{"id":2539,"date":"2020-07-07T18:00:00","date_gmt":"2020-07-07T16:00:00","guid":{"rendered":"https:\/\/beta.svetkamene.eu\/?p=2539"},"modified":"2022-06-11T23:51:36","modified_gmt":"2022-06-11T21:51:36","slug":"anizotropie-strzegomske-zuly","status":"publish","type":"post","link":"https:\/\/svetkamene.eu\/index.php\/cs\/2020\/07\/07\/anizotropie-strzegomske-zuly\/","title":{"rendered":"ANIZOTROPIE STRZEGOMSK\u00c9 \u017dULY"},"content":{"rendered":"\n

Sta\u0159\u00ed kamen\u00edci ze Strzegomi dob\u0159e v\u011bd\u011bli, z kter\u00e9 strany a v jak\u00e9m sm\u011bru ude\u0159it do kamene, aby se rovnom\u011brn\u011b rozlomil. Rovn\u011b\u017e nebylo n\u00e1hodou, \u017ee mont\u00e1\u017e hotov\u00fdch v\u00fdrobk\u016f obvykle prob\u00edhala v ur\u010dit\u00e9m sm\u011bru od z\u00e1kladny. Kamen\u00edk toti\u017e v\u011bd\u011bl, ve kter\u00e9m sm\u011bru je \u017eula pevn\u011bj\u0161\u00ed a ve kter\u00e9m se sn\u00e1ze opracuje.<\/strong><\/p>\n\n\n\n

<\/div>\n\n\n\n

V\u00fd\u0161e uveden\u00e1 pozorov\u00e1n\u00ed souvisej\u00ed s anizotropi\u00ed \u017euly, tj. s r\u016fzn\u00fdmi vlastnostmi \u017euly v z\u00e1vislosti na zp\u016fsobu zkoum\u00e1n\u00ed. Jsou pevn\u011b spjaty se sm\u011brem ulo\u017een\u00ed, tj. s um\u00edst\u011bn\u00edm ve vztahu k m\u00edstu, ve kter\u00e9m se k\u00e1men nach\u00e1zel v lo\u017eisku p\u0159ed jeho vyt\u011b\u017een\u00edm. M\u016f\u017eeme hovo\u0159it o rovin\u00e1ch anizotropie, kter\u00e9 n\u00e1m budou slou\u017eit jako op\u011brn\u00e9 body p\u0159i popisu zp\u016fsobu zkoum\u00e1n\u00ed vlastnost\u00ed strzegomsk\u00e9 \u017euly.<\/p>\n\n\n\n

Pro \u00fa\u010dely v\u00fdzkumu jsem vybral \u010dty\u0159i funk\u010dn\u00ed vlastnosti kamene, kter\u00e9 b\u00fdvaj\u00ed nej\u010dast\u011bji testov\u00e1ny b\u011bhem typov\u00fdch zkou\u0161ek. V\u00fdsledek t\u011bchto zkou\u0161ek z\u00e1vis\u00ed na sm\u011bru m\u011b\u0159en\u00ed:
\u2013 pevnost v ohybu podle EN 12372
\u2013 pevnost v tlaku podle EN 1926
\u2013 koeficient absorpce kapil\u00e1rn\u00ed vody podle EN 1925
\u2013 tr\u017en\u00e9 zat\u00ed\u017een\u00ed v otvoru pro kol\u00edk podle EN 13364<\/p>\n\n\n\n

S p\u0159ihl\u00e9dnut\u00edm k tomu, \u017ee o jednotliv\u00fdch testech bylo ji\u017e v minulosti na str\u00e1nk\u00e1ch \u010dasopisu Kurier Kamieniarski pojedn\u00e1no, nebudu se zde zab\u00fdvat jejich metodikou.<\/p>\n\n\n\n

\n
\"\"<\/figure>\n<\/figure>\n\n\n\n
<\/div>\n\n\n\n

Pevnost v ohybu
<\/strong>Tohoto testu se typicky pou\u017eije u ploch\u00fdch a podlouhl\u00fdch v\u00fdrobk\u016f jako jsou nap\u0159\u00edklad obrubn\u00edky, dla\u017eebn\u00ed desky, podlahov\u00e9 dla\u017edice \u010di svisl\u00e9 obklady. Ve studii uva\u017eujeme t\u0159i mo\u017enosti: lomov\u00e9 zat\u00ed\u017een\u00ed je sm\u011brov\u00e1no kolmo k anizotropn\u00edm rovin\u00e1m (obr. 1), lomov\u00e9 zat\u00ed\u017een\u00ed je sm\u011brov\u00e1no rovnob\u011b\u017en\u011b s anizotropn\u00edmi rovinami (obr. 2), lomov\u00e9 zat\u00ed\u017een\u00ed je sm\u011brov\u00e1no kolmo k okraj\u016fm anizotropn\u00edch rovin (obr. 3).<\/p>\n\n\n\n

