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

Stať ve sborníku v databázi WoS či 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. Resistance of bituminous mixtures to low temperature cracking can be evaluated by Thermal Stress Restrained Specimen Test (TSRST). 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 were determined in DSR at the temperature of 0 Celsius and -10 Celsius that were chosen based on the results of TSRST. The measurement procedure is described and 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. Resistance of bituminous mixtures to low temperature cracking can be evaluated by Thermal Stress Restrained Specimen Test (TSRST). 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 were determined in DSR at the temperature of 0 Celsius and -10 Celsius that were chosen based on the results of TSRST. The measurement procedure is described and 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

Stress relaxation, dynamic Shear Rheometer, bitumen, asphalt rubber, oxidative ageing, rheology, RTFOT, low temperature characteristics

Klíčová slova v angličtině

Stress relaxation, dynamic Shear Rheometer, bitumen, asphalt rubber, oxidative ageing, rheology, RTFOT, low temperature characteristics

Autoři

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

Vydáno

26.02.2014

Nakladatel

Liverpool Centre for Materials Technology

Místo

Liverpool

ISBN

978-0-9571804-4-4

Kniha

Proceeding of The 13th Annual International Conference on ASPHALT, PAVEMENT ENGINEERING AND INFRASTRUCTURE

Edice

1

Strany od

1

Strany do

14

Strany počet

14

BibTex

@inproceedings{BUT106039,
  author="Pavel {Coufalík} and Ondřej {Dašek} and Jiří {Kachtík} and Jan {Kudrna} and Svatopluk {Stoklásek}",
  title="The Stress Relaxation of Modified Bitumens",
  booktitle="Proceeding of The 13th Annual International Conference on ASPHALT, PAVEMENT ENGINEERING AND INFRASTRUCTURE",
  year="2014",
  series="1",
  number="13",
  pages="1--14",
  publisher="Liverpool Centre for Materials Technology",
  address="Liverpool",
  isbn="978-0-9571804-4-4"
}