used 20 ton per hour crushers for road building highways ...
· 20 40tons per hour quarry plant. . 250 Ton – 250 Ton New RockMaster 3042 Jaw Crusher SingleToggle, . the major raw material in road building and construction .. 4. ESTIMATING ROAD CONSTRUCTION UNIT COSTS. The unit cost of road construction in dollars per kilometer . of meters per hour that their equipment can build road based upon ...