{"id":44350,"date":"2025-01-23T07:14:33","date_gmt":"2025-01-23T06:14:33","guid":{"rendered":"https:\/\/betoff.eu\/?p=44350"},"modified":"2025-01-23T07:14:33","modified_gmt":"2025-01-23T06:14:33","slug":"beton-vystuzeny-vlaknami-coraz-viac-prebera-stavebnictvo","status":"publish","type":"post","link":"https:\/\/betoff.eu\/sk\/beton-vystuzeny-vlaknami-coraz-viac-prebera-stavebnictvo\/","title":{"rendered":"Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami \u010doraz viac preber\u00e1 stavebn\u00edctvo"},"content":{"rendered":"\r\n

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. Pomerne n\u00edzka pevnos\u0165 umel\u00e9ho kame\u0148a v \u0165ahu sa u\u017e viackr\u00e1t rie\u0161ila v predch\u00e1dzaj\u00facich odborn\u00fdch pr\u00e1cach o bet\u00f3ne. Cie\u013eom po\u010detn\u00fdch pokusov o \u00fapravu stavebn\u00e9ho materi\u00e1lu, aby bol lep\u0161\u00ed, je t\u00fato slabinu \u010do najviac odstr\u00e1ni\u0165. To plat\u00ed aj pre „bet\u00f3n vystu\u017een\u00fd vl\u00e1knami“, ktor\u00fd m\u00e1 ove\u013ea vy\u0161\u0161iu pevnos\u0165 v \u0165ahu ako be\u017en\u00fd bet\u00f3n. M\u00e1 v\u0161ak aj nieko\u013eko \u010fal\u0161\u00edch v\u00fdhod.<\/p>\r\n\r\n\r\n\r\n

Ke\u010f\u017ee bet\u00f3n vystu\u017een\u00fd vl\u00e1knami je spevnen\u00fd pr\u00edsadami – zvy\u010dajne oce\u013eou alebo sklom – je menej n\u00e1chyln\u00fd na poru\u0161enie ako be\u017en\u00fd bet\u00f3n. Rovnak\u00fdm sp\u00f4sobom mo\u017eno zv\u00fd\u0161i\u0165 pevnos\u0165 \u017eelezobet\u00f3nu. Prirodzene, existuj\u00fa limity odolnosti vo\u010di nam\u00e1haniu v \u0165ahu. Nakoniec sa pri ve\u013emi vysok\u00fdch za\u0165a\u017eeniach objavia trhliny. Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami v\u0161ak st\u00e1le pon\u00faka v\u00fdhody. Trhliny s\u00fa \u010dasto u\u017e\u0161ie ako v pr\u00edpade be\u017en\u00e9ho bet\u00f3nu, v\u010faka \u010domu s\u00fa menej nebezpe\u010dn\u00e9 pre stabilitu kon\u0161truk\u010dn\u00e9ho prvku.<\/p>\r\n\r\n\r\n\r\n

Aby sme objasnili v\u0161etky nejasnosti, vl\u00e1kna sl\u00fa\u017eia ako „mikrov\u00fdstu\u017e“, ale nenahr\u00e1dzaj\u00fa \u00faplne tradi\u010dn\u00fa oce\u013eov\u00fa v\u00fdstu\u017e vo vysoko za\u0165a\u017een\u00fdch, nosn\u00fdch komponentoch. M\u00f4\u017eete ich v\u0161ak roz\u0161\u00edri\u0165. „\u010cist\u00fd“ vl\u00e1knobet\u00f3n mo\u017eno pou\u017ei\u0165 aj na v\u00fdrobu menej nam\u00e1han\u00fdch komponentov.<\/p>\r\n\r\n\r\n\r\n

Treba poznamena\u0165, \u017ee vl\u00e1knov\u00e1 v\u00fdstu\u017e zvy\u0161uje okrem pevnosti v tlaku a odolnosti bet\u00f3nu proti n\u00e1razu aj jeho pevnos\u0165 v \u0165ahu. Okrem toho sa zvy\u0161uje pru\u017enos\u0165 stavebn\u00e9ho materi\u00e1lu. To umo\u017e\u0148uje v\u00e4\u010d\u0161\u00ed stupe\u0148 deform\u00e1cie bez po\u0161kodenia (stvrdnutej!) hmoty.<\/p>\r\n\r\n\r\n\r\n

