Abstract
Creep of concrete is an important design consideration. National design codes therefore provide
empirical based models for the estimation of creep deformation. Such models generally
estimate a creep coefficient () and an elastic modulus (E) of the concrete, both of which are
used to predict the creep strain at any age. This paper assesses the accuracy of the creep
coefficients () predicted by the relatively new international fib Model Code 2010 (MC 2010)
and RILEM Model B4 using a laboratory test programme. The measured creep coefficient ()
values were statistically compared to those predicted by the models considered. The MC 2010
(2012) Model, which yielded an overall coefficient of variation (ωall) of 44.9 %, was found to
be more accurate than the RILEM Model B4 (with a (ωall) of 103.3 %). Both the models
validated were found to yield less accurate creep coefficients than their respective predecessor
models.