August 2009

_{Keywords: Molded block for a system for covering areas; Foundation slab; Sound-absorbing construction elements and noise protection wall made of sound-absorbing construction elements; Trenche element; Device for positioning reinforcing stirrups on concrete elements; Masonry block of autoclaved aerated concrete; Method for manufacturing a cast-stone floor block and a surface-treated cast-stone floor block made by that method; Joint-cleaning machine for paved areas; Treatment compositions for fresh concrete or mortar surfaces which off er improved adhesion capacity and water retention power; Railway sleeper}