Influence of hydrated lime on durability of SMA asphalt pavement with quartzite aggregate

The durability of pavement layer desponds on the type of mineral aggregate. In 1999, while rebuilding road infrastructure in Kielce (Poland), a SMA wearing coarse layer with hydrated lime was placed on the town’s main streets. SMA mixture contained 63% of quartzite aggregate. The hydrated lime was dosed into the SMA mixture to replace 30% of the filler mass. The pavement surface condition after 12 years life was very good. The hydrated lime additive was found to have a positive effect on water resistance of SMA pavement.