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Title: Thermal Performance Of A Fire Resistant Coating Applied To Prestressed Concrete
Author: Harold R. Wesson, Jerry L. Lott, Rubin Feldman, Jack L. Closner
Source: American Gas Association 1978
Year Published: 1978
Abstract: Prestressed concrete has been used in the construction of hydrocarbon and LNG storage tanks for a number of years. The prestressed tanks are wrapped with a wire which is stressed to about 150,000 psi to achieve a prestressed tank design with the desired structural properties. However, in the wire temperature range of 500 to 600 F, the prestressing wire begins to relax. As the temperature of the prestressing steel wire continues to increase, its relaxation continues until the structural integrity of the concrete storage tank is jeopardized. If such prestressed storage tanks could be exposed to the heating effects from a fire in the tank environs for a sufficiently long exposure period, it would be necessary to provide some measure of exposure control for the tank structure.

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