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Title: EFFECT OF MOVING TRAFFIC ON FRESH CONCRETE DURING BRIDGE-DECK WIDENING
Accession Number: 00369285
Record Type: Component
Availability: Find a library where document is available Abstract: Traffic in lanes adjacent to a deck that is being widened or reconstructed causes deflections and vibrations in the fresh concrete deck. A study of the effects of these disturbances in concrete decks is reported here. Decks in service for years were inspected for signs of deterioration; deflections and vibrations were measured during concrete placement and initial curing; bridge-deck cores were analyzed for cracks and signs of bonding problems in the reinforcing steel and tested for strength and soundness. Laboratory beams were constructed and tested to simulate a transverse strip of a deck slab. Periodic deflections and vibrations were applied from time of casting to one day. No deterioration that could be attributed to traffic during construction and curing of the decks was found in existing decks. The study of the cores showed no difference in cracking in cores taken from disturbed areas of the deck from that in cores taken from undisturbed areas. There was evidence of creation of a void in the new concrete around certain rebar dowels bent at right angles in a horizontal plane on emerging from the old concrete. This situation was found only in cores taken at the joint between old and new concrete, and only one bridge of all that were studied had this bent-dowel detail. The study shows that no detrimental effects should be expected in deck concrete supported by steel and prestressed concrete beams spanning up to about 100 ft when the decks are widened or reconstructed under normal traffic. (Author)
Supplemental Notes: Publication of this paper sponsored by Committee on Structures Maintenance. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Snow control, traffic effects on new concrete, and corrosion Monograph Accession #: 01411662
Authors: Furr, Howard LFouad, Fouad HPagination: pp 28-36
Publication Date: 1982
Serial: ISBN: 0309033632
Media Type: Print
Features: Figures
(14)
; Photos
(6)
; References
(5)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Freight Transportation; Highways; Materials; I32: Concrete
Files: TRIS, TRB
Created Date: Jan 31 1983 12:00AM
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