Relationship between the Void and Sound Absorption Characteristics of Epoxy Porous Asphalt Mixture Based on CT

This study investigates the relationship between void characteristics and sound absorption of an epoxy porous asphalt mixture. The specimens are scanned reconstructed under different fractions using X-ray computed tomography (CT) technology digital image processing, coefficients at frequencies obtained acoustic impedance tube. is analyzed gray correlation. test results exhibited a good correlation mixture by CT scanning (mesoscale) measured values (macroscale). difference fraction connected gradually decreased with increase in fraction. curve coefficient frequency bimodal trend, peak value increased order degree average characteristic parameters as follows: > equivalent diameter surface area curvature.