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. Vl\u00e1kna z ocele<\/h2>\r\n\r\n\r\n\r\n

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami je relat\u00edvne nov\u00fd, hoci \u017eelezobet\u00f3n m\u00e1 dlh\u00fa hist\u00f3riu, ktor\u00e1 siaha a\u017e do polovice 19. storo\u010dia. V\u00fdvoj t\u00fdchto prvkov sa zintenz\u00edvnil a\u017e od 70. rokov 20. storo\u010dia. Spo\u010diatku to boli bet\u00f3ny s oce\u013eov\u00fdmi vl\u00e1knami, ktor\u00e9 sa v s\u00fa\u010dasnosti vyv\u00edjaj\u00fa a vyu\u017e\u00edvaj\u00fa najm\u00e4 na priemyseln\u00e9 podlahy, v\u00fdstavbu tunelov a \u010doraz v\u00e4\u010d\u0161ie mno\u017estvo bet\u00f3nov\u00fdch prefabrik\u00e1tov.<\/p>\r\n\r\n\r\n\r\n

Zahrnut\u00edm oce\u013eov\u00fdch vl\u00e1kien sa z be\u017en\u00e9ho bet\u00f3nu – ktor\u00fd je pomerne krehk\u00fd – st\u00e1va v\u00fdrazne tvrd\u0161\u00ed kompozitn\u00fd materi\u00e1l. V z\u00e1vislosti od aplik\u00e1cie sa m\u00f4\u017ee pou\u017ei\u0165 len ako doplnok alebo ako \u00fapln\u00e1 n\u00e1hrada oce\u013eovej kon\u0161truk\u010dnej v\u00fdstu\u017ee. Okrem u\u017e uveden\u00fdch oblast\u00ed vyu\u017eitia sa t\u00e1to l\u00e1tka vyskytuje aj pri v\u00fdstavbe ciest a v \u010doraz v\u00e4\u010d\u0161ej miere aj v bytovej architekt\u00fare, kde sa bet\u00f3n s oce\u013eov\u00fdmi vl\u00e1knami pou\u017e\u00edva na steny suter\u00e9nov a podlahov\u00e9 dosky. Pri spracovan\u00ed je v\u00fdhodn\u00e9, ak materi\u00e1l nahr\u00e1dza tradi\u010dn\u00fa v\u00fdstu\u017e, preto\u017ee beton\u00e1\u017e si vy\u017eaduje menej \u00fasilia ako mont\u00e1\u017e \u017eelezobet\u00f3nu, preto\u017ee sa pou\u017e\u00edva hotov\u00fd v\u00fdrobok.<\/p>\r\n\r\n\r\n\r\n

O tom, ak\u00fd stabiliza\u010dn\u00fd \u00fa\u010dinok maj\u00fa oce\u013eov\u00e9 vl\u00e1kna, napokon rozhoduje to, ko\u013eko a ak\u00e9ho druhu sa ich do bet\u00f3nu vlo\u017e\u00ed. Treba zd\u00f4razni\u0165, \u017ee extr\u00e9mne vysok\u00e1 koncentr\u00e1cia vl\u00e1kien m\u00f4\u017ee vies\u0165 k probl\u00e9mom pri spracovan\u00ed, \u010do m\u00f4\u017ee sp\u00f4sobi\u0165, \u017ee zhut\u0148ovanie a \u010derpanie \u010derstv\u00e9ho bet\u00f3nu bude n\u00e1ro\u010dn\u00e9. V d\u00f4sledku toho je potrebn\u00e9 obsah vl\u00e1kien starostlivo zv\u00e1\u017ei\u0165. Ak je v bet\u00f3ne pr\u00edli\u0161 ve\u013ea vl\u00e1kien, m\u00f4\u017ee by\u0165 \u0165a\u017e\u0161ie ho spr\u00e1vne zhutni\u0165, \u010do by mohlo zhor\u0161i\u0165 pevnos\u0165, ktor\u00fa ste chceli zv\u00fd\u0161i\u0165 pomocou pr\u00edsad.<\/p>\r\n\r\n\r\n\r\n

