722
edits
Changes
Jump to navigation
Jump to search
Created page with "In permeable pavement systems, the sub-base is the layer of granular material that is laid on the sub-grade. The granular sub-base should be clear, crushed 50 mm stone. See the Permeable pavements: Specifications page for detailed sub-base material specifications. The construction steps, key inspection points, and mistakes to avoid for sub-base reservoir are the same as / similar to the guidance given in the storage reservoir section. However, depending on the municipal..."
In permeable pavement systems, the sub-base is the layer of granular material that is laid on the sub-grade. The granular sub-base should be clear, crushed 50 mm stone. See the Permeable pavements: Specifications page for detailed sub-base material specifications. The construction steps, key inspection points, and mistakes to avoid for sub-base reservoir are the same as / similar to the guidance given in the storage reservoir section.
However, depending on the municipality and the design, compaction of the sub-base reservoir may be required. For example, the City of Toronto’s Construction Specification for Permeable Interlocking Concrete Pavers (TS 861) details the following steps for sub-base installation:
1. Place sub-base aggregate in 200 mm lifts (maximum)
2. Compact each lift with a 9 ton vibratory roller, with two passes in vibratory mode and two passes in static mode, or until there is no visible movement of the aggregate.
3. Use a plate compactor for smaller areas that the vibratory roller cannot reach.
However, depending on the municipality and the design, compaction of the sub-base reservoir may be required. For example, the City of Toronto’s Construction Specification for Permeable Interlocking Concrete Pavers (TS 861) details the following steps for sub-base installation:
1. Place sub-base aggregate in 200 mm lifts (maximum)
2. Compact each lift with a 9 ton vibratory roller, with two passes in vibratory mode and two passes in static mode, or until there is no visible movement of the aggregate.
3. Use a plate compactor for smaller areas that the vibratory roller cannot reach.