Rapid-set concrete patch materials are used widely in the transportation industry, from horizonal applications for pavements; to vertical and overhead applications for bridges and structures. According to the NTPEP Project Work Plan which describes the ASTM- and AASHTO- test methods under which products are evaluated, "the study will look at both water based and non water based rapid setting materials used to patch portland cement concrete. These will include cementitious, latex modified, polymer resin, magnesium phosphate, and other materials expressly designed for patching portland cement concrete bridge decks and portland cement concrete pavements. Vertical and overhead applications will not be evaluated. In order to be classified as fast setting, the product must reach a traffic loadable condition (1200 psi compression) in less than three hours.
The NTPEP Project Panel responsible for authoring the Project Work Plan convenes yearly at the NTPEP National (Annual) Meeting. During this working meeting, the Project Work Plan is discussed; changes made, and shortly thereafter balloted for adoption. Improvements are immediately implemented in the next available testing cycle. When compared to other standards development exercises, the NTPEP process is agile, effective and efficient.