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Application of synthetic wax for improvement of foamed bitumen parameters
Ist Teil von
Construction & building materials, 2015-05, Vol.83, p.62-69
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2015
Quelle
Access via ScienceDirect (Elsevier)
Beschreibungen/Notizen
•We evaluated a foamed 50/70 pen bitumen modified with Fischer–Tropsch wax.•The additive reduced the dynamic viscosity of the binder above 100°C.•The foam expansion ratio increased linearly with additive dosage.•The foam half-life increased linearly with additive dosage.•The foam index increased with the increase of FT wax concentration.
The aim of the research was to evaluate the properties of foamed bitumen, produced from a Fischer–Tropsch synthetic wax modified 50/70 penetration grade bitumen for use as a binder in road construction layers. The binders were subjected to conventional tests (including penetration, softening point, Fraass breaking point and dynamic viscosity) as well as bitumen-foam-specific testing (including expansion ratio, half-life and foam index at different foaming water contents). Optimum amounts of foaming water and Fischer–Tropsch wax were identified and the binders were classified as relevant for different low-energy bitumen mix production techniques.