首页|Determination of SARA fractions in asphalts by mid-infrared spectroscopy and multivariate calibration
Determination of SARA fractions in asphalts by mid-infrared spectroscopy and multivariate calibration
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NSTL
Elsevier
The SARA fractions in petroleum asphalts for road paving play a dominant role in the pavement performance of asphalt binders. In this study, a rapid and accurate determination method of SARA fractions in asphalts was proposed using Mid-Infrared (MIR) spectra and Partial Least Square Regression (PLSR) modeling method. Firstly, the blending and progressive aging process employed in this study successfully prepared 84 asphalt samples with fair differences in their Saturates, Aromatics, Resins and Asphaltenes (SARA) fractions. Secondly, the SARA fractions and MIR spectra of these samples were measured and collected by standard test methods, respectively. Finally, four quantitative calibration models were developed for each fraction using MIR spectra and PLSR method, and the validation results verified the high consistency between the measured values and the predicted values as well as the reproducibility and repeatability of the proposed method. This MIR-PLSR method was able to provide a faster SARA determination than the standard test methods through a single MIR spectrum. It could probably be used for the real-time quality control of asphalt production and the in-situ quality inspection of asphalt materials in road construction using portable equipment.
AsphaltSARA fractionsMid-infrared spectraMultivariate calibrationPartial least square regression
Jin Li、Xinyuan Xing、Xiangdao Hou、Tao Wang、Jiayu Wang、Feipeng Xiao
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Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai, China
Department of Traffic Engineering, School of Traffic and Transportation, Beijing Jiaotong University, Beijing, China
Department of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing, China
NSTL
Elsevier
