{"product_id":"formoustojchiwost-shpal-iz-pressowannoj-drewesiny-von-ilq-medwedew","title":"Formoustojchiwost' shpal iz pressowannoj drewesiny","description":"\u003cp\u003eV nastoqschee wremq w mire 60 % zheleznyh dorog  ispol'zuüt derewqnnye shpaly. Ostal'noj procent  sostawlqüt zhelezobetonnye, i polimernye shpaly. Srok  sluzhby sosnowoj shpaly sostawlqet ne bolee 12 let,  srok sluzhby zhelezobetonnyh shpal sostawlqet okolo 50  let. Nedostatki prisuschi i zhelezobetonnym shpalam:  otsutstwuet dempfernoe swojstwo u shpaly, iz-za chego  proishodit razrushenie kolesnyh par sostawow;  uwelichenie sluchaew porazheniq lüdej älektricheskim  tokom wsledstwie horoshej prowodimosti toka  zhelezobetonom; wynuzhdennye zameny iz-za iznosa  amortizacionnyh prokladok kazhdye 7¿8 let, chto  priwodit k bol'shim zatratam pri äxpluatacii shpal. Na  lesosekah Rossii ezhegodno sgniwaet porqdka 70 mln. m3  drewesiny mqgkih listwennyh porod bereza, osina,  ol'ha. Shpala, izgotowlennaq iz pressowannoj drewesiny  po swoim fiziko-mehanicheskim pokazatelqm ne ustupaet  derewqnnoj, no srok sluzhby suschestwenno wyshe, chem  derewqnnoj. Odnim iz osnownyh nedostatkow uplotnennoj  drewesiny qwlqetsq nizkaq formoustojchiwost' pri  wozdejstwii wlagi i wody.Dlq powysheniq  formoustojchiwosti predlagaetsq propitat' drewesinu  pered pressowaniem sostawom na osnowe  karbamidoformal'degidnyh soedinenij.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783843325059\"\u003e\u003ch3\u003eTehnologiq powysheniq formoustojchiwosti shpal\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783843325059","offer_id":39485520838749,"sku":"9783843325059","price":59.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/7bb1cdc8-f755-4483-95b2-60acf110c4ad.jpg?v=1773122484","url":"https:\/\/shop.autorenwelt.de\/products\/formoustojchiwost-shpal-iz-pressowannoj-drewesiny-von-ilq-medwedew","provider":"Autorenwelt Shop","version":"1.0","type":"link"}