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Home > Publications > International Concrete Abstracts Portal
Showing 1-2 of 2 Abstracts search results
Document:
CI3211Suprenant
Date:
November 1, 2010
Author(s):
Bruce A. Suprenant and Ward R. Malisch
Publication:
Concrete International
Volume:
32
Issue:
11
Abstract:
Isolation joints are the most common detail for slabs-on-ground that abut foundations. In theory, isolation joints allow the slab to move up or down without restraint when soil settlement or expansion is uniform. Because there is no restraint to movement of these floating slabs, no stress is generated in the concrete and no cracking is expected. In practice, soil movement is often nonuniform and differential soil settlement or expansion creates stress in the slab that can lead to cracking. Soil movement can also lead to slab elevation changes that cause problems other than cracking. When soil settlement is a concern, the specifier must decide whether the slab should float to reduce the possibility of restraint and cracking or whether the slab should be supported on or attached to the foundation wall to maintain elevation control.
SP164-25
November 1, 1996
Subrata Datta, Mukul Ray and Tarak Nath Mitra
Symposium Papers
164
This paper deals with the very interesting subject of replacement of Expansion Joints of a 50 year old balanced cantilever steel bridge by judiciously using a set of reinforced elastomeric slab seal type expansion joint. The expansion joints installed 50 years ago have been corroded and eroded with time, damaging even the replacement systems which might have been provided originally. As the replacement is being done on a bridge which is on regular use the entire work is being carried out in the night only. Care has been taken to ensure possibility of replacement of the elastomer slab seal at later dates, if necessary, by providing stainless steel fixing bolts nuts and stainless steel bed plates. The specification and methods used for fixing reinforced elastomer slab seal units have been elaborately dealt with in this paper. The paper also contains four drawings and three photographs showing various relevant details of the bridge and the expansion joints.
DOI:
10.14359/14311
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