Naslov
14 th IRF Road World Congress
(Polymer Modified Bitumen)

Autori
Rek, Vesna ; Barjaktarović, Zrinka ; Grgec, Zvonimir ; Marinić Nenad

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

Izvornik
14 th IRF Road World Congress Preliminary Program / M.W.Westerhuis; G.P. Shea - Pariz : The Ministry of Equipment, Transport and Housing, 2001

Skup
14 th IRF Road World Congress

Mjesto i datum
Pariz, Francuska, 11.06.2001. - 15.06.2001

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bitumen; Stiren/butadien/stiren blok kopolimer; Polimer bitumen; Dinamičko mehanička analiza; Morfološke karakteristike sastava faza; modul naprezanja; Temeljna krivulja
(Bitumen; Styrene/butadiene/styrene block copolymer; Polymer bitumen; Dynamic mechanical analysis; Morphological characteristics phase composition; Creep modulus; Master curves;)

Sažetak
The dynamic mechanical behaviour of bitumen (BIT)modifaed with styrene-butadiene-styrene bloc copolymer (SBS) were investigated. dynamic mechanical analysis (DMA) were performed in the temperature range -100 to 100 C. The primary viscoelastic function were determined at the traffic frecuency, 5 Hz. The BIT+SBS blends were investigated in creep fatigue regime at temperature 10,20,30,40 and 50 C.Dynamical mechanical behaviour of BIT+SBS blends depends on their morphological characteristics,number of phases, phase composition and phase content in blend, as well as time and temperature. The curves of primary viscoelastic functions, storage modulus (E'), loss modulus (E'') and loss tangent vs. Temperature of polymer modified bitumen differ from unmodified bitumen and indicata the presence of the swollen: bitumen phase, polybutadiene and polystyrene phases. The curve E' vs. temperature of polymer modified bitumen show the rubbery plateau. With the increament of SBS content the rubbery plateau is sifted to high temperature. At the constant load the creep values of BIT-SBS blends increase and those of creep modulus decrease over a period of time. This effect are more pronaunced in samples with higher content of SBS. The time-emperature correspodence principle was applied to create master curves for the reference temperature 10 C for the creep modulus of BIT+SBS blends. The data were analized using WLF and Arrhenius equations.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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