crushed stone Switzerland

... sludge from the stone washing process with the so-called mountain gravel. The fine limestone sludge forms carbonate crystals, which lead to optimal interlocking of the crushed limestone grains. This results in an unusually high strength of the lime-water-bound surface layer. Therefore, this recipe for sludged KFN Netstaler® 0-15 mm has remained effective to this day. KFN Netstaler® 0-15 mm is the only limestone gravel that is not only used regionally but practically throughout Switzerland as...