Roads and Bridges - Drogi i Mosty
21, 4, 2022, 277-292

Testing of asphalt mixtures containing an addition of reclaimed asphalt shingles

Piotr Zieliński Mail
https://orcid.org/0000-0002-3282-8430
Cracow University of Technology, Faculty of Civil Engineering, Chair of Highway and Traffic Enigneering, 24 Warszawska Str., 31-155 Cracow
Published: 2022-12-30

Abstract

The article presents test results of chosen properties of asphalt concrete mixtures with addition of asphalt shingle offcuts (reclaimed asphalt shingles, RAS). The presented research supplements previous works on the subject. Asphalt concrete AC 16 W 50/70 was adopted as the reference mixture. Results obtained for laboratory-produced mixture containing 4% RAS and plant-produced mixture containing 1% RAS were compared with the results of the reference mixture. Statistical analysis of void content in asphalt mixtures did not indicate significant differences; therefore, performance properties of mixtures may be compared without concern about the influence of physical properties. The research confirmed a significant increase in mixture stiffness with an increase in RAS content, especially at medium (15°C) and high (30°C) service temperatures. Compared to the reference mixture, mixtures incorporating RAS displayed an increase in indirect tensile strength as well. Lower temperature sensitivity of mixtures with RAS was also observed, both in terms of stiffness modulus and indirect tensile strength. Fatigue tests confirmed the positive effect of RAS on the obtained value of strain corresponding to fatigue life of 1 million load cycles.

Keywords


asphalt mixtures, elastic stiffness modulus, fatigue characteristics, fatigue life, indirect tensile strength (ITS), reclaimed asphalt shingles (RAS).

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References


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Testing of asphalt mixtures containing an addition of reclaimed asphalt shingles

  
Zieliński, Piotr. Testing of asphalt mixtures containing an addition of reclaimed asphalt shingles. Roads and Bridges - Drogi i Mosty, [S.l.], v. 21, n. 4, p. 277-292, dec. 2022. ISSN 2449-769X. Available at: <>. Date accessed: 02 Feb. 2023. doi:http://dx.doi.org/10.7409/rabdim.022.016.