The new KMA 220 from Wirtgen America Inc. builds on the success of its predecessor, the KMA 200, by adding a third axle to enhance the roadability of this portable cold mix plant. All three air-suspension axles have raising and lowering capability, as well as automatic, load-dependent all-wheel air brakes.
The KMA 220 portable cold mixing plant from Wirtgen will mix 220 tph (199 t) of cold mix asphalt, without visible emissions and without requiring any EPA operating permits. Virgin and/or reclaimed materials can be processed using emulsions, foamed asphalt, lime, cement, polymer additives, fly ash and other materials. Because no heating is required, the mixing plant is virtually emission-free, according to the manufacturer.
To make foamed asphalt Green Mix with the KMA 220, milled reclaimed asphalt pavement (RAP), excavated road base, and crushed recycled concrete aggregate (RCA) all can be incorporated up to 100 percent in cold Green Mix from the KMA 220.
“In many ways, Wirtgen’s self-contained KMA 220, like its predecessor, the KMA 200, is the ultimate ’Green Machine’,” said Wayne Evans, Wirtgen vice president, business development/pavement technology. “Its productivity is such that it can produce a 20-ton truck load of up to 100 percent recycled asphalt cold mix every six minutes. Contractors can locate this permit-free portable plant at or near their projects and cut dozens of trucks from long hauls, slashing traffic congestion and truck diesel exhaust.”
Its features include its fully diesel-hydraulic drive of all components. Driving the KMA 220 is a completely modified, low-wear, twin-shaft continuous mixer, allowing a mixing capacity of 220 tph. The mixing plant is driven by a powerful diesel engine with an output of 175 hp (130 kw), and all components are fully diesel-hydraulic driven. To ensure an ample supply of water, the capacity of the water tank is 1,188 gal. (4,497 L).
The precise sequence of the mixing process and all cold mix recipes are easily monitored and controlled by the Cockpit Graphics Center (CGC), a user-friendly operating and control panel.
Grids on top of the material hoppers can be folded hydraulically to facilitate cleaning. Folding ramps on the sides of the material hoppers protect the plant from being contaminated.
The KMA 220 is powerful when in operation, but can be completely transported on its low-bed trailer. The loading conveyor is simply folded for transport, and the operator’s cabin is slewed into its transport position at the end of the low-bed.
For more information, call 615/501-0600 or visit www.wirtgenamerica.com.
