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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations



Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-10-0026
Project Name:   Assessment of Prestressing Strand and Lightweight Concrete via the Standard Test for Strand Bond (STSB)
Project Status:   Active
Start Date:  June 1, 2010
End Date:  December 31, 2014
Contact Information
Last Name:  Graybeal
First Name:  Benjamin A (Ben)
Telephone:  202-493-3122
E-mail:  benjamin.graybeal@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Bridge and Foundation Engineering Team [HRDI-40]
Program:   Innovative Bridge Research and Deployment
Laboratory:   Structures Laboratory
Project detail
Roadmap/Focus area(s):   Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:   Recently, more emphasis has been placed on the use of lightweight or specified density concrete as a solution for several bridge applications. The properties of these materials result in applications that have lighter transportation loads, require smaller construction equipment, and result in extended span ranges and reduced inertia forces. The American Association of State Highway and Transportation Officials specifications for designing with these materials have not been significantly updated since the 1960s. This work, along with the work of National Cooperative Highway Research Program Project 18-15, intends to update the specifications appropriately for the modern version of these materials. This specific portion of the overall program focuses on prestressing strand bond to lightweight concrete.
Goals:   This project aims to quantitatively assess the bond slip performance of the specific prestressing strand embedded within the full-scale test girders tested in the project titled "Transfer and Development Length Behavior of Lightweight High Performance Concrete Girders." The testing will be completed through the newly developed Standard Test for Strand Bond.
Test Methodology:   Implementation of the Standard Test for Strand Bond
Expected Benefits:   This results of this project will provide two benefits. First, the results will feed into the larger study of the structural performance on lightweight concrete, thus allowing for a clearer assessment of strand bond to lightweight concrete in prestressed girders. Second, the results from this test will illuminate the value of the newly developed standard test for strand bond, a test method that is gaining traction across the United States as the primary method for assessing strand bond.
FHWA Topics:   Roads and Bridges--Design
TRT Terms:   Concrete Structures
Mechanical Tests
FHWA Disciplines:   Design
Subject Areas:   Bridges and other structures


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