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Iowa DOT Developmental Specifications for Recycled Asphalt Shingles. Scott Schram, Ph.D., P.E. Iowa DOT Bituminous Engineer 5/26/2010. Outline. Background Specification Development Upcoming Projects. RAS Processing Models. RAS Processing Models. RAS Processing Models. - PowerPoint PPT Presentation
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BackgroundBackground Specification DevelopmentSpecification Development Upcoming ProjectsUpcoming Projects
DOT
DNR
OSHA
IDED
1.1. Source requirementsSource requirements2.2. Material requirementsMaterial requirements3.3. End User requirementsEnd User requirements
Raw Shingle MaterialRaw Shingle Material Pre-processing = sorting, removal of wastePre-processing = sorting, removal of waste Asbestos remediation (testing, rejection of Asbestos remediation (testing, rejection of
loads)loads) Processed RASProcessed RAS
GradationGradation Deleterious Content (<1.5%)Deleterious Content (<1.5%) Moisture (for information only)Moisture (for information only)
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