Study to Determine Properties of Untreated RAP (Reclaimed Asphalt Pavement) Materials for Use as a Base

摘要

The Georgia Department of Transportation has sizable stockpiles of reclaimed asphalt pavement (RAP). Some of this material is unsuitable for use in hot recycled mix. One possible use for this material other than in recycled hot mix would be as a base material. The project compared the performance of untreated RAP material to conventional graded aggregate base (GAB) by looking at the compactibility and California Bearing Ratio (CBR) of RAP versus conventional GAB. The untreated RAP did not compact well when compared to GAB. The RAP only compacted from 92 to 94 percent of maximum density. The RAP base also yielded CBR values that were only a fraction of the CBR values for GAB from nearby quarries.