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International Concrete Abstracts Portal

Showing 1-3 of 3 Abstracts search results

Document: 

104-M33

Date: 

May 1, 2007

Author(s):

Neven Krstulovic-Opara

Publication:

Materials Journal

Volume:

104

Issue:

3

Abstract:

Significant interest has been generated in recent years in the development, design, and construction of liquefied gas containment tanks, such as liquefied natural gas (LNG) tanks. Consequently, a large number of LNG tanks are planned for construction in the near future. Concrete is particularly well suited for construction of such tanks. Its properties and behavior at cryogenic temperatures (for example, –160 °C [–260 °F]), however, differs significantly from known behavior at room temperatures. This paper presents the effect of cryogenic temperatures on the stress-strain response, compression strength, tension strength, flexural strength, Young’s modulus, Poisson’s ratio, coefficient of thermal expansion, thermal conductivity, creep, and permeability. Available data indicate that concrete properties improve at cryogenic temperatures. The extent of improvement is highly dependent on moisture content.

DOI:

10.14359/18676

Document: 

86-M20

Date: 

May 1, 1989

Author(s):

O. A. Onabolu, ACI Materials Journal

Publication:

Materials Journal

Volume:

86

Issue:

3

Abstract:

Concrete tanks are used for storage of crude oil on land as well as offshore. In the latter case, the tanks are incorporated into the platform structures and are located at the base. The service conditions have been simulated, and the effect of concrete a

DOI:

10.14359/2387

Document: 

86-M15

Date: 

March 1, 1989

Author(s):

O. A. Onabolu

Publication:

Materials Journal

Volume:

86

Issue:

2

Abstract:

Concrete tanks are used to store crude oil on land as well as offshore. In the latter case, the tanks are incorporated into the platform structures and are located at its base. Under service conditions, the mechanical properties of the material may be impaired with time, thereby compromising the durability of the storage tanks and the serviceability of the structure. The variations in compressive strength, length change, and absorption characteristics of typical offshore concrete exposed to crude oil for 365 days have been investigated. They are reported in two series: exposure to crude oil at ambient temperature of about 20 C, and exposure at elevated temperatures of 45, 60, and 80 C. Studies have shown that the factors significantly affecting these properties are the curing conditions of the concrete prior to exposure, moisture conditions of the concrete at the time of exposure, and the temperature of storage of the crude oil. It has been found that the presence of pulverized fuel ash (pfa) in the concrete increases its resistance under exposure condition. This may be related to changes in the pore structure resulting from pozzolanic activities, as well as to the effect of "packing" of pfa particles in the microstructure.

DOI:

10.14359/2319

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