What is the purpose of cracking and seating or rubbilizing of PCC pavements?

What is the purpose of cracking and seating or rubbilizing of PCC pavements?

• A. To enhance surface texture
• B. To eliminate potential reflective cracking
• C. To increase aesthetics
• D. To decrease cost

Answer: (B)

The primary purpose of cracking and seating or rubbilizing Portland Cement Concrete (PCC) pavements is to eliminate potential reflective cracking. This technique involves intentionally cracking the existing concrete layer, which reduces stresses transmitted from the underlying layers to the surface layer when new asphalt is placed on top. By breaking the concrete into smaller pieces, the potential for reflective cracking, which occurs when cracks in the underlying layers propagate through the new surface, is significantly reduced. This helps extend the life of the new pavement overlay and provides a more durable surface. While enhancing surface texture, increasing aesthetics, and decreasing costs might be secondary benefits or considerations in pavement rehabilitation, they do not address the primary technical goal of cracking and seating or rubbilizing, which directly targets the mechanics of how cracks can form and propagate in layered pavement systems.

The primary purpose of cracking and seating or rubbilizing Portland Cement Concrete (PCC) pavements is to eliminate potential reflective cracking. This technique involves intentionally cracking the existing concrete layer, which reduces stresses transmitted from the underlying layers to the surface layer when new asphalt is placed on top. By breaking the concrete into smaller pieces, the potential for reflective cracking, which occurs when cracks in the underlying layers propagate through the new surface, is significantly reduced. This helps extend the life of the new pavement overlay and provides a more durable surface.

While enhancing surface texture, increasing aesthetics, and decreasing costs might be secondary benefits or considerations in pavement rehabilitation, they do not address the primary technical goal of cracking and seating or rubbilizing, which directly targets the mechanics of how cracks can form and propagate in layered pavement systems.