Sarooj

You can help expand this article with text translated from the corresponding article in Persian. (April 2021) Click [show] for important translation instructions. View a machine-translated version of the Persian article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Persian Wikipedia article at [[:fa:ساروج]]; see its history for attribution. You may also add the template {{Translated|fa|ساروج}} to the talk page. For more guidance, see Wikipedia:Translation.

You can help expand this article with text translated from the corresponding article in Arabic. (April 2021) Click [show] for important translation instructions. View a machine-translated version of the Arabic article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Arabic Wikipedia article at [[:ar:صاروج]]; see its history for attribution. You may also add the template {{Translated|ar|صاروج}} to the talk page. For more guidance, see Wikipedia:Translation.

Sarooj is a traditional water-resistant mortar used in Iranian architecture,^[1][2] used in the construction of bridges^[3] and yakhchāl, ancient Persian ice houses.^[4] It is made of clay and limestone mixed in a six-to-four ratio to make a stiff mix, and kneaded for three days.^{[citation needed]} A portion of furnace slags from baths is 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.