VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Rheological characterization and comparison of aged polymer modified bitumens [Elektronski vir]
    Ravnikar Turk, Mojca ; Tušar, Marjan ; Ržek, Lidija
    Investigations of low temperature and fatigue cracking in asphalt pavements are a priority in asphalt laboratories. Asphalt resistance to cracking depends mainly on the bitumen characteristics. The ... development of cracks can be indirectly predicted with the knowledge about bitumen properties, especially after aging. Contractors must ensure the required quality of produced asphalt mixes. To fulfil this obligation the characteristics of bitumens delivered to asphalt plants should be monitored. Investigations of such laboratory aged bitumens allow for their characterization and comparison between aged and non-aged bitumen. For many years the properties of bitumen at low temperatures have been determined based on the Fraass fracture temperatures. Since the Fraass breaking point test has several shortcomings, additional parameters like stiffness and creep rate were introduced in the Bending Beam Rheometer (BBR) method, which has been standardized, but it is still not widely used. Several samples of polymer modified bitumen PmB 45/80-65, which is widely used in our climate region, were extensively tested. The purpose of the study was to determine the impact of aging on bitumens. On neat bitumen the usual scope of bitumen tests (R&B, Penetration, Fraass) and BBR and DSR tests were performed. All tests were subsequently repeated on short term aged (RTFOT method) bitumens. In the last step the bitumens have been laboratory aged with RTFOT and PAV method and then re-tested. In the paper, the sensitivity to laboratory aging for samples of PmB 45/80-65, produced by different manufacturers, is presented.
    Vir: Proceedings of the 7th Eurasphalt & Eurobitume Congress v1.1, 15th-17th June 2021, virtual [Elektronski vir] (Str. 1-7)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2021
    Jezik - angleški
    COBISS.SI-ID - 61434115

    Povezava(-e):

    https://proceedings.eecongress2021.org/ps/welcome.html#/papers/pdfView/pdf/72_paper_con_abstract.pdf

    Odprti dostop



Vnos na polico