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PMSS Project Details


Project ID:FHWA-PROJ-10-0063
Project Name: Grout Performance in Staged Construction Connections
Status: Completed
Last Name:Graybeal
First Name:Benjamin A (Ben)
Office: Office of Infrastructure Research and Development
Team:Bridge and Foundation Engineering Team
Roadmap/Focus area(s): Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:This research aims to identify parameters critical to the performance of field-cast grout systems used in staged construction connections. The grout bondability performance will be assessed in terms of the frequency and amplitude of the movement applied to embedded elements during the curing process.
Laboratories: Structures Laboratory
Concrete Laboratory
Start Date: October 1, 2010
End Date: May 31, 2012
Goals:The objective of this research is to assess the performance of field-cast grouts, which fill bridge deck staged construction connections. These connections frequently connect between loaded and unloaded portions of the bridge, resulting in differential deflection between the sides of the connection prior to grout curing. The performance of the connection may be impacted by any deformations induced into connecting elements embedded in the grout.
Test Methodology: Fabricate mockups of connections while continuously applying movement to embedded elements. After the grout has reached a predefined strength, complete pullout tests on embedded bars.
Expected Benefits:Assist in the development of recommendations for dynamic loads during staged construction of bridges.
Deliverables:1. Name: Influence of Differential Deflection on Staged Construction Deck-Level Connections
Product Type(s): Research report, Technical report
Description: Full report covering results of research project. Citation:Swenty, M., and Graybeal, B., “Influence of Differential Deflection on Staged Construction Deck-Level Connections,” FHWA, U.S. Department of Transportation, Report No. FHWA-HRT-12-057, 2012, p 82 (National Technical Information Service, Accession No. PB2012-111528).
Publication URL(s):
2. Name: Influence of Differential Deflection on Staged Construction Deck-Level Connections
Product Type(s): Techbrief
Description: TechBrief summarizing the findings of the research project.
Publication URL(s):
Keywords: Concrete Structures
Subject Areas: Bridges and other structures