PAVEMENT DEFLECTION TESTING USING THE BENKELMAN BEAM
The Benkelman Beam equipment is described, the method of test is outlined, and comments are made on design deflection, deflection reporting, and the application of deflection testing. The Benkelman Beam used here was a movable beam or probe attached through a fulcrum to a fixed ball which rests on the pavement surface. The apparatus is placed on the road surface so that the extreme and or tip of the prode rests on the pavement surface at the spot where the deflection is to be measured and remains in contact with the pavement surface. Movement of the tip of the probe is measured by a dial guage which is in contact with the other end of the probe. The fulcrum of the probe is at a point one third of the distance between the tip and dial gauge so that the movement recorded by the dial gauge is one half of the pavement deflection. General comments are made on residual deflections, the effect of temperature, and of moisture on deflection; cement stabilization; and trafficking.
Victoria Country Roads Board, Australia60 Denmark Street
Kew F4, Victoria 3101, Australia
- Publication Date: 1975-8-12
- Features: Figures; References;
- Pagination: 14 p.
- TRT Terms: Benkelman beam; Cement treated soils; Deflection; Moisture content; Pavements; Soil cement; Temperature; Testing; Testing equipment
- Old TRIS Terms: Pavement deflection
- Subject Areas: Geotechnology; Highways; Pavements;
- Accession Number: 00153003
- Record Type: Publication
- Report/Paper Numbers: Tech. Bulletin #29
- Files: TRIS
- Created Date: Jul 19 1977 12:00AM