In-Place Determination of Stiffness of Subsurface Reclaimed Layers in Thin Surface Hot-Mix Asphalt Pavements: Fast Nondestructive Test and Analysis Method

Seismic testing and analysis using a nondestructive method was developed to determine the moduli of reclaimed layers in thin surface hot-mix asphalt pavements. This method is particularly useful when accurate backcalculation of moduli is difficult because of the existence of unknown layers and when the extraction of intact cores for laboratory testing is impossible. Sixteen Maine Department of Transportation projects with foamed asphalt and plant-mixed recycled asphalt pavement reclaimed layers were tested according to this method using a portable seismic property analyzer. Layer thickness uniformity was checked with a ground-penetrating radar, and falling weight deflectometer was used at multiple load levels to acquire deflection data. Seismic test data were analyzed to estimate layer moduli. The collected data were found to have very low variability. The deflections calculated with the predicted moduli and actual deflections were found to compare well, and the use of predicted moduli as seed moduli resulted in backcalculations with relatively low root-mean-square errors. The moduli were corrected for temperature, and design moduli were recommended. This newly developed method can be used effectively to determine the moduli of subsurface layers, and its use is important for collecting a large amount of data, specifically because of the highly variable nature of the reclaimed layers. A logical next step will be to develop artificial neural networks to automate the process of data reduction from seismic testing. This would allow departments of transportation and industry to fully use the benefits of this fast, nondestructive testing method.

• Record URL:
  • https://doi.org/10.3141/1949-02
• 
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=In-Place+Determination+of+Stiffness+of+Subsurface+Reclaimed+Layers+in+Thin+Surface+Hot-Mix+Asphalt+Pavements%3a+Fast+Nondestructive+Test+and+Analysis+Method&author=R.+Mallick&author=J.+Bradley&author=S.+Nazarian&publication_year=2006
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309099587
• Authors:
  • Mallick, Rajib B
  • Bradley, Julie E
  • Nazarian, Soheil
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 11-19
• Monograph Title: Pavement Rehabilitation, Strength and Deformation Characteristics, and Surface Properties–Vehicle Interaction 2006
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1949
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt pavements; Backcalculation; Data collection; Falling weight deflectometers; Foamed asphalt; Ground penetrating radar; Hot mix asphalt; Modulus of elasticity; Nondestructive tests; Pavement design; Stiffness; Subbase (Pavements)
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01025700
• Record Type: Publication
• ISBN: 0309099587
• Files: TRIS, TRB, ATRI
• Created Date: Jun 8 2006 11:26AM