Loading...
Effects of Construction Procedures on Bond in Bridge Decks
Donahey, Rex C. Darwin, David
Donahey, Rex C.
Darwin, David
Citations
Altmetric:
Abstract
The effects of con so I i dati on method and two-course construction on concrete-steel bond in concrete bridge decks are studied as functions of slump, b I eed, and depth of slab. Consolidation was varied by vi bra tor spacing and insertion time. Four top covers were studied: 3/4, I ' and 3 inch mono I ith ic and 3 inch two-course. Bond test specimens were of two types: sha I I ow, with 8 inches of concrete below the reinforcement, and deep, with 24 inches of concrete below the reinforcement. All specimens were modified canti I ever beam type specimens. Concrete densities were obtai ned using core samples. Based on the experimental work, high density internal vibration provides improved bond over low density i nterna r vibration. 3 inch mono I ithic cover provides higher bond strength than 3 inch two-course cover. Increased concrete slump has a negative effect on bond strength for top-cast reinforcement. Deep specimens made with stiff, well conso I i dated concrete can provide the same bond strengths as sha I I ow specimens.
Description
Date
1983-01
Journal Title
Journal ISSN
Volume Title
Publisher
University of Kansas Center for Research, Inc.
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Donahey, R.C., and Darwin, D., "Effects of Construction Procedures on Bond in Bridge Decks," SM Report No. 7, Project No. P 0255, The Kansas Department of Transportation, January 1983, 136 pp