01005200

Component

https://doi.org/10.3141/1907-12

http://scholar.google.com...wman&publication_year=2005

Ride quality assessed with an inertial profiler on flexible pavement was used to provide initial information on the following key issues: repeatability associated with international roughness index (IRI) values for a wide range of hot-mix asphalt (HMA) material variables, timing of acceptance testing for initial ride quality, IRI changes with type of roadway, influence of stops and starts in the paving operation on ride quality, identification of “bump,” and effect of grinding on IRI. IRI was calculated for 25-ft intervals instead of the standard 0.1 mi (528 ft) for all testing to highlight local anomalies such as bumps due to paving stoppages. Results indicate that the standard deviation of three replicate passes with an inertial profiler is 5 in./mi (includes 46 HMA mixes on the Auburn University National Center for Asphalt Technology test track). IRI measurements with time suggest that initial acceptance testing can be conducted within 7 days, which allows more flexibility in scheduling by the agency. Limited traffic also slightly reduces the IRI values, which is to the contractor’s advantage. IRI values are suggested for two-lane county roads and medium- to high-traffic facilities. Separate IRI ranges are indicated for each of these categories on the basis of the type of HMA construction: new, repair and overlay, and mill and overlay. These ranges are set for best and good practices (continuous paving, no stoppages; consistent supply of trucks, very short stops). IRI values greater than 125 in./mi in any given 25-ft interval indicate a bump; bumps can be ground so that these areas have IRI values of less than 100 in./mi.

01005195

English

pp 105-112

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093791

Print

Figures (5) ; References (3) ; Tables (6)

Acceptance tests; Asphalt pavements; Hot mix asphalt; Ride quality; Road construction

International Roughness Index

Inertial profilers; Repeatability

Construction; Highways; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Oct 7 2005 11:19AM

• Changing the Shape and Location of Pavement Load Transfer Devices
• Computerized System for Efficient Scheduling of Highway Construction
• Design and Construction of a Full-Width, Full-Depth Precast Concrete Deck Slab on Steel Girder Bridge
• Development of a Test Method to Measure the Quality of Milling Operations in Asphalt Pavements
• Development of the Florida Department of Transportation's Percent Within Limits Hot-Mix Asphalt Specification
• Evaluation of Dowel Bars Installed in Airfield Concrete Pavement Construction Joints by Using Plastic Sleeves
• Experimental Investigations of the Effects of Multiple Heat Straightening Repair on the Structural Properties of Bridge Steels
• Forecasting Payments Made Under Construction Contracts: Payout Curves and Cash Management in the North Carolina Department of Transportation
• Improving Construction Communication
• Investigation of the CoreLok for Maximum, Aggregate, and Bulk Specific Gravity Tests
• Knowledge-Based Scheduling Analysis Software for Highway Rehabilitation and Reconstruction Projects
• Measuring Rebar Cover Depth in Rigid Pavements with Ground-Penetrating Radar
• Performance Testing of Segregated Hot-Mix Asphalt Samples to Evaluate Segregation Models
• Refinement of the Hot-Mix Asphalt Ignition Method for High-Loss Aggregates
• Risks with Multiple Pay Factor Acceptance Plans