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- W2287984334 abstract "United Catalyst, Inc., Louisville, Kentucky was concerned about safety and maintenance problems created by deteriorated concrete floors in an area where nitric acid is used to manufacture commodity and custom catalysts for hydrogen, ammonia, methanol and petrochemical applications. The eroded areas were being repaired with a concrete overlay, but some of the patches showed deterioration within 24 hours. Failure was due to insufficient cure time for the new concrete because the production area could not be shut down for more than one day. A different type of concrete topping was needed that is resistant to attack by concentrated nitric acid, and also cures quickly even in unheated areas to avoid downtime. Other requirements include easy application by plant maintenance crews, high bond strength with acid-saturated concrete that cannot be thoroughly cleaned, and the ability to withstand lift trucks with up to three ton loads. A 100% solids concrete topping material with a substituted methacrylate binder, which rapidly cures to form a dense chemical and abrasion resistant overlay, was used to resurface one of the severely spalled areas early in 1983. The concrete topping, that requires minimal surface preparation, completely eliminated downtime to repair the severely erroded area and shows nomore » signs of failure after a year of continuous exposure to nitric acid and heavy forklift truck traffic. Meanwhile the material has been used to resurface approximately 200 sq ft of damaged concrete floors since it meets the requirements for economical application and long-lasting protection.« less" @default.
- W2287984334 created "2016-06-24" @default.
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- W2287984334 date "1985-01-01" @default.
- W2287984334 modified "2023-09-23" @default.
- W2287984334 title "Chemical resistant topping avoids downtime for repairs to corroded concrete floors" @default.
- W2287984334 hasPublicationYear "1985" @default.
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