Concretum - the fastest concrete Concretum offers a rapid-hardening concrete that reaches full strength just one hour after pouring. Our rapid-hardening concrete has been in use successfully since 2004 to reconstruct airport pavements and motorways without disrupting traffic. Up to 1,000 m2 of concrete pavement can be replaced in a six-hour overnight stage. The use of Concretum rapid-hardening concrete is therefore the most economic and sustainable way to maintain the quality of our transport infrastructure over the long term.