Field Demonstration of Tendon Imaging Methods

Dukeman, David; Freij, Hani; Sagüés, Alberto A.; Alexander, Christopher

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Field Demonstration of Tendon Imaging Methods

2019-07-01
By Dukeman, David ; Freij, Hani ; Sagüés, Alberto A. ; ...

File Language:

English

Details

Creators:

Dukeman, David ; Freij, Hani ; Sagüés, Alberto A. ; Alexander, Christopher
Corporate Creators:

University of South Florida. Department of Civil and Environmental Engineering ; University of South Florida. College of Engineering
Corporate Contributors:

United States. Department of Transportation. University Transportation Centers (UTC) Program ; Florida. Department of Transportation
Subject/TRT Terms:

Field Tests Grout Highway Bridges Image Analysis Nondestructive Tests Prototypes Sensors Tendons (Materials)
Resource Type:

Tech Report
Geographical Coverage:

Florida ; United States
Contracting Officer:

Alexander, Christopher; Sagüés, Alberto
Corporate Publisher:

Florida. Department of Transportation
Abstract:

Inadequate grouting is associated with corrosion of post-tensioning steel in grouted tendons used in construction applications. A nondestructive method capable of revealing grout deficiencies of external tendons was developed under concurrent Florida Department of Transportation (FDOT) Project BDV25-977-24. The method uses impedance and magnetic measurements to produce an image of the cross-section of the tendon, flagging air voids and other deficiencies in the grout portion that is between the outer strand bundle envelope and the inner surface of the tendon polymer duct. In this project an operating prototype of a unit using the method was designed and constructed, field demonstrated in FDOT bridges, and delivered for use by FDOT. The unit is capable of operation in commonly used 4.5-inch diameter tendons, tolerant of elliptical tendon perimeters, and designed for fast and economic replication. Operation does not require highly specialized personnel. This report describes unit design, field and laboratory experience, and operating instructions of a unit constructed and delivered as part of the project.
Format:

PDF
Funding:

BDV25-977-52
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:b8313c59c5056b7be55ba586393c69191d99b6e18a1cb7f8d5f881f370f6faee
Download URL:

https://rosap.ntl.bts.gov/view/dot/63060/dot_63060_DS1.pdf
File Type:

[PDF - 2.26 MB ]

File Language:

English

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