Post-tensioning technologies.

Details

• Creators:
  Jenkins, Ryan W. ; Kreger, Michael E. ; Frosch, Robert J.
• Corporate Creators:
  Purdue University. Joint Transportation Research Program ; Indiana. Dept. of Transportation
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Bridge Construction Case Studies Certification Contractors Durability Inspectors Posttensioning Specifications Standards Training Programs
• Publication/ Report Number:
  FHWA/IN/JTRP-2013/04
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Indiana. Dept. of Transportation
• Abstract:
  Post‐tensioned bridge construction has become increasingly popular and financially competitive with traditional prestressed concrete
  
  and steel plate girder bridges. Unfortunately, Indiana has experienced several construction‐related problems in the few post‐tensioned
  
  structures built, some of which have caused significant long‐term durability concerns. Indiana’s problems have generally been attributed
  
  to a lack of a standard set of specifications for post‐tensioned construction as well as inexperience and inadequate training of
  
  contractors and inspectors. These types of issues, however, were once more prevalent throughout the industry and much work has been
  
  accomplished in recent years to address these issues. This research program had two primary objectives: (1) to improve the quality of
  
  post‐tensioned bridge construction in Indiana and (2) to provide the State with more confidence when using this type of construction.
  
  First, past problems related to post‐tensioned construction were identified, and for each, case studies were conducted. Each case study
  
  includes an overview of the bridge, a summary of the problems related to post‐tensioning, and possible sources and remedies to those
  
  problems. Next, a standard post‐tensioning construction specification was developed. The specification addresses problems specific to
  
  Indiana which were found in the case studies and common problems experienced in the industry as a whole. Specifically, the
  
  specification addresses industry standards of practice, requirements for certification and experience of personnel, and proper testing
  
  and sampling procedures. In addition, specific recommendations are provided for training programs and certification of INDOT
  
  construction personnel to ensure they are properly trained to inspect post‐tensioned construction.
  
  
• Format:
  PDF
• Funding:
  SPR-3631
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7f1ed78c2b02f93e38e9b9d406c99e1c4d3f689ae98df8959b4d50cadebd70e9
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26554/dot_26554_DS1.pdf
• File Type:
  [PDF - 2.30 MB ]