{"id":52,"date":"2026-06-04T09:24:02","date_gmt":"2026-06-04T09:24:02","guid":{"rendered":"https:\/\/wettingagent.net\/?p=52"},"modified":"2026-06-04T09:24:02","modified_gmt":"2026-06-04T09:24:02","slug":"vetnunarefni-litid-vidbotarefni-sem-kemur-i-veg-fyrir-ad-hudun-renni-af-erfidum-yfirbordum","status":"publish","type":"post","link":"https:\/\/wettingagent.net\/is\/vetnunarefni-litid-vidbotarefni-sem-kemur-i-veg-fyrir-ad-hudun-renni-af-erfidum-yfirbordum\/","title":{"rendered":"Vetningarefni: Litla vi\u00f0b\u00f3tin sem kemur \u00ed veg fyrir a\u00f0 h\u00fa\u00f0un renni af erfi\u00f0um yfirbor\u00f0um"},"content":{"rendered":"<div>\n<div>\n<p dir=\"auto\">Eftir meira en tuttugu og fimm \u00e1r \u00ed a\u00f0 \u00fer\u00f3a h\u00fa\u00f0unarefni fyrir m\u00e1lm-, plast- og vi\u00f0aryfirbor\u00f0 hef \u00e9g l\u00e6rt a\u00f0 sl\u00e6m blautnun er ein algengasta \u00e1st\u00e6\u00f0an fyrir \u00fev\u00ed a\u00f0 fullkomlega g\u00f3\u00f0 form\u00fala mistekst \u00e1 verkst\u00e6\u00f0isg\u00f3lfinu. \u00de\u00fa getur haft fram\u00farskarandi litadreifingu, g\u00f3\u00f0an glj\u00e1a og trausta v\u00e9lr\u00e6na eiginleika, en m\u00e1lningin myndar samt perlur, rennur e\u00f0a skilur eftir \u00feurr sv\u00e6\u00f0i \u00e1 undirlaginu. \u00de\u00e1 ver\u00f0a blautunarefni \u00f3missandi. \u00deau l\u00e1ta v\u00f6kvann ekki bara dreifast; \u00feau breyta grundvallaratri\u00f0um \u00ed \u00fev\u00ed hvernig h\u00fa\u00f0unin hefur samskipti vi\u00f0 yfirbor\u00f0i\u00f0 \u00e1\u00f0ur en h\u00fan \u00feornar.<\/p>\n<p dir=\"auto\">Vetnunarefni virka me\u00f0 \u00fev\u00ed a\u00f0 l\u00e6kka yfirbor\u00f0sspennu v\u00f6kva svo h\u00fan geti yfirstigi\u00f0 yfirbor\u00f0sorku undirlagsins. M\u00f6rg i\u00f0na\u00f0arundirl\u00f6g \u2014 ol\u00edumetta\u00f0 st\u00e1l, l\u00e1gorkuplast e\u00f0a jafnvel \u00f6rl\u00edti\u00f0 menga\u00f0 \u00e1l \u2014 hafa yfirbor\u00f0sorku langt undir 40 mN\/m. Venjuleg vatnsbundin h\u00fa\u00f0un \u00e1n a\u00f0sto\u00f0ar er um 45\u201355 mN\/m. Ni\u00f0ursta\u00f0an er h\u00e1r snertivillivinkill og sl\u00e6m \u00fatbrei\u00f0sla. G\u00f3\u00f0ur blautnunarv\u00f6kvi l\u00e6kkar yfirbor\u00f0sspennu v\u00f6kvans ni\u00f0ur \u00ed 25\u201332 mN\/m, sem gerir h\u00fa\u00f0uninni kleift a\u00f0 fl\u00e6\u00f0a jafnt \u00fat og mynda samfellda filmu.