20.500.12556/RUL-72592 Agregat iz elektrofiltrskega pepela pridobljen po postopku hladnega utrjevanja diplomska naloga Fly ash aggregate developed by means of cold-bonding V sklopu diplomske naloge smo razvili agregat iz elektrofiltrskega pepela po postopku hladnega utrjevanja z vlivanjem. Elektrofiltrski pepel smo pred uporabo analizirali glede kemijske in mineraloške sestave, izrisali smo njegovo sejalno krivuljo ter preverili njegov indeks aktivnosti. Kot vezivo smo uporabili portland cement v naslednjih deležih: 10 %, 20 % in 30 %. Maso smo vlivali v standardne kalupe dimenzij 160 x 40 x 40 mm ter vzorce negovali na stalni vlagi. Tako dobljene prizme smo testirali na tlak in upogib ter jih podrobili na želene frakcije. Z enakim EFP smo naredili primerjalni agregat po postopku hladnega utrjevanja z granuliranjem. Ker smo iz preiskav trdnosti prizem ugotovili, da dosežemo zadostne trdnosti že z 10 % cementnega veziva, smo pri izdelavi granuliranega agregata uporabili le ta delež. Po formiranju granul na vrtečem bobnu in po njihovem 28 dnevnem negovanju na stalni vlagi, smo na granulah izvedli test tlačne trdnosti. Izvedli smo še dodatne raziskave agregatov. S SEM mikroskopom smo si ogledali strukturo agregatov. S Hgporozimetrom smo določili gostoto in poroznost agregata ter porazdelitev por v vzorcih. Nato smo preverili še vpojnost agregata in dobljene rezultate primerjali med seboj. Na koncu smo za oceno obnašanja agregatov v praksi uporabili agregate v betonski mešanici in dobljene trdnosti in gostote tako pripravljenih betonov primerjali z betonom iz naravnega apnenčevega agregata. This graduation thesis is concerned with the development of a fly ash based aggregate by means of the cold-bonding process, by casting and then crushing into individual fractions. Three different proportions of Portland cement, i.e. 10%, 20%, and 30%, were used in the mixture as a binder. Prior to use, the chemical and mineral characteristics of the fly ash were determined, as well as the corresponding loss of ignition. The comparative aggregate was developed by means of the cold bonding pelletization process. Based on the results of tests of the tensile and compressive strengths of the crushed aggregate, a cement ratio of 10 % was used in this process. Density, water adsorption capacity, and porosity, as well as tensile and compressive strengths, were determined for the produced aggregates after aging them at constant humidity. SEM investigations were also performed, and the results obtained in the case of both produced aggregates were compared. In order to assess performance of the aggregates in practice, both of them were used in concrete, and the results of tensile and compressive strength tests were compared with those achieved in the case when the concrete was made using limestone aggregate. gradbeništvo diplomska naloga VSŠ elektrofiltrski pepel lahki agregat lahki beton postopek hladnega utrjevanja fly ash lightweight aggregate lightweight concrete coldbonding true false false [A. Frankovič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2015-09-29 05:10:34 2015-09-29 05:10:34 2022-12-16 11:47:56 0000-00-00 00:00:00 2015 0 Ljubljana 2015 Ljubljana XVIII, 60 str., 3 pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 7205729 BOG089_Frankovic.pdf BOG089_Frankovic.pdf 1 E174BD3AF68FCF3E47AE7B6E0036D2E9 c695b9340d432529cf04dc49affe88697799d9d91879899da43d7c96689dce97 34e94fe8-a1ae-11eb-a523-00155dcfd717 20.500.12556/rul/b343cd5b-989d-45ad-b801-1ff9abd07085 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=86192 Fakulteta za gradbeništvo in geodezijo 0 0 0