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20. Continued 
transported to the seafloor via a pipeline suspended from the platform. The proposed 
development integrates existing technologies of the concrete, oilwell, and marine industries 
and extends them to new applications in a new environment, and would require a modest 
development effort as well as simulated tests to verify engineering assumptions based on 
extrapolation of existing knowledge to the new conditions. The proposed method would 
greatly extend the Navy’s capability to place concrete in the deep ocean for the above 
applications which would require concrete to be placed underwater in quantities of 
hundreds and thousands of cubic yards in water depths of many thousands of feet. 
Library Card 
Civil Engineering Laboratory 
PROPOSED METHOD FOR PLACING FRESHLY MIXED 
CONCRETE IN THE DEEP OCEAN (Final), by R. D. Rail 
and H. H. Haynes 
TN-1544 45 pp illus January 1979 Unclassified 
1. Underwater concreting 2. Seafloor construction I. 3.1610-1 
Potential applications for placing concrete in the deep ocean are basically in three areas: 
in situ construction of seafloor structures, foundations and massive anchors for fixed ocean 
facilities, in situ hardening of objects on the seafloor, and containment of hazardous substances 
for environmental protection. This report presents a method for in situ placement of fresh 
concrete on the seafloor in which concrete is mixed on a surface platform and transported to the 
seafloor via a pipeline suspended from the platform. The proposed development integrates 
existing technologies of the concrete, oilwell, and marine industries and extends them to new 
applications in a new environment, and would require a modest development effort as well as 
simulated tests to verify engineering assumptions based on extrapolation of existing knowledge 
to the new conditions. The proposed method would greatly extend the Navy’s capability to 
place concrete in the deep ocean for the above applications which would require concrete to be 
placed underwater in quantities of hundreds and thousands of cubic yards in water depths of 
many thousands of feet. 
Unclassified 
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