Issue link: http://read.dmtmag.com/i/266311
HOT-MIX MAGAZINE 33 VOLUME 19 NUMBER 1 Asphalt producer and seller Kelterite Corporation in Downey, California, stockpiles RAP. a buildup of mud, and replacing blinded bags is expensive. "The V-Pack system has elimi- nated this problem," said Swanson. "The Astec system enables a plant to make both mixes, back to back, by changing drum speed to control veil density." Another key element in the Astec V-Pack System is the special geometry of the combustion zone flighting. The new system is using a unique combustion zone flighting that varies from Astec's traditional design," said Swanson. "The com- bustion zone flights are also made of stainless steel to withstand higher temperatures associated with using higher-RAP percent- ages." 100-PERCENT RAP The RAP King will be the Astec system using 100-percent RAP in mixes. It will be a hot oil tube- based dryer. Still a rotary dryer, but instead of having direct exposure to hot gases, the RAP is tumbled over a heating element inside the dryer, keeping the RAP in a nearly oxygen-free atmosphere. In summary, Swanson noted: "The need for more RAP usage in mixes is driving the Astec equipment evo- lution." FOR INFORMATION Contact Diane Hunt 423.867.4210 dhunt@astecinc.com Dillman builds tough equipment. Equipment that performs reliably for years. Equipment you can count on to produce high quality asphalt mix. Full plants. Single components. Individual parts. Dillman gets the job done 13609_Astec_HotMixV19N1.indd 33 2/18/14 11:25 AM