Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
M. Dimitrov, B. Hofko:
"New Method For Temperature Reduction Of Mastic Asphalt With Environmental And Technological Benefits";
Poster: International Society for Asphalt Pavements, ISAP 2018,
- 21.06.2018; in: "International Society for Asphalt Pavements",
Mastic asphalt (MA) mixes are usually produced at high temperatures (230°C to 250°C) to decrease the viscosity of the bituminous mastic and thus produce a flowable, self-compacting mixture. A lower production temperature has the potential to decrease cost and energy demand, as well as health-relevant emissions of particulate matter throughout the life cycle. The state-of-the-art method for temperature reduction is wax modification of the bituminous binder to reduce its viscosity. In a recently finished study, alternative ways for temperature reduction of MA were developed and thoroughly analysed by means of mechanical testing, emission and life-cycle analysis. A reference MA according to European Standards is compared to temperature reduced MAs: a state-of-the-art reduction by modification with wax and an alternative method by substituting crushed by round aggregates. A temperature reduction of 30 K can be realized for both methods, mechanical performance of both mixes is equal. In addition, a combination of wax modification and round aggregates was investigated. An even higher temperature reduction of 50 K is possible, low-temperature behaviour is equal and resistance to permanent deformation significantly better than the reference mix. In addition, a drastic reduction in emissions during production can be observed when the temperature is reduced by 30 K and 50 K, respectively.
mastic asphalt,temperature reduction,performance based testing,emissions,life cycle analysis
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.