[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.hrazdila.cz\/drevo-stavebni-material-z-obnovitelneho-zdroje\/#Article","mainEntityOfPage":"https:\/\/www.hrazdila.cz\/drevo-stavebni-material-z-obnovitelneho-zdroje\/","headline":"D\u0159evo \u2013 Stavebn\u00ed materi\u00e1l z obnoviteln\u00e9ho zdroje","name":"D\u0159evo \u2013 Stavebn\u00ed materi\u00e1l z obnoviteln\u00e9ho zdroje","description":"Ve stavebnictv\u00ed je d\u0159evo zn\u00e1mo ji\u017e po mnoho generac\u00ed. S v\u00fdvojem lidstva se i zdokonalovalo vyu\u017eit\u00ed d\u0159eva v architektu\u0159e – od oby\u010dejn\u00fdch ch\u00fd\u0161\u00ed a opevn\u011bn\u00ed a\u017e k sou\u010dasnosti. Co se t\u00fdk\u00e1 zalesn\u011bn\u00ed na\u0161eho \u00fazem\u00ed, tedy \u010cesk\u00e9 republiky, jedn\u00e1 se p\u0159ibli\u017en\u011b o 1\/3 rozlohy, ale vinou p\u0159\u00edrodn\u00edch katastrof a cizopasn\u00e9ho hmyzu, se tato plocha pomalu ale...","datePublished":"2019-06-05","dateModified":"2023-06-02","author":{"@type":"Person","@id":"https:\/\/www.hrazdila.cz\/author\/#Person","name":"","url":"https:\/\/www.hrazdila.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/4faace62981be50719be6a25151192978e6d585737a520836dcb98934de3bb45?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4faace62981be50719be6a25151192978e6d585737a520836dcb98934de3bb45?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"hrazdila.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.hrazdila.cz\/wp-content\/uploads\/img_a347197_w2926_t1561389727.jpg","url":"https:\/\/www.hrazdila.cz\/wp-content\/uploads\/img_a347197_w2926_t1561389727.jpg","height":0,"width":0},"url":"https:\/\/www.hrazdila.cz\/drevo-stavebni-material-z-obnovitelneho-zdroje\/","about":["Domov"],"wordCount":550,"articleBody":"Ve stavebnictv\u00ed je d\u0159evo zn\u00e1mo ji\u017e po mnoho generac\u00ed. S v\u00fdvojem lidstva se i zdokonalovalo vyu\u017eit\u00ed d\u0159eva v architektu\u0159e – od oby\u010dejn\u00fdch ch\u00fd\u0161\u00ed a opevn\u011bn\u00ed a\u017e k sou\u010dasnosti.Co se t\u00fdk\u00e1 zalesn\u011bn\u00ed na\u0161eho \u00fazem\u00ed, tedy \u010cesk\u00e9 republiky, jedn\u00e1 se p\u0159ibli\u017en\u011b o 1\/3 rozlohy, ale vinou p\u0159\u00edrodn\u00edch katastrof a cizopasn\u00e9ho hmyzu, se tato plocha pomalu ale jist\u011b zmen\u0161uje.D\u0159evo m\u016f\u017eeme rozd\u011blit podle druhu a podle kvality. Je proto d\u016fle\u017eit\u00e9 zn\u00e1t jeho vlastnosti a ty potom vyu\u017e\u00edt ve sv\u016fj prosp\u011bch.PEVNOST D\u0158EVA: Je z\u00e1visl\u00e1 na kvalit\u011b d\u0159eva a odolnosti, v\u016f\u010di jeho poru\u0161en\u00ed. To ovliv\u0148uje p\u0159edev\u0161\u00edm struktura, hustota vl\u00e1ken a jejich stavba a vlhkost. Pokud je d\u0159evo se\u0159\u00edznuto rovnob\u011b\u017en\u011b s vl\u00e1kny, je jeho pevnost n\u011bkolikan\u00e1sobn\u011b v\u011bt\u0161\u00ed, ne\u017e pokud ho se\u0159\u00edzneme kolmo na vl\u00e1kna.TVRDOST: Hustota d\u0159evn\u00edho vl\u00e1kna a jeho skladba ovliv\u0148uje tvrdost d\u0159eva. \u010c\u00edm je hustota t\u011bchto vl\u00e1ken