Maximization OF BENEFITs FROM PAVEMENT PERFORMANCE DATA
Edward H. Guo
SRA International, 3120 Fire Road, Egg Harbor Township, NJ 08234
TEL.: (609)645-3772-120, FAX: (609) 645-2881,
Pavement performance data, rather than an analytical model, can be the most important tool in evaluating the rationality of design procedures for pavements. Examples of using performance data are discussed for three levels of interest:
PCI (Pavement Condition Index) level – general information. Data covering 26.7 million square meters of airport concrete pavement have been analyzed. The results can be used by policy makers to consider whether the current design specification is over- or under-conservative based on the available budget;
SCI (Structure Condition Index) level – pavement structure condition related. Data from about 15 million square meters of airport pavements with asphalt surfaces have been analyzed. The results can be used to verify whether the major distresses assumed in the current design procedure dominate the major failure of the AC pavements;
Single and/or combined distresses level – discovery of failure mechanism. This is an ongoing project under the Federal Aviation Administration, USA (FAA). The objective is to analyze the data to obtain failure mechanism related information in conjunction with (a) a mechanistic tool, (b) the results of indoor full scale tests at the FAA’s National Airport Pavement Test Facility, and (c) real-time tests at instrumented pavements in service, such as a runway section at the Denver International Airport.
The reliability and quantity of the data are both important for maximizing the benefits from analysis of pavement performance data. The FAA is sponsoring the development of a nation-wide airport pavement performance data collection and pavement management system – Web PAVER, based on the existing Micro PAVER system. After it is completed, users will be able to analyze the available data on-line and off-line to approach their different objectives, local, regional or global.
PRESENTERS’ QUESTIONS: I would like to receive comments, suggestions, and feedback from the meeting's attendees on the following matters:
What is the relationship among the analyses of pavement performance data, mechanistic tools, full scale tests and laboratory tests?
How do we appropriately handle the interactions among them to maximize the benefit of research?
How do we separate SCI from PCI to differentiate between the structural and nonstructural failures? What criteria are appropriate and can be used for determining the separation?
What type of failure mechanism may be discovered by using pavement performance data? If you have had some experiences, would you please provide your examples to show how to get failure mechanism related understanding by analyzing the pavement performance data?
PRESENTERS’ STATEMENT: This work is still in progress, and has not been submitted for presentation or publication at another meeting.