Evaluation of high friction surface locations in Kansas.
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2016-05-01
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Abstract:In 2009, the Kansas Department of Transportation entered into an agreement with the Federal Highway ; Administration to fulfill the requirements of the High Friction Surface Materials Enhancing Safety at Horizontal ; Curves on the National Highway System project. ; Four locations were chosen in Kansas, two on existing asphalt pavement and two on concrete pavement. The ; applications on asphalt were on highway segments and the concrete segments were medium to high volume ramps at ; two separate interchanges. Traffic volumes ranged from approximately 1,000 vehicles per day to 25,000 vehicles per ; day. In general, the surfaces are performing poorly; one of the lower trafficked surfaces, an asphalt application, failed ; in less than three years. The surfaces on the two applications on concrete are peeling off and skid resistance numbers ; are dropping. ; In late 2013 and early 2014, the surfaces were evaluated and several tests were performed to determine quality ; of the product with less than desirable results. Tests performed included bond testing of the High Friction Surface ; (HFS), rapid chloride permeability testing of the pavements with and without the HFS, and skid resistance testing. The ; skid resistance values were compared to skid testing that was performed immediately before placement, immediately ; after placement, and intermediate skid testing. ; Results of the testing were mixed; bond was generally poor and skid resistance was dropping rapidly. The ; results of the review have led to a rewrite of the application specification with an improvement in the surface
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Main Document Checksum:urn:sha256:c279366a8fd074f80805767335b6e90dd95261e29b6e881ffa86e17ff35a78bd