GENERAL HIGHWAY MATTERS - BELGIUM

A REVIEW IS PRESENTED OF RESULTS OBTAINED FROM RESEARCH FOR THE PERFECTING OF AN OBJECTIVE METHOD FOR THE DIMENSIONING OF HIGHWAYS. THE MULTI-LAYER ELASTIC AND VISCO- ELASTIC SYSTEMS ARE STUDIED. THE THEORETICAL AND EXPERIMENTAL RESULTS (PHOTOELASTICITY) OBTAINED, ALTHOUGH RESTING ON THE SIMPLIFIED HYPOTHESIS OF WORK (ELASTICITY AND LINEAR VISCOELASTICITY) PERMIT BETTER UNDERSTANDING OF THE MECHANICAL BEHAVIOR OF MULTI-LAYER SYSTEMS SUBMITTED TO THE ACTION OF EXTERNAL FORCES. THE PHYSICAL AND MECHANICAL PROPERTIES OF HIGHWAY MATERIALS ARE INFLUENCED BY SEASONAL CONDITIONS OF THESE PROPERTIES. THE STUDY OF EXPERIMENTAL HIGHWAYS HAS PERMITTED THE COMPARISON OF THE QUALITIES OF THE MATERIALS IN THE DIFFERENT FOUNDATIONS (STONE, COATED MATERIALS). THE STUDY ON EXPERIMENTAL HIGHWAYS ALSO PERMITTED ESTABLISHMENT OF CONCRETE SLABS AND OF AN EMPIRICAL FORMULA ON THE INFLUENCE OF THE NUMBER OF PASSAGES OF VEHICLES. RESEARCH HAS CONTRIBUTED THE COEFFICIENT OF FRICTION OR RUGOSITY AS A FUNCTION OF CERTAIN FACTORS: THE SPEED OF THE TEST WITH THE AGE OF THE SURFACINGS. A GOOD CORRELATION EXISTS BETWEEN THE PERCENTAGE OF VOIDS OF BITUMINOUS MACADAMS AND THE DARCY COEFFICIENT OF PERMEABILITY K IN CM/SEC. A METHOD OF MEASUREMENT IN SITU OF THE SPEED OF PERCOLATION HAS BEEN PERFECTED.

• Supplemental Notes:
  • No 1-2, pp 3-22, 3 FIG, 2 TAB
• Authors:
  • de Henau, A
  • Persoons, J
  • Reichert, J
  • Romain, J
  • Verstraeten, J
• Publication Date: 1967

Media Info

• Serial:
  • Perm Intl Assoc Road Congresses Proc
  • Publisher: Xiiith Congress, Tokyo

Subject/Index Terms

• TRT Terms: Bituminous macadam; Building materials; Coefficient of friction; Concrete pavements; Elasticity (Mechanics); Experimental roads; Mathematical analysis; Mechanical properties; Motion; Motor vehicles; Pavement design; Pavements; Percolation; Permeability coefficient; Photoelasticity; Physical properties; Reviews; Seasons; Smoothness; Surfacing; Traffic volume; Viscoelastic materials; Viscoelasticity; Void ratios
• Uncontrolled Terms: Moving vehicles; Seasonal variations
• Old TRIS Terms: Aging; Layered system mechanics; Pavement smoothness; Percolation rate; Void
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00205518
• Record Type: Publication
• Files: TRIS
• Created Date: May 24 1994 12:00AM