Abstract
Creep strain, a requirement of the concrete design process, is a complex phenomenon that has
proven difficult to model. Although laboratory tests may be undertaken to determine the creep,
these are generally expensive and not a practical option. Hence, empirical code-type prediction
models are used to predict creep strain.
This paper considers the accuracy of both the relatively new international fib Model Code 2010
(MC 2010) and RILEM Model B4, when compared with the actual strains measured on a range
of concretes under laboratory-controlled conditions. Both models investigated under-estimated
the creep strain. In addition, the MC 2010 (2012) model, which yielded an overall coefficient
of variation (ωall) of 50,4 %, was found to be more accurate than the RILEM B4 (with a (ωall)
of 102,3 %).