EVALUATION OF RIGID PAVEMENTS BY NONDESTRUCTIVE TESTS

THIS PAPER PRESENTS A VIBRATORY NONDESTRUCTIVE EVALUATION PROCEDURE AS APPLIED TO RIGID PAVEMENTS. IT IS RESTRICTED, HOWEVER, TO A COMPARISON BETWEEN A MEASURED DEFLECTION FIELD AROUND A LOADED PLATE AND A PREDICTED DEFLECTION FIELD OBTAINED BY USING ELASTIC PROPERTIES OF LAYERS (GATHERED BY NONDESTRUCTIVE TESTS) IN A RADIAL SYMMETRIC FINITE-ELEMENT PROGRAM ON A TEST SECTION. BECAUSE THESE TWO DEFLECTION FIELDS DO NOT AGREE IN THEIR MAGNITUDES DUE TO THE LOW STRAIN LEVEL CREATED BY THE VIBRATOR DURING THE DETERMINATION OF THE ELASTIC PROPERTIES OF THE LAYERS, TWO METHODS TO CORRECT THE MODULUS OF THE SUBGRADE MATERIAL (DETERMINED BY LOW-INTENSITY VIBRATION TESTS) WERE INVESTIGATED. THE FIRST METHOD USES THE INFORMATION OBTAINED BY A PLATE LOAD TEST; THE SECOND METHOD USES LABORATORY REPEATED LOAD TEST RESULTS (DEVELOPED BY THE UNIVERSITY OF KENTUCKY). THESE METHODS WERE APPLIED IN A SIMPLIFIED FORM TO A TEST SECTION. BY UTILIZING THE FINITE-ELEMENT METHOD, THE PREDICTED DEFLECTION FIELD WITH THE CORRECTED MODULUS WAS COMPARED WITH THE MEASURED DEFLECTION FIELD. FURTHER STUDIES REQUIRED TO MAKE THIS EVALUATIN PROCEDURE A USEFUL TOOL IN SOLVING PRACTICAL PROBLEMS ARE OUTLINED.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1972/407/407-008.pdf
• Supplemental Notes:
  • Sponsored by Committee on Pavement Condition Evaluation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Balakrishna Rao, H A
  • Harnage, D
• Conference:
  • 51st Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1972-1-17 to 1972-1-21
• Publication Date: 1972

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 76-86
• Monograph Title: Pavement technology
• Serial:
  • Highway Research Record
  • Issue Number: 407
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Coefficient of subgrade reaction; Deflection; Elasticity (Mechanics); Nondestructive tests; Plate bearing test; Rigid pavements; Vibration
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207496
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 15 1973 12:00AM