Partial depth repair (PDR) is a well-established technique applied to an existing concrete pavement that has spalls along joints and cracks. Nevertheless, there have been a number of failures of PDRs over the years on projects across the country. This Tech Brief focuses on PDR in Minnesota but also includes information from Missouri, Utah, Washington, Georgia, and California.

Diamond grooving of flexible (and rigid) pavements is a technique performed to reduce hydroplaning and to improve friction on all runways that serve turbojet aircrafts. Despite their widespread application, grooves in hot-mix asphalt (HMA) runways are prone to several distresses that limit their longevity at the desired level of serviceability.

The purpose of the Technical Assistance Requests (TAR 2017-2&3) was to conduct a preliminary assessment of the environmental impacts of direct discharge of concrete grinding residuals from the grinding machine to highway shoulders. Diamond grinding of concrete highway surfaces for pavement preservation generates large volumes of diamond grinding slurry (DGS) containing water and concrete residuals.

Precast pavement technology is an innovative process that can be used to meet the need for rapid repair and rehabilitation of asphalt and jointed concrete pavements. These systems are primarily used for rapid repair and rehabilitation of asphalt and portland cement concrete (PCC) pavements in high-volume-traffic roadways.

The primary purpose for sealing rigid pavement joints is to prevent or reduce the amount of water infiltrating into pavement structure. Effectiveness of joint sealants to protect jointed concrete pavement against water related distresses has been a focus of great interest recently. Results confirmed that if joint seals are properly installed, they can be very effective in preventing moisture infiltration and thus performance issues related to erosion damage. Unsealed joints had significantly higher flow rates compared to joints with varying degrees of damaged sealants.

This brief creates a foundation for future research taking into account various neighborhood characteristics. Making use of GIS data is necessary in order to demonstrate the impacts of reflective pavements accurately at urban scale. Results show; Evaluating the effectiveness of albedo modification strategies (changing surface reflectivity) involves quantifying the net impacts from both radiative forcing (RF) and building energy demand (BED). The relative magnitude of RF and BED depends on context, but usually RF is more significant.