Experimental Mechanics

, Volume 16, Issue 9, pp 356–360 | Cite as

Effect of axial loads on concrete-mortar sandwich composites

Paper describes the experimental behavior of rectangular sandwich composites under compressive and tensile loads. The composites were composed of reinforced-concrete mortar facings with nonpermeated expanded aluminum-honeycomb core and the experimental results were compared with proposed theories
  • M. K. Phang
  • H. Kraus


Experimental investigations were conducted to examine the behavior of concrete sandwich composites under compressive and tensile loads. The sandwich cores were composed of nonpermeated, expanded aluminum honeycomb and the facings consisted of concrete mortar. Appropriate theories that predict the behavior of such composites were presented and compared with experimental data. All specimens had facing thicknesses of 1 in. (25.4 mm), core thicknesses of 1, 2 and 3 in. (25.4, 50.8 and 76.2 mm); core-cell size of 1/8 and 3/8 in. (3.2 and 9.5 mm); while four different core foil gages were considered for each size. The facings were either plain concrete mortar or reinforced with steel wires.

The large-core-cell-size specimen displayed better bond characteristics and produced more consistent experimental data. The ultimate strengths of both compressive and tensile specimens were not affected by the core-cell size, core thickness, or core density. Axial compressive loads were carried by the facing area while tensile loads were by the reinforcements in the facings. The buckling waves were developed due to the wrinkling of the facings. The buckling waves in the two facings were independent of each other and the overall wave pattern was antisymmetrical.


Fluid Dynamics Axial Load Ultimate Strength Compressive Load Tensile Specimen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of Symbols


total area of reinforcing steel


width of facing


concrete-facing modulus


modulus of elasticity of reinforcing steel


compressive strength of concrete cylinder


yield strength of reinforcing steel


ultimate axial compressive load


ultimate tensile load


facing thickness

\(\varepsilon _u\)

ultimate strain of concrete


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Copyright information

© Society for Experimental Mechanics, Inc. 1976

Authors and Affiliations

  • M. K. Phang
    • 1
  • H. Kraus
    • 2
  1. 1.Soros AssociatesNew York
  2. 2.Rensselaer Polytechnic Institute of ConnecticutHartford

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