A multi-scale fundamental investigation of moisture induced deterioration of porous asphalt concrete

Porous asphalt was investigated using a multi-scale experimental approach. In mega scale field inspections were used. Fatigue behavior in dry and wet state gave insight into the macro scale (150 mm ط) behavior showing reduction in the modulus and increase in phase angle in wet condition and after each thermal cycle. Characterization in micro scale was done using DSC, DSR, contact angles, ESEM and uniaxial tests. Results showed the difference in performance of PA materials in terms of durability and failure seen in macro and mega scales, can also be observed and quantified in their micro structure, and micro scale mechanical tests.