Investigation of the internal stresses caused by delayed ettringite formation in concrete.

Burgher, Bedford; Thibonnier, Arnaud; Folliard, Kevin J.; Ley, Tyler; Thomas, Michael; University of Texas at Austin. Center for Transportation Research

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Investigation of the internal stresses caused by delayed ettringite formation in concrete.

2008-11-01
By Burgher, Bedford ; Thibonnier, Arnaud ; Folliard, Kevin J. ; ...

[PDF-1.99 MB]

English

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Details:

Alternative Title:

Project title: Extending service life of large or unusual structures affected by concrete deterioration
Creators:

Burgher, Bedford ; Thibonnier, Arnaud ; Folliard, Kevin J. ; Ley, Tyler ; Thomas, Michael

Burgher, Bedford ; Thibonnier, Arnaud ; Folliard, Kevin J. ; Ley, Tyler ; Thomas, Michael Less -
Corporate Creators:

University of Texas at Austin. Center for Transportation Research
Corporate Contributors:

Texas. Dept. of Transportation. Research and Technology Implementation Office
Subject/TRT Terms:

[+]

Concrete Concrete--Deterioration Concrete Pavements Deterioration Ettringite Ettringite--Texas Pavements, Concrete--Texas--Design And Construction
Publication/ Report Number:

FHWA/TX-09/0-5218-1
Resource Type:

Tech Report
Geographical Coverage:

Florida
Edition:

Technical report; 12/1/2004-8/31/2008.
Corporate Publisher:

University of Texas at Austin. Center for Transportation Research
Abstract:

Delayed ettringite formation (DEF) in concrete has been identified in recent as a significant cause of deterioration in

some of the reinforced concrete infrastructure in Texas. This report is part of a research project, TxDOT project

5218, to investigate the possible long-term structural and durability related effects of DEF in such structures. The

focus of this particular report is the determination of the internal stresses caused by DEF which at this point in time

are not known. The research presented here began by first looking at past and recent research involving concrete

deterioration due to alkali-silica reaction (ASR) and discussing the results of a comparative study between DEF and

ASR affected concrete with different dosages of steel fibers to provide restraint. The study then went on to directly

study the stresses caused by DEF in a new testing methodology that was developed using a Hoek tri-axial load cell

to provide a direct measurement of the confining stress necessary to stop DEF induced expansion. In addition to the

steel fiber and Hoek cell testing, reinforced concrete elements were made to study the structural effects of DEF.

Lastly, a series of tests performed at the University of New Brunswick were performed to assess the stresses

generated by DEF and the requisite levels of confinement needed to resist these stresses. The following report

outlines the process, results, and lessons learned from the conducted tests.
Format:

PDF
Funding:

0-5218
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:3380fe62f742467d468788f0e2afad7f5cf90ddfed47ac3670c95a787c8be1ff
Download URL:

https://rosap.ntl.bts.gov/view/dot/17424/dot_17424_DS1.pdf
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Investigation of the internal stresses caused by delayed ettringite formation in concrete.

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