DCP AND FWD DATA FOR REHABILITATION DESIGN: PROBLEMS AND SOLUTIONS
The factors needing to be taken into account during the evaluation of the traffic carrying capacity of a road using falling weight deflectometer (FWD) and dynamic cone penetrometer (DCP) data are discussed. The use of the Structural Number to evaluate the 'strength' of pavements of similar type in terms of their likely traffic carrying capacity may give rise to a number of practical difficulties, especially on roads that have been in existence for many years.The nature of these difficulties is described. Some typical pavements and their adjusted Structural Number/deflection characteristics are discussed. It is considered that neither deflection values alone nor DCP-measured Structural Numbers can provide a true picture of the structural characteristics of pavement layers as far as their likely performance is concerned.
- ROLT, J
- Publication Date: 2004
- Pagination: 7 p.
- TRL STAFF PAPERS
- Publisher: TRL
- TRT Terms: Cone penetrometers; Deflection; Dynamic penetration test; Falling weight deflectometers; Nondestructive tests; Pavement design; Pavements; Test procedures
- ITRD Terms: 6178: Cone penetrometer; 5586: Deflection; 6187: Deflectograph; 6296: Dynamic penetration test; 6216: Non destructive testing; 2955: Pavement; 3055: Pavement design; 6288: Test method
- Subject Areas: Highways; Pavements;
- Accession Number: 00988450
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Apr 4 2005 12:00AM