An Experimental Study of the Mechanical Behaviour of the 'Conchyliates' Shell-Stone: Some Irregularities of the Size Effects

作者：Kourkoulis S K^*

来源：Strain, 2011, 47: E344-E356.

DOI：10.1111/j.1475-1305.2009.00618.x

• 'conchyliates'
• compression
• marble
• natural building stones
• shell-stone
• size effect

A detailed experimental study of the size effect, i.e. of the dependence of the mechanical properties on the size of the (self-similar) specimens used for the laboratory tests is presented in this paper for the case of a relatively soft natural building stone called 'conchyliates' (shell-stone). 'Conchyliates' was used by ancient Greeks for the erection of the Zeus Temple at the Olympia archaeological site. The motive of the study was the need of the scientists working for a partial restoration of the monument for an in-depth knowledge of the mechanical behaviour of both the original building material of the monument as well as of the material that could be used for the completion of damaged structural elements. During the study various classes of cylindrical 'conchyliates' specimens were subjected to uniaxial (unconfined) compression. It was concluded that the dependence of the peak stress of the material on the size of the specimen is not only very strong but it appears to be, also, non-monotonous. In addition it was indicated that the size of the specimens also influences the elasticity modulus as well as the strain energy density in a more or less similar manner. On the contrary it is concluded that the slope of the strain energy density plotted versus strain is not seriously affected by the size of the specimen, at least for the working-load portion of the stress-strain graph.

• 出版日期2011-6