Permeable pavements: Specifications

specifications for pervious concrete, porous asphalt, and permeable pavers.

Material	Specification	Quantity
Pervious Concrete	* 28 day compressive strength = 5.5 to 20 MPa * Void ratio = 14% - 31% * Permeability = 900 - 21,500 mm/hr	Thickness will range from 100-150 mm depending on the expected loads
Porous Asphalt

A mixture of mineral aggregates bound with bituminous materials, used in the construction and maintenance of paved surfaces.

The void ratio (e) of a mixture is the ratio of the volume of void-space to the volume of solids. It is closely related to the concept of porosity (n) where porosity is the ratio of the volume of void-space to the total or bulk volume of the mixture. e = Volume of voids/Volume of solids = n/(1-n)

A mixture of mineral aggregates bound with bituminous materials, used in the construction and maintenance of paved surfaces.