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Mortar Optimization Project Undertaken, Eyeing Restoration in Persepolis




13 July 2003


Researchers in the Parse-Pasargad foundation have embarked on a program to come up with a new kind of cement mortar composite to be used in restoration of the monuments in Persepolis.

The project aims to optimize cement mortar used by the restoration experts. Most restoration works in Persepolis are conducted using cement mortar and yet no study has so far been undertaken with regard to optimization of the material, said the project manager.

Nahid Harati noted some restoration works using cement mortar may damage the historical monument.

"Cement composites are similar to the type of stones used in the Persepolis monuments. However, regional weather conditions and different rates of expansion and contraction mean that the stone and the mortar do not stick together well," Harati added.

She touched on dislocation of stone slabs and their falling off from the monuments, cracks in the monuments, generation of salt and flaking of stones as major implications of applying cement mortar in the Persepolis restoration works.

The mortar has always been used in the restoration works in Persepolis, most notably from 1939 to 1977, in restoring the floor of the entrance stairs, the eagle capital and stones which had fallen off various parts of the site.

The preliminary stage of the project including studying previous restoration works in Persepolis has been completed.



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