From considerations of the gel compliance factor and of a creep parameter P, involving the volume concentrations of gel and of cement paste, and using a hyperbolic creep-time expression, an expression for creep of the type of Eq. (13) has been derived. This indicates that creep is proportional to the stress-strength ratio, and that it also increases with an increase in the volume of gel and, in the case of drying creep, with concurrent shrinkage. Test results on concretes made with Type I cement are presented and analyzed with respect to the proposed expression. It is shown that creep recovery is higher under wet storage conditions than at a relative humidity of 50%. The time necessary for the recovery to be complete is at least 100 days.