Stresses in concrete at early ages: comparison of different creep models

W i ^ D " = ^ < - p ^ t e_p ( t ) = Aa(T)xN,(t,T) (9) Several creep coefficients Nc, found in the literature and inventoried below, are tested. For a given creep coefficient and a given concrete, an ageing linear viscoelastic calculation (applying the superposition principle), as well as an incremental calculation (based upon the equivalent time method) are carried out.