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.źƷǒƒźƓƚǒƭ tğǝĻƒĻƓƷ {ƷƩźƦƦźƓŭ wĻƭĻğƩĭŷ CźƓķźƓŭƭ <br /> /źƷǤ ƚŅ wğƒƭĻǤ <br /> January 16, 2020 <br />CźƓķźƓŭƭ ğƓķ tƩğĭƷźĭĻƭ ƚŅ ƚƷŷĻƩ /źƷźĻƭ <br />Andover <br /> <br />Moving away from sealcoating streets <br /> <br />o <br />Collects funds for first crackseal of new streets from developers <br /> <br />o <br />Anoka <br /> <br />Sealcoating AND fog sealing all streets <br /> <br />o <br />Cracksealing streets one year before sealcoating/fog sealing <br /> <br />o <br />Brooklyn Park <br /> <br /> <br /> <br />o <br />More input will be obtained January 17 <br /> <br />o <br />Coon Rapids <br /> <br />Administers Northwest Metro Pavement Management Group (JPA) <br /> <br />o <br />Planning to try faster curing fog seal emulsion offered by FHR this year (CQS-1hd50) <br /> <br />o <br />Crack filling only applied to collector streets (no sealcoats) <br /> <br />o <br />Sealcoating only applied to local streets <br /> <br />o <br />Fog sealing only applied to cul-de-sacs <br /> <br />o <br />Saint Michael <br /> <br />Stripping issues experienced since mid- <br /> <br />o <br />Stopped sealcoating streets 4 years ago. <br /> <br />o <br />Applying Reclamite to streets with wear course (new and overlays) < 2 years old. <br /> <br />o <br />Woodbury <br /> <br />Stripping issues first experienced in . <br /> <br />o <br />Stopped sealcoating streets around 2009. <br /> <br />o <br />Replaced around 85 miles of residential street pavement since 2014 <br /> <br />o <br />Adopted new mix design per MnDOT Tech Memo 17-sa-01 <br /> <br />o <br />Applying Reclamite to all new pavement within 1 year <br /> <br />o <br /> <br />DĻƓĻƩğƌ /ƚƒƒĻƓƷƭ ğƓķ hĬƭĻƩǝğƷźƚƓƭ <br />Stripping issues are observed more often after the second sealcoat. <br /> <br />Once stripping is observed it continues to expand. <br /> <br />Freeze thaw cycles accelerate stripping. <br /> <br />Based on weather trends, northern climates should expect to experience increased; <br /> <br />Rain events each winter, resulting in greater saturation of pavements <br /> <br />o <br />Freeze-thaw events each winter <br /> <br />o <br />Mill and infill is effective to repair stripping damage źŅ ķƚƓĻ ĬĻŅƚƩĻ ƭƷƩźƦƦźƓŭ ƦƩƚŭƩĻƭƭĻƭ źƓƷƚ <br /> <br />ƦğǝĻƒĻƓƷ ĬğƭĻ ĭƚǒƩƭĻ. <br />Pavement rejuvenators (Reclamite, Replay, etc.); <br /> <br />Penetrate into pavements roughly 3/8-inch <br /> <br />o <br />Replace maltenes in oxidized pavements <br /> <br />o <br />Effectively seal pavement surfaces <br /> <br />o <br />Numerous U.S. cities have used for decades, including Chicago <br /> <br />o <br /> <br />\[ƚĭğƌ wƚğķ wĻƭĻğƩĭŷ .ƚğƩķ Λ\[ww.Μ tğǝĻƒĻƓƷ {ƷƩźƦƦźƓŭ wĻƭĻğƩĭŷ /ƚƓĭƌǒƭźƚƓƭ ğƓķ wĻĭƚƒƒĻƓķğƷźƚƓƭ <br />2013-08 Stripping of Hot-Mix Asphalt Pavements under Chip Seals (Wood & Cole, MnDOT) <br /> <br />Conclusions: Stripping of HMA pavement after application of chip seal caused by areas <br /> <br />o <br />of high air voids or low density. <br />Page Њ of Ћ <br /> <br /> <br />