Effect of bio-oil on rheological and calorimetric properties of RTFOT aged bituminous compositions

• Published in: International journal of pavement research & technology Vol. 14; no. 5; pp. 537 - 542
• Main Authors: Ābele, A., Merijs-Meri, R., Bērziņa, R., Zicāns, J., Haritonovs, V., Ivanova, T.
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.09.2021; Springer Nature B.V
• Subjects: Biodiesel fuels; Bitumens; Building Construction and Design; Butadiene; Civil Engineering; Composition; Copolymers; Engineering; Fatigue strength; Fourier transforms; FTIR spectrometers; Infrared spectrometers; Low temperature; Oxidation; Polymers; Properties (attributes); Rapeseed; Rapeseed oil; Rheological properties; Rheology; Structural Materials; Thin films; Modification of RTFOT bitumen; Elastomer; Bio-oil; Structural; Rheological properties
• ISSN: 1996-6814; 1997-1400
• DOI: 10.1007/s42947-020-0051-y

In the current research rejuvenation of aged bitumen by the oxidation product of rapeseed oil biodiesel (F) is considered thu s contributing to the solution of global warming. Aging of bitumen was performed by rolling thin film oven test (RTFOT). In the first stage RTFOT bitumen was modified with F at various weight contents (2, 5, 10 wt. %). Subsequently, 2 wt. % of F was introduced into different modified bituminous compositions with total polymer content of 3 wt. %. In comparison to the traditionally used styrene-butadiene copolymer (SBS), ethylene-octene copolymer with α-octene group content of 38% (EOC) were applied as F rejuvenated RTFOT modifiers. Structure as well as rheological properties of thus modified bituminous systems were characterised using dynamic shear rheometer (DSR), Fourier-transform infrared spectrometer (FTIR), and temperature-modulated differential scanning calorimeter (MDSC). It has been demonstrated that F rejuvenated polymer modified RTFOT demonstrates improved low-temperature properties, as well as increased rutting resistance and fatigue resistance.