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Screened and ReadyThe ProSizer’s three-deck screening systemprovides versatility for today’s aggregate market.In today’s market and economics, all projects are a challengefor contractors, with competing suppliers (aggregate andasphalt binders) each project seems to be unique. Multiplesources are blended to utilize the most cost effective advantageavailable and that seems to change with each project.In 2008, RK Hall utilized approximately 200,000 tons of FRAP(fractionated reclaimed asphalt pavement) and expects 2010 tobe the same; all will be processed either with its stationary inTexarkana or with its portable Astec Mobile Screens’ ProSizer.“We are reclaiming asphalt at every opportunity available andstockpiling it according to the nominal aggregate size and theasphalt binder grade,” says Brad Bankston, RK Hall operationsmanager. “This separation requires stockpile room, but theadvantages certainly outweigh the burden.ELIMINATES OVER CRUSHINGThis allows the FRAP to be processed and sized with little to nocrushing of the RAP aggregate. The screens can be changed toaccommodate the aggregate size, this eliminates over crushing,and helps control the wear on the crusher units.Currently, RK Hall is utilizing 3 to 5 percent shingles—bothmanufactured waste as well as tear-offs. The new stationaryProSizer 3612V is located at its Texarkana plant. This plantproduces mix for three states because of its geographicallocation.“Each state has its own unique requirements, so we need to beversatile with the product,” says Bankston. “The ProSizer allowsthis versatility with the three-deck screening system.”MEETING CUSTOMER NEEDSWith the implementation of the new TxDot specificationsallowing the use of RAP, RAS (reclaimed asphalt shingles), andsubstitute binder grades to achieve the end performance, thecriteria has been extremely challenging. According to Bankston,one must understand the quality and components of theavailable RAP and RAS, and how the combination will perform.“First, we must provide our customer with a quality product thatwill meet spec and perform; we then have to be as economicalas possible to stay competitive,” says Bankston. “The key tosuccess is to maintain a very well trained and informed QCQA28 volume 3, number 1 | Today’s aggregate & mining solutions
ProSizer ® 3612VHigh Frequency ScreenAstec Mobile Screens continues to leadinnovations with the introduction of theProSizer 3612V to the marketplace. This highfrequency screen is the complete solutionfor processing FRAP millings for the asphaltproducer. This closed circuit mobile plantincorporates a double deck PEP Vari-Vibe ®high frequency screen with a horizontal shaftimpactor (HSI) crusher. The quick set up timeof less than 15 minutes allows the producer tomove around to multiple jobsites and processRAP back to its original size. This up-timeallows for increased RAP usage, while addingflexibility and improved control in mix designs.RK Hall utilizes the ProSizer 3612V in itsoperations in Texarkana due to its versatility.“Our typical sizes vary from over ½-inch toquarter, and from quarter to zero,” says RKHall Quality Control Manager Brad Bradford.“If we’re running a base design, we canfractionate aggregate from ½-inch-plus downinto finer materials as needed.”department; today’s market requires continualimplementation of new technology.”SCREENING FORWARDFor 2010, RK Hall plans to remain a leaderin the industry by striving to provide itscustomers with the highest quality productat the most economical price, while beingenvironmentally friendly. This will beachieved by utilizing the available recyclableresources and continually monitoring thequality.“Astec Mobile Screens is a leadingresource of modern technology availableto the contractor to meet this goal,” saysBankston. ■Wantmore?For more information on the advantages of the ProSizer and how to be FRAP Ready, contactAstec Mobile Screens’ Product Development Manager Patrick Reaver at 800.545.2125, e-mailpreaver@astecmobilescreens.com, or visit www.astecmobilescreens.com.Today’s aggregate & mining solutions | volume 3, number 1 29
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Page 7 and 8: emphasis on being physically closer
Page 10: News-DevelopmentsICMM RELEASES NEW
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Page 24 and 25: Conquering Dustin LimestoneCrushing
Page 26 and 27: Construction materials companymeets
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Page 33: Based in Elandsfontein,Johannesburg
Page 36 and 37: Key Issue for theExtractive Industr
Page 38 and 39: Bauma 2010Marked a Turnaroundfor th
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