Cold In-place Recycling (CIR) processes an existing asphalt pavement in situ, sizes it, mixes in additional asphalt cement, and lays it back down without off-site hauling and processing. The added asphalt cement is typically emulsified asphalt. An innovative development in CIR technology is the use of expanded asphalt, rather than emulsified asphalt to bind the mix. The Ministry of Transportation Ontario (MTO) constructed a trial section of CIR with expanded asphalt in July 2003. The 5 km trial section of CIR with expanded asphalt was constructed adjacent to 7 km of conventional CIR. Falling Weight Deflectometer (FWD) testing was carried out immediately after construction and in the year following construction to compare the CIR and CIR with expanded asphalt technologies and to assess the change in strength of the pavement structure over time. Evaluation of pavement roughness and rutting was also carried out using MTO's Automatic Road Analyzer (ARAN). For the covering abstract of this conference see ITRD number E211426.
Samenvatting