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WSDOT Chip Seals--Optimal Timing, Design, and Construction .
Dec 1, 2014 . emphasize in its preservation program lower-cost options such as chip . conducted on several aspects of WSDOT chip seals including (1) .. Use of double chip seals .. 342 suggested that Australia, New Zealand, and South Africa were . at roughly the 16 mm aggregate size (approximately 5/8” stone).