{"id":39921,"date":"2024-09-12T10:49:26","date_gmt":"2024-09-12T08:49:26","guid":{"rendered":"https:\/\/betoff.eu\/?p=39921"},"modified":"2024-09-12T11:02:49","modified_gmt":"2024-09-12T09:02:49","slug":"oldja-fel-a-cementfoliat","status":"publish","type":"post","link":"https:\/\/betoff.eu\/hu\/oldja-fel-a-cementfoliat\/","title":{"rendered":"Oldja fel a cement f\u00f3li\u00e1t"},"content":{"rendered":"\n<p>Oldja fel a cement f\u00f3li\u00e1t. Old\u00f3dik-e a cement v\u00edzben, \u00e9s ha igen, milyen gyorsan? Ez a cikk elmagyar\u00e1zza, hogy a cement felold\u00f3dik-e a v\u00edzben, \u00e9s mi t\u00f6rt\u00e9nik, ha felold\u00f3dik. Mindig azt mondj\u00e1k, hogy a cement egyszer\u0171en sz\u00e9tesik, ha v\u00edzbe teszed. B\u00e1r nem tal\u00e1ltam semmi konkr\u00e9tumot az interneten, a k\u00eds\u00e9rlet v\u00e9grehajt\u00e1sa sor\u00e1n \u00e9rdekes inform\u00e1ci\u00f3kat fedeztem fel.<\/p>\n\n\n\n<p>M\u00c1RKA SZERINT: A <a href=\"http:\/\/betoff.eu\">BETOFF<\/a> \u00c9S A <a href=\"https:\/\/betoff.eu\/hu\/produkt\/betoff-bio-5l-biologiailag-lebomlo-folyadek-beton-oldasara\/\">BETOFF BIO<\/a>-LIQUID K\u00d6NNYEN OLDJA KI A SZ\u00c1RADT CEMENTET. A cementszennyez\u0151d\u00e9s leggyakoribb form\u00e1ja az \u00fagynevezett cementr\u00e9teg. A CEMENT FOLY\u00c1SA UT\u00c1N T\u00d6RT\u00c9NIK EL, Pl. Vigye fel az \u00fcvegre, majd hagyja megsz\u00e1radni. A CEMENTGY\u00daJT\u00d3 V\u00cdZZEL NEM OLDHAT\u00d3. AZ EZ A fajta szennyez\u0151d\u00e9st NAGYON K\u00d6NNYEN ELT\u00c1VOL\u00cdTHATJA EL K\u00c9SZ\u00cdTM\u00c9NYEINKVEL.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"430\" height=\"538\" src=\"https:\/\/betoff.eu\/wp-content\/uploads\/2024\/08\/Betoff-5-L-neu-430x538-2.png\" alt=\"Oldja fel a cement f\u00f3li\u00e1t\" class=\"wp-image-39677\" style=\"width:309px;height:auto\" srcset=\"https:\/\/betoff.eu\/wp-content\/uploads\/2024\/08\/Betoff-5-L-neu-430x538-2.png 430w, https:\/\/betoff.eu\/wp-content\/uploads\/2024\/08\/Betoff-5-L-neu-430x538-2-240x300.png 240w\" sizes=\"auto, (max-width: 430px) 100vw, 430px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t<\/h2>\n\n\n\n<p>A cementhom\u00e1ly \u00e1ltal\u00e1ban k\u00f6d, fagy vagy k\u00f6d form\u00e1j\u00e1ban jelenik meg, ami elsz\u00ednezheti a ker\u00e1mia csemp\u00e9ket a cementk\u00f6t\u00e9sek \u00e9s az ablakok elterjed\u00e9se ut\u00e1n, miut\u00e1n cement \u00f6mlik r\u00e1juk. Az ilyen t\u00edpus\u00fa szennyez\u0151d\u00e9seket speci\u00e1lis tiszt\u00edt\u00f3szerrel kell kezelni.