What are the hours of work? http://vardenafil.in.net/ vardenafil At the University of Salerno in southern Italy, scientists working on the European research project EnCoRe (Environmentally-friendly solutions for Concrete with Recycled and natural components) are mixing what looks like ordinary concrete. But there is one added ingredient: the standard recipe including water, cement and aggregates has been improved by adding recycled industrial fibers to produce a greener, more sustainable concrete.