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This paper identifies the problems with current inspection procedures and discusses a proposed standard for levels of inspection that the owner will specify in the contract documents. The paper identifies the problems and cost to contractors and owners for inspection without clear and specified inspection standards and will demonstrate a savings without compromising the quality of the work.
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Corrosion control and other organizational-level maintenance on U.S. Navy ships consume significant maintenance dollars and labor resources, while negatively affecting Sailors’ quality of life. The mission of the Preservation Team Initiative is to relieve Ship’s Force from performing selected preservation by utilizing qualified contractors, implementing best commercial engineering and technology practices, and using the most advanced coating systems approved for Navy use.
Occasionally, the protective coatings on a structure reach a life span of 20 years. Quite often when this happens, one of the companies involved in the project, either the coating supplier or coating applicator, will publish pictures of the bridge or tank in a trade magazine as if the project was a great achievement. If instead, we accept the premise that most of the resins used to manufacture protective coatings easily remain stable for 20 years, we should ask ourselves the question, “why aren’t all of the coating systems lasting 20 years?”
This paper presents actual performance evaluation findings for various protective lining technologies commonly used for concrete corrosion protection in headspace environments in wastewater collection system and treatment plant applications after a variety of years in service.
This paper takes a look at emerging environmental, health and safety issues that may impact painting contactors and facility owners. Specific topics include OSHA’s hexavalent chromium standard, recent rulings related to multi-employer worksite policy and OSHA’s use of threshold limit values (TLVs®).
Attendees will be provided an overview and understanding of the problems associated with concrete deterioration in water and wastewater treatment facilities. Information regarding surface preparation, material selection and application methods will be presented.
This case study shows how the City of Virginia Beach addressed concrete tank foundation deterioration and steps taken to reduce future deterioration, including moisture control, impact of Alkali Silica Reaction, concrete analysis and proper surface preparation, coatings applications and inspection.
On July 28, 1986 a tornado struck an area outside of Sioux City, IA, destroying one of the four power generation plants at Port Neal. The tornado registered an F4 on the Fujita scale, indicating that “devastating damage” had taken place on the ground. Although there were no major injuries to the employees at the plant, severe damage took place on the equipment.
High performance protective coatings are often failing in the severe headspace environments of wastewater environments. These failures are attributed to many factors including glow permeability properties to resist H2S and other corrosive gasses present within these environments. Although the chemical and physical properties of coating systems can be determined in the lab, this is not the case for application variables and the effects of environmental factors.
Purpose of this report: • Explain the history of South Coast Air Quality Management District (SCAQMD) Rule 1113 – Architectural Coatings and the process that SCAQMD goes through to lower Volatile Organic Compounds (VOC) in architectural coatings. • Report on progress toward achieving low-VOC products with respect to the coating categories subject to Rule 1113 limits. • Report on progress on Reactivity and Availability assessment of solvents found in architectural coatings. • Report on future activities with regard to architectural and industrial maintenance coatings within the South Coast Air Basin.
This paper provides a description of the calcium chloride and relative humidity test procedures, the significance of the results, tips on interpreting the results, and the limitations of the test methods. We also present some of the other techniques used to measure moisture in concrete floor slabs, that are not as popular as the calcium chloride and relative humidity tests.
The Atlanta Hyatt boasts 1,260 guest rooms and just over 180,000 square feet of ballroom and exhibit space. Using the construction technology and trends of the time, the exterior surfaces of the hotel were constructed of exposed river rock aggregate consolidated concrete walls. This was a popular building material, but one that often left gaps of uneven areas where the river rocks were not evenly distributed.