Paradoxne, oce\u013eov\u00e9 vl\u00e1kna podstatne zhor\u0161uj\u00fa u\u017e aj tak pomerne slab\u00fa tepeln\u00fa izol\u00e1ciu bet\u00f3nu. To v\u0161ak nemus\u00ed by\u0165 nev\u00fdhoda, preto\u017ee aspo\u0148 pokia\u013e ide o podlahov\u00e9 vykurovanie, \u010dasto sa uprednost\u0148uje vysok\u00e1 tepeln\u00e1 vodivos\u0165, najm\u00e4 v oblasti poteru.<\/p>\r\n\r\n\r\n\r\n

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. Sklenen\u00e9 vl\u00e1kna<\/h2>\r\n\r\n\r\n\r\n

Textiln\u00fd bet\u00f3n je term\u00edn, ktor\u00fd sa pou\u017e\u00edva, ke\u010f sa do bet\u00f3nu primie\u0161aj\u00fa kompletn\u00e9 roho\u017ee zo sklen\u00fdch vl\u00e1kien.<\/p>\r\n\r\n\r\n\r\n

U\u017e nieko\u013eko rokov rastie aj popularita bet\u00f3nu so sklenen\u00fdmi vl\u00e1knami. Niektor\u00e9 v\u00fdrobky sa vyu\u017e\u00edvaj\u00fa predov\u0161etk\u00fdm na biele vane a potery a maj\u00fa ve\u013emi n\u00edzky obsah vl\u00e1kien (menej ako 0,4 objemov\u00e9ho percenta). Na rozdiel od tovarov s relat\u00edvne vysok\u00fdm obsahom vl\u00e1kien (a\u017e do 5 % objemu) sl\u00fa\u017eia vl\u00e1kna v bet\u00f3ne len na zv\u00fd\u0161enie jeho vodotesnosti a neplnia takmer \u017eiadnu v\u00fdstu\u017en\u00fa funkciu. Ich prim\u00e1rne vyu\u017eitie spo\u010d\u00edva vo vytv\u00e1ran\u00ed drobn\u00fdch, jemne tvarovan\u00fdch bet\u00f3nov\u00fdch dielcov, ktor\u00e9 s\u00fa napriek tomu neuverite\u013ene stabiln\u00e9. Sklenen\u00e9 vl\u00e1kna nehrdzavej\u00fa, a preto nie je potrebn\u00e1 minim\u00e1lna vrstva bet\u00f3nu na ochranu kovu, na rozdiel od bet\u00f3nu, ktor\u00fd obsahuje oce\u013eov\u00e9 alebo oce\u013eov\u00e9 vl\u00e1kna. Pr\u00edpadne je mo\u017en\u00e9 vytvori\u0165 komponenty, ktor\u00e9 s\u00fa hrub\u00e9 len nieko\u013eko milimetrov.<\/p>\r\n\r\n\r\n\r\n

Koncept „textiln\u00e9ho bet\u00f3nu“ je nov\u0161\u00ed. Tvoria ho spojen\u00e9 roho\u017ee zo sklenen\u00fdch vl\u00e1kien namiesto jednotliv\u00fdch sklenen\u00fdch vl\u00e1kien. T\u00fdm sa okrem pevnosti v \u0165ahu v\u00fdrazne zvy\u0161uje aj nosnos\u0165 nad r\u00e1mec v\u0161etk\u00e9ho ostatn\u00e9ho. Testy vykonan\u00e9 na TU Dr\u00e1\u017e\u010fany napr\u00edklad preuk\u00e1zali, \u017ee pridan\u00edm \u010fal\u0161ej vrstvy bet\u00f3nu vystu\u017een\u00e9ho tkaninou mo\u017eno zv\u00fd\u0161i\u0165 nosnos\u0165 \u017eelezobet\u00f3nov\u00fdch dielcov a\u017e o 125 %.<\/p>\r\n\r\n\r\n\r\n

