20.500.12556/DKUM-61149 OVREDNOTENJE ENERGIJE RAZTEGOVANJA PmB BITUMNA NA RAZLIČNIH DOLŽINAH RAZTEGA DETERMENING THE EXTENSION ENERGY OF PmB BITUMEN AT VARIOUS EXTENSION LENGHTS Tema diplomskega dela je ovrednotenje standardizirane metode določanja sile pri merjenju duktilnosti po standardu EN 13589. Novembra 2014 je izšel nov predlog standarda EN 13589, na katerega smo članice CEN še lahko podale pripombe. Od aprila 2016 je na voljo končni predlog noveliranega standarda. V predlogu standarda se navaja, da mora biti raztezek najmanj 1333% glede na dimenzije vzorca pred preiskavo to je 30 mm, kar se doseže pri raztezku 400 mm (D[%] = (400 mm/30 mm)×100). Med preiskavo se meri sila in raztezek ter se računa energija. Po preiskavi se odčita porabljeno energijo raztezanja do 200 mm (E'0,2) in energijo raztezanja do 400 mm (E'0,4). Končni rezultat preiskave je razlika med odčitanima energijama E's= E'0,4- E'0,2 oziroma E*0,2-0,4. Glavni cilj dela je ovrednotenje, če je energija E's določena po predlogu standarda v korelaciji z rezultati drugih standardnih preiskav bitumna, kot so zmehčišče po prstan kroglica, penetracija, pretrgališče po Fraassu, indeks penetracije in elastična povratna deformacija. Pri tem sem dodatno ovrednotila, kakšne korelacije dobimo, če se odčita porabljeno energijo pri dolžinah raztezanja, ki so drugačne kot so predpisane v predlogu standarda. Na primer odčitamo porabljeno energijo raztezanja do 0,1 m (E'0,1) in energijo raztezanja do 0,3 m (E'0,3) ter dobimo razliko med odčitanima energijama E′0,1-0,3=E'0,3-E'0,1. Spodnjo mejo sem spreminjala z manjšanjem spodnjega intervala odčitanega raztezanja, kar pomeni da bomo namesto 0,2 m odčitali 0,1 m in 0,05 m. Zgornjo mejo sem spreminjala s sistematičnim odčitavanjem različnih odsekov dolžine 0,2 m. Poleg odseka od 0,2 m do 0,4 m sem odčitala odseke 0,25 m do 0,45 m, 0,3 m do 0,5 m, 0,35 m do 0,55 m in tako naprej. Zahteve za vrednosti E's oziroma E′0,2-0,4 določata krovni standard SIST 1035:2008 in standard SIST EN 14023:2010. Pri tem so navedene različne temperature preskušanja: 5°C, 10°C in 25°C. Z diplomskim delom želim tudi preveriti, če so predpisane zahteve realne za vse polimerne bitumne tipa PmB 45/80-65, ki se uporablja v Sloveniji. The topic of the work is the evaluation of the standardized method of determining force in the measurement of ductility according to the standard EN 13589. In November 2014 a new draft standard, EN 13589, was issued, upon which members of CEN couldn still gave comments and propose corrections. In April 2016 the final draft was issued. In the draft standard it is stated that there should be an elongation of at least 1333% compared to the dimensions of the sample prior to the investigation. The sample has a length of 30 mm, so that such an elongation is achieved at an elongated length of of 400 mm (D[%] = (400 mm/30 mm)×100). During the investigation, the force and elongation are recorded, and the deformation energy is calculated. The main results of the investigation are the readings of the energy supplied by the sample up to an elongation of 0.2 m (E'0,2) and the corresponding energy consumed up to an elongation of 0.4 m (E'0,4). The final result of the investigation is the difference between the readings of the measured energy, i.e. E's = E'0,4- E'0,2 = E*0,2-0,4. The main objective of the work was to investigate whether the energy E's, as defined according to the draft standard, is in correlatio with the results of other standard tests used for the investigations of the properties of bitumen, i.e. the ring and ball softening point, penetration, Fraass breaking point, penetration index, and elastic recovery tests. Estimates of the achieved correlation were also performed in the case when the elongation lengths where the consumed energy is recorded are different from those defined in the draft standard. For example, if the consumed energy is are read at an elongation up to 0.1 m (E'0,1) and at an elongation up to 0.3 m (E′0,3), the obtained result is the difference between the energies of the readings: E′0,1-0,3=E'0,3-E'0,1. The lower limit was first varied, by decreasing the reading interval to a smaller elongation, i.e. instead of using an elongation at 0.2 m, readings of the consumed energy were performed at elongations of 0.1 m and 0.05 m. The upper limit was changed using systematically defined readings along different sections of length 200 mm. In addition to the section from 0.2 m to 0.4 m, the sections from 0.2 m to 0.45 m, 0.3 m to 0.5 m, 0.35 m to 0.55 m, and so on, were used. The required values of E's and E′0,2-0,4 are given in the standards SIST 1035:2008 and SIST EN 14023:2010. Three different test temperatures are used 5°C, 10°C and 25°C. In the work it was also investigated whether the requirements in these standards are applicable to all polymer bitumen types PmB 45/80-65, i.e. those which are commonly used in Slovenia. bitumen duktilnost energija raztegovanje sila bitumen ductility energy elongation force true true false [D. Bohinc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2016-07-25 09:03:40 2016-09-05 18:55:40 2022-06-25 03:07:57 2019-07-11 12:10:46 2016 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.172.2:667.621.3(043.2) 20306454 URN:SI:UM:DK:FOGT6KKG VS_Bohinc_Dusanka_2016.pdf VS_Bohinc_Dusanka_2016.pdf 1 418A97C9A99AE4D3E092FA7B3CAC1135 e69fc3df8cb25d6aa7adb271256f47f16fb236bfa59aeb8c0a140cdd0dd9719b 00dde83b-7c0d-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=98343 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0