ESTIMATION OF PAVEMENT LAYER THICKNESS VARIABILITY FOR RELIABILITY-BASED DESIGN

Estimating the variability of key pavement design inputs is essential to reliability-based pavement design. The thickness of most pavement layers has a great impact on the outcome of practically all analyses of pavement performance. The within-section layer thickness variability is investigated here, as is the extent of the mean layer thickness deviation from its design thickness. Pavement layer thickness data (elevation and core measurements) from a large number of newly constructed flexible and rigid pavement sections in the Long-Term Pavement Performance (LTPP) program were examined. To determine the distribution type of the thickness data, a combined statistical test for skewness and kurtosis showed that (a) thickness variations within a layer indicate a normal distribution for 86% of 1,034 layers and (b) the mean thickness deviations from the design values may be assumed to be normally distributed for a layer having a given type and design thickness. The estimated thickness-within-layer variability values and the estimated typical thickness deviations derived from LTPP data may serve as benchmarks for use in pavement design reliability, construction quality assurance specifications, and other research studies. In addition, statistical comparisons of layer thickness variability indicators were made between the elevation and core layer thickness data to determine whether there are systematic differences between these two measuring methods. These results will be very useful to both researchers and practitioners who develop or use reliability-based pavement design procedures.

• Record URL:
  https://doi.org/10.3141/1849-17
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=ESTIMATION+OF+PAVEMENT+LAYER+THICKNESS+VARIABILITY+FOR+RELIABILITY-BASED+DESIGN&author=Y.+Jiang&author=O.+Selezneva&author=G.+Mladenovic&author=S.+Aref&author=M.+Darter&publication_year=2003
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/153508.aspx
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1849, Soil Mechanics 2003.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Jiang, Yong
  • Selezneva, O
  • Mladenovic, G
  • Aref, S
  • Darter, M
• Publication Date: 2003

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 156-165
• Serial:
  • Transportation Research Record
  • Issue Number: 1849
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Estimating; Flexible pavements; Normal distributions; Pavement design; Pavement layers; Rigid pavements; Thickness; Variables
• Identifier Terms: Long-Term Pavement Performance Program
• Uncontrolled Terms: Reliability-based design
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00965616
• Record Type: Publication
• ISBN: 0309085845
• Files: TRIS, TRB, ATRI
• Created Date: Nov 21 2003 12:00AM