Equipment World Digital Magazine
Issue link: http://read.dmtmag.com/i/536721
EquipmentWorld.com | July 2015 57 have to make sure what they're getting in the mix is what's called for in the mix design. In order for us to do Ohio DOT work we have to make blended piles. Because the material comes from so many sources, our impact crusher helps us process large amounts of RAP while still knowing the gradation and AC content via test samples. With this machine we have a lot more consistency than we did prior." To upgrade RAP production, Tri- County acquired a mobile impact crusher that replaced a rented crusher/screen and a small in-line crusher mounted in the recycle system. "We had problems with that small crusher," Royer said. "It was wearing out and would plug up on us. We did a lot of mainte- nance on it." In addition to that small in-line RAP pugmill, Tri-County had the rented crusher/screen brought in to pre-crush RAP in advance of that in-line crusher. "We'd rent a crusher/screen to process RAP, but we'd still have to run RAP through the in-line crusher," Royer said. "That was an added cost." "The impactor saves us a lot of labor," said Rick Vernal, presi- dent, Tri-County Asphalt Mate- rials. "Now, we have one guy feeding one piece of equipment, and the same guy pulling out a finished product. We're only handling the product once. That compares to before, where we'd have two to three guys. They'd run RAP through the rented crusher, then through the screen, then through the crusher and back through a final screen. It was a lot more work." The new impactor gives more flexibility in feed sizes, Royer said. "It lets us accept blacktop drive- way tear-outs of all sizes," he said. "In the past we were limited to 6-inch-diameter down. The in-line crusher was good only up to 20 tons per hour, and when material was damp it would tend to plug up. Rubber or crack sealants in the feed also would bind it up," Royer said. The final product out of the crusher is a minus 9/16-inch top size, down to dust, while the pre- screen removes a little bit bigger material, a minus 3/4-inch down to dust. "That it's prescreened means we don't have to send all the fines through the crusher," Royer said. "Basically we filter or screen out the fines beforehand. Once every- thing goes through the crusher and passes the screens, the RAP will be 9/16 down to dust. Eventually the 3/4-inch will be run through the plant and crushed to 9/16-minus size. We use the 9/16-inch in every mix we make." FAST, ACCURATE and CONSISTENT! Truck Mounted Custom Sizes 800-843-8731 www.stoltzmfg.com Accurately Spreads All Dry Binding Agents Pull-Type Leader In Low-Dust Application of Soil Stabilization Materials 8-27 Tons Manual or Automatic Rate Control with the Stoltz Controller Spread Rates Up To 120 lb/sq .yd. BaileyBridge_BR0513_PG14.indd 1 4/23/13 9:32 AM