scholarly journals Analysis on mechanics response of long-life asphalt pavement at moist hot heavy loading area

2018 ◽  
Author(s):  
Xinquan Xu ◽  
Hao Li ◽  
Chuanhai Wu ◽  
Shanqiang Li
Keyword(s):  
Asphalt Pavement ◽  
Long Life

scholarly journals Effect of Cereclor as Rejuvenator to Enhance the Aging Resistance of Reclaimed Asphalt Pavement Binder

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1582 ◽  
Author(s):  
Ghulam Yaseen ◽  
Imran Hafeez
Keyword(s):  
Artificial Aging ◽  
Asphalt Pavement ◽  
Colloidal System ◽  
Reclaimed Asphalt Pavement ◽  
Aging Effects ◽  
Reclaimed Asphalt ◽  
Long Run ◽  
Aging Resistance ◽  
Long Life

Asphalt is the most commonly used material for pavement construction around the world, and therefore, it is vital to acquaint a practice that restores the reclaimed asphalt pavement (RAP) binder properties to the required level of performance by adding proper rejuvenators. However, a rejuvenator may perform better in the early stages of its application but may not necessarily perform better in the long run. The aim of this study is to assess the rejuvenation effect on the aging resistance of RAP binder in long-life performance through applying artificial aging. In this study, base virgin binder of pen grade 60/70 and RAP binder rejuvenated with Cereclor were subjected to artificial aging to simulate the short- and long-term aging effects. Penetration, softening point, ductility, and viscosity; saturates, aromatics, resins, and asphaltene (SARA) fractionation; and Fourier-transform infrared (FTIR) spectroscopy, bending beam rheometer (BBR), and dynamic shear rheometer (DSR) tests were conducted to evaluate the potential improvements in various properties of RAP binder. The results indicated that the physical, fractional composition, rheological, and aging resistance of RAP binder improved through the rejuvenation mechanism. Therefore, the rejuvenator improved the chemical structure through re-balancing the constituents in the colloidal system, even after long-term re-aging, which proves it to be an aging-resistant binder. Furthermore, it has been concluded that Cereclor has substantial rejuvenation potential even after applying artificial aging, and it can be utilized in pavement recycling to achieve long-life performance. Furthermore, the results depict good correlations between the physical, rheological, and chemical parameters of virgin and RAP binder.

Study on the Strain Fatigue Threshold of Asphalt Mixture for Long-Life Asphalt Pavement

ICCTP 2010 ◽  
2010 ◽  
Author(s):  
Jian-ping Zhu ◽  
Xing-hua Fan ◽  
Min-jiang Zhang ◽  
Shuang Gao
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fatigue Threshold ◽  
Long Life

scholarly journals Feasibility Evaluation of a Long-Life Asphalt Pavement for Steel Bridge Deck

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
Leilei Chen ◽  
Zhendong Qian ◽  
Daoxie Chen ◽  
Ya Wei
Keyword(s):  
Service Life ◽  
Bridge Deck ◽  
Asphalt Pavement ◽  
Base Layer ◽  
Experimental Program ◽  
Steel Bridge ◽  
Feasibility Evaluation ◽  
Long Life ◽  
Pavement Structure ◽  
Bridge Deck Pavement

In order to extend the service life of the steel bridge deck pavement, a long-life steel bridge deck pavement (LLSBDP) was put forward referring to the concept of long-life asphalt pavement. First, the requirements of the LLSBDP were given, based on which, an LLSBDP structure “EAC + SMA” was proposed. Second, a numerical analysis was performed to evaluate the stress status of the “EAC + SMA” structure. Third, an experimental study was conducted to assess the performance of the pavement material and the pavement structure. Meanwhile, for comparison, the performances of traditional steel bridge deck pavement structure “EAC + EAC” were also studied in the numerical and experimental program. The results showed that, with periodical rehabilitation or reconstruction of the SMA surface layer, the EAC base layer can last for a long life without structural distresses. The proposed structure can meet the requirements of LLSBDP and can be used to extend the service life of the steel bridge deck pavement.

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