- The Compagnie des Ciments Belges
CCBs activities include cement, aggregates and ready mix concrete. [English, French and Dutch] ... http://www.ccb.be/fr/index.asp
| | - The Background Behind Helix and Polytorx
Helix are toothpicksized, pieces of twisted wire with a triangular cross section, developed at the University of Michigan in 1997 then licensed and commercialized by Polytorx LLC. With its screwlike shape, Helix works by locking into concrete like a ... http://www.polytorx.com/
|