01476028

Component

https://doi.org/10.3141/2366-14

http://scholar.google.com...rphy&publication_year=2013

The pavement structural number (SN) is used in various applications worldwide. One application is the structural condition index. The structural condition index was developed for the Texas Department of Transportation (DOT) to support maintenance and rehabilitation decisions at the network level and is calculated as the ratio of two SN values (effective SN/required SN). A direct method of determining the SN from falling weight deflectometer (FWD) testing has been used to evaluate the effective SN. This study sought to increase the accuracy of the structural condition index by improving the method of determining the effective SN from FWD deflection data. A new equation was developed by modifying the equation that was previously used, and new coefficients for four different flexible pavement types were used. The new equation was improved by the addition of new variables for considering the depth to a rigid layer and by the use of a large database consisting of hypothetical pavement structures and responses. This effort not only benefits the Texas DOT by allowing increased accuracy in implementing the structural condition index but also helps other agencies improve their evaluation of the SN by FWD deflection at the network level. In this study, only surface-treated pavement and asphalt concrete pavement were evaluated; portland cement concrete pavement was not addressed.

01497499

13-4839

English

pp 120–126

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286855

Print

Figures (5) ; References (9) ; Tables (5)

Asphalt concrete pavements; Deflection; Falling weight deflectometers; Flexible pavements; Pavement maintenance; Pavement structural numbers; Rehabilitation

Texas

Highways; Maintenance and Preservation; Pavements; I60: Maintenance

PRP, TRIS, TRB, ATRI

Feb 5 2013 12:56PM

• Bayesian Approach to Updating Markov-Based Models for Predicting Pavement Performance
• Enhancing Network-Level Decision Making Through the Use of a Structural Capacity Index
• Evaluating Pavement Condition of the National Highway System
• Evaluation of the Effectiveness of Mississippi’s Pavement Warranty Program
• Findings from the International Scan on Managing Pavements and Monitoring Performance
• Impact of Error in Pavement Condition Data on the Output of Network-Level Pavement Management Systems
• Innovative Sprinkle Treatment for Thin Durable Asphalt Overlays
• Integration of Rolling Wheel Deflectometer Deflection Measurements into Pavement Management Systems: Use of Multivariate Statistical Methods and Fuzzy Logic
• Management of Pavement Maintenance, Rehabilitation, and Reconstruction Through Network Partition
• Pavement Condition States Before and After Treatment
• Probabilistic Characterization of Uncertain Inputs in the Life-Cycle Cost Analysis of Pavements
• Project Emission Estimator: Tool for Contractors and Agencies for Assessing Greenhouse Gas Emissions of Highway Construction Projects
• Toward Sustainable Pavement Management: Incorporating Environmental Impacts of Pavement Treatments into a Performance-Based Optimization