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Intelligent Compaction Research & Development and QA Activities Richard B. Duval, P.E. Construction Research Engineer Infrastructure Research & Development

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Intelligent Compaction Research and Development Activities FHWA Final Report Accelerated Implementation of Intelligent Compaction Technology for Embankment Subgrade Soils, Aggregate Base, and Asphalt Pavement Materials Publication No. FHWA-IF-12-002 http://www.fhwa.dot.gov/pavement/ic/pubs/hif12002.pdf Iowa State Research Sponsor(s) Federal Highway Administration Transportation Pooled Fund (TPF- 5(233), State DOT Partners: CA, GA, IA, KY, MO, MS, OH, PA, UT, VA, WI, Iowa Department of Transportation http://www.ctre.iastate.edu/research/detail.cfm?projectID=-598919230

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CURRENT RESEARCH: Intelligent Compaction Quality Assurance for In-Place Density Acceptance. Objective: Correlate Intelligent Compaction roller machine values (RMVs) to in-place density on HMA paving projects to determine how RMVs can be used to reduce/replace density testing. Field work is scheduled to begin during 2012 paving season. Soliciting possible field projects for a total of nine projects through 2014. Intelligent Compaction Research and Development Activities

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CURRENT RESEARCH continued: NCHRP 20-05 Topic 44-10 Synthesis - Non-nuclear Methods for Compaction Control of Unbound Materials Intelligent Construction Systems and Technologies Research Project Civil Information Management Intelligent Compaction Research and Development Activities

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Recommendations for Future Research From Publication FHWA-IF-12-002 An improved (or even better, universal) intelligent compaction measurement values (ICMV) model is recommended to decouple 5 stiffness for each pavement layer, so that correlation of ICMV and in- situ spot measurements can be improved. Intelligent Compaction Research and Development Activities

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Recommendations for Future Research, continued For soil/subbase compaction, real time moisture mapping is recommended and an improved ICMV model would be needed to account for the effect of moisture. Intelligent Compaction Research and Development Activities

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Recommendations for Future Research, continued For HMA compaction, an improved ICMV model is recommended to account for HMA temperatures, and ICMVs are recommended to be reported with respect to a reference temperature (e.g., 68 F). Intelligent Compaction Research and Development Activities

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Recommendations for Future Research, continued Multivariate technique is recommended to characterize each vendors ICMV in order to better understand the effects of machines and operation settings. Intelligent Compaction Research and Development Activities

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Recommendations for Future Research, continued A standardized IC data management and analysis tool is recommended to help speed up the acceptance of IC technologies by agencies. Long term pavement performance monitoring is recommended in order to identify performance trends that may relate to ICMV values and uniformity metrics. Intelligent Compaction Research and Development Activities

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Intelligent Compaction QA Activities QUALITY CONTROL PLAN HMA, Base, and Soils - The Contractor shall prepare and submit a written Quality Control Plan (QCP) for the project. As a minimum, the QCP shall contain the following information: AASHTO /ASTM /DOT Standard for Compaction Qualified QC Technicians Material Sampling and Testing Testing Facility Inspection

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Intelligent Compaction QA Activities QUALITY CONTROL PLAN HMA, Base, and Soils - In addition for IC: IC Roller operator qualifications Test Section Minimum Roller Frequency Settings (SHA needs for their soils/bases/asphalts) GPS Check Testing Mapping Verification Response to Test Results Documentation