Which component serves as the topmost layer for surface paving in ICPS?

Which component serves as the topmost layer for surface paving in ICPS?

• A. Edge restraint
• B. Pavers w/ joint sand
• C. Base (compacted aggregate)
• D. Sub-base (compacted)

Answer: (B)

The surface you walk on in an interlocking concrete pavement system is the pavers with their joint sand. After the sub-base and base provide the structural support, the paving units are laid down and the joints between them are filled with sand. That combination forms the visible, topmost layer of the surface, delivering the finished appearance and the load-transfer mechanism through interlock. Edge restraints are important for keeping the perimeter stable, but they sit at the edges, not as the surface layer. The base and sub-base lie beneath the paving and support the surface, rather than being the topmost layer. So the best choice is the pavers with joint sand.

The surface you walk on in an interlocking concrete pavement system is the pavers with their joint sand. After the sub-base and base provide the structural support, the paving units are laid down and the joints between them are filled with sand. That combination forms the visible, topmost layer of the surface, delivering the finished appearance and the load-transfer mechanism through interlock. Edge restraints are important for keeping the perimeter stable, but they sit at the edges, not as the surface layer. The base and sub-base lie beneath the paving and support the surface, rather than being the topmost layer. So the best choice is the pavers with joint sand.