Study on the Content Detection of Asphalt Modifier Based on Infrared Spectroscopy
The content of asphalt modifier in highway pavement will have a significant impact on the performance of asphalt.In order to improve the quality of asphalt on highway pavement and extend its service life,this article studies a method for detecting the content of road asphalt modifiers based on infrared spectroscopy.Samples with different content are prepared,dissolved in tetrahydrofuran to obtain a solution,and sample films are prepared.Use a Fourier transform infrared spectrometer to irradiate the thin film and analyze the content of the modifier based on the characteristic absorption peaks.The results showed that the characteristic peak at 977cm-1 was related to the modifier,while the char-acteristic peak of the matrix asphalt was related to the methyl group.This method has high detection accuracy,with an error of less than 0.1%,and is suitable for detecting the content of asphalt modifiers in highway pavements.
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