CoatingsPro Magazine

MAR 2015

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Opened in 1967 as a symbol of the United States westward expansion, the 630-foot-high (192 m) St. Louis Gateway Arch represented the spirit of discovery and growth. 47 COATINGSPRO MARCH 2015 system to protect the concrete land bridge from tree root infl- tration, water seepage, and premature deterioration. Potential Colossal Failure St. Louis-based Coatings Unlimited, Inc. (CUI) won the appli- cation bid, but company vice president Steven R. Philipp, Jr. and project foreman Larry Faltus quickly identifed a potential colossal failure. As soon as CUI fnished installing the water- proofng system, teams of landscapers were slated to bring in more than 20,000 cubic yards (15,291 m³) of soil, materials for 944 linear feet (288 m) of bench seating, and more than 220 mature trees. To install these things, landscapers would have to drive earthmovers, bobcats, and other machinery directly on top of the waterproofng system. Hey, polyurea is tough, but would it stand up to intentional abuse? Te project brain trust decided not to take the chance. If earthmoving equipment somehow compromised the polyurea, tree roots could infltrate, water could seep into the slab and corrode the rebar, and in a few years, chunks of concrete could begin falling onto cars. "Originally the idea was simply to prep, prime, and put 100 mils [2,540 microns] of fast-set polyurea over everything," said Philipp. "But when the owners became concerned about working on top of the polyurea, we wanted to come up with an option so they could protect the integrity of the waterproof membrane. We're not talking boots on the ground here; we're talking heav y equipment."

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