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Application of a Materials-Related Distress Rating System for Portland Cement Concrete Airfield Pavements. Presented to the FAA Technology Transfer Conference Atlantic City, New Jersey April 20 to 22, 2010. David Peshkin, P.E. Acknowledgments. Applied Pavement Technology, Inc. Co-Authors
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Application of a Materials-Related Distress Rating System for Portland Cement Concrete Airfield Pavements Presented to the FAA Technology Transfer Conference Atlantic City, New Jersey April 20 to 22, 2010 David Peshkin, P.E.
Acknowledgments Applied Pavement Technology, Inc. Co-Authors • Tom Van Dam • Jim Bruinsma
Background • Properly designed and constructed PCC generate expected M&R deterioration patterns • Early, a pavement may lose 1 to 2 PCI points/year; later, perhaps 2 to 4 • Deterioration of PCC pavements with MRD is extremely variable • M&R options for MRD-affected pavements are different and may not be appropriate for same period
Background (continued) • In 2009, APTech performed a project-level evaluation of a PCC feature with MRD • Evaluation included PCI, MRDR, limited petrographic, and FWD testing • Goal was to develop an M&R plan
PCI Evaluation • PCI performed at project level • MRD survey procedure triggered by specific distresses
PCI Results • Area-weighted PCI = 80 • Overall good condition
PCI Distresses • Corner Break (L, M) • Linear Cracking (L, M) • Durability Cracking (L, M, H) • Joint Seal Damage (M) • Popouts • Small Patch (L, M, H) • Large Patch (L, M) • Map Cracking (M) • Pumping • Shrinkage Cracking • Joint Spall (L, M, H) • Corner Spall (L, M, H)
Deterioration (PCI) • Critical PCI of 65 reached in 8 more years
Primary MRD Indicators • Parallel cracking • Perpendicular cracking • Honeycombing • Popouts • Patching • Staining
Perpendicular and Parallel Cracking (L), Discoloration and Staining
Perpendicular and Parallel Cracking (M), Discoloration and Staining
Petrographic Examination • Coarse aggregate is limestone and dolomitic limestone • Fine aggregate is siliceous material (quartz and feldspar) • All PCC includes Class C fly ash • ASR identified in all cores • Micro-cracking and gel are localized
Lessons Learned PCI indicates generally good conditions MRDR indicates one section already requires significant rehabilitation, and two others will require rehabilitation within several years In this instance, MRDR is better suited to assess FOD risk and plan for future M&R
Thank You! David Peshkin Applied Pavement Technology, Inc. www.appliedpavement.com 217.398.3977 dpeshkin@appliedpavement.com