Ozonation of Asphalt Flux

Natural weathering of styrene–butadiene modified bitumen

“…FTiR is a most important method to identify and quantify polymers in sealants (Choquet and ista, 1990;Masson et al, 2001) and it has long been used to study bitumen oxidation (Campbell and Wright, 1964). The basics of the method can be found in several textbooks (lambert et al, 1976;Pavia et al, 1979).…”

“…There are many infrared spectroscopy studies of bitumen oxidation (Campbell and Wright, 1964;Jemison et al, 1992;Herrington et al, 1994;Herrington and Ball, 1996) including polymer-modified bitumen (Ruan et al, 2003). in most cases, accelerated laboratory methods of oxidation are used.…”

Photooxidation of asphalts in the presence of ozone

“…Campbell and Wright have reported previously [8] that FeCl3 appeared to act as a photosensitizer when FeOl3-catalyzed asphalt was irradiated (carbon arc) in air. A direct comparison was made in the present work between asphalts 3 and 3X in ozoneoxygen to 6.0 hI' solar irradiation.…”

“…Since this cataly t produced some unusual effects in the asphalt hardenin g process (necessary to make a coating-grade asphalt) [8), it was included in the present work to elucidate any effects on the photooxidation process with ozone. In order to separate the effects of catalyst and source, some experiments were made with asphalt No.…”