TRID
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Title:

BOND OF EPOXY COATED PRESTRESSING STRAND. FINAL REPORT

Accession Number:

00464613

Record Type:

Monograph

Availability:

National Technical Information Service

5301 Shawnee Road
Alexandria, VA 22312 USA

Abstract:

The effect of the epoxy coating on transfer length and development length properties of three diameters of prestressing strand was investigated. The epoxy coated prestressing strand was seven-wire strand coated with an epoxy and impregnated with a crushed glass grit. Approximately sixty specimens were cast to determine the transfer length and development length of both epoxy coated and bare prestressing strand. The transfer length was determined by measuring concrete strains before and after release. Development lengths were determined through a series of flexural tests. A cyclic loading was applied to twelve specimens to determine the effect of fatigue on bond of epoxy coated strand. Analytical expressions were developed for estimating transfer length and development length. The transfer length model was based on plastic and elastic zones of bond stress within the transfer length. The development length model was based on the transfer length model plus a plastic bond stress relationship throughout the flexural bond length. The experimental and analytical results from this research were compared to the results in the literature and previously proposed bond provisions.

Report Numbers:

FHWA/NC/87-005

Contract Numbers:

ITRE 23241-85-3

Corporate Authors:

North Carolina State University, Raleigh

Center for Transportation Engineering Studies, P.O. Box 7908
Raleigh, NC 27695 USA

North Carolina Department of Transportation

P.O. Box 25201, 1 South Wilmington Street
Raleigh, NC 27611 USA

Federal Highway Administration

1200 New Jersey Avenue, SE
Washington, DC 20590 USA

Authors:

Cousins, T E
Johnston, D W
Zia, P

Pagination:

191 p.

Publication Date:

1986-12

Features:

Appendices (3) ; Figures; References; Tables

Old TRIS Terms:

Subject Areas:

Finance; Highways; Materials; I32: Concrete

Files:

TRIS, USDOT, STATEDOT

Last Modified:

May 31 1988 12:00AM