Hi,
Porous pavements might be well on the way to replace traditional concrete or impervious material in parking , walkways and driveways etc, where structural efficiency of the material is not of priority.
So I have listed the merits and demerits of porous pavements.
Advantages
- You can recharge ground water much better.
- In the winter it doesn't freeze up like regular pavement does.
- Filters the water in much the same way underlying soil in a field or forest does
- Porous pavement tends to collect storm water better, so there is less runoff going into rivers and streams.
- Providing better traction (no water on the surface)
Disadvantages
- It is more brittle than conventional asphalt, so snowplow drivers have to be careful
- On smaller paving jobs, where extensive storm-water controls are not needed, porous pavement tends to cost about 20 to 25 percent more than standard asphalt
- Porous pavement also only works on new projects; repaving impervious asphalt does not reap the benefits of the material's ability to absorb water.
