POSTTENSIONED CONCRETE PAVEMENT

This report covers the initial main-line installation of a posttensioned concrete pavement in Pennsylvania. A pavement thickness of only 6 inches was possible through the use of posttensioned strands in the slab. The installation was a single slab 500 feet in length and 24 feet wide. It rests on 3-in. bituminous concrete base and a 9-in. subbase, with a slip plane provided between the base and slab. There are 10 longitudinal strands in the slab as well as transverse reinforcement. The construction methods used and details of placement and materials are discussed. Concrete was placed over the strands by conventional slip-form paving equipment. Hydraulic jacking was used to apply tension in two increments during the curing period. Posttensioning promises to provide a crack-free pavement structure, thereby eliminating a source of deterioration and need for maintenance. It is too soon to make conclusions on the performance of this installation, although cracks have not appeared. The future of posttensioned pavement will depend mainly on cost of construction and benefits in relation to other pavement types.

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Filing Info

  • Accession Number: 00080980
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 26 1975 12:00AM