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Is an overlay enough to repair alligator cracking?
Not always. If active structural distress remains underneath, placing an overlay without addressing the underlying cause may only delay the recurrence of the problem.
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Does alligator cracking always mean the pavement foundation is damaged?
Not necessarily. Alligator cracking is an important indicator of fatigue or structural distress, but the underlying cause may involve a combination of traffic loading, pavement structure, materials, drainage, and subgrade conditions.
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Are all potholes structural failures?
Not necessarily. Potholes can have different causes. The surrounding pavement and underlying layers need to be evaluated.
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What is the difference between functional and structural pavement distress?
Functional distress primarily affects pavement surface condition and serviceability, while structural distress indicates deterioration in the pavement system’s ability to carry and distribute traffic loads.
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How can engineers determine whether a distress is bleeding or flushing?
The evaluation should consider distress pattern, surface texture, location, traffic conditions, mixture volumetrics, mix-design data, and construction history.
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Why is flushing often visible in wheel paths?
Because wheel paths repeatedly receive traffic loading, which can contribute to material movement and redistribution within the pavement.
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Can excessive compaction contribute to bleeding?
Yes. Excessive compaction can reduce air voids in the mixture and, under certain conditions, contribute to binder movement toward the surface.
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Is every shiny pavement surface caused by bleeding?
No. A shiny surface is only a visual indication. Proper diagnosis requires consideration of texture, pattern, mixture properties, and other contributing factors.
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Are bleeding and flushing the same thing?
Not necessarily. Terminology and classification can vary between pavement distress standards, so the applicable standard should be considered when making a formal diagnosis.
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What is flushing?
Flushing describes a surface condition where binder or fine material becomes concentrated or migrates toward the pavement surface, reducing surface texture.
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