The paper gives a general historical view over theoretical valuations for adhesion between concretes and polymers and relates these with results of laboratory tests.
The basic theories are presented: mechanical and specific adhesion (including molecular-physical and thermodynamical interpretation). Harmonies and differences between theories and experiments (laboratory one-parameter-studies and multi-parameter-tests with commercial concretes and polymers) are presented.
Considerations are made concerning boundary zones in the concrete substrate and in the polymer, which have other properties than the bulk materials. Such zones are not included in the classical theories.

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