Institute for Transportation

About the research

The purpose of this cooperative agreement is to further an ongoing concrete pavement technology program, which includes the deployment and transfer of new and innovative technologies and strategies to advance concrete pavements and improve pavement performance.

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Project Details

Work areas for this project are as follows:

• Deployment of new, cost-effective designs, materials, recycled materials, and practices to extend the pavement life and performance and to improve user satisfaction—with a focus on concrete recycling and the use of industrial waste or byproducts in concrete pavement mixtures
• Reduction of initial costs and life-cycle costs of pavements, including the costs of new construction, replacement, maintenance, and rehabilitation—with a focus on strategies and technologies for rehabilitation and maintenance
• Deployment of accelerated construction techniques to increase safety and reduce construction time and traffic disruption and congestion—with a focus on the use of performance engineered concrete mixtures for accelerated construction without compromising durability
• Deployment of engineering design criteria and specifications for new and efficient practices, products, and materials for use in highway pavements—with a focus on further development and implementation of the American Association of State Highway and Transportation Officials (AASHTO) PP 84-17 specification for Performance Engineered Concrete Mixtures
• Deployment of new nondestructive and real-time pavement evaluation technologies and construction techniques—with a focus on technologies for construction quality assurance and quality control
• Effective technology transfer and information dissemination to accelerate implementation of new technologies and to improve life, performance, cost effectiveness, safety, and user satisfaction—with a focus on partnering with state departments of transportation (DOTs) and industry to advance these innovative technologies

About the research

Sustainable engineering technologies in pavement rehabilitation, such as full-depth reclamation (FDR), could be the answer for agencies in their quest to provide taxpayers with high-quality infrastructure while being good stewards of public funds. Full-depth reclamation of asphalt pavement is a rehabilitation method that involves recycling an existing asphalt pavement and its underlying layer(s) into a new base layer. The FDR process begins with using a road reclaimer to pulverize an existing asphalt pavement and a portion of the underlying base, subbase, and/or subgrade. Usually the pulverized material is uniformly blended with an additional stabilizing material such as cement to provide an upgraded, homogeneous material. Finally, the stabilized material is compacted in place with rollers. The result is a stiff, stabilized base that is ready for a new rigid or flexible surface course. This guide introduces the FDR with cement process and discusses issues related to project selection, design, construction, and testing/quality control.

About the research

The objective of this project is to develop an understanding of the effect of concrete admixtures on roller-compacted concrete (RCC) mixtures and to prepare recommendations for their appropriate use. The project emphasis is on water reducers, set retarders, and evaporation retarders; it does not include the study of air-entraining agents.