Bloomington Road is a two-lane roadway that carries more than 10,000 AADT with approximately 10 % heavy commercial vehicle mostly hauling aggregate to the Greater Toronto Area. Prior to rehabilitation, the pavement was severely oxidized and thermal cracking was extensive. The pavement design included an in-place recycling technique to mitigate reflective cracking and 100 mm of new surfacing HMA. The partial depth recycling process was selected using a rapid curing recycling system to accelerate the build up of cohesion of the recycled material. A heavy duty dense graded HMA was selected as a binder course, while a fine-graded SMA was selected as a thin surfacing course. Both HMA mixes were tested for rutting using a European rut testing device to ensure rut resistance performance. Both mixes were produced using polymer-modified bitumen to mitigate both thermal cracking and permanent deformation. This paper presents the Bloomington Rd. project including details related to the roadway characteristics, the pavement design, the material and process selection and the field construction. Finally, the paper provides performance information of the various techniques with an emphasis on the surface characteristics of fine-graded SMA, including skid resistance and noise reduction. For the covering abstract of the conference see ITRD number E211521.
Samenvatting