Influence of anti-ageing compounds on rheological properties of bitumen

JOURNAL OF CLEANER PRODUCTION

卷:318

Article

Gao, Yangming^1,2  Zhang, Yuqing³  Omairey, Eman L.³  Al-Malaika, Sahar¹  Sheena, Husam¹ 

[1] Aston Univ, Dept Chem Engn & Appl Chem CEAC, Polymer Proc & Performance PPP Res Unit, Aston Triangle, Birmingham B4 7ET, England

[2] Delft Univ Technol, Fac Civil Engn & Geosci, Sect Pavement Engn, Stevinweg 1, NL-2628 CN Delft, Netherlands

[3] Aston Univ, Dept Civil Engn, Aston Triangle, Birmingham B4 7ET, England

关键词: Bitumen;    Anti-ageing compounds;    Rheological properties;    Fatigue cracking;    Rutting resistance;   

DOI  :  10.1016/j.jclepro.2021.128559

来源: Elsevier

【 摘 要 】

The aim of this study was to investigate the effects of different anti-ageing compounds (AACs) on the oxidative stability, rheological and mechanical properties of bitumen. Modified bitumen samples containing six different AAC combinations, with five samples containing Irganox acid (3,5-di-tert-butyl-4-hydoxyphenylpropionic acid), a hindered phenol polymer-based antioxidant, were fabricated and aged under different conditions using a Rolling Thin Film Oven (RTFO) as well as a Pressure Aging Vessel (PAV). The oxidative stabilising performance (anti-ageing) of the AACs was examined using Fourier Transform Infrared (FTIR) Spectroscopy. The effect of the AAC-modified bitumen on different rheological and mechanical properties was investigated -complex viscosity, linear viscoelastic (LVE) properties, fatigue and rutting -using a Dynamic Shear Rheometer (DSR). The results illustrated that all the AAC-combinations examined afforded good oxidative stability to the base bitumen, with outstanding anti-ageing performance achieved by formulations C, D, E and F (Irganox acid:NaMMT, Irganox acid: furfural without or with DLTDP or NaMMT). The rheological results showed that the AAC-modified bitumen samples displayed non-Newtonian characteristics associated with simple thermo-rheological materials. The AAC formulations A (DLTDP:furfural), D (Irganox acid:furfural) and F (DLTDP:Irganox acid:furfural) were shown to significantly strengthen the resistance of the bitumen samples to fatigue cracking. In contrast to Irganox acid: furfural combination, the addition of the NaMMT nanofiller to this mixture was found to enhance the rutting resistance of the aged bitumen samples.

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