The Development of Micro-Concrete for Scale Model Testing of Buried Structures.
Final rept.Sep 83-Dec 84,
FLORIDA UNIV GAINESVILLE DEPT OF CIVIL ENGINEERING
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This report describes the development of microconcrete and miniaturized reinforcement for modelling 160th and 190th scale reinforced concrete buried structures. The microconcrete uses gypsum cement, sand aggregate and water in a ratio of 10.80.25 by weight. Curing is halted by sealing the microconcrete after 48 hours exposure to air at ambient temperatures. The resulting mix has the following properties fsub c 4085 psi, f sub t 327 psi, gamma 130 pcf yd, E sub c 3.3x1000000 psi. Miniaturized reinforcement was developed using 28, 24, and 22-gage wire passed through a deforming machine to provide knurls on the wire. Pretensioning the wire was necessary to remove kinks and coils. Failure load predictions of miniature reinforced beams agreed well with observed results. Keywords blast loading. Author
- Ceramics, Refractories and Glass