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Polyurea Application for Excessively Cracked Concrete

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This webinar is archived and recorded from a live presentation on Wednesday, January 15, 2014.
Cost: FREE

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Sponsor:

Graco

Founded in 1926, Minneapolis-based Graco is a world leader in fluid handling systems and components. Graco products move, measure, control, dispense and apply a wide range of fluids and viscous materials used in vehicle lubrication, commercial and industrial settings. Graco protective coatings equipment provides advanced technologies that dependably and accurately spray the toughest materials. With its Graco's global distribution network, contractors can count on quick turnaround times for expert service and replacement parts. For additional information about Graco, please visit www.graco.com.


Have you ever had to coat a concrete containment area that was so severely cracked it would take months to properly repair? Add in speed bumps such as lack of a vapor barrier and fully installed equipment and you have one major headache. Solution: A polyurea "loose" liner.

Upon installation of a typical thin film coating system, extensive dynamic cracking was discovered in concrete chemical secondary containment structures. After multiple failed attempts to repair cracks using standard coating products, the decision was made to proceed with equipment installation in hopes of maintaining schedule while the coating details could be evaluated. With this additional hurdle, the challenge was made to develop a coating system that delivered chemical resistance while acting as a “bandage” over the damaged concrete to provide 100% containment.

Polyurea/ Geotextile systems are commonly recognized as on grade liners for disposal sites, reservoirs, and tank farms. After evaluating various options, the polyurea/ geotextile liner was selected on a trial basis due to its system's flexible and chemical resistant properties as well as the relatively swift installation time. The liners ability to be molded around protrusions and minor surface preparation requirements made this system highly desirable.

This webinar will outline the trials and challenges of modifying the membrane liner to accommodate stringent chemical resistance criteria, poor concrete conditions, and hundreds of pre-installed obstacles. From detailed design to installation mock-up, the pros, cons and lessons-learned are discussed.
Presenter:

Kristin Leonard, Engineering Specialist for Coatings and Non-Metallics
Bechtel Materials Engineering and Technology Group

Kristin received her Bachelor’s of Science Degree in Polymer Science and High Performance Materials from The University of Southern Mississippi. After graduation, Kristin began work for Bechtel’s Materials Engineering and Technology Group where she serves as an Engineering Specialist for Coatings and Non-Metallics. She holds SSPC certifications as a Protective Coatings Inspector as well as a Concrete Coatings Inspector

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Tagged categories: Bechtel; Chemical resistance; Concrete; Concrete coatings and treatments; Graco; Polyurea

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