{"id":19680,"date":"2020-01-22T11:12:09","date_gmt":"2020-01-22T10:12:09","guid":{"rendered":"https:\/\/www.arno.es\/vialitat-hivernal-com-combatre-el-gel\/"},"modified":"2020-01-22T11:12:09","modified_gmt":"2020-01-22T09:12:09","slug":"vialitat-hivernal-com-combatre-el-gel","status":"publish","type":"post","link":"https:\/\/www.arno.es\/ca\/vialitat-hivernal-com-combatre-el-gel\/","title":{"rendered":"Vialitat hivernal: com combatre el gel"},"content":{"rendered":"

<\/span><\/div><\/div><\/div>

Som al mig de l\u2019hivern, amb la qual cosa la neu, el gel, les pluges, les boires o les ventades poden ser comuns en moltes de les nostres carreteres. Sempre recordem que \u00e9s primordial respectar les normes de circulaci\u00f3 i extremar les precaucions davant d’una meteorologia adversa, aix\u00ed que ho tornem a repetir: prepara les teves sortides per carretera amb antelaci\u00f3 per buscar les millors vies o alternatives, i al volant, atenci\u00f3 i respecte.<\/p>\n

El gel \u00e9s un d’aquests inconvenients que podem trobar-nos, per combatre-ho, els equips de vialitat hivernal utilitzen diferents solucions. D’una banda, hi ha les preventives i de l’altra les curatives, ambdues necess\u00e0ries i importants.<\/p>\n<\/div><\/div><\/div>

\u00c9s important apuntar que el gel no nom\u00e9s repercuteix en la seguretat vi\u00e0ria en el moment en qu\u00e8 es troba a la carretera, tamb\u00e9 influeix en el deteriorament dels ferms pels processos gel-desgla\u00e7 que es produeixen en els mateixos. Per tant, la prevenci\u00f3 de la seva aparici\u00f3 \u00e9s primordial i s’ha de tenir en compte fins i tot en les etapes de projecci\u00f3 de la construcci\u00f3 de la carretera, evitant crear zones d’ombria.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Tipus de fundents<\/strong><\/p>\n

Els fundents s\u00f3n productes, naturals o no, que tenen la propietat d’impedir que es formi gel, baixant el punt de congelaci\u00f3 de l’aigua a temperatures inferiors a O\u00baC o de fondre el gel si ja s’ha format.<\/p>\n<\/div><\/div><\/div>

<\/span><\/div><\/div><\/div><\/div><\/div>

Clorur de Calci (Ca Cl2):<\/strong> \u00e9s un subproducte de la fabricaci\u00f3 de la sosa. \u00c9s d’acci\u00f3 r\u00e0pida i \u00e9s efica\u00e7 fins als -35\u00baC. El problema \u00e9s que \u00e9s 6 vegades m\u00e9s car que el clorur s\u00f2dic, per aix\u00f2 se sol usar barrejant-ho amb el clorur de sodi.<\/p>\n

Clorur S\u00f2dic (Na Cl):<\/strong> Sal comuna, s’extreu de les mines de sal o per evaporaci\u00f3. \u00c9s el producte m\u00e9s utilitzat.<\/p>\n

\u00c9s efica\u00e7 fins -5\u00baC, tot i que la mida dels grans influeix en la seva efic\u00e0cia, es busquen granulometries * petites, ja que com m\u00e9s fins millor romanen sobre la cal\u00e7ada. No obstant aix\u00f2, sempre es necessita una aportaci\u00f3 externa de calories, b\u00e9 del tr\u00e0nsit a el passar per sobre o del sol.<\/p>\n

Clorur de Magnesi (Mg Cl2):<\/strong> \u00e9s un subproducte de la fabricaci\u00f3 de la potassa. T\u00e9 una alta higroscopicitat **. No est\u00e0 indicat per a tractaments preventius perqu\u00e8 afecta negativament a l’adher\u00e8ncia de la carretera.<\/p>\n

A Alemanya \u00e9s m\u00e9s com\u00fa el seu \u00fas perqu\u00e8 \u00e9s m\u00e9s barat que la sal, per\u00f2 a Espanya no s’utilitza.<\/p>\n

