INVESTIGATION OF CONCRETE IN EISENHOWER AND SNELL LOCKS ST. LAWRENCE SEAWAY.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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It is concluded that the deterioration of the concrete that has manifested damage in certain parts of the Eisenhower Lock is the result of the exposure conditions to which it was subjected at a time when it had not attained sufficient maturity to resist these conditions. The exposure conditions are more severe than those to which any previous mass concrete structure is known to have been exposed. The severity results from the combination of three factors a the production in the concrete of an extreme, critical degree of saturation by water due to submergence of the affected portions of the structure during normal navigation operations, b the exposure of such critically saturated concrete to very severe freezing conditions after termination of navigation in the early winter, and c the prolonged exposure of the concrete to these severe conditions that allowed freezing to progress to a depth of several feet behind exposed surfaces. The lack of adequate maturity of the affected concrete to resist these exposure conditions resulted from the use as the cementitious material in it of a blend of portland and natural cements that matures more slowly than a comparable cementitious material consisting solely of portland cement. Author
- Ceramics, Refractories and Glass
- Structural Engineering and Building Technology