3 ms·
Mechanically crushed rock can be used in concrete in place of river sand. There's no danger of stripping the rivers bare of sand (or running out of materials to
by philipkglass 3y ago
Mechanically crushed rock can be used in concrete in place of river sand. There's no danger of stripping the rivers bare of sand (or running out of materials to make concrete) in places that have a modicum of environmental laws and law enforcement. Sand theft operations plague places with weak rule of law, where there's free money to be made by stealing from the commons even when responsible ways to make concrete are only modestly more expensive.
- fghorow 3y agoCrushing rock is very energy intensive (Griffith theory of fracture mechanics). It's much better to let Mother Nature crush the rocks through stream action. (Sort of hydroelectric, without the electric parts.) Your suggestion would only replace one environmental cost with a different one. TANSTAAFL.
- iancmceachern 3y agoSo is digging it up and transporting it...
- csin 3y agoYou would have to transport it regardless. Whether it's crushed rock or sand.
- iancmceachern 3y agoBut how far? If you use old concrete from a building project in the city, crush it, then truck it 10 Miles to the new build site. If you get it from far away you could be trucking it thousands of Miles