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)
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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
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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