v\u011bt\u0161\u00ed, t\u00edm je d\u0159evo tvrd\u0161\u00ed. U n\u00e1s m\u016f\u017eeme mezi tyto stromy \u0159adit dub, buk nebo habr.SCHNUT\u00cd D\u0158EVA A JEHO BOBTN\u00c1N\u00cd: Strom, kter\u00fd vid\u00edme norm\u00e1ln\u011b vyr\u016fstat, obsahuje ze 70% vzduch a vodu. Jakmile se strom pok\u00e1c\u00ed, obsah vody se automaticky sn\u00ed\u017e\u00ed zhruba na 15%. Podle teploty vzduchu a vlhkosti vzduchu, doch\u00e1z\u00ed k sesych\u00e1n\u00ed d\u0159eva. To m\u00e1 za n\u00e1sledek jeho tvarov\u00e9 zm\u011bny. Pokud bychom nechali d\u0159evo vyschnout v\u00edce, ne\u017e se po\u017eaduje p\u0159i jeho zpracov\u00e1n\u00ed, m\u011blo by to za n\u00e1sledek, \u017ee d\u0159evo by za\u010dalo nab\u00edrat okoln\u00ed vzduch a za\u010dalo by m\u011bnit sv\u00e9 rozm\u011bry – zv\u011bt\u0161ovalo by se, tud\u00ed\u017e bobtnalo by.OCHRANA D\u0158EVA: Abychom ochr\u00e1nili d\u0159evo, kter\u00e9 jsme zabudovali do stavby \u010di do exteri\u00e9ru, vyu\u017e\u00edv\u00e1me k tomu oleje na p\u0159\u00edrodn\u00ed b\u00e1zi nebo p\u0159\u00edmo chemickou ochranu. Jde n\u00e1m hlavn\u011b o to, aby d\u0159evo vydr\u017eelo d\u00e9le pou\u017eiteln\u00e9. D\u0159ev\u011bn\u00e9 prvky se sna\u017e\u00edme hlavn\u011b chr\u00e1nit p\u0159ed cizopasn\u00fdm hmyzem a r\u016fzn\u00fdmi typy hub. Pokud by bylo d\u0159evo ji\u017e napadeno, je mnohem v\u00fdhodn\u011bj\u0161\u00ed pou\u017e\u00edt chemickou ochranu. M\u00e1te v\u011bt\u0161\u00ed jistotu, \u017ee p\u0159\u00edpadn\u00fd hmyz doopravdy zem\u0159e.Nej\u010dast\u011bji je v souvislosti s dom\u00e1cnostmi vyu\u017e\u00edv\u00e1na beztlakov\u00e1 metoda, kdy se sna\u017e\u00edme, na nov\u00e9 nebo ji\u017e po\u0161kozen\u00e9 d\u0159evo, dostat ochranu dovnit\u0159 d\u0159eva – nat\u00edr\u00e1me, st\u0159\u00edk\u00e1me, nam\u00e1\u010d\u00edme.Existuj\u00ed n\u00e1t\u011bry, kter\u00e9 pom\u00e1haj\u00ed k “neho\u0159lavosti“ d\u0159ev\u011bn\u00fdch prvk\u016f. Tyto l\u00e1tky bu\u010fto zpomaluj\u00ed ho\u0159en\u00ed, nebo urychluj\u00ed vznik ochrany, kter\u00e1 na povrchu d\u0159eva vytvo\u0159\u00ed vrstvu, a t\u00edm chr\u00e1n\u00ed ur\u010ditou dobu d\u0159evo p\u0159ed t\u00edm, aby neproho\u0159elo. Lesy, kter\u00e9 k\u00e1c\u00edme, bychom m\u011bli i ochra\u0148ovat. Aby i na\u0161e pravnou\u010data v\u011bd\u011bli, jak von\u00ed \u010derstv\u011b po\u0159ezan\u00e9 d\u0159evo nebo vid\u011bli, jak je to kr\u00e1sn\u00e9 v na\u0161ich \u010desk\u00fdch les\u00edch.                                                                                                                                                                                                                                                                                                                                                                                         3.4\/5 - (7 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"D\u0159evo \u2013 Stavebn\u00ed materi\u00e1l z obnoviteln\u00e9ho zdroje","item":"https:\/\/www.hrazdila.cz\/drevo-stavebni-material-z-obnovitelneho-zdroje\/#breadcrumbitem"}]}]