01661909

Component

https://doi.org/10.1177/0361198118794068

https://doi.org/10.1177/0361198118794068

The compaction of asphalt concrete significantly affects long-term pavement performance. Although coring provides a relatively accurate way of assessing in-place density at specific locations, the coverage of the assessment is limited, especially at longitudinal joint locations. This can be particularly problematic because it is difficult to identify problematic locations that are likely to fail prematurely using current compaction assessment methods. Ground penetrating radar (GPR) provides an attractive nondestructive testing alternative for evaluation of compaction quality, especially with recent significant improvements in the GPR technology for this specific application. However, assessment of the air void content of the asphalt mix from the GPR-measured dielectric constant of the surface requires conversion of dielectric variation to air void content variation, which is the subject of this paper. An alternative to the commonly used model is proposed, leading to more justifiable predictions for low values of dielectric constants. The proposed model was used to interpret data from a 7-mi long asphalt overlay construction project. The results of the interpretation as compared with the results obtained with the conventional model show an improvement on the stability of the prediction at low air void contents, especially when core calibration data are limited and uncertainty is considered. These results are promising in the direction of reducing field cores necessary to have a stable model providing continuous compaction assessment of new asphalt pavement construction.

18-06229

English

pp 144-154

2018

Transportation Research Record: Journal of the Transportation Research Board

Print

Figures (8) ; References (32) ; Tables (2)

Air voids; Asphalt concrete; Bituminous overlays; Compaction; Dielectric properties; Ground penetrating radar; Mathematical models; Nondestructive tests; Paving; Quality control

Air void content

Construction; Highways; Materials; Pavements

TRIS, TRB, ATRI

Jan 8 2018 11:36AM

• A Decision Support Framework for Assessing the Contextual Factors for Complex Highway Projects
• Design, Fabrication, Construction, and Cost Assessment of Virginia’s First Corrosion Resistant ASTM A1010 Plate Girder Bridge
• Development of an Automated Remote Asphalt Paving Quality Control System
• Effective Post-Construction Evaluation Practices for Work Zone Management Strategies
• Effects of Mineral Additives on Cold Recycled Foamed Asphalt Mixtures Cured in Laboratory and Field Conditions
• Effects of Reheating Procedure and Oven Type on Performance Testing Results of Asphalt Mixtures
• Evaluation of Mix Designs for Rapid Construction of Bonded Concrete Overlays on Asphalt
• Feasibility of using QR Codes in Highway Construction Document Management
• First Application of UHPC Bridge Deck Overlay in North America
• Leveraging Intelligent Compaction and Thermal Profiling Technologies to Improve Asphalt Pavement Construction Quality: A Case Study
• Life-Cycle Cost Adjustment Factors in Alternate Design/Alternative Bid Pavement Bids: Added Value or Added Controversy?
• Managing Public Communication Strategies in Accelerated Highway Construction Projects
• Risk-Based Prioritization of Construction Inspection
• The FHWA’s Demonstration Project for Enhanced Durability of Asphalt Pavements through Increased In-Place Pavement Density
• Timing of Cost Certainty in Highway Construction Project Delivery: Perceptions versus Empirical Results
• Unit Price or Lump Sum? A Stochastic Cost-Based Decision-Making Tool for Design-Bid-Build Projects