Evaluation of the Impact of Nano-Absorptive Waterproofing on the Reduction of Water Absorption in Sand-Cement Mortar Used in the Historical Restoration of Persepolis

Meshkinfam Fard, Habib; Talebian, Mohammad Hassan

doi:10.61882/kcr.7.1.1

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Volume 7, Issue 1 (6-2024) KCR 2024, 7(1): 1-20 | Back to browse issues page

‎ 10.61882/kcr.7.1.1

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Meshkinfam Fard H, Talebian M H. Evaluation of the Impact of Nano-Absorptive Waterproofing on the Reduction of Water Absorption in Sand-Cement Mortar Used in the Historical Restoration of Persepolis. KCR 2024; 7 (1) :1-20
URL: http://journal.richt.ir/kcr/article-1-187-en.html

Evaluation of the Impact of Nano-Absorptive Waterproofing on the Reduction of Water Absorption in Sand-Cement Mortar Used in the Historical Restoration of Persepolis

Habib Meshkinfam Fard

, Mohammad Hassan Talebian ^*

Professor, Department of Architecture, School of Architecture,College of Fine Arts, University of Tehran, Tehran, Iran.

Abstract: (1640 Views)

The structure of Persepolis is subjected to various factors that cause erosion and decay due to moisture. The cement mortars used in past restorations are one of the challenges in preserving this grand stone monument. Over time, these mortars, due to higher water absorption than the stone, have exacerbated the destructive effects of moisture, causing serious but gradual and irreversible damage. Since removing these mortars and replacing the past restorative measures to improve the current situation is extremely difficult and may have damaging consequences for these valuable artifacts, this research aims to evaluate the impact of nano waterproof coatings on reducing the moisture absorption of the used cement mortars through comprehensive studies on the current state of these monuments and the restorations carried out with cement. Therefore, this research aims to provide a suitable solution without needing to remove the cement mortar and with minimal intervention to protect these artifacts. This study employs an experimental research method and considers theoretical concepts within laboratory studies. In this process, two types of Iranian and foreign nano waterproof coatings named Zycosil Max and FarazSil were applied on similar cement mortar samples, and their permeability and water absorption were evaluated using water absorption percentage and capillarity tests. The results showed that both waterproof coatings effectively reduced the cement mortar's water absorption. Zycosil Max, with a performance of 60.5%, and Faraz Sil, with a performance of 48.02%, significantly reduced the water absorption of the cement mortar, with Zycosil Max showing better performance than FarazSil. However, considering that the water absorption percentage did not reach close to that of the stone samples of Persepolis and the more than tenfold difference in water absorption percentage, none of the studied materials are recommended for waterproofing the cement mortar used in the restoration of the Persepolis monument.

Keywords: Persepolis, Stone Conservation, Nanotechnology, Cement Mortar, Waterproofing.

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Type of Study: Research, Original, Regular | Subject: Application of modern sciences, technologies, equipment, materials and methods
Received: 2024/02/6 | Accepted: 2024/05/11 | Published: 2024/06/20

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