The aims of this project were to improve and retrofit the design of a pavement crack cleaning device (CCD) developed in the previous IDEA project (NCHRP-148), to make it more practical and functional by adding functions such as routing, hot air blasting and vacuuming. As an outcome of the previous research, a conceptual prototype of a crack cleaning device was innovatively designed, utilizing pneumatic power for air blasting and abrasive wire brushing to simultaneously remove debris or de-icing chemicals which were used in cold winter and remained in cracks. In the current project, a router, an electric heat lance and a vacuum system have been incorporated as possible options for the CCD. An electrical heat lance has been designed to properly warm the pavement and expel moisture to promote bond adhesion. In addition, a vacuum system has been developed as a means of collecting debris and dust to remove road hazards and improve operator safety while conforming to OSHA and EPA guidelines. Routing and saw cutting functions have been added to the CCD as well. For validation of the CCD in the field and to gain industry acceptance of the CCD technology, several industry demonstrations and field tests were conducted. Multiple CCD units were provided to the Nebraska Department of Roads (NDOR) for use during the full sealing season in 2012-2013, which was financially supported by NDOR. Also, demonstrations were conducted at the Crafco Inc. manufacturing facility in Chandler, AZ and at the City of Omaha, NE, road maintenance division. Productivity data along with the crews’ feedback were collected during the field tests. The analyzed results showed that the CCD design concepts have been well received by all participating industries, who expect that the CCD will positively impact highway road maintenance by improving productivity, safety and maintenance cost. Crafco Inc. has shown strong interest in commercialization of the CCD, and commercialization efforts currently are underway between the PI’s institution and Crafco Inc. If successful in commercialization and industry adoption, utilizing the CCD for crack and joint preparation would lead to an increase in overall quality of pavement maintenance, increase the useful life of pavements, and reduce costs toward rehabilitation or new construction of roadways.

The contractor's final report is available.