Investigation of Spall Repair Materials for Concrete Pavement

Abstract

This project investigated the properties and performance of the products used for spall repair of concrete pavement. A survey of Texas Department of Transportation (TxDOT) maintenance engineers produced a roster of 10 repair materials currently in use in the state. After identifying the key characteristics of a successful repair material, a laboratory testing program was developed to evaluate the properties of the repair materials. These materials were tested for strength, compatibility, and bond to quantify their characteristics relative to those products known to work well. To correlate laboratory data to field data, researchers conducted performance surveys including field core tests, and the field placement of products was performed on a test section. Researchers made recommendations regarding properties, which best predict the success of material and testing procedures to determine these properties. The results of this project will then be used to develop a set of guidelines for the selection of repair materials and the repair procedures to be used by TxDOT engineers to yield the best performance of repaired pavement.