High-Performance/High-Strength Lightweight Concrete for Bridge Girders and Decks

Use of high-strength prestressed concrete girders and high-performance bridge decks has become accepted practice by many state highway agencies because of their technical and economic benefits. These girders and decks are generally manufactured with concrete made with natural normal weight aggregates. Use of manufactured lightweight coarse aggregates, such as expanded shale, slate, and clay to produce lightweight concrete offers the benefit of reducing the weight of the superstructure, leading to reductions in the size of girders, substructure, and foundations. These size and weight reductions facilitate shipping, handling, and construction or replacement of bridge elements, and result in economic benefits. Recent advances in high-performance/high-strength lightweight concrete have had limited application in bridge construction because of the lack of design and construction guidelines and concerns about material properties and their impact on performance. Research is needed to address the factors that significantly influence the design, constructability, and performance of high-strength prestressed concrete bridge girders and high-performance bridge decks and recommend changes to the AASHTO LRFD bridge specifications. These modified specifications will provide highway agencies with the information necessary for considering lightweight concrete mixtures that are expected to yield economic benefits. The objectives of this research are to (1) develop guide specifications for the use of lightweight concrete in high-strength prestressed concrete girders and in high-performance bridge decks and (2) recommend changes to the AASHTO LRFD Bridge Design and Construction Specifications relevant to high-strength lightweight concrete girders and high-performance lightweight concrete decks. It will deal with mixtures made with normal weight fine aggregates and manufactured lightweight shale, clay, or slate coarse aggregates to produce concrete with equilibrium density, as determined according to ASTM C 567, of not more than 125 pcf.

• Record URL:
  http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=481

Language

• English

Project

• Status: Completed
• Funding: $747880.00
• Contract Numbers:

  Project 18-15

• Sponsor Organizations:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001
• Project Managers:

  Hanna, Amir

• Performing Organizations:

  Virginia Polytechnic Institute and State University, Blacksburg

  Virginia Tech Transportation Institute
  3500 Transportation Research Plaza
  Blacksburg, VA  United States  24061
• Principal Investigators:

  Cousins, Thomas

• Start Date: 20070821
• Expected Completion Date: 0
• Actual Completion Date: 20120113
• Source Data: RiP Project 11827

Subject/Index Terms

• TRT Terms: Bridge decks; Bridges; Concrete; Construction; Design; Girders; High performance concrete; High strength concrete; Lightweight concrete; Load and resistance factor design; Research projects; Specifications
• Identifier Terms: National Cooperative Highway Research Program
• Uncontrolled Terms: Structural elements
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I30: Materials;

Filing Info

• Accession Number: 01464871
• Record Type: Research project
• Source Agency: National Cooperative Highway Research Program
• Contract Numbers: Project 18-15
• Files: RIP, USDOT
• Created Date: Jan 3 2013 2:51PM