Ageing effect on chemo-mechanics of bitumen

Book chapter (2019)

Authors

R. Jing Pavement Engineering - CEG
Aikaterini Varveri Pavement Engineering - CEG
X. Liu Pavement Engineering - CEG
Athanasios Scarpas Pavement Engineering - CEG
S. Erkens Pavement Engineering - CEG
Research Group
Pavement Engineering (CEG) (TU Delft)
Copyright: © 2019 R. Jing, Aikaterini Varveri, X. Liu, Athanasios Scarpas, S. Erkens
DOI: https://doi.org/10.1007/978-3-030-00476-7_12
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Published Date

2019

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Pavement Engineering

Abstract

Ageing has a significant impact on the chemical and mechanical behavior of bituminous materials. In this study, Fourier Transform Infrared (FTIR) spectrometer and Dynamic Shear Rheometer (DSR) tests were utilized to investigate the effect of ageing on the chemical and mechanical properties of bitumen. Bitumen films with thickness of 2 mm were exposed to laboratory ageing at various conditions. Specifically, different combinations of ageing time, temperature and pressure were applied on the materials. The FTIR results were used to quantify the changes in the chemical functional groups and to calculate the combined ageing index (summation of carbonyl and sulfoxide indices) of bitumen. In addition, the DSR test results were analyzed to determine the evolution of the crossover frequency and crossover modulus with ageing. A linear relationship was found between the combined ageing index and the distance in the crossover map, providing thus a chemo-mechanics framework to describe bitumen ageing.

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