This report describes the maturity concept and its application in three case studies on actual construction projects. The three were all paving projects in the state of Washington, one a complete rebuild of a section of I-5 in downtown Seattle, and the other two panel replacements, one on I-5 in Bellingham and the other on I-205 in Vancouver.
The study found that maturity is a useful tool for determining the strength of the pavement and allowing early opening of the roadway to traffic. The use of all of the principles of the maturity concept, such as the development of the calibration curve, the use of the verification method to assure compliance of the mix with the original mix, and systematic record keeping and reporting, were not evenly applied in each case study. As a result of the uneven application, additional case studies with strict compliance to all principles of the maturity concept are recommended prior to the full implementation of this tool on future accelerated paving projects.