Urea (CO (NH2) 2):<\/strong> \u00c9s un producte usat en casos especials ja que t\u00e9 un preu vuit vegades m\u00e9s alt que el de la sal. Necessita aplicar-se amb algun suport, aigua o sorra, perqu\u00e8 romangui sobre la carretera i no \u00e9s gens corrosiu.<\/p>\n

Alcohols i glicols:<\/strong> Aquests tamb\u00e9 s\u00f3n productes molt cars i per tant, utilitzats en llocs especials, com per exemple, aeroports. No se sol usar en vialitat hivernal.<\/p>\n

Un dels principals problemes de les salmorres \u00e9s el seu efecte corrosiu sobre els elements met\u00e0l\u00b7lics de la carretera, per aix\u00f2 es busquen alternatives que segueixin sent viables econ\u00f2micament, que siguin eficaces i disminueixin els efectes negatius.<\/p>\n

En aquest sentit, i amb la intenci\u00f3 de minimitzar els impactes ambientals de l’\u00fas de fundents, fa no gaire parl\u00e0vem del nostre projecte RAISA<\/strong> (Research on Anti-Icing Solutions for Asphalt pavements)<\/a>, que t\u00e9 com a objectius:<\/p>\n

    \n
  1. Reduir la quantitat de sal emprada en actuacions preventives i curatives.<\/li>\n<\/ol>\n
      \n
    • Reduir els costos econ\u00f2mics del manteniment de la vialitat hivernal<\/li>\n
    • Reduir els costos ambientals de la vialitat hivernal.<\/li>\n<\/ul>\n
        \n
      1. Incrementar la vida \u00fatil dels paviments sotmesos a operacions de manteniment de vialitat hivernal.<\/li>\n
      2. Reutilitzar residus com PFU*** en major proporci\u00f3 que en qualsevol altra aplicaci\u00f3 desenvolupada fins al moment.<\/li>\n<\/ol>\n

        Termes:<\/strong><\/p>\n

        * Granulometria:<\/strong> Mesura i graduaci\u00f3 que es porta a terme dels grans d’un material.<\/p>\n

        ** Higroscopicitat:<\/strong> capacitat d’absorci\u00f3 de la humitat. La tenen alguns cossos inorg\u00e0nics i tots els org\u00e0nics.<\/p>\n

        *** PFU:<\/strong> Pneum\u00e0tic fora d’\u00fas.<\/p>\n<\/div><\/div><\/div>

        <\/div><\/div>
        <\/span><\/div><\/div><\/div>
        <\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":11,"featured_media":18973,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-19680","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"yoast_head":"\nVialitat hivernal: com combatre el gel - Benito Arn\u00f3<\/title>\n<meta name=\"description\" content=\"Vialitat hivernal: com combatre el gel -\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.arno.es\/ca\/vialitat-hivernal-com-combatre-el-gel\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vialitat hivernal: com combatre el gel - Benito Arn\u00f3\" \/>\n<meta property=\"og:description\" content=\"Vialitat hivernal: com combatre el gel -\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.arno.es\/ca\/vialitat-hivernal-com-combatre-el-gel\/\" \/>\n<meta property=\"og:site_name\" content=\"Benito Arn\u00f3\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/BenitoArno\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-01-22T10:12:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.arno.es\/wp-content\/uploads\/2020\/01\/20200122-vialidad-invernal-hielo-cap-web-arno.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"informatica\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@benito_arno\" \/>\n<meta name=\"twitter:site\" content=\"@benito_arno\" \/>\n<meta name=\"twitter:label1\" content=\"Escrit per\" \/>\n\t<meta name=\"twitter:data1\" content=\"informatica\" \/>\n\t<meta name=\"twitter:label2\" content=\"Temps estimat de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"14 minuts\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/\"},\"author\":{\"name\":\"informatica\",\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/#\\\/schema\\\/person\\\/bac84f64370d13c669d46ad180f7ae59\"},\"headline\":\"Vialitat hivernal: com combatre el gel\",\"datePublished\":\"2020-01-22T10:12:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/\"},\"wordCount\":2908,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.arno.es\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/20200122-vialidad-invernal-hielo-cap-web-arno.png\",\"inLanguage\":\"ca\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/\",\"url\":\"https:\\\/\\\/www.arno.es\\\/ca\\\/vialitat-hivernal-com-combatre-el-gel\\\/\",\"name\":\"Vialitat hivernal: com combatre el gel - 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