Crushing and Processing Reclaimed Concrete for City of Saskatoon Rehabilitation of Road Structures.

In 2009, the City of Saskatoon implemented the "Green Streets" Infrastructure Program. This paper evaluated the technical results of crushing and processing stockpiled hot mix asphalt concrete (HMAC) and Portland cement concrete (PCC) materials used in the City of Saskatoon "Green Streets" Infrastructure Program for road reconstruction. Given the limited success of conventional crushing technologies, an innovative impact crusher with a screener and magnetic metallic extruder was employed to process the concrete rubble materials for the City of Saskatoon's "Green Streets" Infrastructure Program. Impact crushing production rates averaged between 100 MT and 300 MT per hour, generating up to five alternate sized materials at once with minimal waste in 2009. Recycled HMAC and PCC materials produced in 2009 had at least 30 percent improved mechanistic mechanical properties than virgin source counterparts. Through the implementation of the City of Saskatoon's "Green Streets" Infrastructure Program, on-site recycling methods and recycled materials were used to construct a number of test sections over the 2009 construction season using recycled HMAC and PCC in the road structures. (A) For the covering abstarct of this conference see ITRD number E220308.