Permeable pavements: Specifications

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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.

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