Lime mortar grout application on an old stonework wall. Three steps are visible here: On the right, the wall before applying the mortar. A few centimeters of old grout was removed beforehand. On the center, lime cement was applied with a trowel. On the left, the cement was grated with a metallic brush to obtain its final aspect.
<a href="//commons.wikimedia.org/wiki/User:Berrucomons" title="User:Berrucomons">Berrucomons</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>