A STUDY OF THREE PROCEDURES FOR THE MEASUREMENT OF LONGITUDINAL IRREGULARITY IN PAVEMENTS

ESTUDO DE TRES PROCEDIMENTOS PARA A MEDICAO DE IRREGULARIDADE LONGITUDINAL EM PAVIMENTO

This paper presents a statistical comparison of the results of three methods for the determination of roughness values and the measurement of longitudinal irregularity in road pavements in Brazil. As measurements of this type vary with changes in the suspension characteristics of the measuring vehicle, the measurement methods required calibration on surfaces of known roughness. For this purpose, 30 sections of length 320 m were selected with different longitudinal irregularity; 15 of the sections had bituminous concrete surfaces, and 15 had surface treatment. The measurement procedures studied were: (1) QIrmsva with rod and level, based on the real pavement profile which is sampled at 50 cm intervals; (2) the IPR-USP Roughness Indicator; (3) the TRRL Merlin equipment. Tables and graphs show the results of using the three methods on the 30 test sites and the statistical correlations between these results. The quality of the correlations was reasonable, although the correlation differed for the two surface types. Of the three methods, Merlin appears to be the most suitable 'low tech' alternative for pavement monitoring, given its characteristics of low cost, simplicity and robustness. This paper was originally published in Portugese in the XXIII Annual Pavement Conference, Florianopolis, October 1989.

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Heyn, A T
  • Kaniak, V L
  • Aranovich, LAS
• Publication Date: 1989-4

Language

• English

Media Info

• Pagination: 4 p.
• Serial:
  • TRRL TRANSLATION
  • Publisher: Transport and Road Research Laboratory (TRRL)

Subject/Index Terms

• TRT Terms: Evaluation and assessment; Measurement; Measuring instruments; Pavements; Rutting; Smoothness; Translations; Wearing course (Pavements)
• Geographic Terms: Brazil
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00606120
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: T 3484
• Files: ITRD, TRIS
• Created Date: Mar 31 1991 12:00AM