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This paper documents the removal of floor coatings from concrete surfaces utilizing UHP water jet tools. Traditional methods, including shot blasting and grinding, meet the required production rates, but may fail to remove all of the invisible contaminants. They can also introduce dust into the environment.
This paper documents the removal of floor coatings from concrete surfaces utilizing UHP water jet tools. Traditional methods, including shot blasting and grinding, meet the required production rates, but may fail to remove all of the invisible contaminants. They can also introduce dust into the environment. Earlier versions of water jetting equipment succeeded in addressing two main limitations of grit blasting, containment of media and contaminant removal, but failed to meet required removal rates. New systems are now available that combine the advantages of UHP water jetting into a system that can meet required removal rates with a single machine.
Successful repair material and coating applications are dependent on proper concrete surface preparation. Different surface preparation technologies and quality control methods are reviewed to increase the successful application of materials applied to existing concrete surfaces.
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The goal of this presentation is to help contractors and applicators first identify the problem, understand its cause, and make an informed decision on whether to complete the surface application or to seek a professional opinion in regard to the preferred repair method.
Coating and Lining of Concrete requires an understanding of both new and existing concrete substrate conditions. New concrete must be evaluated for surface strength, cracking, and construction defects. In addition, existing concrete must be evaluated for mechanical damage, chemical contamination, and corrosion. Evaluation methods and equipment will be discussed.