Modified Aggregate Test Expedites Superpave Kansas Department of Transportation's Field Test Saves Time and Money

摘要

The Superpave~® (Superior Performing Asphalt Pavements) design of hot-mix asphalt mixtures requires minimal coarse and fine aggregate angularities. This ensures a high degree of aggregate internal friction and rutting resistance.rnCoarse aggregate angularity is defined by the percentage of weight that consists of aggregates larger than 4.75 mm and with one or more fractured faces. Fine aggregate angularity is defined by the percentage of air voids—or the U-value—in loosely compacted aggregates smaller than 2.36 mm; higher percentages of air voids indicate larger quantities of fractured faces.rnHere is how one agency met the Superpave requirements as soon as they became available.