The Role of Nondestructive Testing in Assessing the Infrastructure Crisis
At present the role of nondestructive testing in the evaluation of infrastructure deterioration is an extremely limited one. In the Author's experience this is, in part, due to a reluctance...
Principles of Infrared Thermography and Application for Assessment of the Deterioration of the Bridge Deck at the Zoo Interchange
This paper details the principles of infrared thermography from the underlying theoretical considerations to the physical constraints involved with performing the test. Infrared (IR) thermography...
Concrete Surface Treatments?A Selection Guide
Concrete deterioration can take many forms. The most common forms of concrete surface deterioration includes delaminations, spalling and scaling. This deterioration is usually caused by...
Investigation of Concrete at a Middle East Plant
In recent years, reinforced concrete construction in the Middle East has been beset by durability problems. The causes include availability of a limited number of skilled workers, marginal...
Probabilistic Scheduling of Cavitation Repairs
The probabilistic nature of maintenance scheduling is exemplified by operating histories and conditions which vary from unit to unit. Typically, an operator must decide whether to repair...
The Impact of the Morris Sheppard Dam Experience on Buttress Dam Safety Evaluations
The stability problems encountered at the Morris Sheppard Dam have had an impact upon the Federal Energy Regulatory Commission's (FERC) dam safety program. This paper describes...
Industry Faces the Parking Problem
Parking structures are deteriorating; no land is available for new facilities; and employees have no other options for parking. The situation is a serious one, verging on disaster for...
Surface Treatments for Concrete
The US Army Corps of Engineers initiated in 1984 a research program designated Repair, Evaluation, Maintenance, and Rehabilitation (REMR), one of the work units being the evaluation of...
Probabilistic Approaches to Maintenance
All structures and their components are subject to the aging process, to wear and tear in the performance of assigned functions and to deterioration by exposure to the operating environment....
From Guesswork to Guarantee?
Maser describes a project to determine the effectiveness of radar and infrared thermography in detecting deterioration of asphalt overlaid bridge decks. The project, sponsored by the New...
Rx for Dam Repair
Bernard asserts the growing importance of maintenance to extend the service life of dams as more and more of them reach or exceed their design lives. He describes renovations to Easton...
Practical Aspects of Repairing and Rewinding Hydro-Electric Generators
Often the general condition of the winding can be assessed and in some cases, corrective action can be taken to prolong the life of the winding. In other situations, the assessment may...
Effects of Deterioration on Safety and Reliability of Structures
Deterioration of structural and non-structural elements in commercial, industrial and residential constructions is of general concern to investors, design engineers, architects, contractors...
A New Methodology for Modelling Water Pipe Breaks
A new methodology for modelling breaks in large diameter cast-iron water pipes is proposed. The need to consider two separate stages of deterioration (early stages with fewer breaks and...
Decay in Wood Structures
One of the main causes of wood deterioration is decay. Decay causes millions of dollars in damage to timber structures each year. Left unchecked, decay deterioration can become a structural...
Maintaining Our Goals
Setting goals is easier than achieving them and, once achieved, they must not be viewed as final accomplishments to put behind us - they must be sustained. Although goals are essentially...
Rehabilitation of the CNW and ICG Railroads
The railroad industry is an indispensable part of the American economy. However, the railroad infrastructure was allowed to deteriorate to the extent of having 5. 4 billion in deferred...
Thaw Settlement as a Result of Permafrost Deterioration
An overview is given of floor and footing failure as a result of deterioration of permafrost. Consideration of causes for the deterioration and methods of repair are addressed in general...
Cement Grouting: Water Minimising Practices
Water gives cement grout its mobility, but the water needed for mobility exceeds hydration requirements substantially in most applications. If this excess water is allowed to collect and...
Innovative Strategies to Improve Urban Transportation Performance
The field of urban transportation is facing some severe challenges. Roadways continue to deteriorate, the financial condition of public transit systems is abysmal, and general productivity...
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