THE MICRO-DEVAL TEST

L'ESSAI MICRO-DEVAL

An account is given of the development of the micro-Deval test used to measure the frictional resistance of materials of the type used for road construction. The limitations of the original Deval test on which the method is based are outlined. Test samples of 500g are examined in a steel cylinder with a load made up of 10mm diameter steel balls. The mechanism of the equipment is described and the parameters of the test discussed. Results from three laboratories carrying out the same test are compared and the degree of variation established. Less dispersion is found than with the Deval test. A further comparison between Deval and micro-Deval techniques shows a good correlation in results but several advantages of the micro-Deval method including shorter testing time and application to a wider range of grades. The effect of water on both tests is also investigated. This paper was originally published in French in Bulletin de Liaison des Laboratoire des Ponts et Chaussees (1971) No 54, pp69-76. (TRRL)

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Tourenq, C
  • Publication Date: 1990-6

Language

  • English

Media Info

  • Features: References;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00612446
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: T 3656
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM