Development of an Integrated Pavement Screed for Screeding Asphalt or Concrete Crater Repairs
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG United States
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An important task in the rapid airfield damage recovery RADR crater repair process is screeding the capping material, which may be either hot mix asphalt or rapid-setting concrete. The repaired surface must meet roughness quality check RQC requirements of or - 0.75 in. to prevent fighter aircraft damage. Currently, the screeds recommended to meet RQC criteria for concrete repairs are cumbersome, slow, and require three or more personnel. Additionally, no screed has been identified to enable proper asphalt repairs. This projects objective was to evaluate prototype screeds two asphalt, two concrete and propose a single integrated screed for screeding either material to assist the RADR program in its efforts to develop lighter, leaner equipment. The new screed must also reduce manpower requirements, be less cumbersome to operate, and be able to perform small and large crater repairs. All four prototype screeds evaluated within the scope of this study reduced manpower and created a satisfactory surface finish when properly employed. Key differences affecting results were screed board shape and the ability to control the grade of the screed. Ultimately, the telehandler-powered Autoskreed was selected as the most promising system because both asphalt and concrete screeding activities could be integrated into a single device. Additional attachments were designed and tested, and a final integrated screed design is presented in this report that satisfies the projects objectives.