Heterogeneous granular materials exhibit a size effect under tensile loading. thus strength determined in experiment is not a material property. Only few experiments in literature are available on the size effect under compression and the maximum size range of these…
Heterogeneous granular materials exhibit a size effect under tensile loading. thus strength determined in experiment is not a material property. Only few experiments in literature are available on the size effect under compression and the maximum size range of these experiments was 1:4. In this paper a size effect series on sandstone specimens and a size effect series on concrete specimens is presented. These series are the largest with size ranges of 1:32 and 1:16 published so far. Obviously large size ranges are advantageous for experimental studies on the size effect. Experimental studies on that topic are very important, because heterogeneous materials are mostly analyzed and designed with a compressive strength determined on small specimens, that is assumed constant for all sizes. In the experiments a considerable size effect was detected.