New product announcements: 05/26/2010 Asphalt Plant Conveyor: Heavy-Duty Construction The new Drag Slat Conveyors from ADM can provide material transport in an asphalt plant at rates of up to 500 tons per hour. The conveyors feature reinforced weld-on slats and chrome carbine wear liners along the slat floor and sidewalls for added durability. Segmented sprockets allow for easier maintenance. The conveyor is available with either formed-steel or an all-welded bridge construction as well as either a single- or double-steel roller chain. Asphalt Drum Mixers Inc.; 260-637-5729; www.admasphaltplants.com Wall-Saw Power Unit: Electric Drive Delivers the Power The Hilti DS TS20-E Electric
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.