Webinar #2: Life Cycle Cost Analysis
for Airfield Pavements
Presenter: Paul Dalbey
Date: December 13, 2010
This webinar provides a comprehensive overview of life cycle cost analysis for airport pavements. It is applicable to both flexible and rigid airport pavements and addresses all aspects of life cycle cost analysis. The final product of the AAPTP study provides engineers and airport management with a fair, unbiased, defensible procedure to evaluate alternative pavement types during the design and/or bid process with all information required to successfully conduct a pavement life cycle cost analysis. The study provides information to meet FAA Order 5100.38C, AIP Handbook, paragraph 910, Life Cycle Costs in Competitive Sealed Bids. Life cycle cost analysis is a critical part of the pavement type selection process of many agencies to ensure cost-effective pavements are properly evaluated and selected in the design or bid stage of an airport improvement project.
Webinar #3: AAPTP Projects 04-02 and 04-03: PG Binder
Grade Selection & Implementation of Superpave Mix Design for Airfield Pavements
Date: February 22, 2011
The first presenter will provide an overview of the proposed procedure for selecting asphalt binder grade for airfield pavements using the PG grading system. The basic components of the PG grading system will be presented. Design engineers need to understand differences between the performance of airport and highway pavements that are critical to recognizing the factors that effect PG binder selection. The webinar will present a proposed revision of section 2.3 of Item P-401/P-403 Plant Mix Bituminous Pavements for use by practicing engineers. The revision provides appropriate binder PG grades for a wide range of airfield paving projects and is more effective than existing procedures for selecting PG grades for highway applications.
The second presenter will provide a brief overview of the basic components of designing hot mix asphalt for airfield pavements utilizing the Superpave gyratory compactor. Both the Marshall and Superpave mix design methods use a four step mix design method: 1) Material Selection, 2) Optimize Gradation, 3) Optimize Binder Content, and 4) Moisture Susceptibility. The biggest difference between the two methods is the Marshall method utilizes the impact loading of the Marshall hammer while the Superpave method utilizes the kneading action of the gyratory compactor.
Webinar #4: Improved Performance of Longitudinal Joints on
Presenter: Dr. Rajib Mallick
Date: April 11, 2011
This webinar will provide an overview of technical guidance for the improved construction and performance of longitudinal joints on asphalt airfield pavements. The unsatisfactory performance of longitudinal joints is one of the biggest problems on hot-mix asphalt airfields. Several different approaches to constructing longitudinal joints have been used with varying degrees of success. The presentation will report on the extensive synthesis of research and experience on conventional and special longitudinal joint construction techniques on both airfields and highways. It will include these topics: notched wedge joint, rubberized asphalt joint adhesive, cutting wheel, restrained edge device, joint maker, infrared joint heater, joint tape, paving in echelon, and target compaction level both at the joint and mat. The webinar will discuss present specifications and discuss requirements to use the different joint construction methods.
Webinar #5: Techniques for Prevention and Remediation
of Non Load-Related Distresses on HMA Airfield Pavements
Presenter: Doug Hanson
Date: May 2, 2011
Hot-mix asphalt (HMA) pavements represent a considerable investment in the infrastructure of airfield pavements. This study found that approximately 20 percent of HMA-surfaced airfield pavements have some level of non loadassociated distress (block cracking, longitudinal and transverse cracking, and weathering and raveling). This webinar presents the results of a technical review of the causes of non-load associated cracking – specifically, how the effects of climate, crude source, chemistry of asphalt aging, HMA mixture and pavement construction variables contribute to non load-associated distress will be discussed. The use of MicroPAVER software to predict pavement- rehabilitation trigger will be discussed. The Guide for Prevention and Mitigation of Non Load-Associated Distress on airfield pavements will also be presented. The webinar will discuss a test procedure that shows great promise for monitoring the aging effects on the life of an HMA pavement.
Developed & maintained by Linda Kerr