Accession Number:

ADA231195

Title:

Repair, Evaluation, Maintenance, and Rehabilitation Research Program. Laboratory Evaluation of Concrete Mixtures and Techniques for Underwater Repairs

Descriptive Note:

Final technical rept.

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB

Report Date:

1990-11-01

Pagination or Media Count:

90.0

Abstract:

Concrete mixtures were placed underwater using six placement techniques to a examine the cohesive and flow parameters of selected concrete mixtures under different placement situations, b estimate those parameters necessary for successful underwater placement, c examine the quality of bonding of the repair concrete to the existing concrete, and d examine the effect of underwater placement upon the abrasion resistance of the concrete. A washout test was used to determine the relative amount of cement paste lost when the concrete is exposed to a large volume of water. The two-point workability test was used to evaluate the relative workability properties of the concrete. The slump, tremie flow, and air content were also measured. The test method for abrasion-erosion resistance of concrete underwater method was used to determine the abrasion-erosion resistance of each concrete. A point-load test for tensile strength was used to determine the bond strength of the repair concrete to the existing concrete.

Subject Categories:

  • Construction Equipment, Materials and Supplies
  • Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE