Next Article in Journal
Application of Crumb Rubber in Cement-Matrix Composite
Next Article in Special Issue
Geometric Characteristics of BOF Slag Coarse Aggregate and its Influence on Asphalt Concrete
Previous Article in Journal
Preparation and Characterization of Poly(δ-Valerolactone)/TiO2 Nanohybrid Material with Pores Interconnected for Potential Use in Tissue Engineering
Previous Article in Special Issue
Damage Detection of Asphalt Concrete Using Piezo-Ultrasonic Wave Technology
Article Menu
Issue 3 (February-1) cover image

Export Article

Open AccessArticle
Materials 2019, 12(3), 530; https://doi.org/10.3390/ma12030530

Aging Characteristics of Bitumen from Different Bituminous Pavement Structures in Service

1
Research and Development Center of Transport Industry of Technologies, Materials and Equipments of Highway Construction and Maintenance, Zhengzhou 450052, China
2
Henan Engineering Research Center of Intelligent Highway Big Data, Zhengzhou 450052, China
3
School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China
4
Engineering Research Center of Pavement Materials, Ministry of Education of P.R. China, Chang’an University, Xi’an 710064, China
*
Author to whom correspondence should be addressed.
Received: 20 January 2019 / Revised: 30 January 2019 / Accepted: 31 January 2019 / Published: 10 February 2019
(This article belongs to the Special Issue Sustainable Designed Pavement Materials)
  |  
PDF [6755 KB, uploaded 10 February 2019]
  |  

Abstract

The aging of bitumen seriously affects the service life of bituminous pavements. At present, there are many related researches on bitumen aging, but most of them focus on aging endured in indoor surroundings and conditions. Therefore, the conclusions obtained cannot reflect the actual aging changes of bitumen in bituminous pavements in service. In order to study the comprehensive aging process and mechanism of bitumen under the influence of service, we studied bridge deck, traffic lane, and ramp with bituminous pavement structures in service. The bitumen samples obtained from the core samples in different bituminous pavement structures were characterized by gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), dynamic shear rheometer (DSR), and fluorescence microscope (FM). The aging degree of different bitumen was analyzed, and conclusions were drawn on changes to bitumen aging from different pavement structures. The results showed that the aging degree of bitumen from the upper layer was the most serious, the aging degree of bitumen at the middle layer was weaker than that of bitumen from the upper layer, and the aging degree of bitumen from the bottom layer was the weakest for the different bituminous pavement structures. The aging of bitumen mainly occurred due to oxygen absorption. After aging, viscoelastic components of bitumen changed, and bitumen became harder. The macromolecule of bitumen could be divided into small molecules, and the small molecular weight of bitumen became large. The styrene-butadiene-styrene (SBS) modifier in the modified bitumen became granular after aging, and it appeared as a single phase in bitumen. The aging changes characterized by different analytical methods showed that the aging degree of bitumen from different layers of bituminous pavement structures in service was different. Effective measures should therefore be taken in time to decrease further aging of bitumen from the upper layer of bituminous pavements due to its inevitable early aging in service. View Full-Text
Keywords: aging characteristics; bitumen; bituminous pavement structures; in service; microscopic characterizations aging characteristics; bitumen; bituminous pavement structures; in service; microscopic characterizations
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Wang, X.; Guo, H.; Yang, B.; Chang, X.; Wan, C.; Wang, Z. Aging Characteristics of Bitumen from Different Bituminous Pavement Structures in Service. Materials 2019, 12, 530.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top