Colored Permeable Concrete pavement includes structural composition, material composition, and thickness determination. The structural layers of colored permeable concrete pavement generally consist of a surface layer, a base layer, and a cushion layer. The design of colored permeable concrete pavement should select appropriate surface materials, permeable concrete base materials, and cushion materials with good water temperature stability according to different soil conditions and usage requirements, to ensure that the pavement structure has sufficient overall strength and permeability. When the subgrade is clay, a moisture-retaining cushion layer should be set.
For pedestrian walkways, bicycle paths, and other lightly loaded surfaces, the design surface thickness of permeable concrete should not be less than 6 cm; for parking lots, squares, and other medium-loaded surfaces, the design surface thickness of permeable concrete should not be less than 10 cm.
Base layer requirements: The base material for colored permeable concrete pavement must have appropriate strength and good permeability. The base material can be well-graded gravel, well-graded crushed stone, or porous cement-stabilized gravel with good permeability.
Cushion materials: Should have good moisture retention properties, used to improve the water and temperature conditions of the soil foundation when the conditions are poor, enhancing the water stability and frost resistance of the pavement structure. Cushions are generally made of natural gravel for ease of compaction.
Surface layer requirements: The surface layer should have appropriate strength, and should be flat, solid, wear-resistant, and have good permeability.
