Intelligent compaction of asphalt pavement implementation.
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2015-03-01
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Abstract:The main purpose of this research is to determine the possibility of substituting in‐place core density (% Gmm) for Hot Mix Asphalt ; (HMA) Quality Assurance (QA) in Indiana Department of Transportation Specification with Intelligent Compaction (IC) measurements. A ; questionnaire survey and interviews were conducted to gather information on: (1) the usage of IC technology in other states, (2) the ; benefits of applying IC technology, and (3) the application of IC technology for Quality Control/ Quality Assurance (QC/QA). Also the data ; available from IC demonstration performed on US 52 in 2009 was analyzed to identify the relationship between in‐place density values ; (i.e., Non‐Nuclear Gauge, NNG) and the IC Measurement Values (ICMVs). ; According to survey responses from 26 agencies, there was no state DOT using IC for QA as of June 2014. Only two DOTs, ; including Alaska and Vermont have adopted IC in HMA compaction for QC. The reasons for not using IC technology in current QC/QA ; practices were: (1) satisfaction with existing QC/QA procedure, (2) difficulty of adjustment due to the lack of specifications in ; determining stiffness in HMA, and (3) lack of availability of IC equipment with contractors. However, it was responded that the most ; benefits of IC was night time paving and uniform compaction in QC. ; Analysis of the ICMV data obtained from a demonstration project on US 52 indicated that a NNG correlation showed an R2 ; value of 0.67. This finding supports the IC implementation in the current INDOT HMA QC. It should be noted that a correlation between ; core‐density and ICMV could not be determined due to lack of reliable data. ; In conclusion, the research could not identify any possibility of adding IC into the INDOT specification for QA based on the ; survey, phone interviews and analysis of the data obtained from IC demonstration on US 52.
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Main Document Checksum:urn:sha256:3449b986a1409d84c45c3528a09ad5af907972c6ffc86341fc1e739b54252b17