{"id":29853,"date":"2018-06-14T08:49:06","date_gmt":"2018-06-14T06:49:06","guid":{"rendered":"https:\/\/objectif-lune.ch\/?page_id=29853"},"modified":"2018-06-28T19:46:16","modified_gmt":"2018-06-28T17:46:16","slug":"identification-rapide-de-la-source-defflorescences-de-sels-a-laide-dun-papier-ph-1-14","status":"publish","type":"page","link":"https:\/\/conservation-science.ch\/?page_id=29853","title":{"rendered":"Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14"},"content":{"rendered":"
Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14<\/h6>\n

Sur les b\u00e2timents, la source d’efflorescences de sels alcalins (pH > 8) est toujours un mat\u00e9riau de construction (ou de restauration\/conservation) lui-m\u00eame alcalin, tel que le ciment, la chaux hydraulique ou le verre soluble (Schaffer, 1932 ; Arnold, 1985).
\nPar cons\u00e9quent, si la mesure faite sur des efflorescences in situ ou au laboratoire avec un papier pH donne un r\u00e9sultat alcalin (pH > 8), la recherche de l’origine de ces sels est tr\u00e8s rapidement orient\u00e9e. Par contre, si le pH est neutre ou acide (\u00a0\u2264 8), la source des sels solubles ne peut \u00eatre identifi\u00e9e qu’apr\u00e8s des analyses plus pouss\u00e9es et il peut m\u00eame s’agir des mat\u00e9riaux alcalins cit\u00e9s pr\u00e9c\u00e9demment.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \"\"\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \"\"<\/p>\n\n\n\n
Mesure in situ :\u00a0<\/strong><\/span>
\n– humidifier le papier pH\u00a0<\/span>
\n– le poser ou le frotter sur les efflorescences<\/span>
\n– lire la mesure<\/span><\/td>\n		Mesure au laboratoire :<\/strong><\/span>
\n– dissoudre les sels dans une goutte d’eau<\/span>
\n– tremper le papier pH dans la goutte<\/span>
\n– lire la mesure<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Arnold, A. (1985). \u00ab\u00a0Moderne alkalische Baustoffe und die Probleme bei der Konservierung von Denkm\u00e4lern.\u00a0\u00bb Natursteinkonservierung, Arbeitshefte des Bayerischen Landesamtes f\u00fcr Denkmalpflege, 31, 152-162.\u00a0\u00a0<\/span><\/p>\n

Schaffer, R. J. (1932). \u00ab\u00a0The Weathering of Natural Building Stones.\u00a0\u00bb Facsimile of the 1932 edition , published by Construction Research communications Ltd, by permission of Building Research Establishment Ltd.<\/span><\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14 Sur les b\u00e2timents, la source d’efflorescences de sels alcalins (pH > 8) est toujours un mat\u00e9riau de construction (ou de restauration\/conservation) lui-m\u00eame alcalin, tel que le ciment, la chaux hydraulique ou le verre soluble (Schaffer, 1932 ; Arnold, 1985). Par cons\u00e9quent, … Continuer la lecture de Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":29891,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29853","page","type-page","status-publish","hentry"],"yoast_head":"\nIdentification rapide de la source d'efflorescences de sels \u00e0 l'aide d'un papier pH 1-14 - 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=29853\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Identification rapide de la source d'efflorescences de sels \u00e0 l'aide d'un papier pH 1-14 - Bl\u00e4uer - Conservation - Science\" \/>\n<meta property=\"og:description\" content=\"Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14 Sur les b\u00e2timents, la source d’efflorescences de sels alcalins (pH > 8) est toujours un mat\u00e9riau de construction (ou de restauration\/conservation) lui-m\u00eame alcalin, tel que le ciment, la chaux hydraulique ou le verre soluble (Schaffer, 1932 ; Arnold, 1985). Par cons\u00e9quent, … Continuer la lecture de Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14\" \/>\n<meta property=\"og:url\" content=\"https:\/\/conservation-science.ch\/?page_id=29853\" \/>\n<meta property=\"og:site_name\" content=\"Bl\u00e4uer - Conservation - Science\" \/>\n<meta property=\"article:modified_time\" content=\"2018-06-28T17:46:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/papierphinsitu_ptt.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853\",\"url\":\"https:\/\/conservation-science.ch\/?page_id=29853\",\"name\":\"Identification rapide de la source d'efflorescences de sels \u00e0 l'aide d'un papier pH 1-14 - Bl\u00e4uer - Conservation - Science\",\"isPartOf\":{\"@id\":\"https:\/\/conservation-science.ch\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853#primaryimage\"},\"image\":{\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853#primaryimage\"},\"thumbnailUrl\":\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/papierphinsitu_ptt.jpg\",\"datePublished\":\"2018-06-14T06:49:06+00:00\",\"dateModified\":\"2018-06-28T17:46:16+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/conservation-science.ch\/?page_id=29853\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853#primaryimage\",\"url\":\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/papierphinsitu_ptt.jpg\",\"contentUrl\":\"https:\/\/csc-sarl.ch\/wp-content\/uploads\/2018\/06\/papierphinsitu_ptt.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/conservation-science.ch\/?page_id=29853#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/conservation-science.ch\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Accueil\",\"item\":\"https:\/\/conservation-science.ch\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Nos astuces\",\"item\":\"https:\/\/conservation-science.ch\/?page_id=29899\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Nos astuces archiv\u00e9es\",\"item\":\"https:\/\/conservation-science.ch\/?page_id=29891\"},{\"@type\":\"ListItem\",\"position\":5,\"name\":\"Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/conservation-science.ch\/#website\",\"url\":\"https:\/\/conservation-science.ch\/\",\"name\":\"CSC - Conservation - Sciences\",\"description\":\"Transmission de connaissances dans le domaine des sciences de la conservation du patrimoine b\u00e2ti\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/conservation-science.ch\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Identification rapide de la source d'efflorescences de sels \u00e0 l'aide d'un papier pH 1-14 - Bl\u00e4uer - Conservation - Science","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/conservation-science.ch\/?page_id=29853","og_locale":"fr_FR","og_type":"article","og_title":"Identification rapide de la source d'efflorescences de sels \u00e0 l'aide d'un papier pH 1-14 - Bl\u00e4uer - Conservation - Science","og_description":"Identification rapide de la source d’efflorescences de sels \u00e0 l’aide d’un papier pH 1-14 Sur les b\u00e2timents, la source d’efflorescences de sels alcalins (pH > 8) est toujours un mat\u00e9riau de construction (ou de restauration\/conservation) lui-m\u00eame alcalin, tel que le ciment, la chaux hydraulique ou le verre soluble (Schaffer, 1932 ; Arnold, 1985). 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