20.500.12556/DiRROS-18283 Quality checking of polymer modified bitumens in Slovenia For many years the properties of bitumen have been determined based on mechanical tests as needle penetration, Ring&Ball and Fraass fracture temperature. For elastomer (styrene-butadiene-styrene) polymer modified bitumens these tests are not sufficient to show the important differences in bitumens. Elastic recovery and cohesion provide better insight, but rheological properties cannot be adequately described with conventional test. The requirements of the polymer modified bitumens (PmB) in Europe were defined in EN14023 in 2010 [1]. Since then several new tests were introduced in the research field and their procedures improved. In the European Standards Committee (CEN) TC 336, there is on-going work to develop performance related specifications. New laboratory test methods from American standards were adapted and transformed into EN standards (bitumen laboratory aging methods and rheological tests). These test methods are not yet employed in the cur-rent PmB European standard, however, the draft prEN 14023, April 2020 [2] suggests these new tests. In the recent years at ZAG Laboratory for asphalts and bitumen-based products long-term aging of bitumen by pressure aging vessel (PAV) and rheological tests were introduced. Traditional bitumen test methods are performed together with new rheological testse.g. Dynamic Shear Rheometer (DSR) testing, to characterize complex modulus and phase angle, and Multiple Stress Creep Recovery Test (MSCRT) in order to develop a preliminary data base on PmB’s, which are frequently used in Slovenia. The paper presents the current requirements for PmB’s in Slovenia and test results on PmB 45/80-65, original, laboratory aged and extracted from produced asphalt mixtures. polymer modified bitumen recovered bitumen laboratory ageing dynamic shear rheometer multiple stress creep recovery test materiali bitumni polimeri kakovost preizkušanje true false true Department of Transportation, Faculty of Civil Engineering, University of Zagreb Angleški jezik Slovenski jezik In copyright / Zaštićeno autorskim pravom Neznano 2024-02-28 12:31:45 2024-02-28 14:05:27 2024-02-29 03:40:18 0000-00-00 00:00:00 2021 0 0 Str. 1013-1019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-05-06 656 90582531 79277571 https://repozitorij.grad.unizg.hr/islandora/object/grad:713 1 91e756fc-d624-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24832 RAZ_Tusar_Marjan_2021.pdf RAZ_Tusar_Marjan_2021.pdf 1 A551F4EC73B88B607EFC934F367A9184 b4923d3e7e396d2048b4ae63cd706a434f43881f4e9fdc0f3fc2e41d383feb73 85e7ca37-d631-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24846 https://doi.org/10.5592/CO/cetra.2020.1086 0 810d7562-d631-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24845 Zavod za gradbeništvo Slovenije 0 0 0