Accession Number : ADA326634

Title :   Repair, Evaluation, Maintenance, and Rehabilitation Research Program: Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : McDonald, James E. ; Curtis, Nancy F.

PDF Url : ADA326634

Report Date : APR 1997

Pagination or Media Count : 184

Abstract : Although roller compacted concrete (RCC) was primarily developed for rapid, economical construction of new dams, the case histories reported herein show that it has been used extensively in remediation projects at existing hydraulic structures. These case histories were compiled to illustrate the versatility of RCC in repair, rehabilitation, and replacement of hydraulic structures. RCC applications include increasing existing spillway capacities; construction of new service, emergency, and combination spillways; repair of spillways, outlet tunnel, and lock floor; overtopping and scour protection for rock fill timber crib and embankment dams; seismic strengthening; increasing sliding stability; breach repair; and replacement of rock fill timber crib, earthfill embarkment, and concrete dams. The basic properties of RCC (high strength, low permeability, and high erosion resistance compared to nonstabilized materials) together with low cost, rapid and relatively simple construction methods, and proven performance make it particularly attractive for remediation of hydraulically deficient embankment dams. Depending on the complexity of placement and total quantity of material required, the cost or RCC typically ranges from 25 to 50 percent less than conventionally placed concrete. These savings are primarily the result of reduced costs for forming, placing, and compacting RCC. Also, the reduced construction time typical of RCC contributes significantly to its lower cost. Rapid construction is a major advantage in repair of hydraulic structures where delays and shutdowns can cause significant losses to the user. Also, rapid construction minimizes the impact of bad weather and reduces the potential for adverse environment impact in the vicinity of project sites.

Descriptors :   *CONCRETE, *CONSTRUCTION, *REHABILITATION, METHODOLOGY, PERMEABILITY, LOW COSTS, REDUCTION, REPAIR, CASE STUDIES, HIGH STRENGTH, HYDRAULIC EQUIPMENT, EMBANKMENTS, EROSION RESISTANCE, SPILLWAYS, DAMS.

Subject Categories : Civil Engineering
      Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE