For the impervious layer in hydraulic asphalt concrete panels

this study examine its crack-healing characteristics by conducting beam bending tests

crack observation

and ultrasonic non-destructive testing on fiber-reinforced asphalt concrete. We make a comparative analysis of its crack-healing behaviors with those of the reference asphalt concrete

focusing on mechanical properties and structural integrity. Experimental results show that after seven days of a fiber concrete specimen immersed in water

its fibers￠ adsorption effect and elastic properties maintain the stability of its mechanical properties. Its bending healing rate reaches up to 95%

whereas the reference concrete has a rate as low as 41%. Water environment promotes surface healing significantly

with the highest rate up to 97%

far superior to that in dry conditions. For the fiber concrete

its internal damage healing is characterized with hysteresis-strengthening. The initial-stage healing hysteresis is attributed to the oil absorption effect of fibers

increasing the thickness of structural asphalt

while the synergistic deformation of fibers and asphalt ensures excellent continuous healing performance in the period of seven days. This study further achieves a multi-index collaborative evaluation method for the crack-healing performance of fiber-reinforced hydraulic concrete

and lays a basis for its engineering application.