Performing comprehensive research on the functional behavior of asphalt pavements under the influence of various environmental and structural parameters can better assist the engineers in the design and maintenance of asphalt pavements.
Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analysis showed the characteristics and distribution of the major functional groups of modified asphalt before and after ageing.
Afterward, asphalt fraction components, functional groups, and microstructures of virgin, aged and bio-oil rejuvenated asphalts, together with the molecular information of bio-oil, were analyzed with the aid of micro testing techniques.
The FTIR test was conducted to evaluate the possibility of any chemical reaction taken place, as well as to characterize the effects of oxidation on the chemical functional groups present in foamed asphalt binders.
Temperature is one of the most important factors affecting functional as well as structural performance of asphalt pavements with thick asphalt layer (>30 cm).
The analyses of test results show that Changbai and Linjiang diatomite particles distribute well in asphalt and no new functional group generated after adding diatomite into asphalt, and the thermal physical properties of asphalt mixture are changed.
When asphalt oxidizes, the six functional groups (ketones, carboxylic acids, anhydrides, aldehydes, amides and esters) with the carbonyl group can be found in the polar part of asphalt based on FTIR ATR spectral data and references.
Due to the growing trend of amount of traffic loads, the engineers attempt to improve the functional characteristics and properties of hot mix asphalt using the additives.
During the asphalt aging process, the six functional groups (carboxylic acids, aldehydes, amides, anhydrides, esters and ketones) containing the carbonyl group can be found in the asphalt binders based on the Fourier Transform Infrared Spectroscopy (FTIR) test results and references.
The functional groups containing the carbonyl group in the asphalt binders can be also used to correlate to the oxidation extent of asphalt binders.