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cement (nem cementiszap) felold\u00e1sa v\u00edzben<\/h2>\n\n\n\n<p>B\u00e1r nem tal\u00e1ltam semmi konkr\u00e9tat a neten, m\u00e9gis felfedeztem n\u00e9h\u00e1ny leny\u0171g\u00f6z\u0151 inform\u00e1ci\u00f3t. P\u00e9ld\u00e1ul a meszet (kalcium-oxidot) \u00fagy \u00e1ll\u00edtj\u00e1k el\u0151, hogy a m\u00e9szk\u00f6vet (kalcium-karbon\u00e1tot) k\u00f6r\u00fclbel\u00fcl 1500 Celsius-fok h\u0151m\u00e9rs\u00e9kletre hev\u00edtik, amelyet azut\u00e1n portlandcement el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra haszn\u00e1lnak fel. A meszet, a homokot \u00e9s az agyagot egyes\u00edtik, \u00e9s finom porr\u00e1 dolgozz\u00e1k fel, amelyet portlandcementnek neveznek. Joseph Aspdin angol k\u0151m\u0171ves 1824-ben tette k\u00f6zz\u00e9 a portlandcement els\u0151 receptj\u00e9t. Ehhez agyag \u00e9s finomra \u0151r\u00f6lt m\u00e9szk\u0151 kever\u00e9k\u00e9nek \u00e9get\u00e9s\u00e9re volt sz\u00fcks\u00e9g. Az anyagot finom porr\u00e1 \u0151r\u00f6lte, miut\u00e1n kemenc\u00e9ben meleg\u00edtette, hogy elt\u00e1vol\u00edtsa a vizet (ezt a folyamatot szinterez\u00e9snek nevezik).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t. Mi t\u00f6rt\u00e9nik, ha a cementet v\u00edzbe mer\u00edtik?<\/h2>\n\n\n\n<p>Mi t\u00f6rt\u00e9nik, ha ezt az anyagot v\u00edzbe mer\u00edtik? M\u00e1s t\u00e9nyez\u0151ket is figyelembe kell venni, bele\u00e9rtve a v\u00edz h\u0151m\u00e9rs\u00e9klet\u00e9t, a pH-t \u00e9s a tov\u00e1bbi vegyszerek jelenl\u00e9t\u00e9t vagy hi\u00e1ny\u00e1t. Old\u00f3dik-e a cement, \u00e9s ha igen, milyen gyorsan? Ez a blog elmagyar\u00e1zza, hogy a cement felold\u00f3dik-e a v\u00edzben, \u00e9s mi t\u00f6rt\u00e9nik, ha felold\u00f3dik. Az \u00e9p\u00edt\u0151iparban sz\u00e1mos ragaszt\u00f3- \u00e9s adal\u00e9kanyagokkal rendelkez\u0151 \u00e9p\u00edt\u0151anyagot cementnek neveznek. A 2-es t\u00edpus\u00fa (m\u00e9rs\u00e9kelt szulf\u00e1t\u00e1ll\u00f3s\u00e1g) \u00e9s az 1-es t\u00edpus\u00fa (sz\u00e9les k\u00f6rben elterjedt) a portlandcement k\u00e9t legn\u00e9pszer\u0171bb t\u00edpusa. A cementpor \u00e9s a v\u00edz k\u00f6z\u00f6tti hidrat\u00e1ci\u00f3s folyamat miatt a cement k\u00f6t\u0151anyag, amely v\u00edzzel keverve id\u0151vel megkem\u00e9nyedik. A portlandcement hidrat\u00e1l\u00e1sa cs\u00f6kkenti a pH-t, ez\u00e1ltal n\u00f6veli a szabad kalciumionok (Ca) mennyis\u00e9g\u00e9t az oldatban. A felszabadul\u00f3 Ca-ionok hat\u00e1s\u00e1ra a cement felold\u00f3dik a v\u00edzben. A cement ez\u00e9rt j\u00f3l old\u00f3d\u00f3nak tekinthet\u0151, az oldhat\u00f3s\u00e1gi term\u00e9k\u00e1lland\u00f3 10-5 \u00e9s 10-6 k\u00f6z\u00f6tt van.