STRAIN MEASUREMENTS IN BITUMINOUS LAYERS. SIXTH INTERNATIONAL CONFERENCE, STRUCTURAL DESIGN OF ASPHALT PAVEMENTS, VOLUME I, PROCEEDINGS, UNIVERSITY OF MICHIGAN, JULY 13-17, 1987, ANN ARBOR, MICHIGAN

An international expert group on "full scale pavement tests", created by OECD in 1983 with the task to improve the use and benefits from accelerated load tests through international cooperation, carried out a joint program of strain measurements on the Italian test facility of Nardo in April 1984. The comparison of the results from various types of instrumentation used to measure strain in asphalt layers was intended to give an answer to the question whether it is possible to consider in an equivalent way strain values obtained through different techniques and finally also the conclusions of tests based on such results of strain measurements. Nine groups of researchers and technicians from 8 different countries participated in the common field experiment, placing their instrumentation in a special test section and carrying out simultaneous readings under the same transient loads. The sum of the results obtained in the course of 3 days by all the participants have been analyzed together with all the boundary conditions for the test. It was found that a major part of the dispersion in the results was due to variations in the test conditions, i.e. homogeneity of the test pavement structure, temperature, speed and exact position of the load. The different types of instrumentation used also showed a certain amount of scatter. However, a detailed analysis indicates that certain solutions are less subject to additional influencing factors such as stiffness of the gauge, method of preparation and placement, use of asphalt materials prepared in the laboratory. Knowledge of all gauge characteristics is thus an important factor in the estimation of its reliability and of the value of the results obtained.

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Civil Engineering
  Ann Arbor, MI  United States  48109
• Authors:
  • SCAZZIGA, I F
  • DUMONT, A G
  • KNOBEL, W
• Publication Date: 1987

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 574-589
• Serial:
  • Publication of: Michigan University, Ann Arbor
  • Publisher: University of Michigan, Ann Arbor

Subject/Index Terms

• TRT Terms: Accelerated tests; Alternatives analysis; Asphalt pavements; Conferences; Instrumentation; Pavement layers; Reliability; Strain measurement; Test procedures; Variables
• Old TRIS Terms: Test results; Variations
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00485625
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1989 12:00AM