Sarooj

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.

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Its origin (in Persian: Saru) is lime, i.e. limestone mixed with arsenic.^[5]

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 yakhchāl 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.^[6]

Soak the soil for at least two weeks with water. The water should be free of impurities and suitable for drinking.^[7]

History

See also

References

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