In the paper an application of a new plain concrete model to the analysis of nonproportional loading paths at the material point level is presented. This rate-independent model is based on the bounding surface plasticity theory. Two examples are discussed: the so-called tension-shear model problem and non-proportional loading path analysis in compression . For both examples reliable results (numerical or experimental) exist and suitable comparison is possible. In conclusions it can be stated that the presented concrete model in the postcritical state in tension, when the axes of the principal strains rotate, behaves quite similar to the rotating crack model and that for the rotation of the principal stress axes in compression (but not in the postcritical state). the model renders in a proper way the real concrete behaviour from experiments.

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