<\/p>\n<p dir=\"auto\">\u00dea\u00f0 eru nokkrar efnafr\u00e6\u00f0ilegar fj\u00f6lskyldur. Sil\u00edkonbundin blautunarefni (venjulega p\u00f3l\u00fdeterefldir p\u00f3l\u00edd\u00edmet\u00fdls\u00edloxanar) eru mj\u00f6g \u00e1hrifar\u00edk \u00ed l\u00e1gum sk\u00f6mmtum og veita einnig nokkra jafningu. Fl\u00faorr\u00f3tefni skila sterkustu yfirbor\u00f0sspennul\u00e6kkun og virka vel \u00e1 erfi\u00f0um plasti, en \u00feau eru d\u00fdrari og geta haft \u00e1hrif \u00e1 st\u00f6\u00f0ugleika fro\u00f0u. \u00d3j\u00f3nnandi yfirbor\u00f0svirk efni og akr\u00fdlbundin blautnunarefni bj\u00f3\u00f0a upp \u00e1 jafnari eiginleika me\u00f0 f\u00e6rri aukaverkunum \u00e1 endurh\u00fa\u00f0un e\u00f0a festu milli laga. Vali\u00f0 r\u00e6\u00f0st yfirleitt af undirlagi, epox\u00fdkerfi og \u00fev\u00ed hvort h\u00fa\u00f0unin ver\u00f0i yfirh\u00fa\u00f0u\u00f0 s\u00ed\u00f0ar.<\/p>\n<p dir=\"auto\">\u00c9g man enn eftir verkefni fr\u00e1 fyrir nokkrum \u00e1rum sem s\u00fdndi hagn\u00fdta muninn sk\u00fdrt. Vi\u00f0 vorum a\u00f0 \u00fer\u00f3a vatnsbundinn epox\u00fdgrun fyrir \u00e1l\u00fer\u00fdstingar sem nota\u00f0ir eru \u00ed arkitekt\u00farramma. \u00c1li\u00f0 var hreinsa\u00f0 en bar enn \u00feunnt ox\u00ed\u00f0lag og stundum l\u00e9ttar ol\u00edur vegna me\u00f0h\u00f6ndlunar. \u00c1n nokkurs votgjafa s\u00fdndi grunnm\u00e1lningin alvarlega fl\u00f6gun \u00e1 dr\u00e1ttaprufum \u2014 st\u00f3r sv\u00e6\u00f0i \u00fear sem filmu dr\u00f3gu sig til baka \u00ed eyjar. Snertiv\u00edddin \u00e1 yfirbor\u00f0i raunverulegrar \u00e1lpressu m\u00e6ldist 68\u00b0. Eftir her\u00f0ingu s\u00e1um vi\u00f0 s\u00fdnilega galla og slaka t\u00e6runarv\u00f6rn \u00ed salt\u00fa\u00f0apr\u00f3funum.<\/p>\n<p dir=\"auto\">Vi\u00f0 framkv\u00e6mdum st\u00fdr\u00f0a samanbur\u00f0 me\u00f0 s\u00f6mu grunnform\u00falunni og b\u00e6ttum vi\u00f0 \u00feremur mismunandi blautnunarefnum \u00ed magni 0,4 % virks efnis mi\u00f0a\u00f0 vi\u00f0 heildar\u00feyngd form\u00falunnar:<\/p>\n<ul dir=\"auto\">\n<li>Sta\u00f0la\u00f0 \u00f3j\u00f3n\u00edskt yfirbor\u00f0svirk efni l\u00e6kka\u00f0i yfirbor\u00f0sspennu \u00ed 38 mN\/m og minnka\u00f0i snertivinkulinn \u00ed 42\u00b0. Krabbagangur batna\u00f0i en hvarf ekki; vi\u00f0 t\u00f6ldum samt a\u00f0 me\u00f0altali 7 \u00feurrar blettir \u00e1 hverjum 100 cm\u00b2 \u00e1 \u00fa\u00f0a\u00f0um pl\u00f6tum.<\/li>\n<li>P\u00f3l\u00fdeterefna\u00f0 s\u00edlikon l\u00e6kka\u00f0i yfirbor\u00f0sspennu ni\u00f0ur \u00ed 29 mN\/m og snertivinkul \u00ed 26\u00b0. Krabbagangur hvarf algj\u00f6rlega b\u00e6\u00f0i \u00ed dr\u00e1ttapr\u00f3fum og \u00fa\u00f0apr\u00f3fum \u00ed framlei\u00f0slu. Frammista\u00f0a \u00ed salt\u00fa\u00f0a batna\u00f0i verulega vegna \u00feess a\u00f0 filman var samfelld.