A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Precast Concrete Pavement Innovations
Repair and rehabilitation of the aging highway infrastructure continues to be a challenging endeavor for all US highway agencies. Thousands of miles of highway pavements need rehabilitation, yet many of these carry over 100,000 vehicles/day, including a large percentage of trucks. Extended lane closures must be therefore avoided to prevent compounding congestion--that means that rehabilitation work must be completed rapidly. While many projects have been completed using rapid-setting concrete, results have been inconsistent. Precast concrete pavements (PCP) have been shown to be promising alternatives. Concrete mixture requirements for PCP panels are similar to those specified by transportation departments for cast-inplace concrete pavements. An advantage of PCP is that early-age concrete volume changes associated with drying shrinkage are not of significant concern, because these effects take place over a smaller panel length and typically before panel installation. Joint spacing is an important design parameter for PCP. For isolated repairs, the transverse pavement joint spacing may be limited by the extent of the repair.
Precast Concrete Pavement Innovations
Repair and rehabilitation of the aging highway infrastructure continues to be a challenging endeavor for all US highway agencies. Thousands of miles of highway pavements need rehabilitation, yet many of these carry over 100,000 vehicles/day, including a large percentage of trucks. Extended lane closures must be therefore avoided to prevent compounding congestion--that means that rehabilitation work must be completed rapidly. While many projects have been completed using rapid-setting concrete, results have been inconsistent. Precast concrete pavements (PCP) have been shown to be promising alternatives. Concrete mixture requirements for PCP panels are similar to those specified by transportation departments for cast-inplace concrete pavements. An advantage of PCP is that early-age concrete volume changes associated with drying shrinkage are not of significant concern, because these effects take place over a smaller panel length and typically before panel installation. Joint spacing is an important design parameter for PCP. For isolated repairs, the transverse pavement joint spacing may be limited by the extent of the repair.
Precast Concrete Pavement Innovations
Shiraz Tayabji (author) / Sam Tyson
2017
Article (Journal)
English
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