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COMPARATIVE TESTING OF PROFILOMETERS.
| 题名： | COMPARATIVE TESTING OF PROFILOMETERS. |
| 作者： | Perera-RW; Kohn-SD; Richter-CA |
| 关键词： | PROFILOMETERS-; COMPARISONS-; ACCURACY-; REPEATABILITY-; TEST-SECTIONS; ASPHALT-PAVEMENTS; CONCRETE-PAVEMENTS; INTERNATIONAL-ROUGHNESS-INDEX; ANALYSIS-OF-VARIANCE; WHEELPATHS-; RANDOM-MEASURING-ERRORS |
| 摘要： | A comparative testing experiment between the four K.J. Law profilometers that are used to collect data for the Long-Term Pavement Performance program was conducted in Ames, Iowa, in August 1992. The objectives of the comparison were to (a) determine whether the profilometers collect similar data, (b) determine whether the profilometers can collect repeatable data at a section, and (c) compare data collected by the profilometers with data collected by the Dipstick and the rod and level. Four asphalt concrete and four portland cement concrete sections were selected for testing. All profilometers obtained six replicate runs at 65 km/hr (40 mph) and 80 km/hr (50 mph) at all test sections. The international roughness index (IRI) computed from the profile data was used as the statistic to analyze profiles. An analysis of variance was separately conducted on the left and right wheelpath IRI. This analysis showed that similar profile data are being collected by the profilometers in both wheelpaths. All profilometers showed good repeatability in collecting data. Generally good agreement was obtained between the IRI computed from profiles measured by the Dipstick and the profilometers. A study of random measuring errors showed that they can have a considerable effect on IRI of smooth pavements. Generally, for pavements that had IRI values less than 1.6 m/km (100 in./mi), poor agreement was obtained between IRI computed from rod and level and profilometer profiles. This was attributed to random measuring errors during rod and level measurements. Better agreement was obtained between rod and level and profilometer IRI for profiles that had an IRI greater than 1.6 m/km (100 in./mi). |
| 总页数： | Transportation Research Record. 1994. (1435) pp137-144 (4 Fig., 8 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
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