Search results for "aeroporti"
showing 10 items of 387 documents
Performance improvements of asphalt mixtures by dry addition of polymeric additives
2017
This paper shows the results of an experimental study concerning the development and optimization of asphalt mixtures for binder and base courses, improved with specifically engineered additives. The focus was on the mechanical improvements of the mixtures as achievable via dry modification with polymeric additives by making use of aggregate and bitumen of average quality, as locally available, in order to limit the consumption of virgin materials. The results allowed interesting conclusions to be drawn about the use of polymeric additives for these mixtures. In particular, the modified mixtures proved to have better performance in terms of both permanent deformation resistance and stiffnes…
CONGLOMERATI AD ALTO MODULO (EME) MIGLIORATI CON ADDITIVI PLASTICI
2014
Fatigue resistance: is it possible having a unique response?
2012
The mechanical characterisation of the asphalt concrete in terms of both the fatigue resistance and the stiffness modulus is necessary to use any design method of the flexible road pavements. Different kinds of test are usually used in experimental work such as bending tests, uniaxial tests, etc., but sometimes they do not give the same answer. In this paper mechanical characterization was carried out by means of fatigue tests undertaken with two most used testing machines for asphalt material: two point bending (2PB) test at IFSTTAR in Nantes (France) and four point bending (4PB) test at University of Palermo, in Palermo (Italy). Different strain controlled tests were undertaken for the sa…
Mechanical and environmental performance comparisons of improved asphalt pavement wearing courses with high quality aggregates, steel slags, and poly…
2023
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…
Rolling resistance and traffic delay impact on a road pavement life cycle carbon footprint analysis
2017
The application of Life Cycle Assessment (LCA) to road pavements has been continuously evolving and improving over the last years, however there are several limitations and uncertainties in the introduction of some components in the framework, such as road pavement rolling resistance—in terms of pavement surface properties—and traffic delay during maintenance activities. This paper analyses the influence of methodological assumptions and the model used to estimate the increased emissions for traffic delay and road pavement rolling resistance on the results of an LCA. The Greenhouse Gases (GHG) emissions related to these two phases of a pavement LCA will be calculated for a UK case study, us…
Impianti ettometrici ed infrastrutture puntuali per i trasporti
2011
Gli argomenti contenuti nel volume, sviluppano alcune tematiche riguardanti le caratteristiche di offerta del trasporto urbano e dei sistemi puntuali quali porti, aeroporti e stazioni ferroviarie con particolare riguardo al loro dimensionamento anche dal punto di vista della congruità delle capacità operative in relazione al più complessivo sistema della mobilità. I terminali delle infrastrutture lineari di trasporto e gli impianti meccanizzati per la mobilità urbana, denominati a corto raggio od ettometrici, completano la panoramica delle soluzioni oggi disponibili per formulare proposte risolutive alle problematiche poste dalla congestione e dalle altre esternalità negative del sistema de…
Interpreting Life Cycle Assessment results of bio-asphalt pavements for more informed decision-making
2020
Due to emerging climate challenges, engineers are looking to replace the conventional asphalt pavements by utilizing bio-materials combined with Reclaimed Asphalt (RA). However, there is insufficient record in the literature assessing their environmental performance. This study addresses the analysis of the results obtained from a life cycle assessment exercise of asphalt pavements containing bio-materials and RA within their binder courses, developed within the BioRePavation project. The aim is to analyze the environmental benefits achieved, by means of hotspot mapping and sensitivity analysis of the most impactful factors of their lifecycles. Two alternatives are compared to a conventiona…
Forum Europeo sugli asfalti. A Parma l'EATA Conference 2010.
2010
VOL. 5 N. 1457 anni CXII- Notiziario della SIIV su Le Strade, Maggio 2010 (casa Ed. la fiaccola,Milano)-ISSN: 0373-2916, PAG. 172.
La cultura delle infrastrutture. Attivita' dell'associazione nel biennio 2008-2010
2010
Vol. 8-1460 - anno CIXII, p. 126, Notiziario della SIIV su Le Strade N.1454, Settembre 2010 (casa Ed. la fiaccola,Milano)-ISSN: 0373-2916.
Strade e aeroporti sotto controllo
2010
3 N. 1455 anno CXII. Notiziario SIIV su Le Strade. ISSN: 0373-2916. Marzo 2010, PAG. 142