Analysis of asphaltic binders modified with PPA by surface techniques.


Samples of unmodified and modified asphalt binders containing 1% polyphosphoric acid were studied. Fourier-transform infrared spectroscopy was used to evaluate the structural indices of the functional groups present in the samples and the results indicated there was a strong interaction between the polyphosphoric acid and oxygenated species. Contact angle… (More)
DOI: 10.1111/jmi.12123


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