Conducting a Waterline Corrosion Evaluation
A study has been conducted to determine the level of corrosion activity occuring on the U.S. Navy's potable waterlines on Guam. The study evaluated soil parameters including...

Parking Garage Crisis
Corrosion in reinforced concrete parking garages is reaching crisis proportions. The rehabilitation market for these structures is estimated to be as much as $750 million a year, or 30%...

Box Segmentals: Refining Design
Officials at the Florida Department of Transportation (FDOT), which has built more precast concrete segmental box girder bridges than any other state, say their troubles with that design...

Unbonded Performance
Unbonded single strand tendons have been used in the U.S. for about 30 years. In a small number of buildings, strand corrosion failures have occurred. Although it is clear that post-tensioning...

Sulfide in Wastewater Collection and Treatment Systems
ASCE Manual 69, Manual of Practice on Sulfide in Wastewater Collection and Treatment Systems, is intended to help planners, designers, and operators of wastewater facilities understand...

An Analysis of Cavitation Damage in a Francis Turbine Operating Under Small Opening Condition
In this paper some new formulae are derived to estimate the pressure and the relative velocities in the crown and the band regions of the Francis turbine runner operating under any gate...

Field Observations of Cavitation Erosion in Hydraulic Turbines
Field surveys of the operational and design characteristics of 602 hydroturbines installed since 1950 and having a capacity in excess of 20 MW or a discharge diameter greater than 3 meters...

Synchronous Bypass Valves for Hydroplants
The requirement that synchronous bypass valves be provided on most hydroplants and the high cost of suitable valves have created a demand for rebuilt valves. Recently, the Bureau of Reclamation...

Fretting Corrosion on Large Split Thrust Bearing Runners
In the early fifties interfacial slip was measured on laboratory models. Design improvements, resulting from these tests, were incorporated into later machines. These improvements appreciably...

New Parallel Wire Bundle for Cable-Stayed Bridges
A parallel wire bundle is described which is twisted with a long lay length. It is corrosion protected by an inner fill and outer coating of polyurethane. It presents a specially shaped,...

Reliability of Cracked, Prestressed Girders
For prestressed concrete structures in non-aggressive environments or where corrosion-protected prestressing strands are used, it may be possible to allow flexural cracking into the precompressed...

Lead: Taking it from the Tap
Medical evidence is lowering the definition of a safe concentration of lead. In turn, there has been an effort to reduce lead in drinking water. Solutions are complicated, as many lead...

Building the Seven Seas
The Brookfield Zoo's Seven Seas Complex, outside of Chicago, is a combination of the Caribbean and the Pacific Northwest. Completed in May 1987, the Seven Seas Complex consists...

Corrosion Monitoring of Critical Service Pipelines
Corrosion, including microbiologically influenced corrosion (MIC), is receiving much attention as a significant piping material performance concern particularly for critical service pipelines...

Boston's Water Distribution Corrosion Control Program
The Boston Water and Sewer Commission (Commission) was formed in 1977 with a mandate to maintain sound, economical, and efficient systems for water distribution and wastewater collection...

Cables in Trouble
Having inspected more than half of the world's cable stayed bridges, the authors conclude that many are in danger of sudden collapse unless corrosion problems can be stopped....

Epoxy Update
Epoxy-coated reinforcing steel protects against corrosion if it is used correctly. Several construction practices, such as prescribing the limits on permissible coating damage due to shipping...

Brighter Future for Stay Cables
Corrosion problems on cable stayed bridges can be prevented, according to several engineers who responsed to Cables in Trouble, a Civil Engineering article that appeared in the April 1988...

Weathering Steel: Industry's Stepchild
Improper location and poor detailing are two reasons why some weathering steel bridges are not living up to their early promise. That was the consensus reached during a July 1988 forum...

Stopping the Cracks
It is generally agreed that reinforced concrete in parking garages especially in the deicing salt environment is exposed to unusually hostile service conditions. Deterioration of reinforced...

 

 

 

 

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