<\/li>\n<li>Stuttke\u00f0ju\u00f0 fl\u00faorsambandsvettnislykkja n\u00e1\u00f0i l\u00e6gsta yfirbor\u00f0sspennu (24 mN\/m) og snertivinkli (18\u00b0). H\u00fan gaf fram\u00farskarandi fl\u00e6\u00f0i \u00e1 \u00e1linu, en vi\u00f0 t\u00f3kum eftir sm\u00e1v\u00e6gilegri fro\u00f0u aukningu vi\u00f0 bl\u00f6ndun og l\u00edtilli f\u00e6kkun \u00e1 festu milli laga \u00feegar efri lag var b\u00e6tt \u00e1 s\u00ed\u00f0ar.<\/li>\n<\/ul>\n<p dir=\"auto\">S\u00edlikonbreytta \u00fatg\u00e1fan var sk\u00fdr sigurvegari \u00ed \u00fev\u00ed verki. Vi\u00f0 \u00e1kv\u00e1\u00f0um 0,35 % virkt, b\u00e6tt vi\u00f0 \u00ed letdown-fasanum, og grunnm\u00e1lningin st\u00f3\u00f0st 500 klukkustunda salt\u00fa\u00f0apr\u00f3f \u00e1n t\u00e6ringar undir filmu. Framlei\u00f0slulotur s\u00fdndu st\u00f6\u00f0ugan \u00feykktarv\u00f6xt filmsins og mun f\u00e6rri synjunir vegna \u00fatlits.<\/p>\n<p dir=\"auto\">\u00deessi tilraun styrkti nokkur l\u00e6rd\u00f3msatri\u00f0i sem \u00e9g hef s\u00e9\u00f0 \u00ed m\u00f6rgum verksmi\u00f0jum. \u00cd fyrsta lagi eru skammtastigar nau\u00f0synlegir. V\u00f6kvunarhj\u00e1lparefni s\u00fdna oft s\u00e6tapunkt \u2014 of l\u00edtill skammtur veldur enn g\u00f6llum; of mikill skammtur getur skapa\u00f0 n\u00fd vandam\u00e1l, svo sem aukna fro\u00f0u, minnka\u00f0an glj\u00e1a e\u00f0a festingarvandam\u00e1l. \u00cd \u00f6\u00f0ru lagi skiptir vi\u00f0b\u00f3tarsta\u00f0urinn m\u00e1li. A\u00f0 b\u00e6ta rakat\u00f6kuefni of snemma \u00ed h\u00e1-shear dreifingu getur stundum dregi\u00f0 \u00far virkni \u00feeirra s\u00ed\u00f0ar. \u00cd \u00feri\u00f0ja lagi skaltu alltaf pr\u00f3fa \u00e1 raunverulegu undirlagi frekar en bara \u00ed ranns\u00f3knarstofupr\u00f3fum. H\u00fa\u00f0un sem rennur fullkomlega \u00e1 hreinu st\u00e1li getur brug\u00f0ist \u00e1 framlei\u00f0slustykki sem bera verksmi\u00f0juol\u00edur e\u00f0a fingraf\u00f6r.<\/p>\n<p dir=\"auto\">Af reynslu vir\u00f0ast mestu \u00e1vinningarnir koma \u00feegar skipt er yfir \u00e1 n\u00fdja undirlagi\u00f0 e\u00f0a \u00feegar fari\u00f0 er \u00far leysilausnakerfum yfir \u00ed vatnsbundin kerfi. Vatnsbundnar h\u00fa\u00f0unarefni hafa almennt h\u00e6rri yfirbor\u00f0sspennu, svo \u00feau \u00feurfa meiri a\u00f0sto\u00f0 \u00e1 l\u00e1gorkuplastum e\u00f0a illa undirb\u00fanum m\u00e1lmi. \u00cd einu verkefni vi\u00f0 h\u00fa\u00f0un vi\u00f0ar ger\u00f0i skipti \u00e1 s\u00e9rsni\u00f0num s\u00edlikon-blautunarefni okkur kleift a\u00f0 draga \u00far magni me\u00f0leysiefnis um 15 % og samt n\u00e1 g\u00f3\u00f0ri fl\u00e6\u00f0i \u00e1 ol\u00edukenndum eik \u2014 eitthva\u00f0 sem vi\u00f0skiptavinurinn kunni a\u00f0 meta b\u00e6\u00f0i hva\u00f0 var\u00f0ar kostna\u00f0 og VOC.