Shrinkage of Latex-Modified and Microsilica Concrete Overlays

Abstract

Shrinkage performance was examined of Virginia Department of Transportation-approved latex-modified and microsilica concrete overlay mixtures. Research was conducted on both field-sampled and laboratory-fabricated restrained and unrestrained specimens. From crack and delamination surveys of sampled bridge decks and laboratory test results, a shrinkage performance-based specification for the Virginia Department of Transportation was developed. There was no significant difference between the unrestrained shrinkage values of latex-modified and microsilica concrete overlay mixtures for the specified time periods. Restrained microsilica concrete specimens generally cracked earlier and more frequently than restrained latex-modified concrete specimens. However, the bridge deck crack and delamination surveys show that conditions and quality of construction and type and frequency of traffic may have a greater effect on cracking than the overlay material.

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References

Aïtcin

P. C.

, Neville

A. M.

, and Acker

Integrated View of Shrinkage Deformation. Concrete International, Vol. 19, No. 9, Sept. 1997, pp. 35–41.

Shah

S. P.

, Ouyang

, Marikunte

, Yang

, and Becq-Giraudon

A Method to Predict Shrinkage Cracking of Concrete. ACI Materials Journal, Vol. 95, No. 4, July–Aug. 1998, pp. 339–346.

Soroushian

, and Ravanbakhsh

Control of Plastic Shrinkage Cracking with Specialty Cellulose Fibers. ACI Materials Journal, Vol. 95, No. 4, July–Aug. 1998, pp. 429–435.

Tazawa

, and Yonekura

Drying Shrinkage and Creep of Concrete with Condensed Silica Fume. Proc., 2nd International ACI-CANMET Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete, Vol. 2, Madrid, Spain, 1986, American Concrete Institute, Farmington Hills, Mich., 1987, pp. 903–921.

Soroka

Portland Cement Paste and Concrete. Macmillan, New York, 1979, pp. 136–139.

Buchanan

P. M.

Shrinkage of Latex-Modified and Microsilica Concrete Overlay Mixtures. M.S. thesis. Virginia Polytechnic Institute and State University, Blacksburg, 2000. Scholar.1.6.vt.edu/thesis/available/etd-05222002-162704/.