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Selection of Coating Systems for Concrete in the Water & Wastewater Environment

Selection of Coating Systems for Concrete in the Water & Wastewater Environment
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Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry.

Product Number: 41206-231-SG
Author: Roger Decker
Publication Date: 2006
Industries: Water/Wastewater , Coatings , Corrosion Monitoring and Control
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$20.00
$20.00

Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry. Corrosion of the concrete ultimately leads to deterioration of the reinforcement. Coatings are being widely used to protect concrete against water, carbon dioxide, chlorides, sulfides, and other aggressive agents. This technology has been slower to develop, and the coatings involved require more specific properties.  Perhaps even slower to develop, has been the technically oriented and often expensive application equipment required to install high performance, hybrid or exotic coatings. As our infrastructure ages, the need to protect concrete is ever increasing. There is more than 20 years’ experience with some types of coatings in this field – enough to establish their performance. Over the last decade, many new systems have been developed and the need for their continued evaluation remains.

Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry. Corrosion of the concrete ultimately leads to deterioration of the reinforcement. Coatings are being widely used to protect concrete against water, carbon dioxide, chlorides, sulfides, and other aggressive agents. This technology has been slower to develop, and the coatings involved require more specific properties.  Perhaps even slower to develop, has been the technically oriented and often expensive application equipment required to install high performance, hybrid or exotic coatings. As our infrastructure ages, the need to protect concrete is ever increasing. There is more than 20 years’ experience with some types of coatings in this field – enough to establish their performance. Over the last decade, many new systems have been developed and the need for their continued evaluation remains.

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Reinforced concrete is the most common building material in water and wastewater treatment facilities. It is very common to see unprotected concrete in severely corrosive environments or corroding reinforcing steel that has been exposed due to construction defects or coating failures. The decision to coat new and existing concrete structures can be very difficult for owners due to the cost, turn-around times for putting structures back into service, and lack of confidence in certain protective coatings. 
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Product Number: 41206-232-SG
Author: Scott DeVinney
Publication Date: 2006
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Preservation of wastewater treatment assets and the evolution of the coating options required to mitigate the severity of the exposure environment, are  giving coating contractors pause to examine alternative means of application. By expanding application versatility, the coating contractor will be able to compete across the range of preservation options. 
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