Excessive compaction of pervious concrete results in higher compressive strength, but lower porosity (and thus lower permeability).
en.wikipedia.org Pervious concrete is traditionally used in parking areas, areas with light traffic, residential streets, pedestrian walkways, and greenhouses.
en.wikipedia.org The umbilicus is funnel-shaped, rather large, pervious, its wall with raised, concentric and radiating striae, more or less beade.
en.wikipedia.org On election day, little more than 3 million people cast their vote, a sharp decline in turnout if compared to the pervious primaries but well beyond the rosiest prospects nonetheless.
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