scholarly journals Low Temperature Performance Characteristics of Reclaimed Asphalt Pavement (RAP) Mortars with Virgin and Aged Soft Binders

2017 ◽  
Vol 7 (3) ◽  
pp. 304 ◽  
Author(s):  
Feipeng Xiao ◽  
Ruoyu Li ◽  
Henglong Zhang ◽  
Serji Amirkhanian
Keyword(s):  
Low Temperature ◽  
Asphalt Pavement ◽  
Performance Characteristics ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance

scholarly journals Towards the Use of Waste Pig Fat as a Novel Potential Bio-Based Rejuvenator for Recycled Asphalt Pavement

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1002
Author(s):  
Nader Nciri ◽  
Taesub Shin ◽  
Namho Kim ◽  
Arnaud Caron ◽  
Hanen Ben Ismail ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Pavement ◽  
Fatigue Cracking ◽  
Recycled Asphalt ◽  
Excellent Thermal Stability ◽  
Temperature Performance ◽  
Aged Asphalt ◽  
Ft Ir ◽  
Low Temperature Performance ◽  
The Impact

This article presents a novel potential bio-based rejuvenator derived from waste pig fat (WPF) for use in recycled asphalt applications. To achieve this purpose, the impact of different doses waste pig fat (e.g., 0, 3, 6, and 9 wt.% WPF) on the reclaimed asphalt pavement binder (RAP-B) performance is investigated. The unmodified and WPF-modified asphalts are characterized by means of Fourier-transform infrared spectroscopy (FT-IR), thin-layer chromatography–flame ionization detection (TLC-FID), scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Physico-rheological properties of asphalt blends are assessed through Brookfield viscometer, softening point, penetration, and dynamic shear rheometer (DSR) tests. TLC-FID data highlighted that incremental WPF addition into RAP-B restored its original balance maltenes-to-asphaltenes ratio; finding which was supported by FT-IR analysis. SEM disclosed that WPF has a great compatibility with the aged asphalt. AFM observations showed that grease treatment induced a decline in surface roughness (i.e., bee structures) and a rise in friction force (i.e., para-phase dimension) of RAP binder. TGA/DSC studies revealed that the bio-modifier not only possesses an excellent thermal stability but also can substantially enhance the binder low-temperature performance. Empirical and DSR tests demonstrated that WPF improved the low-temperature performance grade of RAP-B, reduced its mixing and compaction temperatures, and noticeably boosted its fatigue cracking resistance. The rejuvenation of aged asphalt employing WPF is feasible and can be an ideal approach to recycle both of RAP and waste pig fats.

Effects of different colorants on service performance for colored asphalt pavement in cold regions

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xinxin Fu ◽  
Yanjun Chen ◽  
Minggang Sun ◽  
Tengjiang Yu
Keyword(s):  
Iron Oxide ◽  
Low Temperature ◽  
Asphalt Pavement ◽  
Service Performance ◽  
Temperature Adaptation ◽  
Cold Regions ◽  
Content Type ◽  
Temperature Performance ◽  
Study Results ◽  
Low Temperature Performance

Purpose The service performance for colored asphalt pavement is inevitably affected by the addition of different colorants, especially the challenge of low temperature environment in cold regions. Therefore, the purpose of study is to explore the effects of different colorants on the service performance for colored asphalt pavement and to provide a foundation for improving the applicability of colored asphalt pavement in cold regions. Design/methodology/approach In the study, three kinds of colorants (iron oxide red, iron oxide yellow, iron oxide green) were used to compare the influence of different colorants amounts and different colorants kinds on the service performance for colored asphalt pavement in cold regions. According to the characteristics of low temperature in cold regions, the effects of different colorants on the low temperature performance for colored asphalt pavement were studied. Findings The study shows that different colorants have different effects on the service performance of colored asphalt pavement. The high temperature performance increases with the increase of the colorants amount, but the low temperature performance is opposite. Additionally, the yellow colored asphalt pavement has more advantages of low temperature adaptation than the red and green colored asphalt pavement. Originality/value The study results provide a certain theoretical foundation for the application of colored asphalt pavement in cold regions and have certain value and significance for the further development of colored asphalt pavement.

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