Slotsgrus®: A new concept for footpaths with unbound surfaces
ByG. Hildebrand, P. Kristoffersen & T. Dam
Pages 6

The new footpaths should be maintainable without pesticides only using mechanical equipment that to some extent treats the surface and the upper parts of the structure of the path. From this follows that the unbound constructed material could be surface treated again and again and the surface could be compacted to a desired level after every treatment.