2013 Session: 235

• Verification of Performance-Related Specifications for Superpave Pavements
  Abstract: Statistical specifications for highway construction provide the means to measure the important quality control attributes and ensure their compliance. The pay adjustments, part of these specifications, reflect the amount of deduction or bonus and the optimized risk distributed between the owner and the contractor. The Kansas Department of Transportation (KDOT) has built a comprehensive database of as-constructed material properties for Superpave pavements from the tests required in the Quality Control/Quality Assurance (QC/QA) program. Currently, KDOT pays incentives/disincentives for mixture air voids and in-place density of Superpave pavements. A practical performance model and composite index that included air voids, in-place density, asphalt content, and voids in mineral aggregate have been developed from an analysis of KDOT Superpave mixture QC/QA database to fully account for the factors that affect the performance of Superpave pavements. In this study, the practical performance, composite index, and pay adjustment models were verified. Two superpave mixes with 25% Reclaimed Asphalt Pavement (RAP) were compacted using gyratory compactor at different asphalt contents. The corresponding volumetric properties were computed. Percent within limits (PWLs) were calculated for all quality characteristics. Expected life, composite index, and pay adjustment values calculated from the previously developed models based on PWLs for the different quality characteristics show the reasonableness of the models. The expected life model developed with air voids, VMA, asphalt content, and in-place density predicted expected life from a maximum of 11.4 years for good quality and an expected life of 2.6 years for poor quality for pavements with a 12.5 mm Nominal Maximum Aggregate Size Superpave mixture. It is believed that the models will be more robust when more Superpave mixes (coarse mixes and mixes without RAP) are used and then correlated with actual field data.
  Authors: Gedafa, Daba Shabara; Uppu, Kiran Kumar; Hossain, Mustaque; Ingram, Lon; Kreider, Rick
  Authors: Gedafa, Daba Shabara; Uppu, Kiran Kumar; Hossain, Mustaque; Ingram, Lon; Kreider, Rick
  Year: 2013
  Document Type: Paper
  Subject: Construction
  Session: 235
  Paper Number: 13-0668
• Automation of Asphalt Truck Delivery Ticket Using Barcode Technology
  Abstract: The Louisiana Department of Transportation and Development (LADOTD) is currently in the process of implementing an automated material tracking system; however, users will still need to manually enter material delivery tickets. This study investigated the potential of an automated material delivery system through the use of barcode technology. Custom barcode generating software was developed to create barcode labels to attach to asphalt truck delivery tickets. Custom software was also developed for a handheld barcode scanner to read the barcodes in the field at the time of delivery, store the information in a structured database, and provide the roadway operator with real time information. The automated material delivery process was trialed on two construction projects with great success. The final report generated included all required information from the asphalt truck ticket in addition to other values such as truck times, yield/distance comparisons, comments from the roadway operator, and a means of tracking between the plant and the roadway. Automation of material delivery is possible; however, the success of the process will require the cooperation of multiple entities.
  Authors: Icenogle, Patrick; Kabir, Md Sharear; King, William; Abadie, Christopher David
  Authors: Icenogle, Patrick; Kabir, Md Sharear; King, William; Abadie, Christopher David
  Year: 2013
  Document Type: Paper
  Subject: Construction
  Session: 235
  Paper Number: 13-0720
• Selection of Project Quality Assurance Organization for Highway Design and Construction Projects
  Abstract: The assignment of project quality roles and responsibilities in the highway industry makes up a project quality assurance organization (QAO). Historically all project quality roles and responsibilities have been assigned to the state highway agency (SHA), an accepted and well-understood practice in the industry. However, increasing use of alternative project delivery methods and reductions in SHA staffing are having an impact on traditional QAO practices. In response, SHAs are increasingly selecting QAOs in an informal manner due to time constraints, limited staff knowledge and experience, and a lack of guidance from the research community. Most highway quality research focuses on inspections, observations, corporate quality, warranties, and materials testing, resulting in a gap in the research about shifts in roles and responsibilities in project QAOs. This research begins to bridge this gap by investigating and identifying fundamental QAOs in the industry, identifying factors that influence the selection of QAOs, exploring relationships between QAOs and selection factors, and presenting a systematic process to assist SHAs in selecting QAOs. The process presented here provides a consistent, efficient, justifiable, and defensible approach for selecting project QAOs. The QAO selection process also provides SHAs with opportunities for identifying, discussing, and understanding potential impacts of different QAOs on different projects.
  Authors: Kraft, Elizabeth; Molenaar, Keith R.
  Authors: Kraft, Elizabeth; Molenaar, Keith R.
  Year: 2013
  Document Type: Paper
  Subject: Construction
  Session: 235
  Paper Number: 13-2394
• Verification of Performance-Related Specifications for Superpave Pavements
  Authors: Gedafa, Daba
  Authors: Gedafa, Daba
  Year: 2013
  Document Type: Presentation; Poster
  Subject: Construction
  Session: 235
  Paper Number: 13-0668
• Automation of Asphalt Truck Delivery Ticket Using Barcode Technology
  Authors: Icenogle, Patrick
  Authors: Icenogle, Patrick
  Year: 2013
  Document Type: Presentation; Poster
  Subject: Construction
  Session: 235
  Paper Number: 13-0720