20.500.12556/RUL-162639 Vpliv superabsorpcijskega polimera na velikost zgodnjega avtogenega krčenja betona visoke trdnosti diplomska naloga The influence of superabsorbent polymer on the magnitude of early autogenous shrinkage in high-strength concrete graduation thesis Avtogeno krčenje betonov je posledica samoizsuševanja v porah cementnega kamna in lahko vodi v nastanek mikro razpok. Veliko bolj problematično je pri betonih visoke trdnosti zaradi njihovega nizkega vodovezivnega razmerja. Za preprečitev poškodb je smiselno beton notranje negovati z vnosom dodatne vode v obliki notranjih rezervoarjev. V diplomski nalogi smo predstavili superabsorpcijske polimere, opisali njihove značilnosti in raziskovali njihovo učinkovitost v vlogi notranjih rezervoarjev vode. Izvedena je bila eksperimentalna raziskava, v kateri smo betonski mešanici dodali predhodno namočen superabsorpcijski polimer. Z merilnimi napravami smo merili avtogeno krčenje in rezultate primerjali s primerjalno mešanico betona v štirih časovnih intervalih. Ugotovili smo, da vključitev superabsorpcijskega polimera v betone visoke trdnosti ugodno vpliva na velikost zgodnjega avtogenega krčenja. Autogenous shrinkage of concrete is a result of self-desiccation in the pores of cement paste and can lead to the formation of microcracks. It is much more problematic in high-strength concrete due to its low water-to-binder ratio. To prevent damage, the concrete must be internally cured by introducing additional water in the form of internal reservoirs. In this thesis, we presented superabsorbent polymers, described their characteristics, and investigated their effectiveness as internal water reservoirs. An experimental study was conducted in which pre-soaked superabsorbent polymer was added to the concrete mix. Autogenous shrinkage was measured using measuring devices, and the results were compared with a control concrete mix in the first 24 hours and after three, seven, and twelve days following casting. We found that the inclusion of superabsorbent polymer in high-strength concrete has a favorable effect on reducing the magnitude of early autogenous shrinkage. diplomske naloge gradbeništvo betoni visoke trdnosti superabsorpcijski polimer zgodnje avtogeno krčenje notranja nega notranji rezervoar graduation thesis civil engineering high-strength concrete superabsorbent polymer early autogenous shrinkage internal curing internal reservoir true false false [A. Kolenc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-09-26 07:46:37 2024-09-26 07:46:39 2025-08-08 13:42:50 0000-00-00 00:00:00 2024 0 Ljubljana 2024 Ljubljana 1 spletni vir (1 datoteka PDF (IX, 29 str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.012.4(043.2) 165343 209289219 16577.pdf 16577.pdf 1 EB00078309CCA01A2985590A6E8B4574 978044599c52a69cd8753222c032e86df1a9a03ccf333c856689a30568a6025e 95453153-7bca-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=192044 Fakulteta za gradbeništvo in geodezijo 0 0 0