InfraStructures - November 2009 - ADM Offers Recycle Systems To Enhance Cost-Efficiency

ADM Offers Recycle Systems To Enhance Cost-Efficiency

Asphalt Drum Mixers, Inc. (ADM), offers four models of portable and stationary recycle systems to enhance the cost-efficiency of asphalt plants. Recycle systems allow plants to use milled material in hot mix asphalt (HMA).

Since recycled asphalt pavement (RAP) is much cheaper than virgin aggregate, the result is a less expensive finished product that maintains the high quality of a pure virgin aggregate mix.

ADM’s recycle bins feature a 13 600 kg capacity and are continuously welded at the seams. The bins contain angle irons and midsection stiffeners for reinforcement, and their steeply sloped sidewalls help prevent material from plugging or bridging.

A tapered discharge opening leads to the direct-drive belt feeder with a 5-hp motor, multi-ply belt, self-cleaning tail pulley and adjustable skirt boards.

To transfer RAP from the bin, the recycle system includes a heavy-duty weigh conveyor that features a channel frame and wind shroud protection for accurate weighing. The conveyor is 61 cm wide and, depending on the model, between 13,7 m and 19,8 m long. It introduces RAP to the dried aggregate mix after the heating process. Based on conditions and type of plant, up to 50% of the HMA can contain recycled pavement.

Portable units feature a heavy-duty I-beam frame on a gooseneck trailer with a fifth-wheel kingpin hitch, single axle and air brakes. The trailer includes hinged support legs and a hydraulically controlled incline conveyor.

An optional lump breaker is available for ADM’s recycling systems to break down large pieces of RAP into a useable size. It features an adjustable steel breaker plate and replaceable tungsten-tipped teeth, and is powered by a 30-hp, high-efficiency motor with an open-mesh covered V-belt drive. Single- and double-deck scalping screens are also available to ensure oversized material does not enter the aggregate mix. Other options include air cannons, grizzlies, bin extensions, adjustable legs with sand shoes, and a skid with bolt-on support legs.

Source: Asphalt Drum Mixers, Inc.