Naslov
CREEP&RECOVERY-POLYMER MODIFIED BITUMEN

Autori
Ocelić Bulatović, Vesna ; Rek, Vesna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
23. Hrvatski skup kemičara i kemijskih inženjera ; Knjiga sažetaka / Hadžiev Andrea ; Blažeković, Zdenko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2013, 216-216

ISBN
978-953-6894-50-5

Skup
23. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Osijek, Hrvatska, 21.04.2013. - 24.04.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Polymer modified bitumen; RTFOT; Creep&Recovery; Rutting;
(Polymer modified bitumen; RTFOT; Creep&Recovery; Rutting)

Sažetak
Rutting, defined as accumulated permanent deformation, is a common form of distress in asphalt pavements. Rutting failure leads to poor serviceability of the pavements, making vehicles ride rough and unsafe. The increasing demands of traffic on road building materials in recent years has led to the evaluation, development and use of a wide range of bitumen modifiers (PmBs) which enhance the performance of the basic bitumen and hence the asphalt on the road. Polymers are playing and increasingly important role in the asphalt industry. Polymer modification of bitumens is not a new phenomenon, but interest of this technique has increased considerably due to the increased performance-related requirements on asphalt pavements. To achieve the goal of improving bitumen properties, a selected polymer should create a secondary network [1] or new balance system within asphalt binders by molecular interactions [2] or by reacting chemically with the binder [3]. In this paper, the following polymers are used as bitumen modifiers: styrene –butadiene-styrene block copolymers, linear and radial structure (SBS-L, SBS-R), plastomer ethylene- vinyl acetate (EVA) and reactive polymer ethylene butylacrylate glycidylmethacrylate (EGA). The binders were subjected to primary aging, using the Rolling Thin Film Oven Test (RTFOT). The aging of the binders in the RTFO test represent the aging that happens during the mixing and compaction of asphalt mixture samples. Test method multiple stress creep and recovery (MSCR) are used to characterized the binder deformation, with Dynamic Shear Rheometer (DSR). The tests use 1s creep loading followed by 9s recovery for the stress level of 0.1 kPa and 3.2 kPa. Ten cycles are run for each stress level for a total of 20 cycle. Results show that polymers elasticity has enormous effect on bitumen rut resistance behaviour. PmBs with higher elasticity show less non-recoverable deformation. As the elasticity of the binders in increasing, the PmB recover more amount of deformation and result in less amount of permanent deformation. The effectiveness regarding the rutting resistance of investigated polymers as a PmBs may be ranked as SBS-R> EGA> SBS-L>EVA. [1] V.O. Bulatović, V. Rek and K. J. Marković, Mater. Res. Innov., 16 (2012) 1-6. [2] V.O. Bulatović, V. Rek and K. J. Marković, Polym. Eng. Sci. (2012), accepted. [3] V.O. Bulatović, V. Rek and K. J. Marković, Mater. Res. Innov., (2013) DOI: 10.1179/1433075X12Y.0000000059.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA