![]() ![]() ![]() ![]() Poor drainage in the road bed is a frequent cause of this degradation of the base or subgrade. There are many ways that the subbase or base can be weakened. Frequently, overloading happens because the base or subbase inadequately support the surface layer and subsequently cannot handle loads that it would normally endure. However, fatigue cracking can be greatly influenced by environmental and other effects while traffic loading remains the direct cause. It is usually studied under the transportation section of civil engineering.įatigue cracking is an asphalt pavement distress most often instigated by failure of the surface due to traffic loading. It is important to prevent fatigue cracking, and repair as soon as possible, as advanced cases can be very costly to repair and can lead to formation of potholes or premature pavement failure. ![]() It is often a sign of sub-base failure, poor drainage, or repeated over-loadings. Fatigue cracking is generally a loading failure, but numerous factors can contribute to it. Cell sizes can vary in size up to 11.80 inches (300 mm) across, but are typically less than 5.90 inches (150 mm) across. The following is more closely related to fatigue cracking which is characterized by interconnecting or interlaced cracking in the asphalt layer resembling the hide of a crocodile. Moderate to severe fatigue cracking among the most common pavement crackingĬrocodile cracking, also called alligator cracking and perhaps misleadingly fatigue cracking, is a common type of distress in asphalt pavement. ![]()
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