Production of Gravel and Concrete This Switzerland-based plant produces gravel and concrete. From the pit, the gravel is led by conveyor belts to the plant. Gravel is being distributed by barges, the so-called "Ledi"ships. The produced concrete is being distributed by specialised trucks; remnants of the concrete must be disposed off and collected at the plant. From time to time, concrete production has to remove cement crusts from the equipment. Metaflux 75-30 Kraft-Cleaner Special/Super is used to remove the deposits. The product is sprayed on with a hand-triggered bottle, allowed to act and then removed by using a high-pressure cleaning device. Source: Metaflux Switzerland, courtesy of KIBAG www.kibag.ch