Naslov
Polymer modified bitumen

Autori
Ocelić Bulatović, Vesna ; Rek, Vesna ; Jurkaš Marković, Kristina

Izvornik
Materials research innovations (1432-8917) 16 (2012), 1; 1-6

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
polymer modified bitumen ; rheological properties ; DSR ; SBS-L ; SBS-R ; thermooxidative degradation

Sažetak
Standard methods of characterization of bitumen, BIT, and of polymer modified bitumen, PmBs, do not provide sufficient information. We propose to rely on determination of rheological properties which are much more informative. Along theses lines, we have determined rheology before and after the Rolling Thin Film Oven Test, RTFOT. The materials studied were BIT, BIT + linear, L, styrene-butadiene-styrene, SBS, block copolymer, and BIT + radial, R, SBS copolymer. The rheological properties of the modified binders are characterized using dynamic shear rheometer, DSR, over wide ranges of temperatures at a fixed traffic frequency of 10 rad/s. SBS block copolymers increase the elasticity of the bitumen at hight temperatures and contribute to a better flexibility at low temperatures. PmBs have higher resistance to permanent deformation. After ageing, the hardening of BIT and PmBs occurred and the elastic response decreases as a consequence of degradation. The determined rheological properties are in agreement with the results of conventional tests.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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