Asphalt mixture and its time delay of stress after strain at change of temperature and frequency

• Published in: Selected scientific papers Vol. 16; no. 2; pp. 133 - 140
• Main Authors: Mandula, Ján, Bokomlaško, Jakub
• Format: Journal Article
• Language: English
• Published: Sciendo 01-12-2021
• Subjects: asphalt mixture; frequency; load; stress; time
• ISSN: 1338-7278; 1338-7278
• DOI: 10.2478/sspjce-2021-0021

Materials in pavement construction are used due to their material properties. Asphalt mixtures, which are today most used during building pavement construction, have a significant place. Asphalt mixtures are classified as viscoelastic materials due to their material properties. This article focuses on the time delay of the stress behind the strain, which is a specific property for viscoelastic materials. It is particularly focused on one type of asphalt mixture, which is used in the binder course and in the upper base layer. The selected asphalt mixture was tested on a four-bending machine and the samples had a beam shape. The sample was tested at four temperatures and seven frequencies. In the discussion, the article focuses on the comparison of the time delay of the stress Δt behind the strain during the change of temperature and frequency. It is clear from the results that the selected asphalt mixture is significantly affected by the change in temperature as well as the change in frequency. The conclusion is devoted to a summary of the acquired knowledge and observation, which is focused on examples in practice.