at past projects and identify things that have worked well and things that have not worked well. Several projects will be discussed that had experienced performance problems or that had exceptional performance. Some of the problems include premature cracking in longitudinal joints, potential FOD [foreign object damage] issues due to segregation of materials during construction, clay balls in HMA, organic materials in HMA, and percolation of water from underneath the pavement. The causes for these problems along with steps that can be taken to minimize these problems in the future willbe identified. One good performing project that will be discussed is a project in Alaska that was overlaid in 1976 that has continued to perform well to this day. It was the first project constructed by the military that used a specification having reduction in pay clauses for in-place density.The mixture properties and construction methods used for this project will be discussed along with a discussion of the observed performance to date. For the covering abstract see ITRD E139491.
Abstract