{"id":1191,"date":"2013-04-22T18:10:58","date_gmt":"2013-04-22T14:10:58","guid":{"rendered":"https:\/\/portail.college-adamdevilliers.re\/wordpress\/?p=1191"},"modified":"2013-04-22T18:10:58","modified_gmt":"2013-04-22T14:10:58","slug":"fabriquer-du-ciment-lontan-cgenial","status":"publish","type":"post","link":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/fabriquer-du-ciment-lontan-cgenial\/","title":{"rendered":"Fabriquer du ciment \u00ab\u00a0lontan\u00a0\u00bb, C&rsquo;G\u00e9nial !"},"content":{"rendered":"<h4>Le ciment \u00e0 l\u2019origine du beach-rock, le ciment actuel et ancien.<\/h4>\n<p>Sur les plages de l\u2019Ile de la R\u00e9union on peut observer la pr\u00e9sence de beach-rock ou gr\u00e8s de plage.<\/p>\n<p>Ces beach-rock sont des roches coh\u00e9rentes contrairement au sable blanc corallien dont ils sont issus et qui se trouvent \u00e0 proximit\u00e9.<\/p>\n<p>Comment expliquer qu\u2019une roche meuble puisse devenir une roche coh\u00e9rente\u00a0?<\/p>\n<p>Comme r\u00e9ponse \u00e0 cette question on a r\u00e9ussi \u00e0 d\u00e9montrer par des exp\u00e9riences analogiques, des recherches sur internet, dans les ouvrages universitaires et les publications scientifiques qu\u2019il existe une \u00ab\u00a0colle\u00a0\u00bb ou ciment qui permet de lier les particules min\u00e9rales entre-elles.<\/p>\n<p>Ce ciment r\u00e9sulte de la cristallisation ou r\u00e9association des ions en solution (eau de mer, eau de chaux, etc\u2026) en pr\u00e9sence de dioxyde de carbone dans l\u2019air ou dissout dans l\u2019eau.<\/p>\n<p>Cette recherche nous a permis d\u2019expliquer le mode d\u2019action du ciment ancien,\u00a0 actuel ou ciment Portland.<\/p>\n<p style=\"text-align: right\">J-Michel Lauret, professeur de SVT et le groupe de 3\u00b0 Merle.<\/p>\n<p><a href=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1192\" title=\"cgenial2013-j01\" src=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01.jpg\" alt=\"\" width=\"612\" height=\"460\" srcset=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01.jpg 612w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01-300x225.jpg 300w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01-200x150.jpg 200w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j01-150x113.jpg 150w\" sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><\/a><!--more--><a href=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1193\" title=\"cgenial2013-j02\" src=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02.jpg\" alt=\"\" width=\"640\" height=\"480\" srcset=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02.jpg 640w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02-300x225.jpg 300w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02-200x150.jpg 200w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-j02-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><a href=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1163\" title=\"cgenial2013-01\" src=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01.jpg\" alt=\"\" width=\"640\" height=\"480\" srcset=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01.jpg 640w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01-300x225.jpg 300w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01-200x150.jpg 200w, https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-content\/uploads\/sites\/134\/2013\/04\/cgenial2013-01-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le ciment \u00e0 l\u2019origine du beach-rock, le ciment actuel et ancien. Sur les plages de l\u2019Ile de la R\u00e9union on peut observer la pr\u00e9sence de beach-rock ou gr\u00e8s de plage. Ces beach-rock sont des roches coh\u00e9rentes contrairement au sable blanc corallien dont ils sont issus et qui se trouvent \u00e0\u2026<\/p>\n<p> <a class=\"continue-reading-link\" href=\"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/fabriquer-du-ciment-lontan-cgenial\/\"><span>Lire l&rsquo;article<\/span><i class=\"crycon-right-dir\"><\/i><\/a> <\/p>\n","protected":false},"author":9172,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[9,14,17,6,7],"tags":[],"class_list":["post-1191","post","type-post","status-publish","format-standard","hentry","category-actions-pedagogiques","category-disciplines-scientifiques","category-manifestations","category-page-daccueil","category-vie-du-college"],"_links":{"self":[{"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/posts\/1191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/users\/9172"}],"replies":[{"embeddable":true,"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/comments?post=1191"}],"version-history":[{"count":0,"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/posts\/1191\/revisions"}],"wp:attachment":[{"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/media?parent=1191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/categories?post=1191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/etab.ac-reunion.fr\/clg-adam-de-villiers\/wp-json\/wp\/v2\/tags?post=1191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}