The Arkansas Concrete Pavement Conference got kicked off with the signing of a Partnering Agreement between ArDOT and the Concrete Paving Industry.
The agreement serves as a means of continually improving communication involving our organizations, nurturing the working relationships between the parties, and providing quality concrete pavements that provide the best value to the citizens of the State of Arkansas.
ArDOT and Industry share a long history of partnering with one another to deliver outstanding concrete paving projects.
Concrete overlays can save significant amounts of time compared to traditional methods. The Missouri Department of Transportation (MoDOT) learned just how much when it needed to resurface a nine-mile stretch of I-44 near Rolla, Missouri, part of the main connector between the Lake of the Ozarks and St. Louis. With the Lake of the Ozarks being a major recreation and vacation destination, construction-related traffic delays were a major concern; therefore, the contract specified 90 calendar days for completion. Two miles of the project involved milling 11 inches of the existing asphalt pavement and inlaying an 11-inch concrete overlay. Seven miles of the project involved placing an 8-inch unbonded concrete overlay using a geotextile fabric as the separation layer. The contractor paved 219,137 square yards of concrete in 47 days and turned over the project to the State in only 66 days.
To learn more about concrete overlays, visit the FHWA TOPS website or watch a recent webinar called “Concrete Overlays: A Proven Technology.” Webinar topics include an introduction to concrete overlays, challenges, maintaining existing pavements, the value proposition, how to get started, and project highlights. For additional information, contact Robert Conway, FHWA Resource Center.
(Reprinted from EDC Newsletter)
The Federal Aviation Administration (FAA) issued a Program Guidance Letter (PGL) on June 29th clarifying how the discount rate for cost effectiveness analysis, also known as Life Cycle Cost Analysis (LCCA), should be determined. Cost effective analysis is appropriate to determine which pavement type is the most economical solution to repair or replace existing infrastructure.
According to the PGL, real discount rates from the latest OMB Circular A-94 should be used when performing a cost effectiveness analysis. The PGL also changes the requirement for a 20-year analysis period to allow the design engineer to choose an appropriate time period for the cost effectiveness analysis. A copy of OMB Circular A-94 for 2022 can be downloaded here.