Alligator cracking In Road

Series of interconnected cracks caused by fatigue failure of the HMA surface below repeated traffic loading. In skinny pavements, cracking initiates at the bottom of the HMA layer where the tensile stress is that the highest then propagates to the surface jointly or more longitudinal cracks. this can be normally referred to as ‘bottom-up’ or ‘classical’ fatigue cracking. In thick pavements, the cracks possibly initiate from the highest in areas of high localized tensile stresses ensuing from tire-pavement interaction and asphalt binder aging. when continual loading, the longitudinal cracks connect forming many-sided sharp-angled items that develop into a pattern resembling the rear of an alligator or crocodilian reptile.

Reasons of forming of alligator cracking:

Inadequate structural support, which may be caused by a myriad of things. some of the additional common ones are listed here:

1) Increase in pavement load-supporting characteristics

I) Loss of base, sub-base, or subgrade support.

ii) Stripping on the bottom of the HMA layer.

2) Increase in loading.

3) Inadequate structural an.

4) Poor construction.