Investigation of early distress in Wisconsin rubblized pavements.
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2011-07-01
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Edition:Final report; 2011.
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Abstract:This study investigated premature distress formation in Wisconsin HMA overlays of rubblized concrete pavement. The premature ; distress was tented transverse cracking, which formed during the winter season and significantly affected pavement ride. The intent ; of this study was to determine the mechanism behind the failure and recommend changes in design and construction of rubblized ; pavements to prevent future failures. Design parameters, soil properties, historic distress levels, and several additional factors were ; analyzed for 19 good‐ and poor‐performing pavements. Service life and construction practices were also evaluated. ; Tented transverse cracking was a result of non‐uniform support of the rubblized layer. Weak support occurred at previous locations ; of deteriorated joints and cracks in the concrete pavement, causing a reflective crack in the HMA layer. Water entered the crack, ; froze and expanded in the winter, and caused tenting of the crack. It is recommended that deteriorated joints be repaired with base ; patching to create a more uniform pavement foundation. Test rolling of the rubblized layer was also suggested to locate additional ; weak areas. It is recommended that these weak areas be excavated below subgrade and backfilled with aggregate material. ; Using predictive models based on pavement distress information, the service life of the 11 pavements in the good performance ; category was forecast to be 17 to 25 years. The eight pavements in the poor performance category were projected to have a service ; life of 13 to 15 years.
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Main Document Checksum:urn:sha-512:03cd3abb626ef425e19817f3fa4cc91755512990e8fd4b190a6d2ff55e49a7766aeff59a9ec8cac62b119a64680007c24075f90b60d7a3ae2e6c17b04428eb08