Laboratory Tests of Concrete Cores from the New Second Lock Sault Ste. Marie, Michigan.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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Two groups of concrete cores from the walls and floor of the New Second Lock at Sault Ste. Marie, Michigan, were tested in the laboratory with the intent of answering the following questions a Does the concrete show any sign of physical damage of the type that occurred in the culverts at Eisenhower Lock on the St. Lawrence seaway. b Was the air-void system of the concrete wholly or partially filled during 17 months of submergence in the lock chamber. Two groups of cores were drilled from concrete placed in the summer and fall of 1966 and the spring of 1967. The first group was drilled in 1968 and shipped dry and the second in 1969-1970 under water and shipped packed to maintain field moisture content. Selected specimens from each group were tested for air content, compressive strength, resistance to accelerated laboratory freezing and thawing, and permeability. Some petrographic observations were tested and included. Modified author abstract
- Civil Engineering