National Concrete Pavement Technology Center

Project description

This study aims to update Virginia Department of Transportation's (VDOT’s) concrete permeability requirements by revising the Virginia Test Method (VTM) 112 and VDOT’s Road and Bridge Specifications. The focus is on enhancing VDOT’s concrete permeability testing by expanding the use of resistivity-based methods, such as the surface resistivity, AASHTO T 358 (VTM 112 - Method B), which correlate well with results from the rapid chloride permeability test (RCPT), ASTM C1202 (VTM 112- Method A). Resistivity-based methods are faster and easier to conduct while providing a reliable indicator of concrete durability. This study will determine the effects of various curing methods and mixture compositions on resistivity and chloride permeability, aiming to establish new resistivity-based specifications. The outcome of this study will be a revised VTM 112 and updated permeability requirements that improve concrete approval and acceptance processes, reduces time consuming testing, and enhances the durability assessment of concrete materials across Virginia.