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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 33 Abstracts search results
Document:
SP109
Date:
August 1, 1988
Author(s):
Editor: V.M. Malhotra
Publication:
Symposium Papers
Volume:
109
Abstract:
SP109 The book offers information on a variety of subjects such as: The durability of concrete containing supplementary cementing materials; the durability and corrosion of reinforced concrete subjected to a marine environment; and the repair, design and construction of concrete structures in a marine environment. Whether you are building a new concrete structure in marine environment, or repairing an old one--as an engineer you need the wealth of information contained within the 32 papers presented in this important symposium volume.
DOI:
10.14359/14142
SP109-29
T. W. R. Taylor and H. R. Woodhead
The Port of Vancouver, Canada, is the owner of one of the world's newest and most unique heliports. This state-of-the-art floating facility is constructed from styrofoam-filled cellular concrete. The analysis and design of the structure is developed in this paper. Some of the interesting aspects of construction are highlighted and the economic benefits of this use of reinforced concrete are discussed.
10.14359/3054
SP109-09
T. Oshiro and S. Tanigawa
A test building constructed in 1984 was exposed to marine environment under sub-tropical weather of Okinawa, Japan. Concentration of chloride ions in concrete, changes in the half cell potentials with time, and protective effects of surface coatings were investigated. Diffusion of chloride ions was monitored using Fick's law. The diffusion equation was converted to difference equation and solved under the initial condition in terms of time. These results were compared with those of the field, and the relationships were obtained.
10.14359/1968
SP109-04
B. Espelid and N. Nilsen
Experience and research have shown that reinforcement in submerged concrete appears to be well protected against corrosion. Questions have been raised as to whether this durability will be present in structures subject to dynamic loads and in structures spanning through several environment zones. To clarify the effect of loading, eight concrete beams were exposed dynamically loaded at a seawater laboratory. Four of the specimens were allowed to corrode freely, while the rest were cathodically protected. To study the corrosion behavior of multizone exposed concrete structures, eight concrete columns with a diameter of 0.6 m and a height of 5 m were installed in the sea. One of the main objectives was to study the cathodic current density demands of embedded steel exposed to different environmental zones and of multizone exposed embedded steel. This paper presents the results from the laboratory and field tests, and the main conclusion is that the corrosion conditions found on a multizone exposed concrete structure differ from those found on a completely submerged structure.
10.14359/1927
SP109-15
S. G. Millard
Coastal defenses in the United Kingdom have often been constructed using natural stone armor or plain concrete armor. This paper reports on the novel use of slender section reinforced concrete units in the marine splash zone. A program of monitoring the durability performance of the coastal defenses was commenced by the University of Liverpool in 1985. A visual survey together with electrical potential and resistivity monitoring of a sample of 51 units is conducted annually. Overall, the slender reinforced concrete units are performing very well both hydraulically and structurally. Some minor impact damage soon after construction has been easily repaired using the steel reinforcement as a bonding key. The results of three years of potential monitoring have shown that the steel reinforcement has been passivated in all but one of the sample units. The resistivity monitoring has shown that the fly ash concrete has a significantly higher resistivity than the ordinary concrete and hence; its use should lead to lower rates of corrosion. Further studies on the durability of reinforced concrete in the splash zone are in progress.
10.14359/1996
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