Wet skid-resistance is of paramount importance for road safety as it has been recognized to affect wet-road accidents. Pavement skid resistance is primarily a function of the surface texture (both micro-texture and macro-texture) which deteriorates during the pavement life. It is a known fact to road asset managers, that short and long term planning and prioritizing of periodic maintenance and rehabilitation programs require the use of accurate deterioration models. Many researchers developed methods to predict the evolution of asphalt pavement skid resistance based on aggregate texture before and after polishing, gradation of asphalt mixture, and traffic levels, but very few studies investigated the impact of type and travel mode of traffic vehicles. In this paper, a relationship between experimentally measured contact friction energy and pavement wear is derived for a specific bituminous surface course. Test equipment and methods for measurements of variable slip skid resistance on outdoor surface courses are described and employed to perform a full-scale accelerated pavement wear test. A reasonable correlation is derived between cumulated frictional dissipated energy in the tire footprint area and deterioration of pavement skid resistance and texture. Preliminary results seem encouraging and it is believed that a refined description of the effect of traffic may help in improving accuracy of skid resistance generalized deterioration models.
A CORRELATION BETWEEN BRAKING TIRE CONTACT FRICTION ENERGY AND PAVEMENT SKID DETERIORATION
Mauro D'Apuzzo
;Azzurra Evangelisti
;
2019-01-01
Abstract
Wet skid-resistance is of paramount importance for road safety as it has been recognized to affect wet-road accidents. Pavement skid resistance is primarily a function of the surface texture (both micro-texture and macro-texture) which deteriorates during the pavement life. It is a known fact to road asset managers, that short and long term planning and prioritizing of periodic maintenance and rehabilitation programs require the use of accurate deterioration models. Many researchers developed methods to predict the evolution of asphalt pavement skid resistance based on aggregate texture before and after polishing, gradation of asphalt mixture, and traffic levels, but very few studies investigated the impact of type and travel mode of traffic vehicles. In this paper, a relationship between experimentally measured contact friction energy and pavement wear is derived for a specific bituminous surface course. Test equipment and methods for measurements of variable slip skid resistance on outdoor surface courses are described and employed to perform a full-scale accelerated pavement wear test. A reasonable correlation is derived between cumulated frictional dissipated energy in the tire footprint area and deterioration of pavement skid resistance and texture. Preliminary results seem encouraging and it is believed that a refined description of the effect of traffic may help in improving accuracy of skid resistance generalized deterioration models.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
