THE USE OF MANUAL METHODS TO EVALUATE THE STRUCTURAL CONDITION OF FLEXIBLE PAVEMENTS. SINO-BRITISH HIGHWAYS AND URBAN TRAFFIC CONFERENCE. PAPERS PRESENTED AT THE CONFERENCE HELD IN BEIJING 17TH-22ND NOVEMBER 1986

After a general discussion of systems for evaluating pavements, the author presents his own system, which is a modification of the system developed by the Transport and Road Research Laboratory (TRRL) (see IRRD 249500). When engineers examine a road pavement, they have to consider: (1) the condition of each of its layers and its compatibility with the load-carrying requirements of the pavement as a whole; (2) the measures needed to correct each defective component of the pavement. The most successful systems of pavement evaluation are either empirical methods partly modified by theoretical considerations or theoretical models in which the results are influenced by the known behavioural history of similar pavements. Theoretical methods have been developed to simulate linear elastic, nonlinear elastic, and visco-elastic behaviour in road pavements. The TRRL system, which is empirical, includes: (1) visual inspection; (2) deflection measurements; (3) deformation measurements; (4) classification of cracking; (5) in situ density tests and laboratory investigations. To these tests, the author has added (6) curvature tests; and (7) in situ strength profiles. His conclusions are as follows: (1) it is essential that teams are set up to carry out routine tests on sample lengths of the whole road network; (2) the most versatile testing system for evaluating roads in tropical and sub-tropical countries is based on many studies carried out there by TRRL; (3) the specifications for base and sub-base materials should be selected with care, if possible using materials meeting commonly accepted standards. (TRRL)

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• Corporate Authors:

  INSTITUTION OF HIGHWAYS & TRANSPORTATION

  6 ENDSLEIGH STREET
  LONDON,   United Kingdom  WC1H 0DZ
• Authors:
  • Bofinger, H E
• Publication Date: 1986

Media Info

• Features: References;
• Pagination: p. 239-246
• Serial:
  • Publication of: INSTITUTION OF ELECTRICAL ENGINEERS
  • Publisher: Institution of Electrical Engineers
  • ISSN: 0537-9989

Subject/Index Terms

• TRT Terms: Benkelman beam; Conferences; Cracking; Curvature; Deflection; Density; Developing countries; Durability; Evaluation; Field tests; Flexible pavements; Measurement; Strength of materials; Structural strengthening; Tropics
• ITRD Terms: 6105: Benkelman beam; 8525: Conference; 5211: Cracking; 5586: Deflection; 2870: Degree of curvature; 5908: Density; 150: Developing countries; 5910: Durability; 9020: Evaluation (assessment); 2944: Flexible pavement; 6226: In situ; 6136: Measurement; 5544: Strength (mater); 3096: Strengthening (pavement); 2513: Tropics
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00493121
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 31 1990 12:00AM