Asphalt Aging and Durability Research

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 20 June 2024 | Viewed by 1072

Special Issue Editors


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Guest Editor
Assistant Professor, Department of Civil and Industrial Engineering, University of Pisa, 56122 Pisa, Italy
Interests: asphalt; polymer modified asphalts. Polymer nanocomposites; energetic polymers

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Guest Editor
Associate Professor, Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 2, 56122 Pisa, Italy
Interests: asphalt durability; polymer modified bitumen; polymer nanocomposites; polymers compatibilization; recycling and reuse of waste materials; biopolymers

Special Issue Information

Dear Colleagues,

In the last century, asphalt has been used worldwide as the main binder in road construction. The need to work under different climate conditions and the continuous growth of traffic speed and loads pushed the research to develop many formulations and modifiers that considerably improved asphalt performance. Nevertheless, during the in-life service, asphalt is exposed to thermal, oxidative and mechanical stresses that affect its chemical composition and rheological properties. The result is a deterioration of the pavement that may be subjected to rutting, embrittlement, cracking etc. The whole concept is summarized under the word ageing, which is one of the major subjects of the recent scientific and patent literature in this field.

The ageing and durability of asphalts may be approached in several ways, such as the development of appropriate procedures to artificially simulate short- and long-term ageing, the individuation of chemical and performance parameters to both directly and indirectly quantify the level of aging, the development and implementation of new additives and modifiers to slow ageing or promote self-healing. All these efforts to better understand and describe ageing have the final goal of extending pavement durability. However, since ageing remains inevitable and irreversible, another very important aspect that has been gaining attention in recent years is the use of rejuvenators to restore the original properties and thus recycle end-of-life binders. Researchers are therefore encouraged to submit their latest findings and results as full-length articles or reviews related to the above-mentioned topics.

Dr. Giovanni Polacco
Dr. Sara Filippi
Guest Editors

Manuscript Submission Information

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Keywords

  • asphalt
  • bitumen
  • ageing
  • durability
  • antioxidants
  • rejuvenators
  • artificial ageing
  • ageing indexes

Published Papers (1 paper)

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Research

16 pages, 3175 KiB  
Article
Experimental Research on High-Temperature Stability of Asphalt Concrete Panels of Impermeable Layers
by Qunzhu Han, Ge Song, Yueyan Wang, Yingbo Zhang and Zhiyuan Ning
Appl. Sci. 2023, 13(13), 7555; https://doi.org/10.3390/app13137555 - 26 Jun 2023
Viewed by 760
Abstract
In order to study the slope stability of an impervious layer asphalt concrete panel, in this study, the maximum aggregate size used was 19 mm, and a slope flow value test was carried out after changing the gradation index, filler content and bitumen [...] Read more.
In order to study the slope stability of an impervious layer asphalt concrete panel, in this study, the maximum aggregate size used was 19 mm, and a slope flow value test was carried out after changing the gradation index, filler content and bitumen aggregate ratio. The test results showed that the relationship curve between the slope flow value and the test time was mainly divided into three stages for the slope flow value: an almost linear growth stage, a gradual stabilization stage, and a stable stage. The grading index, bitumen aggregate ratio and filler content had an effect on the slope flow value of asphalt concrete. The slope flow value decreased with the increase in the grading index. A reasonable increase in the grading index can increase the slope stability of the asphalt concrete panel. The slope flow value increased with the increase in the filler content and bitumen aggregate ratio. When the filler content exceeded 13%, the slope flow value significantly increased. At the same time, it was also verified that the asphalt concrete slope with the maximum aggregate size of 19 mm had good thermal stability. On this basis, a prediction model of asphalt concrete slope flow value and test time was established. The model considered the effect of different parameters of mix proportion on the slope flow value. The calculation results were in good agreement with the test results. Full article
(This article belongs to the Special Issue Asphalt Aging and Durability Research)
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