Laboratory Testing of Precast Paving Notch System

Bridge approach pavement settlement and the resulting formation of ‘bumps’ at the end of bridges is a recurring problem on a number of Iowa bridges. One of the contributing factors in this settlement is failure of the bridge paving notch. A paving notch (also known as a corbel or a paving support) consists of a horizontal shelf constructed on the rear of a bridge abutment and is used to support the adjacent roadway pavement. The conventional repair procedure for this problem typically consists of removing the deteriorated paving notch concrete while preserving as much of the existing reinforcing steel as possible; construction of wood forms; and placement of a cast-in-place (CIP) concrete paving notch followed by replacement of the approach slab pavement. As an alternative to the conventional paving notch construction, a precast paving notch system was proposed. The Iowa State University (ISU) Bridge Engineering Center (BEC) performed full-scale laboratory testing of the proposed paving notch replacement system. The objective of the testing program was to verify the structural capacity of the proposed precast paving notch system and to investigate the feasibility of the proposed solution. This report describes the laboratory testing procedure and discusses its results.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: 12p

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Filing Info

  • Accession Number: 01496797
  • Record Type: Publication
  • Created Date: Sep 30 2013 11:23AM