Accession Number : ADA182888

Title :   Condition Survey of Lock Number 7, Monongahela River.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB

Personal Author(s) : Stowe,Richard L

PDF Url : ADA182888

Report Date : May 1987

Pagination or Media Count : 154

Abstract : A condition survey was performed to determine the quality of concrete, the extent of possible concrete damage, the processes causing distress of the concrete, and selected physical and mechanical properties of the concrete and foundation materials. The field investigation included a visual examination of the lock and drilling operations to recover concrete and foundation core. Results of the field investigation and laboratory tests indicated that the processes causing distress in the concrete are freezing and thawing action and alkali-silica reaction. The concrete is extensively damaged on and near the top of the guide, guard, and lock walls. Overall the lock concrete is in poor condition evidenced by fine to wide cracking, light to severe scaling, and large spalls. Low quality concrete exists to depths of 2-ft vertically and 0.9-ft horizontally in the guide, guard, and lock walls. Concrete beneath the damaged zones is considered to be of good quality.

Descriptors :   *CONCRETE, *LOCKS(WATERWAYS), *DAMS, ALKALI METALS, CHEMICAL REACTIONS, SILICON DIOXIDE, DAMAGE, DRILLING, CORES, FREEZING, HIGH RATE, INTENSITY, LIGHT, SCALING FACTORS, MECHANICAL PROPERTIES, PHYSICAL PROPERTIES, CRACKS, MATERIALS, LABORATORY TESTS, QUALITY, RIVERS, VISUAL INSPECTION

Subject Categories : Civil Engineering
      Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE