Modification of asphalt mixtures for cold regions using microencapsulated phase change materials
Journal article, 2019

Phase change materials (PCMs) may be used to regulate the temperature of road surfaces to avoid low-temperature damages when asphalt materials become brittle and prone to cracking. With this in mind, different asphalt mixtures were modified with microencapsulated phase change materials (i.e. tetradecane) to assess their thermal benefits during the phase change process. Likewise, the effect on the mechanical performance of PCMs as a replacement of mineral filler was assessed. Special attention was paid to dry and wet modification processes for incorporating the PCMs into the mixtures. The results showed that PCM modifications are indeed able to slow down cooling and affect temperatures below zero. Approximately, a maximum of 2.5 °C offset was achieved under the tested cooling conditions compared to the unmodified reference specimens. Regarding the mechanical response at 0 °C and 10 °C, the results indicated that the PCM modification significantly reduces the stiffness of the material in comparison with the values obtained for the reference mixture.

Author

Moises Bueno

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Muhammad Rafiq Kakar

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Zakariaa Refaa

Chalmers, Architecture and Civil Engineering, Building Technology

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Jörg Worlitschek

Hochschule Luzern

Anastasia Stamatiou

Hochschule Luzern

Manfred N. Partl

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Scientific Reports

2045-2322 (ISSN)

Vol. 9 1 20342

Subject Categories

Manufacturing, Surface and Joining Technology

Other Materials Engineering

Composite Science and Engineering

DOI

10.1038/s41598-019-56808-x

More information

Latest update

2/12/2021