BASIS OF A METHOD FOR THE DETERMINATION OF THE E MODULUS OF ROAD CONSTRUCTION MATERIALS

GRUNDZUEGE EINES VERFAHRENS ZUR BESTIMMUNG DES E-MODULS VON STRASSENBAUSTOFFEN

The author treats the problem by describing the free vibrations of a mass on the pavement theoretically, and by carrying out experiments such that the e modulus of the subgrade can be calculated. The amount of damping is determined from the equations for the natural frequency, the spring constant, damping factor and system mass, and hence a formula for the calculation of the e modulus can be derived. It is possible to determine Poisson's ratio for the subgrade by the relatively simple experimental determination of the amount of damping. In conclusion there is a description of possibilities for experimental methods and an illustration of the principle for testing pavements and subsoils or samples in the laboratory. A method developed which requires only one variable parameter to be measured (frequency) is described as a suitable test for laboratory and insitu measurements. (TRRL)

• Corporate Authors:

  Transpress VEB Verlag fuer Verkehrswesen

  Franzoesische Strasse 13/14, Postfach 1235
  108 Berlin,   Germany 
• Authors:
  • Ehrler, C
• Publication Date: 1978-4

Language

• German

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 115-117
• Serial:
  • Strasse
  • Volume: 18
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Building materials; Calculation; Coefficient of subgrade reaction; Damping (Physics); Equations; Frequency (Electromagnetism); Mathematical models; Measurement; Modulus of elasticity; Natural frequency; Pavements; Paving; Poisson ratio; Subgrade (Pavements); Vibration
• Old TRIS Terms: Poissons ratio
• ITRD Terms: 6464: Calculation; 6997: Frequency; 6473: Mathematical model; 6136: Measurement; 5919: Modulus of elasticity; 2955: Pavement; 2950: Subgrade; 5558: Vibration
• Subject Areas: Construction; Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 00315163
• Record Type: Publication
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• Files: ITRD, TRIS
• Created Date: Feb 6 1981 12:00AM