Sarooj

 Sarooj is a traditional water-resistant mortar used in Iranian architecture, used in the construction of bridges, and ice pits or earth refrigerators (yakhchal).

It is made of clay and limestone mixed in a six-to-four ratio to make a stiff mix, and kneaded for two days. A portion of furnace slags from baths are combined with cattail (Typha) fibers, egg, and straw, and fixed, then beaten with a wooden stick for even mixing. Egg whites can be used as a water reducer as needed.


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 Metasyntactic variable, which is released under the 
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