Publication detail

The Stress Relaxation of Modified Bitumens

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

Original Title

The Stress Relaxation of Modified Bitumens

Type

conference paper

Language

English

Original Abstract

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.

Keywords

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

Authors

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

RIV year

2014

Released

26. 2. 2014

Publisher

Liverpool Centre for Materials Technology

Location

Liverpool

ISBN

978-0-9571804-4-4

Book

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

Edition

1

Edition number

13

Pages from

1

Pages to

14

Pages count

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"
}