D-cracking field performance of Portland cement concrete pavements containing limestone in Kansas : phase 1 report.
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2012-05-01
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Edition:Final report; Apr. 2009¿Jan. 2012.
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Abstract:Premature deterioration of concrete pavement due to D-Cracking has been a problem in Kansas since the 1930s. ; Limestone is the major source of coarse aggregate in eastern Kansas where the majority of the concrete pavements are ; constructed. D-Cracking field performance was investigated to determine whether aggregate freeze-thaw durability ; specifications implemented in the 1980s have reduced materials-related failures to an acceptable level. ; The results indicate that the failure rate has decreased, but not to an acceptable level. Limestone source material ; appears to be the dominant parameter affecting D-Cracking, while other design parameters, such as base type, joint ; sealant type, joint spacing, and joint orientation do not appear to significantly affect the presence of D-Cracking. ; Subsidiary aggregate-related reaction mechanisms were observed at locations with surface D-Cracking likely due to ; the increased amount of water penetration. The subsidiary reactions generally do not appear to be present at locations ; away from the D-Cracking. ; Kansas Department of Transportation policies (any actions, requirements, or decisions) that affect the risk of DCracking ; were reviewed. Recommendations included implementation of field performance criteria for aggregate ; material sources, improvement and unification of quarry monitoring and sampling procedures, to perform life-cycle ; cost analyses for various aggregate materials in concrete, and future monitoring of quarry field performance.
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Main Document Checksum:urn:sha256:68aaf6ff6f6a04df514136cb34145c4b94b029228f3bb308f726106781e842d7