"0"^^ . "\"B\u011Bhem po\u010D\u00E1te\u010Dn\u00ED reakce cementu s vodou doch\u00E1z\u00ED ke vzniku n\u011Bkolika v\u00FDznamn\u00FDch slou\u010Denin, kter\u00E9 maj\u00ED z\u00E1sadn\u00ED vliv na mechanick\u00E9 vlastnosti ztvrdl\u00E9ho betonu. Reakc\u00ED oxidu v\u00E1penat\u00E9ho s oxidem k\u0159emi\u010Dit\u00FDm a vodou vznik\u00E1 trikalcium a dikalcium silik\u00E1t. Jejichmo\u017Enost vzniku je v\u00FDznamn\u011B ovlivn\u011Bna reakc\u00ED hlinitanov\u00FDch slo\u017Eek a s\u00E1dry obsa\u017Een\u00E9 v cementu. Vznik ettringitu moderuje r\u016Fst krystalick\u00E9 struktury trikalcia a dikalcia silik\u00E1tu a t\u00EDm i dlouhodob\u00FD n\u00E1r\u016Fst pevnosti. Vznik monosulf\u00E1t\u016F z ettringitu je ovlivn\u011Bnjak mno\u017Estv\u00EDm s\u00EDran\u016F, tak mno\u017Estv\u00EDm vody. P\u0159i pou\u017Eit\u00ED rastrovac\u00EDho mikroskopu, kter\u00FD umo\u017E\u0148uje sledovat chemickou reakci za p\u0159\u00EDtomnosti vody, je mo\u017En\u00E9 sledovat jednotliv\u00E9 f\u00E1ze tuhnut\u00ED a vzniku betonu a z\u00E1rove\u0148 prov\u00E1d\u011Bt anal\u00FDzu jednotliv\u00FDch slo\u017Eek\"\"cementov\u00E9 pasty\"\". P\u0159i vznik\u00E1n\u00ED krystalick\u00E9 struktury betonu je mo\u017En\u00E9 sledovat zm\u011Bnu mechanick\u00FDch vlastnost\u00ED pomoc\u00ED zat\u011B\u017Eovac\u00EDch stroj\u016F a to i v popevnostn\u00ED \u010D\u00E1sti pracovn\u00EDho diagramu.\""@cs . . . "Experiment\u00E1ln\u00ED v\u00FDzkum mechanick\u00FDch vlastnost\u00ED \u010Derstv\u00E9ho betonu"@cs . . . "1"^^ . . "568"^^ . "Some basic compounds originate in first reaction between cement and water. This basic compounds have head influence on properties of hardened concrete. Tricalcium silicate and dicalcium silicate originate from reaction of silica with calcium oxide.Reaction between aluminium compounds and gypsum included in cement are mainly influenced originate of the tricalcium silicate and dicalcium silicate. Originate of ettringite moderate growing up structure of tricalcium and dicalcium silicate. Quantity ofwater and sulfates influence originate of monosulfates from ettringite. Observe of phases of setting and hardening of concrete and chemical reaction are possible with using scanning electron microscope (SEM). Analysis of compounds of cement paste ispossible with SEM too. Compress softening, mechanical properties are possible observe and measure by testing machines when crystalic structures originate."@en . "Neuvedeno."@en . . . "11"^^ . "Experimental Investigation of Mechanical Properties of Fresh and Young Concrete"@en . . . "734"^^ . . "11"^^ . "0"^^ .