{"id":1053,"date":"2018-03-18T12:29:17","date_gmt":"2018-03-18T11:29:17","guid":{"rendered":"http:\/\/www.hhtec.eu\/hammer\/?page_id=1053"},"modified":"2018-04-02T08:04:55","modified_gmt":"2018-04-02T07:04:55","slug":"stinici-vlastnosti-betonu","status":"publish","type":"page","link":"http:\/\/www.hhtec.eu\/hammer\/cs\/stinici-vlastnosti-betonu\/","title":{"rendered":"Radiace se zvy\u0161uj\u00edc\u00ed se tlou\u0161\u0165kou betonu"},"content":{"rendered":"<p style=\"text-align: justify;\">Z\u00e1vislost terestri\u00e1ln\u00ed a kosmick\u00e9 slo\u017eky \u1e22*(10) na\u00a0tlou\u0161\u0165ce betonu lze z\u00edskat\u00a0nap\u0159. vrstven\u00edm betonov\u00fdch obrubn\u00edk\u016f o tlou\u0161\u0165ce 80 mm a hustot\u011b 1950 kg\/m3 nad HH.<\/p>\n<p style=\"text-align: justify;\">Terestri\u00e1ln\u00ed slo\u017eka <em>\u1e22*(10) nejprve\u00a0<\/em>nar\u016fst\u00e1, p\u0159i tlou\u0161\u0165ce betonu nad\u00a0160 mm doch\u00e1z\u00ed k jej\u00ed saturaci.\u00a0N\u00e1r\u016fst je d\u00e1n zvy\u0161uj\u00edc\u00edm se mno\u017estv\u00edm primordi\u00e1ln\u00edch radionuklid\u016f (uran, thorium,\u00a0drasl\u00edk K-40) ve vrstv\u011b betonu. Saturace souvis\u00ed se samoabsorpc\u00ed z\u00e1\u0159en\u00ed gama, kter\u00e1 nast\u00e1v\u00e1 od jist\u00e9 tlou\u0161\u0165ky betonu. Z tohoto d\u016fvodu nap\u0159. terestri\u00e1ln\u00ed slo\u017eka radiace v tunelech je odvisl\u00e1 sp\u00ed\u0161e od radiace betonov\u00e9ho ost\u011bn\u00ed ne\u017e od radiace okoln\u00ed horniny.<\/p>\n<p style=\"text-align: justify;\">Kosmick\u00e1 slo\u017eka\u00a0<em>\u1e22*(10) <\/em>naopak s tlou\u0161\u0165kou betonu kles\u00e1.\u00a0 S efektem postupn\u00e9ho zeslaben\u00ed kosmick\u00e9 slo\u017eky z\u00e1\u0159en\u00ed se m\u016f\u017eeme setkat u v\u00edce poscho\u010fov\u00fdch budov s betonov\u00fdmi stropy.<\/p>\n<p style=\"text-align: justify;\">Pozn: Betonov\u00e9 desky lze nahradit deskami ze \u017eeleza nebo olova, m\u011b\u0159en\u00ed lze prov\u00e1d\u011bt v m\u00edst\u011b s n\u00edzk\u00fdm terestri\u00e1ln\u00edm pozad\u00edm.<\/p>\n<p style=\"text-align: justify;\"><a href=\"https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-467\" src=\"https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?resize=474%2C306\" alt=\"\" width=\"474\" height=\"306\" srcset=\"https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?w=977 977w, https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?resize=150%2C97 150w, https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?resize=300%2C194 300w, https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?resize=768%2C496 768w, https:\/\/i0.wp.com\/www.hhtec.eu\/wp-content\/uploads\/Concrete-shielding.jpg?resize=200%2C129 200w\" sizes=\"(max-width: 474px) 100vw, 474px\" data-recalc-dims=\"1\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Z\u00e1vislost terestri\u00e1ln\u00ed a kosmick\u00e9 slo\u017eky \u1e22*(10) na\u00a0tlou\u0161\u0165ce betonu lze z\u00edskat\u00a0nap\u0159. vrstven\u00edm betonov\u00fdch obrubn\u00edk\u016f o tlou\u0161\u0165ce 80 mm a hustot\u011b 1950 kg\/m3 nad HH. Terestri\u00e1ln\u00ed slo\u017eka \u1e22*(10) nejprve\u00a0nar\u016fst\u00e1, p\u0159i tlou\u0161\u0165ce betonu nad\u00a0160 mm doch\u00e1z\u00ed k jej\u00ed saturaci.\u00a0N\u00e1r\u016fst je d\u00e1n zvy\u0161uj\u00edc\u00edm se mno\u017estv\u00edm primordi\u00e1ln\u00edch radionuklid\u016f (uran, thorium,\u00a0drasl\u00edk K-40) ve vrstv\u011b betonu. Saturace souvis\u00ed se samoabsorpc\u00ed z\u00e1\u0159en\u00ed gama, &hellip; <a href=\"http:\/\/www.hhtec.eu\/hammer\/cs\/stinici-vlastnosti-betonu\/\" class=\"more-link\">Pokra\u010dov\u00e1n\u00ed textu <span class=\"screen-reader-text\">Radiace se zvy\u0161uj\u00edc\u00ed se tlou\u0161\u0165kou betonu<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"spay_email":""},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P7T0YT-gZ","_links":{"self":[{"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/pages\/1053"}],"collection":[{"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/comments?post=1053"}],"version-history":[{"count":5,"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/pages\/1053\/revisions"}],"predecessor-version":[{"id":1178,"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/pages\/1053\/revisions\/1178"}],"wp:attachment":[{"href":"http:\/\/www.hhtec.eu\/hammer\/wp-json\/wp\/v2\/media?parent=1053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}