Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Study of the influence of the loading rate on the fracture behaviour of asphalt mixtures and asphalt mortars
Ist Teil von
Construction & building materials, 2020-11, Vol.262, p.120037, Article 120037
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
•We assessed the fracture properties of an asphalt mixture (HMA) and its mortar (FAM)•SCB tests were conducted at 6 different loading rates on both HMA and FAM.•A scan technique was used to compute the area of the cracked zone of both materials.•Cracked area and resistance to crack propagation were not dependent on loading rate.•Other fracture factors were loading-rate dependent and different between HMA and FAM.
Proper fracture characterization of Hot Mix Asphalt (HMA) is crucial to enhance the durability of pavement structures. This work evaluates the influence of the loading rate on the fracture behaviour of a typical dense-graded asphalt mixture and its correspondent mortar or Fine Asphalt Mixture (FAM). Semi-Circular Bending (SCB) tests were conducted under intermediate temperature (24 ± 1 °C), and six different loading rates (i.e., 0.1, 0.5, 5, 10, 25, 50 mm/min). The results show that neither the three-dimensional cracked surface area of the fracture zone of the FAM and HMA samples nor the resistance to crack propagation of the materials were loading rate-dependent, whereas its fracture energy, strength and stiffness were sensitive to this testing condition. Significant differences were also observed in the magnitudes of all cracking parameters within the full mixture and its mortar, as expected, except for the stiffness of the materials.