Which of the following is a common cause of slippage cracking in asphalt?

Slippage cracking in asphalt occurs primarily due to inadequate bonding between layers. When the bond is weak, the top layer of asphalt can slide over the underlying layer, especially under the influence of heavy traffic loads or changes in temperature. This lack of adherence can lead to visible cracks that develop in a pattern resembling a slip or shear failure.

Inadequate bonding is often the result of poor application techniques during installation, insufficient adhesive materials, or improper temperature control when laying the asphalt. Ensuring that layers are applied correctly and that appropriate bonding agents are used is crucial to preventing this type of cracking.

While heavy traffic loading can exacerbate cracking and improper material selection can contribute to structural issues, the specific mechanism of slippage cracking is directly tied to the bonding between layers. Similarly, insufficient curing time affects the overall integrity of the asphalt mix but does not specifically address the slippage phenomenon.