Work plan for special design features and crack sealing maintenance.
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2013-09-01
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Abstract:The Alaska DOT&PF wants to construct and maintain asphalt concrete (AC) paved highways in a way that minimizes roadway lifecycle costs while preserving acceptable ; performance. Thermal cracking is a natural feature of most paved Alaska roadways that influences both long term maintenance costs and the driving public’s perception ; of road performance. This work plan for a research test section provides construction and maintenance procedures to address what is arguably the most severe form of ; thermal cracking — major transverse thermal cracks. ; A newly constructed AC pavement surface will be modified with the addition of presawn transverse cracks (placed according to specified spacing and cut depths). Based ; on previous experience it is expected that many of the presawn cracks will become active transverse thermal cracks. Alaska experience suggests that this controlled form ; of thermal cracking result in a “better thermal crack” in terms of ride roughness and visual appearance. Alaska experience further suggests that such cracks should require ; little if any sealing maintenance over the life of the pavement. The work plan includes long term monitoring and maintenance methods that will be used to evaluate the ; performance of the experimental sections.
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Main Document Checksum:urn:sha256:0239efbde72f1e811a1810cd1db00b405ff142f2738ea9fbb9118e78e92b38e2