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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 61 Abstracts search results
Document:
SP94-39
Date:
July 1, 1987
Author(s):
C. Wohlk
Publication:
Symposium Papers
Volume:
94
Abstract:
In Denmark, all important concrete bridges are waterproofed and asphalt paved. Joints in bridge surfacing are important details as leakage often starts along the edges and the expansion devices. Practice has shown that with a proper sealant, joint leakage is much more apt to occur between the sealant and the joint sides than due to a break in the sealant. A low elastic modulus of the sealant will reduce the tension between the sealant and the joint sides and is consequently an important property. A suitable primer should always be used, and the shape factor of the joint should be restricted to about 1:1. The present Danish specifications for joint sealants and primers are quoted and discussed. Important details of the workmanship are also specified. Measurements of typical movements in bridge surfacings are reported. Research concerning new specifications is presented. An elaborate device for testing the deformation properties of joint sealants at different temperatures down to -20 C has been constructed. It is intended to use the device to study the influence of such characteristics as aging, water, alkali, and joint geometry. It is expected that the investigation will result in new and more relevant specifications and easier control procedures. The research is directed toward bridge joints, but the results are applicable to joints in concrete roads as well.
DOI:
10.14359/1713
SP94-40
P. Dupeuble
Diaphragm walls owing to their method of construction are discontinuous structures. A new technology for the formation of joints between panels has been developed. This new process allows for the construction of diaphragm walls with mechanical and watertight continuity. Within the last 30 years, diaphragm walling has become a construction technique frequently used for the design of major underground works, often in waterbearing grounds, e.g., quay qalls, excavation supporting, and shaft lining.
10.14359/1714
SP94-32
H. Eggert
Since some national standards on bridge bearings have been issued and a certain level of knowledge seems to have consolidated, the time has come to prepare an ISO Standard. The most important elements that should be part of such an ISO Standard are listed. Contradictions between existing national standards should be clarified and eliminated. Outlived technology should not be part of an international standard while national standards still may specify such bearings for local reasons.
10.14359/3757
SP94-56
J. Bugler
This paper describes field application problems experienced during the execution of a joint resealing program initiated within the limits of Region 10 (Nassau and Sufflok Counties) in the early 1980s. It describes what was done to overcome these problems. Solutions to such problems involved equipment modification and improved inspection technique. These modifications resulted in the virtual elimination of joint overfilling and a ten-fold performance improvement with regards to first-year intermittent bond adhesion failure. Worker safety and protection are discussed.
10.14359/3767
SP94-57
J. Breen
The paper is the text of the keynote address presented at the Second World Congress on Joint Sealing and Bearing Systems for Concrete Structures. The speech centers on Breen's structural engineering experience with reinforced and prestressed concrete and long-span bridges.
10.14359/3777
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