The NASP Bond Test as a Predictor of Strand Bond, Transfer Length, and Development Length-Phase 2

The research team hypothesized that the North American Strand Producers (NASP) test could be used to evaluate bond of prestressing strand in concrete. Specifically, that the test would predict transfer and development lengths of strand in different types of concrete, such as self-consolidating concrete and high-volume fly ash concrete. The researchers found a reasonable correlation between the NASP test and measured transfer and development lengths, but because of the cost of full-scale specimen tests, the number of tests are limited. To provide additional data, the research team will model the bond of prestressing strand in concrete using finite element analyses. The purpose of the analyses is to perform parametric studies on the different variables to determine if a stronger correlation exists between the NASP test and transfer and development lengths of prestressing strand. Dr. K. Chandrashekhara - Curators' Professor of Mechanical and Aerospace Engineering - has significant expertise in analytical modeling of complex material behavior and will be added to the project to provide this expertise and strengthen this additional phase of the project.

• Record URL:
  http://transportation.mst.edu/research/r319/
• Supplemental Notes:
  • Contract to a Performing Organization has not yet been awarded.

Language

• English

Project

• Status: Completed
• Funding: $10000.00
• Contract Numbers:

  DTRT06-G-0014

  00040985

• Sponsor Organizations:

  Precast/Prestressed Concrete Institute

  200 W Adams Street, #2100
  Chicago, IL  United States  60606-6938

  Research and Innovative Technology Administration

  University Transportation Centers Program
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Principal Investigators:

  Volz, Jeffrey

• Start Date: 20110901
• Expected Completion Date: 0
• Actual Completion Date: 20130501
• Source Data: RiP Project 33616

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Finite element method; Fly ash; Prestressed concrete; Self compacting concrete; Testing
• Uncontrolled Terms: Prestressed strands; Transfer length
• Subject Areas: Bridges and other structures; Construction; Highways; I30: Materials;

Filing Info

• Accession Number: 01534221
• Record Type: Research project
• Source Agency: Center for Infrastructure Engineering Studies
• Contract Numbers: DTRT06-G-0014, 00040985
• Files: UTC, RIP
• Created Date: Aug 9 2014 1:00AM