Effects of Construction Procedures on Bond in Bridge Decks

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Issue Date
1983-06Author
Donahey, Rex C.
Darwin, David
Publisher
University of Kansas Center for Research, Inc.
Type
Technical Report
Is part of series
SL Report;83-1
Published Version
https://iri.ku.edu/reportsMetadata
Show full item recordAbstract
The effects of consolidation method and two-course construction on concrete-steel bond in concrete bridge decks are studied as functions of slump, bleed, and depth of slab. The consolidation was varied by vibrator spacing and insertion time. Four top covers were studied: 3/4, 1, and 3 in. monolithic and 3 in. two-course. Bond test specimens were of two types: shallow, with 8 in. of concrete below the reinforcement, and deep, with 24 in. of concrete below the reinforcement. All specimens were modified cantilever beam specimens. Concrete densities were obtained using core samples. Based on the experimental work, high density internal vibration provides improved bond over low density internal vibration. 3 in. monolithic cover provides higher bond strength than 3 in. two-course cover. Increased concrete slump has a negative effect on bond strength for top-cast reinforcement. Deep specimens made with stiff, well consolidated concrete can provide the same bond strengths as shallow specimens.
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Citation
Donahey, R.C., and Darwin, D., "Effects of Construction Procedures on Bond in Bridge Decks," SL Report 83-1, The University of Kansas Center for Research, Inc., Lawrence, Kansas, June 1983, 32 pp.
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