Unclassified 
SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 
REPORT DOCUMENTATION PAGE 
1. REPORT NUMBER 2. GOVT ACCESSION NO,| 3. RECIPIENT'S CATALOG NUMBER 
DINOOS DN044053 
4. TITLE (and Subtitle) 5S. TYPE OF REPORT & PERIOD COVERED 
COMPRESSIVE STRENGTH OF FRESHLY MIXED 
CONCRETE PLACED, CURED, AND TESTED IN 
THE DEEP OCEAN 
7. AUTHOR(s) 8. CONTRACT OR GRANT NUMBER(s) 
READ INSTRUCTIONS 
BEFORE COMPLETING FORM 
Not final; Oct 1979 — Sep 1980 
6 PERFORMING ORG. REPORT NUMBER 
Harvey H. Haynes and Larry D. Underbakke 
9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT. PROJECT, TASK 
CIVIL ENGINEERING LABORATORY AREAS WORK IUNUTNUMBERS 
Naval Construction Battalion Center $0397; S0397-SL; 
Port Hueneme, California 93043 63713N; 3.1610-1 
11, CONTROLLING OFFICE NAME ANDO AODORESS 12. REPORT DATE 
Naval Facilities Engineering Command February 1981 
13. NUMBER OF PAGES 
Alexandria, Virginia 22332 20 
MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 15. SECURITY CLASS. (of this report) 
Unclassified 
1Sa. DECLASSIFICATION’ DOWNGRADING 
SCHEDULE 
16. DISTRIBUTION STATEMENT (of this Report) 
This publication is required for official use or for administrative or operational purposes only. 
Distribution is limited to U.S. Government Agencies. Other requests must be referred to the 
Civil Engineering Laboratory, Naval Construction Battalion Center, Port Hueneme, 
California 93043 
17. 
18 
19 
DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) 
SUPPLEMENTARY NOTES 
KEY WORDS (Continue on reverse side if necessary and identify by block number) 
Concrete, compressive strength, undersea, pore pressure, triaxial loading, hydrostatic loading, 
saturation, deep ocean structures. 
20. ABSTRACT (Continue on reverse side if necessary and identify by block number) 
Freshly mixed concrete, of low- and high-strength mix designs, was placed in the 
Pacific Ocean in 6 x 12-inch (152 x 305-mm) cylindrical molds to attain initial and final set 
and cure at a depth of 1,830 feet (560 m). At age 11 months, the concrete specimens were 
retrieved and subsequently tested under uniaxial compression in a pressure vessel that 
simulated the ocean depth. The compressive strengths of the deep-ocean concrete specimens 
(continued) 
DD ‘ans 1473 
weunnenii iN 
EDITION OF 1! NOV 65 1S OBSOLETE “Cc 
Unclassified 
SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 