<\/p>\n<p dir=\"auto\">Au\u00f0vita\u00f0 eru rakagefandi efni ekki t\u00f6fralausn. \u00deau geta ekki leyst \u00far mikilli mengun n\u00e9 algerlega \u00f3samr\u00fdmanlegum samsetningum har\u00f0vara og undirlaga. \u00deau geta einnig haft \u00e1hrif \u00e1 a\u00f0ra eiginleika \u2013 sum auka h\u00e1lku, \u00f6nnur geta dregi\u00f0 \u00far vatns\u00feoli ef ofsk\u00f6mmtun \u00e1 s\u00e9r sta\u00f0. \u00cd kerfum sem h\u00e6gt er a\u00f0 endurh\u00fa\u00f0a k\u00fds \u00e9g yfirleitt mildari akr\u00fdl- e\u00f0a \u00f3j\u00f3ntegundir fremur en sterka s\u00edlik\u00f3na e\u00f0a fl\u00faorr\u00e6na v\u00f6rur.<\/p>\n<p dir=\"auto\">A\u00f0 lokum er blautunarefni eitt af \u00feeim b\u00e6tiefnum sem hafa mest \u00e1hrif \u00ed form\u00falunni \u00feegar undirlagi\u00f0 er ekki fullkomi\u00f0. Verksmi\u00f0jurnar og form\u00faluger\u00f0irnar sem taka \u00feau alvarlega \u2014 framkv\u00e6ma r\u00e9ttar samanbur\u00f0arpr\u00f3fanir \u00e1 raunverulegum hlutum, m\u00e6la yfirbor\u00f0sspennu og snertivinkil \u00fear sem m\u00f6gulegt er og athuga langt\u00edmaframmist\u00f6\u00f0u filmu \u2014 eru \u00fe\u00e6r sem h\u00e6tta a\u00f0 berjast vi\u00f0 \u00fatlitsgalla og byrja a\u00f0 afhenda samr\u00e6mdar og \u00e1rei\u00f0anlegar h\u00fa\u00f0un. \u00deegar r\u00e9tt rakagjafasefni er \u00e1 r\u00e9ttum sta\u00f0 \u00ed r\u00e9ttri styrk, gerir h\u00fa\u00f0unin einfaldlega \u00fea\u00f0 sem h\u00fan \u00e1 a\u00f0 gera: h\u00fan dreifist, festist og verndar \u00e1n \u00feess a\u00f0 draga athygli a\u00f0 s\u00e9r.<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Eftir meira en tuttugu og fimm \u00e1r \u00ed a\u00f0 \u00fer\u00f3a h\u00fa\u00f0unarefni fyrir m\u00e1lm-, plast- og vi\u00f0aryfirbor\u00f0 hef \u00e9g l\u00e6rt a\u00f0 sl\u00e6m blautun er eitt [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"class_list":["post-52","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/posts\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/comments?post=52"}],"version-history":[{"count":1,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/posts\/52\/revisions"}],"predecessor-version":[{"id":53,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/posts\/52\/revisions\/53"}],"wp:attachment":[{"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/media?parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/categories?post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wettingagent.net\/is\/wp-json\/wp\/v2\/tags?post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}