The utilization of sulfur in bituminous binders started many years ago: a number of roads were paved in U.S. with SA (sulfur-asphalt) mixtures. Literature reports that, when mixing sulfur and asphalt, H2S evolution starts at temperatures higher than 150°C. By using thermal analysis techniques, the present paper shows that H2S evolution begins at about 130°C for most types of bitumens. Kinetics of reaction between sulfur and visbreaker bitumens were also studied: the reaction order with respect to sulfur is equal to 0.5 for the three visbreaker bitumens considered in this work.
Reaction of visbreaker bitumens with sulfur / DE FILIPPIS, Paolo; Giavarini, Carlo; Santarelli, Maria Laura. - In: PETROLEUM SCIENCE AND TECHNOLOGY. - ISSN 1091-6466. - STAMPA. - 15:7-8(1997), pp. 743-753. [10.1080/10916469708949686]
Reaction of visbreaker bitumens with sulfur
DE FILIPPIS, Paolo;GIAVARINI, Carlo;SANTARELLI, Maria Laura
1997
Abstract
The utilization of sulfur in bituminous binders started many years ago: a number of roads were paved in U.S. with SA (sulfur-asphalt) mixtures. Literature reports that, when mixing sulfur and asphalt, H2S evolution starts at temperatures higher than 150°C. By using thermal analysis techniques, the present paper shows that H2S evolution begins at about 130°C for most types of bitumens. Kinetics of reaction between sulfur and visbreaker bitumens were also studied: the reaction order with respect to sulfur is equal to 0.5 for the three visbreaker bitumens considered in this work.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
