, Assistant Professor, UMD-Civil Engineering
Structural fibers improve the long-term performance of concrete pavements and overlays. The state of Minnesota has been using various structural fibers in concrete pavements and overlays for many decades at MnROAD, with limited placement on the mainline concrete pavements. MnDOT has also implemented structural fibers into a vast majority of the concrete bridge decks placed since 2017 to control bridge deck cracking. In addition to using structural fibers, the state of Minnesota is currently moving toward the implementation of the performance engineered mixture (PEM) design for pavements. The concept of the PEM design is to assess the quality of concrete based on what it encounters in the field during pouring and throughout its service life. The goal of the PEM mixture design procedure is to produce concretes that offer resistance to climate- and material-related distresses, such as durability cracks and concrete degradation due to chloride-ion penetration. Different types of tests are performed in the PEM design procedure: Super Air Meter (SAM), Box, Vibrating Kelly Ball (V-Kelly), Surface Resistivity, and formation factor bucket tests, etc. The main objective of this project is to study the correlation between the results of the abovementioned tests when conducted on FRC, and to determine the target ranges for these results.
- Project number: 2020007
- Start date: 06/2019
- Project status: Active
- Research area: Infrastructure