This TSPWG Manual provides a suite of laboratory tests, with their acceptable limits, which can be utilized to evaluate rigid spall repair materials used in portland cement concrete (PCC) pavements. Rigid materials are considered to be those that have elastic moduli higher than approximately 1,000,000 pounds per square inch (psi). They are designed to exhibit properties similar to ordinary portland cement (OPC) concrete. These materials may themselves contain OPC or they may contain other modern hydrating or cementing minerals, such as magnesium phosphate.
Rigid materials do not include most polymers, particularly those that are considered to produce “elastomeric concrete.” Spalls in PCC pavements consist of damage that does not penetrate through the pavement surface to the underlying layers. Spalls caused by weapons may be up to 5 feet (1.5 meters) in diameter. Typical pavement spalls require less than 1 cubic foot (0.028 cubic meter) of repair material, although larger spalls resulting from exploding munitions can occur in contingency environments.