0000000000614237
AUTHOR
Pellegrino O.
Mechanical and environmental performance comparisons of improved asphalt pavement wearing courses with high quality aggregates, steel slags, and polymeric compound
The use of waste materials in the construction of hot mix asphalt (HMA) pavements is an important opportunity for environmental sustainability. When properly designed, the alternative mixtures may also guarantee excellent mechanical performance. In this study, the results of an experimental analysis carried out on dense-graded HMAs are presented. In particular, the performance of a "traditional" surface mixture with limestone aggregate (designed with neat bitumen or a polymer-modified bitumen within the typical acceptance requirements for intended use in wearing courses) was compared with two alternative mixtures. The research investigated a surface mixture including coarse basaltic aggrega…
A methodology to identify critical road sections by means of cyclist's fatigue
This paper proposes a procedure for determining cyclists’ fatigue state along a specific road, as a function of some external variables related to the environmental context. When the physical fatigue reaches extreme levels, the cyclist’s ability to deal with an unexpected event or with an emergency condition is particularly limited; further, poor road pavement conditions may increase occurrence probability of critical events. In order to identify the potentially most dangerous road paths, the authors defined a methodology to build a model for cyclist’s fatigue evaluation in terms of Heart Rate class. The proposed procedure is based on the collection of simple data processed by means of Patt…