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Item Density Demonstration Projects: Strategies for Improving Asphalt Pavement Density(10/25/2024) Aschenbrener, Tim; Hand, Adam; Hajj, Elie; West, RandyKnowing that in-place density is key for building cost effective and durable asphalt pavements, the Federal Highway Administration (FHWA) initiated the "Enhanced Durability of Asphalt Pavements through Increased In-place Pavement Density" demonstration project. The aim was to support State Departments of Transportation (DOTs) with evaluation of their existing density requirements for acceptance. It was anticipated that the results may aid State DOTs in reviewing and updating, as needed, their current field density acceptance criteria.Item Accelerated Implementation and Deployment of Asphalt Pavement Technologies Featured Products(2024-09) Hand, Adam; Aschenbrener, Tim; Von Quintus, Harold; Gopisetti, PraveenThe Asphalt Pavement Technology Program is an integrated national effort to improve the long-term performance and cost-effectiveness of asphalt pavements. Managed by the Federal Highway Administration through partnerships with State highway agencies, industry, and academia, the program's primary goals are to reduce congestion, improve safety, and foster technology innovation. The program was established to develop and implement suggestions, methods, procedures, and other tools for asphalt pavement materials selection, mixture design, testing, construction, and quality control. This Technical Brief summarizes products of a cooperative agreement on accelerated implementation and deployment of asphalt pavement techniques and the number of times they were uniquely accessed by stakeholders prior to publication of the Technical Brief.Item 2024 Accelerated Implementation and Deployment of Pavement Technologies (AIDPT) Pooled Fund Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary, FHWA-HIF-24-066 2024(Federal Highway Administration, 2024-03-14) Ahmed Sufian, Abu; Bittner, Jason; Hajj, Elie Y.; Aschenbrener, Timothy B.15 states across the United States (U.S.) gathered for a peer exchange and discussion on implementation activities to support Balanced Mix Design (BMD). The peer exchange was sponsored by the Federal Highway Administration (FHWA). The 15 States met to discuss state of knowledge, identify successes, current activities and research, and research and implementation gaps pertaining to challenges discussed during previously held regional peer exchanges. The peer exchange was held at National Center for Asphalt Technology (NCAT) in Auburn, Alabama. This summary report focuses on BMD state of knowledge, gaps, and challenges to implementation, performance testing protocols, management challenges, acceptance details, key takeaways, and emerging themes.Item Steps to Reduce Use of Cutback Asphalt in Pavement Maintenance and Preservation(AIEI, 2024-03) Baumgardner, Gaylon; Aschenbrener, Timothy; Youtcheff, JackThis Technical Brief provides information to facilitate better understanding of the current usage levels of cutback asphalt in pavement construction, maintenance, and preservation as well as State DOT specifications that may allow use of cutback asphalt. Areas where use of cutback asphalt can be reduced and alternatives to cutback asphalt are identified.Item Asphalt Pavement Industry Survey on Recycled Materials and Warm-Mix Asphalt Usage: 2022(National Asphalt Pavement Association, 2024-03) Williams, Brett A.; Willis, J. Richard, Ph.D.; Shacat, JosephThe objective of this survey, first conducted for the 2009 and 2010 construction seasons, is to quantify recycled materials used and WMA produced annually by the asphalt pavement industry to document the deployment of these technologies to understand where they are being used and where they are underutilized. Results show significant growth in the use of RAP, RAS, and WMA technologies since 2009, although the rate of year-over-year growth has generally slowed since 2013.