Antifouling marine concrete

Technical Report · Tue Jul 01 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/5227480· OSTI ID:5227480

Vind, H P; Mathews, C W

Various toxic agents were evaluated as to their capability to prevent or inhibit the attachment of marine fouling organisms to concrete for OTEC plants. Creosote and bis-(tri-n-butyltin) oxide (TBTO) were impregnated into porous aggregate which was used in making concrete. Cuprous oxide, triphenyltin hydroxide (TPTH), and 2-2-bis-(p-methoxyphenyl)-1,1,1-trichloroethane (methoxychlor) were used as dry additives. Two proprietary formulations were applied as coatings on untreated concrete. Test specimens were exposed at Port Hueneme, CA, and Key Biscayne, FL. The efficacy of toxicants was determined by periodically weighing the adhering fouling organisms. Concrete prepared with an aggregate impregnated with a TBTO/creosote mixture has demonstrated the best antifouling performance of those specimens exposed for more than one year. The two proprietary coatings and the concrete containing methoxychlor, TPTH, and cuprous oxide as dry additives have exhibited good antifouling properties, but they have been exposed for a shorter time. The strength of concrete containing the toxicants was acceptable, and the toxicants did not increase the corrosion rate of reinforcing rods. Organotin compounds were essentially unchanged in concrete specimens exposed 6-1/2 years in seawater.

• Research Organization: Naval Civil Engineering Lab., Port Hueneme, CA (USA)
• Sponsoring Organization: DOE
• DOE Contract Number: AI02-77CH00134
• OSTI ID: 5227480
• Report Number(s): DOE/CH/00134-1
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
ANTIFOULANTS
BIOLOGICAL FOULING
BUILDING MATERIALS
COATINGS
CONCRETES
COST
FOULING
HEAT EXCHANGERS
HYDROGEN COMPOUNDS
IMPREGNATION
MATERIALS
OCEAN THERMAL POWER PLANTS
OFFSHORE PLATFORMS
OXYGEN COMPOUNDS
PERFORMANCE
POWER PLANTS
SEAS
SEAWATER
SOLAR POWER PLANTS
SURFACE WATERS
TOXIC MATERIALS
TOXICITY
WATER