Expedient reinforcement for concrete for use in Southeast Asia. Report 2, Preliminary tests of barbed wire, concertina wire, wire rope, landing mat, and landing mat tie bars
Cox, F. B. (Frank B.); Geymayer, H. G.
Technical reportAbstract: This is the second of a series of reports on expedient reinforcement for use in Southeast Asia. This report concerns materials generally available near theater of operations areas, specifically, barbed and concertina wire, wire rope, landing mat, and landing mat tie bars. The most important engineering properties (yield strength, tensile strength, elastic modulus, and bond) of the materials were determined and 17 concrete beams were cast and tested to determine the suitability of the materials as reinforcement and to develop design procedures. Each of the materials tested can be used as expedient reinforcement, but due to its method of fabrication, wire rope is the least desirable. Wire rope larger than 3/4 in. (1.90 cm) in diameter is not recommended as expedient reinforcement. Paint should be removed from AM2 landing mat tie bars to make them suitable as reinforcement. If it is necessary to join the tie bars to obtain a sufficient length of reinforcement, the bars should be joined by welding rather than by bolting. Barbed and concertina wire should be placed in assemblies of approximately six strands each to reduce fabrication time. At present shear reinforcement is recommended for all types of reinforcement tested, although the shape of the M8 landing mat tested provides effective partial shear reinforcement when the sections are placed in an upright position. Either barbed or concertina wire stirrups were found to provide sufficient expedient shear reinforcement. A modified ultimate strength (Sinha-Ferguson) method is recommended for the design of beams reinforced with barbed wire, concertina wire, wire rope, or landing mat. Either working stress or ultimate strength design according to ACI Code 318-63 is recommended for tie bar reinforcement. Shear reinforcement can be provided according to ACI Code procedures.
Concrete Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Expedient reinforcement; Landing mats; Reinforced concrete; Southeast Asia; Tie bars; Wire; Wire rope
Technical report (U.S. Army Engineer Waterways Experiment Station) ; C-69-3 rept.2.
Approved for public release; distribution is unlimited.