REVIEW OF THE DESIGN AND PERFORMANCE OF SANDWICHED PAVEMENTS. FINAL REPORT

The studies reported herein concern one of the basic pavement design types used by the Virginia Department of Transportation for many years. Known as a sandwiched pavement design, the pavement consists of a relatively weak aggregate base layer between a strong, asphaltic concrete upper layer and a strong cement-treated stone or cement-stabilized soil lower layer. Included in the studies were deflection analyses, performance evaluations, and the collection of aggregate base mechanical properties. The studies show that the sandwiched pavements generally do not perform as well as conventional pavements where layers grow successively weaker from the top to the bottom of the pavement. The life expectancy for sandwiched pavements was on the average two years shorter. Studies also showed that the deflection characteristics and therefore the performance of the sandwiched pavements is strongly influenced by the amount of minus 200 material in the aggregate base layer. A recommendation to management that the Department consider greater use of a graded aggregate base with no more than 8 percent minus 200 is included.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/19174
• Corporate Authors:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903

  Virginia Department of Highways

  Traffic and Planning Division, 1221 East Broad Street
  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • McGhee, K H
• Publication Date: 1987-12

Media Info

• Features: Figures; References; Tables;
• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates; Asphalt concrete; Base course (Pavements); Cement treated soils; Deflection; Mechanical properties; Pavement design; Pavement performance; Pavements; Sandwich construction; Service life; Soil cement
• Uncontrolled Terms: Cement treated bases
• Old TRIS Terms: Pavement deflection; Pavement life
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00465648
• Record Type: Publication
• Report/Paper Numbers: FHWA/VA-88/9, VTRC 88-R9
• Contract Numbers: 2378
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Feb 29 1988 12:00AM