Buoyant Concrete for Ocean Construction and Flotation.
Final rept. Jul 70-Jun 71,
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
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The report summarizes an investigation of buoyant concretes containing lightweight, non-absorbent glass nodules as the major aggregate constituent. Specimens 3 x 6 inch cylinders from thirty-five different batches of concrete were tested for workability, strength, density, and absorption. The glass nodules were tested to implosion. Mix design curves and cost estimates were determined. The strength and wet density of this concrete ranged from 130 psi to 1,760 psi and 42 pcf to 77 pcf, respectively the hydrostatic strength of the nodules was approximately 60 psi. Impregnating this concrete with polymer produced strengths of 1,670 psi to 5,040 psi and densities of 60 pcf to 75 pcf. The results indicate that this concrete can be used as a low-cost 0.10 to 0.20 per pound of buoyancy buoyant filler material for ocean applications in which low-strength 150 psi is permissible. Author, modified-PL
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