  Soft glassy materials are out of thermodynamic equilibrium and show time
dependent slowing down of the relaxation dynamics. Under such situation these
materials follow Boltzmann superposition principle only in the effective time
domain, wherein time dependent relaxation processes are scaled by a constant
relaxation time. In this work we extend effective time framework to
successfully demonstrate time - temperature superposition of creep and stress
relaxation data of a model soft glassy system comprised of clay suspension.
Such superposition is possible when average relaxation time of the material
changes with time and temperature without affecting shape of the spectrum. We
show that variation in relaxation time as a function of temperature facilitates
prediction of long and short time rheological behavior through time -
temperature superposition from the experiments carried out over experimentally
accessible timescales.
