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 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 Model, which yielded an overall coefficient of variation (ωall) of 50.4 %, was found to be
more accurate than the RILEM B4 Model (with a ωall of 102.3 %).