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t. K\u00fcl\u00f6nb\u00f6z\u0151 t\u00edpus\u00fa cement<\/h2>\n\n\n\n<p>A hosszabb \u00e9lettartam\u00fa cementek \u00e9s a magasabb m\u00e9szkoncentr\u00e1ci\u00f3j\u00fa (CaO) cementek gyorsabban old\u00f3dnak, mint az \u00fajabb cementek \u00e9s az alacsonyabb m\u00e9sztartalm\u00fa cementek, b\u00e1r ezek a k\u00fcl\u00f6nbs\u00e9gek r\u00f6vid t\u00e1v\u00fa expoz\u00edci\u00f3 eset\u00e9n nem felt\u00e9tlen\u00fcl jelent\u0151sek. A h\u0151m\u00e9rs\u00e9klet, nyom\u00e1s, \u00e1sv\u00e1nytan, polimerek\/kever\u00e9kek \u00e9s egy\u00e9b t\u00e9nyez\u0151k szint\u00e9n befoly\u00e1solhatj\u00e1k az old\u00f3d\u00e1si sebess\u00e9get, b\u00e1r ezek a k\u00fcl\u00f6nbs\u00e9gek r\u00f6vid \u00e9rintkez\u00e9s eset\u00e9n nem felt\u00e9tlen\u00fcl jelent\u0151sek.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t. Ez a blog arr\u00f3l sz\u00f3l, hogy a cement felold\u00f3dik-e a v\u00edzben, \u00e9s mi t\u00f6rt\u00e9nik, ha felold\u00f3dik.<\/h2>\n\n\n\n<p>Amikor megeml\u00edtem, az emberek azt k\u00e9rdezik t\u0151lem, hogy \u201emilyen cement\u201d. Portland cement? Cement kalcium-alumin\u00e1tb\u00f3l vagy cement gipszb\u0151l? <a href=\"http:\/\/betoff.nl\">Mindezek<\/a> a cementt\u00edpusok a vil\u00e1gszerte haszn\u00e1lt sok k\u00f6z\u00fcl. Mivel a portlandcement sz\u00e9les k\u00f6rben el\u00e9rhet\u0151 \u00e9s megfizethet\u0151, a legt\u00f6bb embernek ez jut el\u0151sz\u00f6r esz\u00e9be, amikor meghallja a &#8222;cement&#8221; sz\u00f3t. Azonban amennyire meg tudom \u00edt\u00e9lni, minden m\u00e1s t\u00edpusnak ugyanolyan j\u00f3l fel kell old\u00f3dnia, mint a portlandcementnek, ha elegend\u0151 id\u0151t \u00e9s vizet kap.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t. T\u00e9nyleg lebomlik a cement?<\/h2>\n\n\n\n<p>Ez az els\u0151 k\u00e9rd\u00e9s, amire v\u00e1laszt kell adni. Igen, val\u00f3j\u00e1ban. B\u00e1r lassan elhalv\u00e1nyul, m\u00e9g mindig ott van. Egyszer\u0171en fogalmazva: nem sok! A beton tart\u00f3ss\u00e1ga nagym\u00e9rt\u00e9kben f\u00fcgg a cementpaszta old\u00f3d\u00e1s\u00e1t\u00f3l. A szak\u00e9rt\u0151k a cementr\u00e9szecsk\u00e9k old\u00f3d\u00e1s\u00e1nak h\u00e1tter\u00e9ben \u00e1ll\u00f3 mechanizmusokat kutatj\u00e1k. Mi t\u00f6rt\u00e9nik vele, ha a cementet v\u00edzbe mer\u00edtik? Elp\u00e1rolog, \u00e9s ha igen, milyen gyorsan? K\u00fcl\u00f6nb\u00f6z\u0151 m\u00f3dszerek l\u00e9teznek a boml\u00e1si sebess\u00e9g