20.500.12556/RUL-84149 Vpliv kemijskih dodatkov na reološke lastnosti svežega betona diplomska naloga Influence of chemical admixtures on rheological properties of fresh concrete V okviru diplome smo izvajali raziskave na svežem betonu. Glavni namen raziskav je bil preučiti vpliv kemijskih dodatkov na reološke lastnosti sveže betonske mešanice. Meritve reoloških parametrov smo izvajali z reometrom ConTec Viscometer 5. Vzporedno smo izvajali tudi preiskave poseda in razleza svežega betona ter pri uporabi aeranta določili še delež zraka v betonu. Vse mešanice so bile sestavljene iz agregata, vode in cementa ter kemijskega dodatka. Kot kemijski dodatek smo uporabili superplastifikator, aerant in stabilizator. Uporabili smo tudi dve različni vrsti cementa. Dobljene rezultate smo analizirali ter opravili primerjave med strižno napetostjo na meji tečenja in plastično viskoznostjo ter posedom in razlezom svežega betona, v različnih časih po zamešanju betona. Within the thesis we carried out tests on fresh concrete mixtures. The main purpose of the tests was to examine the influence of chemical admixtures on rheological properties of fresh concrete. Measurement of rheological parameters was carried out with ConTec Viscometer 5 rheomether. In parallel, we also carried out slump test and flow table test on fresh mixtures and determined air content for mixtures with air-entraining agent. All concrete mixtures were composed of aggregate, water, cement and chemical admixture. As admixture, superplasticizer, air-entraining agent and stabilizer were used. We also used two different types of cement. The obtained results were analysed and comparison between shear yield stress and plastic viscosity, as well as slump and flow value were made in different times after mixing of fresh concrete. gradbeništvo diplomska naloga VSŠ sveža betonska mešanica reologija posed razlez plastična viskoznost strižna napetost na meji tečenja graduation thesis fresh concrete mixture rheology slump flow plastic viscosity shear yield stress true false false [B. Kresal] Slovenski jezik Angleški jezik Diplomsko delo 2016-07-12 02:59:47 2016-07-28 12:00:13 2022-12-16 13:25:10 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana XII, 59 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.012.4:691.3(497.4)(043.2) 7531873 GRV536_Kresal.pdf GRV536_Kresal.pdf 1 146BB502F011B7CE2C19BE33184FBEAE 2cacabcab4fb306dacbaa80faf5f43d1c9690f94b662eab42346396cbf60a544 e83a57be-a1b2-11eb-a523-00155dcfd717 20.500.12556/rul/9a7647b4-daaa-4d6a-85ce-2e4088ea190b https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=98090 Fakulteta za gradbeništvo in geodezijo 0 0 0