Accession Number:

AD0856136

Title:

An Experimental Evaluation of a New Approach to Concrete Overlay Design for Flexible Pavements.

Descriptive Note:

Technical note May 68-Jun 69,

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

• Nielsen, J. P.
• Katona, M. G.

Report Date:

1969-07-01

Pagination or Media Count:

50.0

Abstract:

The report is concerned with the design of concrete overlays for flexible pavements. The conventional Westergaard analysis for the design of concrete overlays is reviewed and its weaknesses are enumerated. A review of layered theory indicated that an elastic layered solid approach to overlay design would predict an overlay thickness thinner than that suggested by Westergaard and, thus it offers a dollar savings in construction costs without a loss in rated load capacity. A field test section consisting of overlays of different thicknesses was constructed and load tested to evaluate the appropriateness of the new theoretical approach and also to verify the assumed failure criterion. A limited strain concept was selected as the failure mode that is, the maximum tensile strain in the concrete at the overlay-pavement interface should be limited to a prescribed maximum value. Author

Descriptors:

• *PAVEMENTS
• *RUNWAYS
• PAVEMENTS
• CONCRETE
• FLEXIBLE STRUCTURES
• THICKNESS
• FLEXURAL STRENGTH
• LOADS(FORCES)
• CONSTRUCTION MATERIALS
• COSTS
• STRAIN(MECHANICS)
• CRACKS
• INSTRUMENTATION
• STRESSES
• ELASTIC PROPERTIES
• PERFORMANCE(ENGINEERING)
• COMPUTER PROGRAMMING

Subject Categories:

• Terminal Flight Facilities
• Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE