Accession Number:

ADA026192

Title:

Seawater Absorption and Compressive Strength of Concrete at Ocean Depths.

Descriptive Note:

Final technical note Apr 75-Sep 76,

Corporate Author:

CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF

Personal Author(s):

• Haynes,Harvey H.
• Highberg,Roy S.
• Nordby,Bjorn A.

Report Date:

1976-04-01

Pagination or Media Count:

29.0

Abstract:

The results of two limited investigations on seawater absorption and compressive strength of 6 x 12-inch concrete control cylinders subjected to ocean environmental conditions are given. Seawater absorption of field-dry concrete was found to be 2.36 by weight after exposure to a pressure head to 550 feet for 84 days. Uniaxial compressive strength of concrete saturated and tested under a pressure head of 20,000 feet decreased by 10 when compared to the compressive strength of fog-cured concrete. Concrete under 1-foot and 500-foot pressure heads had a strength similar to that of fog-cured concrete. Seawater abosrption is an important design consideration for massive, floating concrete structures because near-neutrally buoyant conditions are required for the structures at various stages of construction, installation, or operation.

Descriptors:

• *CONCRETE
• *DEEP OCEANS
• *FLOATING BODIES
• PRESSURE
• ABSORPTION
• SEA WATER
• COMPRESSIVE PROPERTIES

Subject Categories:

• Construction Equipment, Materials and Supplies
• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE