DEVELOPMENT OF A SIMPLE DEVICE FOR PREDICTING THE PERMISSIBLE SPRING AXLE LOADING OF ASPHALT PAVEMENTS

The measurement of pavement deflection can provide valuable information for predictiong the load-carrying capacity of asphalt pavements. It is agreed by most states that deflection measurements are invaluable in evaluating existing pavements and will become equally important in the design of future flexible pavements. The Benkelman Beam has been used by many Highway Departments to aid in the evaluation of flexible pavement performance. This device while extremely useful is large and cumbersome for use in the frequent and numerous pavement deflection tests as advocated by this project in measuring the pavement condition during the spring breakup period by maintenance personnel. The Union of South Africa has developed a curvature meter 10 inches in length using a 0.0001-inch dial. These devices were correlated with the Benkelman Beam. The 30- and 48-inch beams proved much easier to operate the both correlated very well with the Benkelman Beam. The 10-inch curvature meter was more difficult to operate and was damaged before the series of tests were completed. The next phase of this project will be the collection of field data from roadway test sections throughout the state. This data will be analyzed to determine if load limits may be placed on highways during spring breakup with deflection measurements serving as the criterion.

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 22 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264388
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Jan 16 1975 12:00AM