A lack of bond between paved layers can lead to what issue?

When there is a lack of bond between paved layers, it can lead to slippage. This slippage occurs when the layers do not adhere properly to each other, resulting in the upper layer moving or slipping over the lower layer under the influence of traffic loads or thermal stresses. The absence of a strong bond means that the friction and interlocking required to maintain stability between the layers are compromised, which can cause the surface layer to shift and create a visible separation or displacement.

This phenomenon can further lead to surface distresses such as cracks and ruts, ultimately affecting the longevity and performance of the asphalt pavement. Recognizing and addressing issues related to bonding between layers is therefore crucial for ensuring a durable and resilient pavement structure.