Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt

Cui, Yue; Glover, Charles J.; Bražiūnas, Justas; Sivilevičius, Henrikas

doi:10.1016/j.conbuildmat.2017.11.095

Cited by 25 publications

(15 citation statements)

References 19 publications

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“…In all cases the film thickness was kept minimum in order to exclude, as much as possible, the diffusion effect from the coupled reaction-diffusion phenomenon of ageing. By minimising the film it is assumed that the diffusion effect will be eliminated and primarily oxidation will be the dominating process [30][31][32]. Instrumental constraints resulted in thicker films for the EPR analyses which may have experienced an increased diffusion.…”

Section: Materials and Ageing Treatmentmentioning

confidence: 99%

Experimental investigation of the oxidative ageing mechanisms in bitumen

Pipintakos

Ching

Soenen³

et al. 2020

Construction and Building Materials

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Section: Materials and Ageing Treatmentmentioning

confidence: 99%

Experimental investigation of the oxidative ageing mechanisms in bitumen

Pipintakos

Ching

Soenen³

et al. 2020

Construction and Building Materials

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“…For ageing recognition and quantification, researchers have established different parameters to characterise the carbonyl-growth, one of which is carbonyl area (CA) that is defined as the integral area under the absorbance curve from FTIR tests within a wavelength range from 1820 to 1650 cm -1 [7]. The carbonyl area was intensively used to quantify the ageing performance of the bitumen; however, it has limitations in comparing the modified binders when the additives themselves contain carbonyl functional groups in their primary chemical form and may change during the ageing process [5].…”

Section: Introductionmentioning

confidence: 99%

Impact of anti-ageing compounds on oxidation ageing kinetics of bitumen by infrared spectroscopy analysis

Omairey

Zhang

Al‐Malaika

et al. 2019

Construction and Building Materials

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This paper investigates the effect of different anti-ageing compounds (AACs) on the oxidation kinetics of bitumen using Fourier Transformation Infrared (FTIR) spectroscopy. Twenty different AACs were examined, including new and existing AACs for bitumen and polymer products. The AACs were mixed with bitumen to fabricate thin film samples of AAC-modified bitumen which were subjected to laboratory oven ageing at 100 ºC with different ageing periods up to 504 hours. A Normalized Carbonyl Index (NCI) was proposed based on a selected reference peak (1377 cm-1) to eliminate the impact of the inherent carbonyl content from the bitumen or AACs and manifest the carbonyl growth rate for evaluating the AACs' anti-ageing performance. It was found the activation energy of fast-term oxidation can be utilized to quantitatively screen the anti-ageing compounds and evaluate their anti-ageing effectiveness in terms of decreasing the formation of carbonyl groups in bitumen. AACs that exhibited high anti-ageing performance were those contained furfural, Irganox acid with sodium montmorillonite, furfural with DLTDP, and high concentrations (e.g., 15%) of Irganox acid. The proposed protocol should be followed by further laboratory rheological and mechanical tests on the AAC-modified bitumen with different binder sources.

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“…It is another way of expressing the concentration of gases. Under a higher pressure, or at a higher concentration, more oxygen molecules are dissolved in bitumen based on the Henry's law (Cui, Glover, Braziunas, & Sivilevicius, 2018;Herrington, 2012;Jin, Han, Cui, & Glover, 2011;Prapaitrakul, Han, Jin, & Glover, 2009), Equation (5).…”

Section: Chemical Results and Analysismentioning

confidence: 99%

Ageing Effect on Chemo-Mechanics of Bitumen

et al. 2018

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Ageing has a significant impact on the chemical and mechanical properties of bituminous materials. In this study, Fourier Transform Infrared (FTIR) spectrometer and Dynamic Shear Rheometer (DSR) tests were utilised to investigate the effect of ageing on the chemical and rheological 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 bitumen samples. 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 analysed to determine the evolution of the black diagrams, 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. The results were validated by using data of field aged samples.

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Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt

Cited by 25 publications

References 19 publications

Experimental investigation of the oxidative ageing mechanisms in bitumen

Experimental investigation of the oxidative ageing mechanisms in bitumen

Impact of anti-ageing compounds on oxidation ageing kinetics of bitumen by infrared spectroscopy analysis

Ageing Effect on Chemo-Mechanics of Bitumen

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