\n
\"\"<\/figure>\n<\/figure>\n\n\n\n

Jak ukazuje tabulka 1, pokles pevnosti je v\u00fdznamn\u00fd.<\/p>\n\n\n\n

Zkou\u0161ka<\/strong><\/td>E<\/strong>i<\/strong><\/sub><\/td>Varia\u010dn\u00ed koeficient<\/strong><\/td>Pr\u016fm\u011brn\u00e1 hodnota<\/strong><\/td>Zm\u011bna<\/strong><\/td><\/tr>
1<\/strong><\/td>13,9<\/strong><\/td>0,03<\/strong><\/td>14,8<\/strong><\/td><\/td><\/tr>
2<\/strong><\/td>9,3<\/strong><\/td>0,06<\/strong><\/td>10,6<\/strong><\/td>-28 %<\/strong><\/td><\/tr>
3<\/strong><\/td>11,8<\/strong><\/td>0,04<\/strong><\/td>13,2<\/strong><\/td>-11 %<\/strong><\/td><\/tr><\/tbody><\/table>
Tab. 1: V\u00fdsledky m\u011b\u0159en\u00ed pevnosti v ohybu v z\u00e1vislosti na sm\u011bru proveden\u00ed zkou\u0161ky<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Pevnost v tlaku
<\/strong>Pevnost v tlaku je charakteristickou vlastnost\u00ed v\u00fdrobk\u016f maj\u00edc\u00edch kubick\u00fd tvar, nap\u0159\u00edklad dla\u017eebn\u00edch kostek. P\u0159i tomto testu uva\u017eujeme dv\u011b mo\u017enosti pou\u017eit\u00ed destruktivn\u00ed s\u00edly: kolm\u00e9 (obr. 4) a rovnob\u011b\u017en\u00e9 (obr. 5) na roviny anizotropie.<\/p>\n\n\n\n

V\u00fdsledky testu v tabulce 2 op\u011bt nazna\u010duj\u00ed v\u00fdznamn\u00e9 sn\u00ed\u017een\u00ed pevnosti.<\/p>\n\n\n\n

Zkou\u0161ka<\/strong><\/td>E<\/strong>i<\/strong><\/sub><\/td>Varia\u010dn\u00ed koeficient<\/strong><\/td>Pr\u016fm\u011brn\u00e1 hodnota<\/strong><\/td>Zm\u011bna<\/strong><\/td><\/tr>
4<\/strong><\/td>176<\/strong><\/td>0,04<\/strong><\/td>186<\/strong><\/td><\/td><\/tr>
5<\/strong><\/td>147<\/strong><\/td>0,04<\/strong><\/td>160<\/strong><\/td>-14 %<\/strong><\/td><\/tr><\/tbody><\/table>
Tab. 2: V\u00fdsledky m\u011b\u0159en\u00ed pevnosti v tlaku v z\u00e1vislosti na sm\u011bru proveden\u00ed zkou\u0161ky<\/em><\/figcaption><\/figure>\n\n\n\n
\"\"\/<\/figure>\n\n\n\n

Tr\u017en\u00e9 zat\u00ed\u017een\u00ed v otvoru pro kol\u00edk
<\/strong>\u00da\u010delem t\u00e9to zkou\u0161ky je ov\u011b\u0159en\u00ed, zda u fas\u00e1dn\u00edho panelu zav\u011b\u0161en\u00e9ho na kotv\u00e1ch nedojde k po\u0161kozen\u00ed v m\u00edst\u011b instalace kotev a zda jeho pou\u017e\u00edv\u00e1n\u00ed nebude p\u0159edstavovat hrozbu pro u\u017eivatele. U zkou\u0161ky budeme uva\u017eovat t\u0159i p\u0159\u00edpady: zat\u00ed\u017een\u00ed kolm\u00e9 k rovin\u00e1m anizotropie (obr. 6), rovnob\u011b\u017en\u00e9 s rovinami anizotropie (obr. 7) a rovnob\u011b\u017en\u00e9 s hranami rovin anizotropie (obr. 8).<\/p>\n\n\n\n

