lafarge (LCR) \u00e0 Saint Quentin Fallavier (38) a mis au point Trigger, une technologie reposant sur une double adjuvantation organique.<br \/>\nEtape 1 : arr\u00eat de l\u2019hydratation des grains de ciment.<br \/>\nEtape 2 : d\u00e9blocage de la r\u00e9action permettant ainsi au b\u00e9ton de retrouver sa prise habituelle.<br \/>\nCette derni\u00e8re est ainsi d\u00e9clenchable sur demande. Un b\u00e9ton conventionnel d\u00e9bute g\u00e9n\u00e9ralement sa prise au bout de 2 heures apr\u00e8s introduction de l\u2019eau dans la premi\u00e8re g\u00e2ch\u00e9e. En ce laps de temps, il faut donc le fabriquer, le charger dans un camion-malaxeur, le transporter et le mettre en \u0153uvre dans un coffrage. Les technologies actuelles permettaient de retarder la prise de quelques heures mais les performances du produit s\u2019en trouvaient g\u00e9n\u00e9ralement diminu\u00e9es. D\u00e9sormais, le Trigger offre un blocage r\u00e9versible allant jusqu\u2019\u00e0 48h. Cette innovation permet pour la premi\u00e8re fois de stocker du b\u00e9ton frais.<\/p>\n<p>Mis en \u0153uvre sur plusieurs familles de b\u00e9tons, Trigger est dor\u00e9navant utilis\u00e9 r\u00e9guli\u00e8rement par l\u2019Agence Rh\u00f4ne Alpes Auvergne de Lafarge B\u00e9tons France pour des livraisons diff\u00e9r\u00e9es par rapport aux p\u00e9riodes de production (livraisons de nuit ou de week-end), ou bien pour transporter sur des distances longues des produits sp\u00e9ciaux non disponibles localement. Il est fabriqu\u00e9 et charg\u00e9 dans les camions malaxeurs pendant les p\u00e9riodes creuses de la journ\u00e9e puis livr\u00e9 \u00e0 l\u2019horaire demand\u00e9 sur le chantier, ind\u00e9pendamment de son heure de fabrication.<\/p>\n<p>Pour la r\u00e9alisation des logements du \u00ab 74 Gen\u00e8ve \u00bb, un Thermedia 0.6 a \u00e9t\u00e9 sp\u00e9cialement con\u00e7u en version Trigger. Pour la formulation de ce b\u00e9ton, les \u00e9quipes du LCR ont \u00e9t\u00e9 mobilis\u00e9es adapt\u00e9 la technologie trigger \u00e0 un b\u00e9ton qui doit conserver des propri\u00e9t\u00e9s isolantes thermiques. Compte tenu des conditions climatiques difficiles pouvant aller de 0\u00b0C en mars \u00e0 pr\u00e8s de 40\u00b0C en juillet, les chercheurs ont d\u00fb \u00e9tablir une formulation adapt\u00e9e aux variations de temp\u00e9rature de la r\u00e9gion. La distance de transport et le taux de chargement des camions ont n\u00e9cessit\u00e9 de conserver une rotation permanente des toupies pour \u00e9viter la d\u00e9formation de la boule, suffisamment lente pour ne pas r\u00e9veiller la prise du produit. L\u2019entreprise GSB a su s\u2019adapter \u00e0 cette logistique complexe de par son \u00e9loignement distance en fournissant des estimations pr\u00e9cises \u00e0 l\u2019agence Lafarge Rh\u00f4ne Alpes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pour les voiles ext\u00e9rieurs et les balcons de son R+6, le promoteur European Homes cherchait une solution permettant de r\u00e9pondre aux exigences sismiques et thermiques de la r\u00e9gion. En r\u00e9ponse \u00e0 cette probl\u00e9matique et malgr\u00e9 un \u00e9loignement de 150 km de ses centrales lyonnaises, Lafarge France a tout sp\u00e9cialement d\u00e9velopp\u00e9 un b\u00e9ton isolant structurel Thermedia [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":90817,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[6340,6356,10774],"tags":[1128],"class_list":["post-90816","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-architecture-conception","category-produits-solutions-techniques","category-produits-5facades","tag-beton"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>B\u00e9ton \u00e0 prise d\u00e9clench\u00e9e pour des logements collectifs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/batijournal.com\/index.php\/90816-2\/90816\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"B\u00e9ton \u00e0 prise d\u00e9clench\u00e9e pour des logements collectifs\" \/>\n<meta property=\"og:description\" content=\"Pour les voiles ext\u00e9rieurs et les balcons de son R+6, le promoteur European Homes cherchait une solution permettant de r\u00e9pondre aux exigences sismiques et thermiques de la r\u00e9gion. 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