Concrete Impressed Current Cathodic Protection System for Ocean Towers South Condominium

This 11 story, 42 unit condominium was the first of several large upscale oceanfront condominiums in South Florida to have one of Corrpro’s impressed current cathodic protection systems for control corrosion of the reinforcing steel. CP was installed on all of the concrete balconies, walkways, carport roof slabs and the entrance canopy. Jupiter Island is situated at the northeastern corner of Palm Beach County, Florida.

Problem

In the Spring of 2000, the Owners of Ocean Towers South Condominium were faced with a dilemma involving major restoration of their concrete balconies and walkways. Over the last 10 years sporadic repairs were undertaken and a major restoration was inevitable. The oceanfront exposure for this building allows airborne chlorides (salt) to enter into the concrete and migrate to the reinforcing steel, resulting in rapid corrosion. In order to identify the magnitude of the problem, Corrpro’s engineers performed a variety of tests on the structure including chloride ion content, electrical continuity of rebar, resistivity of concrete patch materials and polarization development testing through delaminated concrete.

Solution

The test results indicated that the areas in question (approx. 50,000 ft2) were ideal candidates for one of Corrpro’s impressed current cathodic protection systems. The Board elected, with considerable input from experts in the industry, to install ELGARD’s™ titanium anode mesh encased in a thin-set mortar under new ceramic tiles on the balconies andwalkways. On the roofs of the carports and entrance canopy, the mesh was covered with a thin concrete overlay and then painted to match the adjacent concrete surfaces.

Performance

The entire system is powered and monitored by Corrpro’s rectifier and CORD-COM™ remote monitoring system. The system is operating at optimum voltage and current levels to control further corrosion of the reinforcing steel in the concrete balconies, walkways, roof slabs and entrance canopy. Corrpro will continue to monitor the CP system remotely from its head office in Medina, Ohio.

Value

The benefits to the Owners can be summed-up in a direct quote from the Board President Aris Marziali: “After studying five different CP systems, I came to the conclusion that Corrpro’s was the most cost-effective, reliable and maintenance free solution. The corrosion protection project is now completed and I am extremely pleased by Corrpro’s professionalism and efficient performance. Now I feel I can count on the integrity of our building for years to come.”

Project Data

Structure: Ocean Towers South Condominium

Location: 200 Beach Road, Tequesta (Jupiter Island), FL 33469

Owner:  Ocean Towers South Condominium Association

Owner Contact:  Mr. Aris Marziali, Board President

Tel:  (860) 456-7131

Building Manager:  Mr. Jeff LaFary

Tel:  (561) 746-5850

Engineer:  Howard J. Miller, PE, Inc

Engineer Contact:  Mr. Steve Young, PE

Tel:  (561) 392-2326

Anode Type & Size: ELGARD™ 150 Anode Mesh (50,000 ft2

Contractors:  Southern Construction & Southern Cathodic Protection

Installation Date:  2001

Leading governmental and independent trade organizations have monitored, tested, and reported on corrosion control strategies over the past three decades. These groups include the American Concrete Institute, National Association of Corrosion Engineers, and the Federal Highway Administration. They advocate CP as the only rehabilitation technique that effectively stops corrosion in salt-contaminated structures, regardless of the chloride content in the concrete.

Corrpro Companies, Inc., a subsidiary of Insituform Technologies, Inc. (NASDAQ: INSU), is the leading provider of corrosion engineering services, materials and systems for the infrastructure, environmental and energy markets throughout the world. For reinforced concrete structures, our involvement has been in many areas including CP system design, installation, testing, coatings evaluation, research and development. Corrpro is the worldwide licensee of the ELGARD™ system for CP of reinforced concrete structures.

ELGARD™ is a trademark of Eltech Systems Corporation.

For more detail regarding Corrpro's work with impressed current cathodic protection systems, you may wish to view some of our unique case studies below: