2015 Inspection – 2000 Historical – Raven AquataPoxy A6 – Charleston, South Carolina- Water Treatment Plant

Manufacturer: IMG_2786 IMG_2820 prep2-resize

Raven Lining Systems

13105 E. 61st Street

Suite A

Broken Arrow, OK 74012

(918) 615-0020

Location: Hanahan Water Treatment Plant, Charleston, South Carolina

Owner: City of Charleston

Original Contractor: Dun-Right Services

Estimated Project Date: 2000

Age of Project: 15 years

Inspection Date: July 13th 2015

Type of Structure(s): The structure was concrete filter basin #10 at the 52 year old Stoney Filter Plant, which was being upgraded. During the upgrade, the contractor was removing portions of the concrete walls for new troughs. These walls had been previously coated with AquataPoxy© A6 thick in 2000.

Condition of Structure(s):

The coating was in great condition 15 years later. Only two areas showed damage. The first was outside the construction area from the replacement of new troughs. These areas included a quarter-sized area that appeared to have been caused by impact damage. The second was a 3’ X 5’ area approximately 20-30mils thick. This area appeared to have been top coated outside of the recoat window. It appeared used as a cosmetic repair, covering an area that had holiday repairs.

Structure Results:

Testing was performed by gluing seven 20mm dollies to the coating surface with a fast setting, high strength epoxy. After allowing the glue to set for 24 hours, the dollies were then cored using a 20mm coring hole bit. The adhesion test was performed using a Defelsko  Positest AT. All tests were performed in Filter Basin #10.

Pull 1: 619psi (95% substrate, 5% cohesive failure in coating)

Pull 2: 714psi (100% substrate failure)

Pull 3: 488psi (100% substrate failure)

Pull 4: 621psi (40% substrate, 60% adhesive failure between substrate and coating)

Pull 5: 251psi (75% substrate, 25% adhesive failure between substrate and  coating)

Pull 6: 723psi (100% substrate failure)

Pull 7: 511psi (100% substrate failure)





Charleston WTP 2000 Historical