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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 17 Abstracts search results
Document:
SP64-15
Date:
July 1, 1980
Author(s):
Robert W. Cusick and Clyde E. Kesler
Publication:
Symposium Papers
Volume:
64
Abstract:
The object of this research was to determine if the use of shrinkage-compensating concrete in bridge decks minimizes cracking and the subsequent spalling caused by rusting of the steel reinforcing. The simulated bridge deck specimens made with shrinkage-compensating cements did not crack, or had only a few cracks when compared to the specimens made with Type 1 cement. The rate of corrosion of the reinforcing was about the same for both of the found to be about 20 percent greater than that of the Type 1 concrete, but the chloride ion concentration was approximately the same at a given depth. The elimination of cracks by using shrinkage-compensating cement concrete will prevent the rapid corrosion of the reinforcement and subsequent spalling in a bridge that occurs at a crack, and extend the life of the deck before repairs are needed.
DOI:
10.14359/6682
SP64
Editor: William P. Liljestrom
SP-64 This symposium of 16 papers covers international developments, field service reports on existing installations and research. Reports on applications of shrinkage-compensating concrete in hydraulic structures, cold storage warehouse, slabs, bridge decks, oil well cementing, post-tensioned structures.
10.14359/14116
SP64-11
D.G. Calvert
A serious problem in well cementing is the failure of bond between the cement and the fomation or the pipe. Such fai ure may allow fluid and/or gas movement from one zone to another. Also, a poor bond may result in loss of produced materials, premature reservoir depletion, and unsatisfactory stimulation operations. A means of decreasing such problems is the introduction of expansive properties to the cement system and has been recognized for some time. The addition of salts and other means have been used for this purpose. The availability of expansive cements opened a new area of investigation. This paper compares the expans ion properties of shr inkage-compensating cements with other cements. Other properties such as pumping time, compressive strength, and bonding of the cement systems were evaluated
10.14359/6678
SP64-12
Mark W. Hoffman
All concrete structures are affected by shrinkage and creep; post-tensioning introduces elastic shortening as well. This paper compares the effect of volume changes on structures using expansive cement concrete and conventional cement concrete. The primary focus of the paper is to show that the use of expansive cement concrete can minimize the induced moments created by volume changes. A structural example is used to compare these effects. A series of concrete bars tested for the amount of expansion that occurs in restrained and unrestrained conditions is discussed. A computer program used to perform a stiffness analysis on frames using sectional properties and displacement loadings (shortening or expansion movements) is described.
10.14359/6679
SP64-13
Frank A. Randall, Jr.
Reports on a field survey of over 100 projects including parking structures, slabs on ground, and miscellaneous installations that used shrinkage-compensating cement concrete. Fifty nine of the projects were rated on the effectiveness in reducing drying shrinkage cracks and it was concluded that, on average, the cement was very effective. Six years later seventeen of them were re-examined and it was found that the cement was still very effective. Cracks are plotted on several plan drawings. A number of the projects were inspected several times within a year to determine the rate and extent of cracking. Some causes of cracking due to drying shrinkage are discussed. Twelve projects of portland cement concrete were also reported.
10.14359/6680
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