An curved arrow pointing right. Tarmac has created Topmix Permeable, a porous concrete that allows rain water to flow though it. Up to 880 gallons of water can trickle through Topmix, which could ...

There’s an old Joni Mitchell song that starts off, “They paved paradise and put up a parking lot.” The folks behind Percoa are hoping to turn that song’s message on its ear.

All these containment applications rely on concrete structures to keep water in its place ... cracking on the project during the design stage. As a result, the engineer specified a shrinkage ...