Jak je patrn\u00e9 z \u00fadaj\u016f v tabulce 3, s\u00edla, kterou je pot\u0159eba p\u016fsobit na mont\u00e1\u017en\u00ed kol\u00edk tak, aby do\u0161lo k jeho odtr\u017een\u00ed spole\u010dn\u011b s materi\u00e1lem, je mimo jin\u00e9 z\u00e1visl\u00e1 na sm\u011bru proveden\u00ed zkou\u0161ky.<\/p>\n\n\n\n

Zkou\u0161ka<\/strong><\/td>Vzd\u00e1lenost od st\u0159edu mont\u00e1\u017en\u00edho otvoru<\/strong><\/td>Odtrhov\u00e1 s\u00edla<\/strong><\/td>Zm\u011bna<\/strong><\/td><\/tr>
6<\/strong><\/td>45 mm<\/strong><\/td>2450 N<\/strong><\/td><\/td><\/tr>
7<\/strong><\/td>38 mm<\/strong><\/td>1750 N<\/strong><\/td>-29 %<\/strong><\/td><\/tr>
8<\/strong><\/td>60 mm<\/strong><\/td>2100 N<\/strong><\/td>-14 %<\/strong><\/td><\/tr><\/tbody><\/table>
Tab. 3: Testov\u00e1n\u00ed mezn\u00edho zat\u00ed\u017een\u00ed v otvoru hmo\u017edinky <\/em>
v z\u00e1vislosti na sm\u011bru proveden\u00ed zkou\u0161ky<\/em><\/figcaption><\/figure>\n\n\n\n
\"gsf2.jpg\"\/<\/figure>\n\n\n\n
<\/div>\n\n\n\n

Kapil\u00e1rn\u00ed absorpce
<\/strong>Je patrn\u00e9, \u017ee kapil\u00e1rn\u00ed absorpce prob\u00edh\u00e1 pro r\u016fzn\u00e9 roviny anizotropie odli\u0161n\u011b. Uva\u017eujeme dva p\u0159\u00edpady uspo\u0159\u00e1d\u00e1n\u00ed kapil\u00e1r. Svisle k vodn\u00ed hladin\u011b (obr. 5) a vodorovn\u011b k vodn\u00ed hladin\u011b (obr. 4). Fotografie na n\u00e1sleduj\u00edc\u00ed stran\u011b ukazuje dva vzorky vlo\u017een\u00e9 do kyvety s vodou na
60 minut \u2013 v z\u00e1vislosti na uspo\u0159\u00e1d\u00e1n\u00ed kapil\u00e1r se rychlost absorpce vody li\u0161ila.<\/p>\n\n\n\n

Zkou\u0161ka<\/strong><\/td>Pr\u016fm\u011brn\u00e1 hodnota<\/strong><\/td><\/tr>
4<\/strong><\/td>1,1 g\/m<\/strong>2<\/strong><\/sup>s<\/strong>05<\/strong><\/sup><\/td><\/tr>
5<\/strong><\/td>2,4 g\/m<\/strong>2<\/strong><\/sup>s<\/strong>05<\/strong><\/sup><\/td><\/tr><\/tbody><\/table>
Tab. 4: Kapil\u00e1rn\u00ed absorpce<\/em><\/figcaption><\/figure>\n\n\n\n
\"gsf4.jpg\"\/<\/figure>\n\n\n\n