m\u00e9r\u00e9s\u00e9re. Az ionkoncentr\u00e1ci\u00f3, a pH \u00e9s az elektromos vezet\u0151k\u00e9pess\u00e9g v\u00e1ltoz\u00e1sa felhaszn\u00e1lhat\u00f3 a felbont\u00e1s m\u00e9r\u00e9s\u00e9re. K\u00f6lcs\u00f6n\u00f6s kapcsolataik miatt ezek a v\u00e1ltoz\u00f3k lehet\u0151v\u00e9 teszik, hogy az old\u00f3d\u00e1si sebess\u00e9get az id\u0151 f\u00fcggv\u00e9ny\u00e9ben vizsg\u00e1ljuk.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oldja fel a cement f\u00f3li\u00e1t. Id\u0151 versus felbont\u00e1si ar\u00e1ny<\/h2>\n\n\n\n<p>A blog t\u00e9m\u00e1ja a cement v\u00edzben val\u00f3 sz\u00e9tes\u00e9se lesz. A cement olyan anyag, amelyet minden nap haszn\u00e1lunk k\u00fcl\u00f6nf\u00e9le c\u00e9lokra, bele\u00e9rtve a habarcsot \u00e9s a betont is. De elgondolkozott m\u00e1r azon, hogy mi t\u00f6rt\u00e9nik, ha v\u00edz \u00e9s cement \u00e9rintkezik? Ennek a blognak a c\u00e9lja, hogy v\u00e1laszt adjon erre a k\u00e9rd\u00e9sre. Sok k\u00e9rd\u00e9sre kell v\u00e1laszt adni. Mennyi a cement s\u00falycs\u00f6kken\u00e9se? Teljesen elp\u00e1rolog? Mennyi id\u0151 alatt old\u00f3dik fel a cement? Ez csak n\u00e9h\u00e1ny a k\u00e9rd\u00e9sek k\u00f6z\u00fcl, amelyeket szeretn\u00e9k megvizsg\u00e1lni.<\/p>\n\n\n\n<p>Ez az a pillanat, amikor elkezd\u0151dik a kutat\u00e1si folyamat.<\/p>\n\n\n\n<p>Fogalmam sincs, hogyan kell ennek m\u0171k\u00f6dnie, vagy hol kezdjem, de szeretn\u00e9k egy kis k\u00eds\u00e9rletet v\u00e9gezni, hogy megfigyeljem, mennyi id\u0151 alatt old\u00f3dik fel a cement a v\u00edzben. Tov\u00e1bb\u00e1 fogalmam sincs, mennyi id\u0151t fogok erre a projektre ford\u00edtani, vagy mennyi id\u0151t fogok vele dolgozni naponta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mindent megteszek, ami t\u0151lem telik!<\/h2>\n\n\n\n<p>A tanulm\u00e1ny eredm\u00e9nyei azt mutatj\u00e1k, hogy a sz\u00e9n-dioxid a f\u0151 old\u00f3szer, \u00e9s a cementr\u00e9szecsk\u00e9k v\u00edzben val\u00f3 old\u00f3d\u00e1sa fokozatosan megy v\u00e9gbe. A v\u00edzben oldott sz\u00e9n-dioxid jelenl\u00e9te \u00e1ltal okozott k\u00e9miai reakci\u00f3 t\u00f6bb kalcium-hidroxidot hoz l\u00e9tre. A <a href=\"http:\/\/betoff.dk\">kalcium<\/a>-hidroxid pedig sz\u00e9n-dioxiddal reag\u00e1lva kalcium-karbon\u00e1tot <a href=\"http:\/\/betoff.de\">k\u00e9pez<\/a>, amely elv\u00e1lik az oldatt\u00f3l \u00e9s cementet k\u00e9pez. A kicsap\u00e1si folyamat sor\u00e1n t\u00f6bb kalcium-hidroxid szabadul fel, ami nagyobb old\u00f3d\u00e1st tesz lehet\u0151v\u00e9. Ez egy hosszadalmas folyamatnak t\u0171nik, \u00e9s