Most Luxembourg's concretes are usually made with frenchs and germans siliceous alluvial granulates of Moselle, but those reserves are preserved or protected. Our study was allowed formulation concretes using the local materials higher proportion (Luxembourg Sandstone) and industrials residues (used kieselguhrs frombrewery filters) in the own of their elimination. Actually, used kieselguhrs are stocked in rubbish dump or spreaded, that cause many problems as volume stockage, smelIs and public health. Used kieselguhrs study revealed the necessity of elimination of the organic matter accumulate during boer filtration. A buming process has been work out. Independents measures realized on the principles brewery filters components (diatomeous earth, perlite) gave .concrete formulation parameters (bulk density, absorption,porosity. ). Sorne tests quantified the great pozzolanic reactivity ofthose products and their effects on concretemechanical characteristics, Long-range chemicals analysis confirmed precedents results and supply details on chemicals reactions between pozzolanas and cement compounds.Theoretical optimization concrete has been effected with the recents models of granular mix calculus packing density, It permits to define the experimentals studies that serve to elaborate abacus and to understand grittyconcretes comportment. Freschs concretes characteristics don't change with adjunction of burned kieselguhrs, contrary to mechanical resistivity that increases. ; Les bétons hydrauliques du Grand-Duché du Luxembourg sont fabriqués aujourd'hui presque exclusivement avec les granulats siliceux de Moselle provenant des pays limitrophes (Allemagne, France). Mais ces ressources s'épuisent ou sont gardées en réserve. Le sujet consiste à formuler des bétons utilisant la plus grande proportion possible de matériaux locaux (grès du Luxembourg), en y incorporant également des résidus industriels dans le but de les éliminer : les kieselguhrs usagés des filtres des brasseries. Actuellement, la majeure partie des ...