Assessment of ASTM D 6690-12 type II and type IV joint sealers.
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2014-11-01
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Abstract:To address the issue of water infiltration and debris retention, bi ; tuminous crack sealers and fillers have been ; developed to help prevent premature pavement distress. If applied appropriately, crack sealers and fillers can ; significantly extend the life of a pavement. To utilize crack sealers and fillers properly, one mu ; st understand that ; sealers and fillers differ in application and material types. Crack sealers are typically used on cracks that move ; more than one ; - ; eighth inch, with the intention to prevent water and debris from entering the pavement structure. ; The rigo ; rous installation process involves thorough crack preparation followed by placement of high elongation ; material in a specific configuration. Crack fillers generally use a stiffer material than crack sealers and are typically ; used on non ; - ; working cracks ; The ; purpose of this study was to examine and evaluate the constructability, overall performance and cost ; effectiveness of AASHTO M324 ; - ; 12 Type II versus IV Joint Sealers. Research personnel assessed each product’s ; durability at each location. Cracks were fil ; led according to the project plans. Efforts were made to provide a ; comparative analysis with regard to performance and cost of both material types by minimizing application ; variations in weather conditions, equipment used, and application crewmembers by a ; pplying material on the same ; day and/or conditions. ; Over a ; three ; - ; year ; span and six data collection timeframes, the type IV material resulted in an average of a ; 10% less allowance of water passage through the length of a filled crack. A ten percent better ; performance of a ; material over a comparable alternative is considerable and should not be ignored, and results in approximately 2 ; feet less of compromised length of a full width transverse crack
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Main Document Checksum:urn:sha256:7b5d94f41e1c8094035e71c746f5a60fbf8f2c7410cb283dc30297fa478606b3