Evaluation of Lightweight Profilers for Construction Smoothness Evaluation, MLR-02-02, 2004

(2004) Evaluation of Lightweight Profilers for Construction Smoothness Evaluation, MLR-02-02, 2004. Transportation, Department of


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High-speed non-contact laser profilers have become the standard testing equipment for pavement management ride quality testing. The same technology used in the high-speed profilers is now being used in lightweight profilers for construction smoothness testing. The lightweight profilers have many advantages over the California 25-ft profilograph. Despite the many advantages of the lightweight profilers, there is resistance from the contracting industry toward eliminating the 25-ft profilograph for construction ride testing. One way to reduce or overcome the resistance is to evaluate and demonstrate the advantages/disadvantages of the lightweight profiler in actual field use in Iowa. The objective of the study was to purchase a lightweight profiler and to evaluate its suitability for construction smoothness quality verification and quality acceptance on Iowa projects. A lightweight profiler, an Ames Engineering, Inc. LISA single laser unit, was received in February 2003 for the study. Based on the work done during the 2003 construction season, the following conclusions can be made: (1) For hot mix asphalt surfaces, the LISA correlated well with the contractors' profilographs; (2) LISA results are significantly affected by longitudinal tining on portland cement concrete pavements, requiring a laser system upgrade to give accurate results; (3) A significant timesaving was realized by using the LISA; (4) Increasing visibility and reducing time in the construction zone improved safety; (5) One person with limited lifting capabilities could set up and operate the LISA; and (6) With the current Iowa Department of Transportation specification, the LISA cannot totally replace the profilograph, since bridges and short segments with no adjoining pavement would still require a profilograph.

Item Type: Departmental Report
Keywords: Acceptance tests, Accuracy, Asphalt pavements, Concrete pavements, Correlation analysis, Demonstration projects, Lasers, Profilographs, Quality control, Road construction, Smoothness, Visibility, Work zone safety
Subjects: Transportation > Pavements
Transportation > Roads and highways
Transportation > Design and Construction
Transportation > Data and Information Technology
ID Code: 19905
Deposited By: Iowa DOT Library
Deposited On: 24 Jun 2015 17:04
Last Modified: 24 Jun 2015 17:04
URI: https://publications.iowa.gov/id/eprint/19905