THE FACTORS WHICH INFLUENCE THE MEASUREMENT OF DEFLECTIONS WITH THE BENKELMAN BEAM

CONSIDERACIONES EN TORNO A LOS FACTORES QUE AFECTAN A LA MEDIDA DE LAS DEFLEXIONES CON VIGA BENKELMAN

This study deals with the possibility of variations in the data obtained at different times of the year on the highways under the control of the Ninth Regional Highway Authority, based in valladolid, with the aim of making comparisons. This has been done by taking test sections, 1 km in length, chosen on the basis of a series of factors, such as the climate of the region, the characteristics of the subgrade and the average daily traffic of the various sections of the highway. The nondestructive testing of the pavement is carried out with the Benkelman beam; each 100 M, the air temperature is measured as well as the temperature of the pavement, the moisture content and the in-situ density of the material at the side of the pavement. The seasonal variations which produce the same deflections from January to May have been observed. A linear relationship between the extreme values of the deflections and the loss of bearing capacity (californian bearing ratio) has also been studied. /TRRL/

• Corporate Authors:

  Materials Division, Ministry of Public Works

  Nuevas Ministerios
  Madrid-3,   Spain 
• Authors:
  • Escudero, P
• Publication Date: 1975-1

Language

• Spanish

Media Info

• Features: Figures;
• Pagination: p. 61-70
• Serial:
  • Materiales
  • Issue Number: 8

Subject/Index Terms

• TRT Terms: Bearing capacity; Benkelman beam; California bearing ratio; Climate; Deflection; Deflectographs; Nondestructive tests; Pavements; Sampling; Strength of materials; Structural strengthening; Temperature
• Old TRIS Terms: Pavement deflection
• ITRD Terms: 6105: Benkelman beam; 3087: California bearing ratio; 6187: Deflectograph; 2955: Pavement; 3096: Strengthening (pavement); 6722: Temperature
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00165674
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 3 1978 12:00AM