Assessment of gaseous emissions produced on site by bituminous mixtures containing crumb rubber

Crumb rubber (CR) derived from the grinding of end-of-life tires (ELTs) can be employed, either by means of the "wet" or of the "dry" process, in the production of high-performance bituminous mixtures for road paving applications. Nevertheless, when Administrations consider possible implementation of such technologies in pavement construction and rehabilitation, they are often concerned with the potential impact that the use of CR may have on environment and on workers operating at laying sites. This paper provides a specific contribution to this area of technical knowledge, focusing on the assessment of gaseous emissions which workers may be potentially exposed to in the framework of a sanitary-environmental risk analysis model which considers possible toxicological and carcinogenic effects.