{"id":29861,"date":"2018-06-14T08:59:04","date_gmt":"2018-06-14T06:59:04","guid":{"rendered":"https:\/\/objectif-lune.ch\/?page_id=29861"},"modified":"2018-06-28T19:59:20","modified_gmt":"2018-06-28T17:59:20","slug":"test-a-la-goutte-1ere-partie","status":"publish","type":"page","link":"https:\/\/conservation-science.ch\/?page_id=29861","title":{"rendered":"Test \u00e0 la goutte, 1\u00e8re partie"},"content":{"rendered":"<h6>Test \u00e0 la goutte, 1\u00e8re partie<\/h6>\n<p style=\"text-align: justify;\"><strong>Comment d\u00e9terminer si un mat\u00e9riau est hydrophobe ou non : test \u00e0 la goutte, 1\u00e8re partie<\/strong><br \/>\navant d&rsquo;appliquer une peinture, un enduit, un cr\u00e9pi, un mortier de ragr\u00e9age il est n\u00e9cessaire de savoir si la surface a traiter a \u00e9t\u00e9 hydrofug\u00e9e ou si le mat\u00e9riau \u00e0 r\u00e9parer est hydrophobe.<br \/>\nPar d\u00e9finition un mat\u00e9riau hydrophobe n&rsquo;aime pas l&rsquo;eau : il la repousse.<br \/>\nPratiquement si vous tentez de d\u00e9poser une goutte d&rsquo;eau sur une surface hydrophobe\/hydrofug\u00e9e, la goutte \u00ab\u00a0refuse\u00a0\u00bb de s&rsquo;y accrocher : elle forme une perle sur les surfaces horizontales et roule sur les surfaces inclin\u00e9es.<br \/>\nPour d\u00e9terminer si une surface est hydrophobe il suffit donc de faire le test \u00e0 la goutte d\u00e9crit ci-dessous.<\/p>\n<p style=\"text-align: justify;\"><strong>1 &#8211; Pour d\u00e9poser la goutte<\/strong><br \/>\namenez d\u00e9licatement en contact une petite goutte d&rsquo;eau avec la surface du mat\u00e9riau \u00e0 tester<\/p>\n<table border=\"0\" width=\"580\" align=\"center\">\n<tbody>\n<tr>\n<td style=\"vertical-align: top;\" align=\"center\" width=\"\" height=\"\"><img decoding=\"async\" class=\"rex_image\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/surface_horiz.jpg\" alt=\"[Keine Beschreibung eingegeben]\" ismap=\"ismap\" \/><br \/>\nsurface horizontale<\/td>\n<td style=\"vertical-align: top;\" align=\"center\" valign=\"bottom\" width=\"\" height=\"\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-29842\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/surface_vertic.jpg\" alt=\"\" width=\"268\" height=\"198\" \/><br \/>\nsurface verticale<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\"><strong>2 &#8211; Si le mat\u00e9riau est hydrophobe<\/strong><br \/>\nla goutte d&rsquo;eau forme une perle plus ou moins aplatie (elle roule sur les surfaces fortement inclin\u00e9es ou verticales)<\/p>\n<table border=\"0\" width=\"580\" align=\"center\">\n<tbody>\n<tr>\n<td style=\"vertical-align: top;\" align=\"center\" valign=\"bottom\" width=\"\" height=\"\"><img decoding=\"async\" class=\"rex_image\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/hydrophob_fort.jpg\" alt=\"[Keine Beschreibung eingegeben]\" ismap=\"ismap\" \/><br \/>\nsurface tr\u00e8s hydrophobe<\/td>\n<td style=\"vertical-align: top;\" align=\"center\" valign=\"bottom\" width=\"\" height=\"\"><img decoding=\"async\" class=\"rex_image\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/hydrophob_faible.jpg\" alt=\"[Keine Beschreibung eingegeben]\" ismap=\"ismap\" \/><br \/>\nsurface l\u00e9g\u00e8rement moins hydrophobe<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\"><strong>3 &#8211; Si le mat\u00e9riau n&rsquo;est pas hydrophobe<\/strong><br \/>\n&#8211; la goutte d&rsquo;eau mouille la surface tout en \u00e9tant plus moins rapidement absorb\u00e9e par le mat\u00e9riau s&rsquo;il est poreux (a) ;<br \/>\n&#8211; si le mat\u00e9riau n&rsquo;est pas poreux, la goutte d&rsquo;eau mouille la surface et s&rsquo;y \u00e9tale simplement, sans \u00eatre absorb\u00e9e (b). Elle dispara\u00eet lentement par \u00e9vaporation.<\/p>\n<table border=\"0\" width=\"580\" align=\"center\">\n<tbody>\n<tr>\n<td align=\"center\" valign=\"bottom\" width=\"\" height=\"\"><img decoding=\"async\" class=\"rex_image\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/nonhydrophporx.jpg\" alt=\"[Keine Beschreibung eingegeben]\" ismap=\"ismap\" \/><br \/>\n(a) mat\u00e9riau non hydrophobe,<br \/>\nporeux et capillaire<\/td>\n<td style=\"vertical-align: top;\" align=\"center\" valign=\"bottom\" width=\"\" height=\"\"><img decoding=\"async\" class=\"rex_image\" src=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/nonhydrophnonporx.jpg\" alt=\"[Keine Beschreibung eingegeben]\" ismap=\"ismap\" \/><br \/>\n(b) mat\u00e9riau non hydrophobe<br \/>\net non poreux<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\"><em><strong><span style=\"color: #996600;\">Test \u00e0 la goutte, suite :<\/span> <\/strong>avec notre prochaine astuce nous expliquerons comment v\u00e9rifier si un traitement de surface forme un film \u00e9tanche non poreux ou s&rsquo;il rend \u00ab\u00a0<\/em><em>seulement\u00a0\u00bb <\/em><em>les surfaces <\/em><em>hydrophobes sans boucher les pores <\/em><em>&#8230;<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Test \u00e0 la goutte, 1\u00e8re partie Comment d\u00e9terminer si un mat\u00e9riau est hydrophobe ou non : test \u00e0 la goutte, 1\u00e8re partie avant d&rsquo;appliquer une peinture, un enduit, un cr\u00e9pi, un mortier de ragr\u00e9age il est n\u00e9cessaire de savoir si la surface a traiter a \u00e9t\u00e9 hydrofug\u00e9e ou si le mat\u00e9riau \u00e0 r\u00e9parer est hydrophobe. &hellip; <a href=\"https:\/\/conservation-science.ch\/?page_id=29861\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Test \u00e0 la goutte, 1\u00e8re partie<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":29891,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29861","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Test \u00e0 la goutte, 1\u00e8re partie - Bl\u00e4uer - Conservation - Science<\/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:\/\/conservation-science.ch\/?page_id=29861\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Test \u00e0 la goutte, 1\u00e8re partie - Bl\u00e4uer - Conservation - Science\" \/>\n<meta property=\"og:description\" content=\"Test \u00e0 la goutte, 1\u00e8re partie Comment d\u00e9terminer si un mat\u00e9riau est hydrophobe ou non : test \u00e0 la goutte, 1\u00e8re partie avant d&rsquo;appliquer une peinture, un enduit, un cr\u00e9pi, un mortier de ragr\u00e9age il est n\u00e9cessaire de savoir si la surface a traiter a \u00e9t\u00e9 hydrofug\u00e9e ou si le mat\u00e9riau \u00e0 r\u00e9parer est hydrophobe. &hellip; 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