Sarooj

show This article may be expanded 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. Consider adding a topic to this template: there are already 238 articles in the main category, and specifying|topic= will aid in categorization. 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 Content in this edit is translated from the existing Persian Wikipedia article at [[:fa:ساروج]]; see its history for attribution. You should also add the template {{Translated|fa|ساروج}} to the talk page. For more guidance, see Wikipedia:Translation.

show This article may be expanded 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. Consider adding a topic to this template: there are already 349 articles in the main category, and specifying|topic= will aid in categorization. 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 Content in this edit is translated from the existing Arabic Wikipedia article at [[:ar:صاروج]]; see its history for attribution. You should 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 ice pits or earth refrigerators (yakhchal).^[4] It is made of clay and limestone mixed in a six-to-four ratio to make a stiff mix, and kneaded for two days^{[citation needed]}. 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.

Mosaddad et al report the use of a mixture consisting of lime, sand and ash in the construction of an 1800 year-old Sasanian bridge-dam on the Karoon river south of Shooshtar.^[3]

The Sheikh's biogas bath-house in Isphahan featured a water-impermeable sarooj composed of lime, egg white, and bamboo dust.^[2]

Another alternative formulation used for yakchal and water tanks in Iran uses "sand, clay, egg whites, lime, goat hair, and ash in specific proportions."^[4]

All of these examples utilize pozzolanic properties and/or incorporate biopolymerization to increase the durability and impermeability of the plaster.^[5]

See also[]

• Qadad, another preindustrial waterproof plaster
• Tadelakt, another waterproof lime-soap plaster

References[]