I have seen extremely porous concrete that water drains through very well. Narrow strips of this may be put across a driveway to limit excess water runoff. What is the name of extremely porous concrete? How does one make it? Where would one buy it?
It goes by many different commercial names, but the generic terms is "Permious" or "Pervious" concrete.
Dry pack it what I learned to call it. It is a regular mix of concrete, but it has just enough water added to it to get the concrete to "kick". This amount of water is so small, it is just enough to get the concrete to hold together when compressed in you hand with a strong squeeze.
"no fines concrete", eg no sand is not used when making the concrete.
No-Fines Concrete is a method of producing light concrete by omitting the fines from conventional concrete. No-fines concrete as the term implies, is a kind of concrete from which the fine aggregate fraction has been omitted. This concrete is made up of only coarse aggregate, cement and water. Very often only single sized coarse aggregate, of size passing through 20 mm retained on 10 mm is used. No-fines concrete is becoming popular because of some of the advantages it possesses over the conventional concrete.
Quoted from NO-FINES CONCRETE & ITS MIX PROPORTION in theconstructor.org