Binder distribution model for asphalt mixtures based on packing of the primary structure
2015 (English)In: The international journal of pavement engineering, ISSN 1029-8436, Vol. 16, no 2, 144-156 p.Article in journal (Refereed) Published
Film thickness describes the coating around aggregate particles on asphalt mixtures. The standard method of calculating film thickness has proven to present several limitations, such as assuming an average thickness independent of particle size, being completely independent to the porosity of the mixture and considering only one mineral type. In this paper, a binder distribution model is developed for aggregates according to size and role in the structure. The aggregates are separated into two different structures: primary structure, the load bearing one, and secondary structure, smaller material that provides stability to the skeleton. A coating thickness for these two structures is calculated from a geometrical consideration that includes the packing arrangement of particles and the effect of overlapping as the film grows. The results were compared with known rutting performance of field mixtures and moisture conditioned laboratory mixtures, showing a good correlation between film thickness and resistance to failure.
Place, publisher, year, edition, pages
2015. Vol. 16, no 2, 144-156 p.
Asphalt mixture, Binder distribution, Film thickness, Primary Structure, Rutting, Moisture damage
IdentifiersURN: urn:nbn:se:kth:diva-98423DOI: 10.1080/10298436.2014.937713ISI: 000343298300004ScopusID: 2-s2.0-84908161232OAI: oai:DiVA.org:kth-98423DiVA: diva2:537209
QC 201411132012-06-262012-06-262014-11-13Bibliographically approved