Textiln\u00fd bet\u00f3n m\u00e1 pozoruhodn\u00fa stabilitu pri absencii tradi\u010dnej oce\u013eovej v\u00fdstu\u017ee. Ako pr\u00edklad sl\u00fa\u017eia kon\u0161trukcie, ako napr\u00edklad prv\u00fd most pre pe\u0161\u00edch z bet\u00f3nu vystu\u017een\u00e9ho tkaninou na svete, ktor\u00fd mal premi\u00e9ru v roku 2006 na \u0160t\u00e1tnej z\u00e1hradn\u00edckej v\u00fdstave v Oschatzi v Sasku (pozri fotografiu). Tento most v\u00e1\u017ei celkovo len p\u00e4\u0165 ton a m\u00e1 hr\u00fabku len tri centimetre. Most s podobnou v\u00fdstu\u017eou z bet\u00f3nu by v\u00e1\u017eil pribli\u017ene 25 ton.<\/p>\r\n\r\n\r\n\r\n

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. Vl\u00e1kna z plastu<\/h2>\r\n\r\n\r\n\r\n

Existuj\u00fa aj \u010fal\u0161ie mo\u017enosti vyu\u017eitia bet\u00f3nu so syntetick\u00fdmi vl\u00e1knami, hoci s\u00fa trochu obmedzen\u00e9. Po\u017eiarna odolnos\u0165 \u017eelezobet\u00f3nu sa \u010falej zvy\u0161uje pou\u017eit\u00edm polypropyl\u00e9nu. V pr\u00edpade po\u017eiaru plast hor\u00ed a zanech\u00e1va za sebou drobn\u00e9 kan\u00e1liky, ktor\u00e9 tak funguj\u00fa. To u\u013eah\u010duje \u00fanik vodn\u00fdch p\u00e1r, ktor\u00e9 sa v bet\u00f3ne nahromadia po\u010das po\u017eiaru, a spoma\u013euje r\u00fdchlos\u0165 odlupovania povrchu prvku. To znamen\u00e1 dlh\u0161ie obdobie ochrany oce\u013eovej v\u00fdstu\u017ee pred po\u017eiarom. V\u010faka polypropyl\u00e9nov\u00fdm vl\u00e1knam sa pri tvrdnut\u00ed \u010derstvo polo\u017een\u00e9ho bet\u00f3nu objavuje menej trhl\u00edn. T\u00fato vlastnos\u0165 si ob\u013e\u00fabili najm\u00e4 semen\u00e1\u010di. Napriek tomu plastov\u00e9 vl\u00e1kna v zatvrdnutom bet\u00f3ne v podstate nemaj\u00fa \u017eiadny vplyv na pevnos\u0165 materi\u00e1lu v \u0165ahu a tlaku.<\/p>\r\n\r\n\r\n\r\n

Materi\u00e1ly na b\u00e1ze uhl\u00edka<\/h2>\r\n\r\n\r\n\r\n

Bet\u00f3n vystu\u017een\u00fd uhl\u00edkov\u00fdmi vl\u00e1knami sa tie\u017e len ned\u00e1vno dostal na trh. Ozna\u010duj\u00fa sa aj ako uhl\u00edkov\u00e9 vl\u00e1kna a doteraz sa prim\u00e1rne pou\u017e\u00edvali v plastoch vystu\u017een\u00fdch vl\u00e1knami pre leteck\u00fd a kozmick\u00fd priemysel, automobilov\u00fd priemysel a \u0161portov\u00fa v\u00fdstroj. Bud\u00face vyu\u017eitie v\u00fdnimo\u010dnej pevnosti a n\u00edzkej hmotnosti uhl\u00edkov\u00fdch vl\u00e1kien v kombin\u00e1cii s ich ve\u013ekou flexibilitou by sa malo roz\u0161\u00edri\u0165 aj na bet\u00f3nov\u00e9 v\u00fdrobky.<\/p>\r\n\r\n\r\n\r\n

Pod\u013ea inform\u00e1ci\u00ed od v\u00fdrobcu SGL Group m\u00f4\u017ee tento materi\u00e1l, ktor\u00fd bol doteraz mimoriadne drah\u00fd, \u010dasom dokonca nahradi\u0165 skor\u0161\u00ed \u017eelezobet\u00f3n. V\u00fdvojom tenkostenn\u00fdch bet\u00f3nov\u00fdch kon\u0161trukci\u00ed s odolnos\u0165ou proti kor\u00f3zii by sa stali a\u017e o 75 % \u013eah\u0161\u00edmi, pru\u017enej\u0161\u00edmi a minim\u00e1lne rovnako pevn\u00fdmi ako \u017eelezobet\u00f3n. Mo\u017eno v\u00e1s teda zauj\u00edma, \u010di v najbli\u017e\u0161\u00edch rokoch alebo desa\u0165ro\u010diach tento nov\u00fd v\u00fdvoj prevl\u00e1dne v historicky pomerne konzervat\u00edvnom stavebn\u00edctve.<\/p>\r\n\r\n\r\n\r\n

