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We monitor the relaxation of internal stresses in a fractal colloidal gel oncessation of flow and find a weak power law decay, $\sigma_i \sim t^{-\alpha}$over 5 decades of time where $\alpha \approx 0.07$. The system exhibitsphysical aging of the elastic modulus, $G' \sim t^{\beta}$, with $\beta \approx\alpha$. Imposition of zero stress after waiting time $t_w$ results in strainrecovery as the system relaxes without constraint. Remarkably, recoveries atdifferent $t_w$ can be shifted to construct a master curve where data arescaled vertically by $1/\sigma_i(t_w)$ and plotted horizontally as$(t-t_w)/t_w^{\mu}$ where $\mu\approx 1.25$, indicative of a super-agingresponse.

Dynamics of Internal Stresses and Scaling of Strain Recovery in an Aging Colloidal Gel