Detail publikačního výsledku

The Stress Relaxation of Modified Bitumens

COUFALÍK, P.; DAŠEK, O.; KACHTÍK, J.; KUDRNA, J.; STOKLÁSEK, S.

Originální název

The Stress Relaxation of Modified Bitumens

Anglický název

The Stress Relaxation of Modified Bitumens

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

The Asphalt pavements in Central and Eastern Europe have to be resistant to high and very low temperatures and climatic changes. Especially emphasize influence of low temperatures seems to be critical parameter. That is why the modified bitumens with low temperature susceptibility and with high resistance to low temperature cracking are searched for. Dynamic Shear Rheometer (DSR) can be used as a quick method that can evaluate the modification system of bituminous binders. The advantage of DSR testing is also related to possibility of comparison of unaged and aged bitumen. The relaxations of shear stress of several asphalt rubber binders (containing 11 %, 13 %, 15 % and 17 % of crumb rubber) and paving bitumen were determined in DSR at the temperature of 0 degrees Celsius and -10 degrees Celsius. Relaxation tests were performed in the controlled strain regime. Total shear strain (rotation of upper geometry) was set to 1 % of the sample thickness and stress was applied for 60 s. Relaxation time was set to a period of 15 minutes. The shear stress relaxation behaviour of unaged bitumens and bitumens aged after 75 minutes and 225 minutes in Rolling Thin Film Oven Test (RTFOT) is presented and discussed.

Anglický abstrakt

The Asphalt pavements in Central and Eastern Europe have to be resistant to high and very low temperatures and climatic changes. Especially emphasize influence of low temperatures seems to be critical parameter. That is why the modified bitumens with low temperature susceptibility and with high resistance to low temperature cracking are searched for. Dynamic Shear Rheometer (DSR) can be used as a quick method that can evaluate the modification system of bituminous binders. The advantage of DSR testing is also related to possibility of comparison of unaged and aged bitumen. The relaxations of shear stress of several asphalt rubber binders (containing 11 %, 13 %, 15 % and 17 % of crumb rubber) and paving bitumen were determined in DSR at the temperature of 0 degrees Celsius and -10 degrees Celsius. Relaxation tests were performed in the controlled strain regime. Total shear strain (rotation of upper geometry) was set to 1 % of the sample thickness and stress was applied for 60 s. Relaxation time was set to a period of 15 minutes. The shear stress relaxation behaviour of unaged bitumens and bitumens aged after 75 minutes and 225 minutes in Rolling Thin Film Oven Test (RTFOT) is presented and discussed.

Klíčová slova

Rheological properties, Bituminous binder, Low Temperature Properties of Bituminous Mixtures, Binder ageing, Relaxation test

Klíčová slova v angličtině

Rheological properties, Bituminous binder, Low Temperature Properties of Bituminous Mixtures, Binder ageing, Relaxation test

Autoři

COUFALÍK, P.; DAŠEK, O.; KACHTÍK, J.; KUDRNA, J.; STOKLÁSEK, S.

Rok RIV

2016

Vydáno

01.05.2015

Nakladatel

De Gruyter

Místo

Berlin

ISSN

1464-8164

Periodikum

The International Journal of Pavement Engineering and Asphalt Technology (PEAT)

Svazek

16

Číslo

1

Stát

Spolková republika Německo

Strany od

66

Strany do

81

Strany počet

16

BibTex

@article{BUT114545,
  author="Pavel {Coufalík} and Ondřej {Dašek} and Jiří {Kachtík} and Jan {Kudrna} and Svatopluk {Stoklásek}",
  title="The Stress Relaxation of Modified Bitumens",
  journal="The International Journal of Pavement Engineering and Asphalt Technology (PEAT)",
  year="2015",
  volume="16",
  number="1",
  pages="66--81",
  doi="10.1515/ijpeat-2015-0004",
  issn="1464-8164"
}