val\u00f3sz\u00edn\u0171leg nem lesz nagyobb hat\u00e1sa r\u00f6videbb id\u0151n bel\u00fcl, mint a norm\u00e1l beton\u00e9p\u00edt\u00e9si projekteknek. Ennek a vegyi hat\u00e1snak a lehets\u00e9ges hat\u00e1s\u00e1t azonban figyelembe kell venni, ha cementk\u00f6t\u00e9s\u0171 anyagokat betonszerkezetek r\u00e9szek\u00e9nt haszn\u00e1lnak, amelyek hossz\u00fa ideig v\u00edznek vannak kit\u00e9ve. A cement felold\u00e1sa nem k\u00edv\u00e1natos. Kiv\u00e9telt k\u00e9pez a cement vagy beton okozta szennyez\u0151d\u00e9s. A beton szil\u00e1rds\u00e1g\u00e1t \u00e9s kem\u00e9nys\u00e9g\u00e9t ad\u00f3 \u00f6sszetev\u0151 a cement. A beton fokozatosan \u00f6sszeomlik \u00e9s sz\u00e9tesik, ahogy a cement felold\u00f3dik.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A BETOFF FOLYAD\u00c9KOK K\u00d6NNYEN OLDJA KI A SZ\u00c1RADT CEMENTFOLTOKAT!<\/h3>\n\n\n\n<p>A cement k\u00e9miai \u00f6sszet\u00e9tele a felhaszn\u00e1lt cement t\u00edpus\u00e1t\u00f3l f\u00fcgg &#8211; portlandcement, pernye alap\u00fa portlandcement, salakalap\u00fa portlandcement stb. &#8211; a cement \u00f6sszet\u00e9tele jelent\u0151sen v\u00e1ltozhat. \u00cdme a tipikus k\u00e9miai \u00f6sszet\u00e9tel: SiO2 &#8211; 21% Al2O3 &#8211; 5% Fe2O3 &#8211; 3% CaO &#8211; 64% MgO &#8211; 2% SO3 &#8211; 1% K2O + Na2O &#8211; 1% A cement f\u0151 \u00f6sszetev\u0151je a kalcium-szilik\u00e1tok, amelyek hidraulikus cementek, v\u00e1lik. A kalcium-oxid (CaO) \u00e9s a szil\u00edcium-dioxid (SiO2) reakci\u00f3ba l\u00e9pve Si-O-Ca k\u00f6t\u00e9sek j\u00f6nnek l\u00e9tre, amelyek a kalcium-szilik\u00e1tokban tal\u00e1lhat\u00f3k. Kalcium-hidroxid (Ca(OH)2) \u00e9s szilikag\u00e9l k\u00e9pz\u0151dik, amikor a kalcium-szilik\u00e1tok reakci\u00f3ba l\u00e9pnek v\u00edzzel. Ez a folyamat, amelyet hidrat\u00e1l\u00e1si vagy k\u00f6t\u00e9si folyamatnak neveznek, kem\u00e9ny, szil\u00e1rd massz\u00e1t eredm\u00e9nyez, amelyet hidrat\u00e1lt cementpaszt\u00e1nak neveznek.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Oldja fel a cement f\u00f3li\u00e1t. Old\u00f3dik-e a cement v\u00edzben, \u00e9s ha igen, milyen gyorsan? Ez a cikk elmagyar\u00e1zza, hogy a cement felold\u00f3dik-e a v\u00edzben, \u00e9s mi t\u00f6rt\u00e9nik, ha felold\u00f3dik. Mindig azt mondj\u00e1k, hogy a cement egyszer\u0171en sz\u00e9tesik, ha v\u00edzbe teszed. B\u00e1r nem tal\u00e1ltam semmi konkr\u00e9tumot az interneten, a k\u00eds\u00e9rlet v\u00e9grehajt\u00e1sa sor\u00e1n \u00e9rdekes inform\u00e1ci\u00f3kat fedeztem fel. 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