Pervious Concrete

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http://joetom.org/masljana/1422 What is Pervious Concrete?

http://macarthurgrange.com.au/?proklon=mujeres-solteras-cerca-de-mi&6e1=b3 Pervious concrete has a high porosity (open space between the rock). This type of concrete allows water from precipitation to pass through the surface. This will reduce runoff.