沥青路面微表处实验特征

Our mission is to Keep Alaska Moving through service and infrastructure.Alaska Department of Transportation & Public FacilitiesMicrosurfacing Experimental FeatureMinnesota Drive RampsDrew Pavey Pavement ManagementNovember 20232Why Microsurfacing•Looking for an economical solution to fix ruts§Alternative to mill/fill 2” to fix a ¾” problem•It is used widely in the lower 48§Emulsion, aggregate, additives•Source: Ingevity – North Dakota Asphalt Conference – Future of Micro Surfacing, 20183History of Micro•Approached about using micro 10-15 years ago§But testing showed it would fail under studded tire wear•Used the Prall test to simulate wear•Can’t move forward until a formulation does resist stud wear•Approached again in 2016•Highly polymerized binders can now be emulsified (PG64-40)•Tests came back with good resultsStainless Ball Bearings4Project Selected - Minnesota Ramps•Placed on Minnesota Ramps§Ruts had deepened, added a pre-level to rut fill on some ramps (change order)§Did crack fi