Modern\u00ed technologie a \u00fa\u010dinn\u00e9 stroje umo\u017e\u0148uj\u00ed zna\u010dn\u011b r\u016fznorod\u00e9 zp\u016fsoby opracov\u00e1n\u00ed kamene. Pr\u00e1ce, kterou tyto stroje vykon\u00e1vaj\u00ed, ji\u017e nen\u00ed jen v\u00fdsledkem \u010dinnosti lidsk\u00fdch rukou. Mo\u017en\u00e1 proto upadaj\u00ed v zapomn\u011bn\u00ed starobyl\u00e9 kamenick\u00e9 techniky. Sta\u0159\u00ed kamen\u00edci ze Strzegomu si byli velmi dob\u0159e v\u011bdomi, \u017ee nelze v\u011bnovat pozornost pouh\u00e9 hospod\u00e1rnosti a v\u00fdt\u011b\u017eku, jeliko\u017e sm\u011br \u0159ezu kamene ve vztahu k doln\u00edmu uspo\u0159\u00e1d\u00e1n\u00ed skaln\u00ed vrstvy m\u00e1 v\u00fdrazn\u00fd dopad na opracovatelnost a trvanlivost produktu i jeho n\u00e1sledn\u00fd vzhled. V sou\u010dasn\u00e9 kamenick\u00e9 praxi se bohu\u017eel na ot\u00e1zky anizotropie p\u0159i prov\u00e1d\u011bn\u00ed prvk\u016f \u010dasto zapom\u00edn\u00e1 a v\u00fdt\u011b\u017enost blok\u016f a desek se jev\u00ed jako jedin\u00fd parametr zohled\u0148ovan\u00fd p\u0159i zpracov\u00e1n\u00ed kamene.<\/p>\n\n\n\n

<\/div>\n\n\n\n

Zdroj: Kurier kamieniarski<\/a><\/p>\n\n\n\n

Autor: Micha\u0142 Firlej | Publikov\u00e1no: 07. kv\u011btna 2018<\/p>\n\n\n\n


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Sta\u0159\u00ed kamen\u00edci ze Strzegomi dob\u0159e v\u011bd\u011bli, z kter\u00e9 strany a v jak\u00e9m sm\u011bru ude\u0159it do kamene, aby se…<\/p>\n","protected":false},"author":23,"featured_media":2540,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[345],"tags":[],"yoast_head":"\nANIZOTROPIE STRZEGOMSK\u00c9 \u017dULY - Sv\u011bt Kamene<\/title>\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.kurierkamieniarski.pl\/artykuly\/o-kamieniu\/898-anizotropia-granitu-strzegomskiego.html\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ANIZOTROPIE STRZEGOMSK\u00c9 \u017dULY - Sv\u011bt Kamene\" \/>\n<meta property=\"og:description\" content=\"Sta\u0159\u00ed kamen\u00edci ze Strzegomi dob\u0159e v\u011bd\u011bli, z kter\u00e9 strany a v jak\u00e9m sm\u011bru ude\u0159it do kamene, aby se...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kurierkamieniarski.pl\/artykuly\/o-kamieniu\/898-anizotropia-granitu-strzegomskiego.html\" \/>\n<meta property=\"og:site_name\" content=\"Sv\u011bt Kamene\" \/>\n<meta property=\"article:published_time\" content=\"2020-07-07T16:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-11T21:51:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/svetkamene.eu\/wp-content\/uploads\/2021\/01\/gsf0.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"345\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napsal(a)\" \/>\n\t<meta name=\"twitter:data1\" content=\"Micha\u0142 Firlej\" \/>\n\t<meta name=\"twitter:label2\" content=\"Odhadovan\u00e1 doba \u010dten\u00ed\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minut\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/svetkamene.eu\/#website\",\"url\":\"https:\/\/svetkamene.eu\/\",\"name\":\"Sv\u011bt Kamene\",\"description\":\"Port\u00e1l informuj\u00edc\u00ed o v\u0161em co souvis\u00ed s kamenem\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/svetkamene.eu\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"cs\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"cs\",\"@id\":\"https:\/\/www.kurierkamieniarski.pl\/artykuly\/o-kamieniu\/898-anizotropia-granitu-strzegomskiego.html#primaryimage\",\"url\":\"https:\/\/svetkamene.eu\/wp-content\/uploads\/2021\/01\/gsf0.jpg\",\"contentUrl\":\"https:\/\/svetkamene.eu\/wp-content\/uploads\/2021\/01\/gsf0.jpg\",\"width\":640,\"height\":345,\"caption\":\"pohled na kamenn\u00e9 bloky velikosti kontejneru a\u017e mal\u00e9ho vozidla\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.kurierkamieniarski.pl\/artykuly\/o-kamieniu\/898-anizotropia-granitu-strzegomskiego.html#webpage\",\"url\":\"https:\/\/www.kurierkamieniarski.pl\/artykuly\/o-kamieniu\/898-anizotropia-granitu-strzegomskiego.html\",\"name\":\"ANIZOTROPIE STRZEGOMSK\u00c9 \u017dULY - 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