01151062

Component

https://doi.org/10.3141/2131-14

http://scholar.google.com...okes&publication_year=2009

An experimental study evaluated the improvement in the bond of fiber-reinforced polymer (FRP) and concrete to dry and wet substrates from applied pressure. In the study, 12 full-sized pile specimens, including four controls, were wrapped by using two different glass FRP systems—a prepreg and a wet layup—and two different layouts typically used for unidirectional and bidirectional fibers. Wrapping was conducted inside a partially filled tank to ensure that the bonded areas of the dry and wet regions were identical. Sustained pressure was maintained during curing by using pressure or vacuum bagging. Bond improvement was evaluated from more than 400 pull out tests. Results showed that external pressure led to improved bond in both the dry and submerged regions. However, vacuum bagging was better for prepreg systems, whereas pressure bagging was better for wet layups. Transverse fiber layout typically used with bidirectional fibers gave better bond in controls where no external pressure was applied.

01147493

09-2630

English

pp 145-154

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309142649

Print

Figures (7) ; Photos (4) ; References (11) ; Tables (2)

Bond strength (Materials); Columns; Concrete; Fiber reinforced plastics; Glass fiber reinforced plastics; Pull out test; Support piles

External pressure; Fiber reinforced polymer wraps; Vacuum bagging

Bridges and other structures; Design; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods

TRIS, TRB, ATRI

Feb 22 2010 12:48PM

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• Proposal for Concrete Compressive Strength Up to 18 ksi (124 MPa) for Bridge Design
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