Microwave methods and apparatus for paving and paving maintenance

The MPH strip-patcher-recycler eliminates most of the conventional patching equipment, operators and the hot-mix plant, and should reduce costs dramatically. In practice, the machine simply drives along over the damaged strip heating it in-place with microwave; roto-mixing it while injecting hot engine exhaust and make up asphalt or conditioners; screening and tamping. A follow up roller completes the job. Traffic control is simpler and work can be performed in cold or damp weather, and more easily at night - if necessary. The design and operation of the MPH machine are described.