Facts & Figures Book - KPI-JCI

Screenin gAVAILABILITY OF RECYCLEDASPHALT PRODUCTS (RAP)Due to the benefits of milling in cities and on highways, morerecycle is becoming available. Inlays are becoming commonplacein most states where 1-1/2” to 2” of material is milledand a new surface is installed in the removed area withoutincreasing the elevationof the road. Thistype of construction isvery beneficial sincethe inlay area allowscontainment of thenew mix on each side,resulting in superiorjoints. Also, it permitsconstruction tobe done at night withminimum disruption tothe traveling public, F8. This type of construction results inenough material being available to produce 100% recycle mixand although this is not practical, it results in increasing quantitiesof RAP.In addition, with rebuilding of sewers, electrical lines, and otherutilities below the roadway, numerous amounts of ripped-upmaterial is available. Milling on parking lots is often done ratherthan complete removal, since material can be milled to an exactelevation and the price of milling is much less than total excavationand re-grading prior to placing a new surface. This alsoresults in a large quantity of material being available. With thepassage of each year, it is our opinion that the amount of recycleavailable will increase steadily and more efforts must be madeto increase the quality of recycle placed into hot mix asphaltwithout sacrificing quality.172