\u010cistenie bet\u00f3nu vystu\u017een\u00e9ho vl\u00e1knami<\/h2>\r\n\r\n\r\n\r\n

Na\u0161e \u010distiace prostriedky, ako napr\u00edklad tekut\u00fd BETOFF-B<\/a>, s\u00fa ur\u010den\u00e9 nielen na \u010distenie<\/a> be\u017en\u00e9ho bet\u00f3nu, ale aj \u017eelezobet\u00f3nu. Sta\u010d\u00ed nanies\u0165 kvapalinu na zne\u010disten\u00fd bet\u00f3n, po\u010dka\u0165 pribli\u017ene 10 min\u00fat a potom pomocou kefy s m\u00e4kk\u00fdmi \u0161tetinami nanies\u0165 kvapalinu na ne\u010distoty. Nakoniec<\/a> v\u0161etko zmyte vodou a bet\u00f3n je op\u00e4\u0165 \u010dist\u00fd!<\/p>\r\n\r\n\r\n\r\n

\"Bet\u00f3n<\/figure>\r\n\r\n\r\n\r\n

Ako rozp\u00fa\u0161\u0165a\u0165 bet\u00f3n vystu\u017een\u00fd vl\u00e1knami?<\/h2>\r\n\r\n\r\n\r\n

N\u00e1\u0161 najsilnej\u0161\u00ed prostriedok na rozp\u00fa\u0161\u0165anie bet\u00f3nu dok\u00e1\u017ee rozpusti\u0165 ak\u00fdko\u013evek typ bet\u00f3nu vr\u00e1tane \u017eelezobet\u00f3nu. Ak v\u00e1m z\u00e1le\u017e\u00ed na pevnosti a \u00fa\u010dinnosti<\/a>, k\u00fapte si BETOFF<\/a> liquid (koncentr\u00e1t<\/a>).<\/p>\r\n\r\n\r\n\r\n

\"Bet\u00f3n\"<\/figure>\r\n\r\n\r\n","protected":false},"excerpt":{"rendered":"

Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. Pomerne n\u00edzka pevnos\u0165 umel\u00e9ho kame\u0148a v \u0165ahu sa u\u017e viackr\u00e1t rie\u0161ila v predch\u00e1dzaj\u00facich odborn\u00fdch pr\u00e1cach o bet\u00f3ne. Cie\u013eom po\u010detn\u00fdch pokusov o \u00fapravu stavebn\u00e9ho materi\u00e1lu, aby bol lep\u0161\u00ed, je t\u00fato slabinu \u010do najviac odstr\u00e1ni\u0165. To plat\u00ed aj pre „bet\u00f3n vystu\u017een\u00fd vl\u00e1knami“, ktor\u00fd m\u00e1 ove\u013ea vy\u0161\u0161iu pevnos\u0165 v \u0165ahu ako be\u017en\u00fd bet\u00f3n. M\u00e1 v\u0161ak […]\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[571],"tags":[],"class_list":["post-44350","post","type-post","status-publish","format-standard","hentry","category-news-6"],"yoast_head":"\nBet\u00f3n vystu\u017een\u00fd vl\u00e1knami \u010doraz viac preber\u00e1 stavebn\u00edctvo - BETOFF-Produkty pre svet bet\u00f3nu aj mimo neho!<\/title>\n<meta name=\"description\" content=\"Bet\u00f3n vystu\u017een\u00fd vl\u00e1knami. \u010co s\u00fa to vl\u00e1kna na vystu\u017eenie bet\u00f3nu? Ako \u010disti\u0165 bet\u00f3n? Akou tekutinou rozp\u00fa\u0161\u0165a\u0165 bet\u00f3n? 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