| Egyptian Journal of Archeological and Restoration Studies

Authors:
Nail, S. ¹ , Rehan, F. ² (*), Alabiad, I. ³ , Tahaa, A. ³ & El Gemaiey, Gh. <sup>4

1</sup> Inorganic Materials Conservation dept., Faculty of Archaeology, Cairo Univ., Giza, Egypt
² Environment & Restoration dept., Faculty of Nanotechnology for Postgraduate Studies, Cairo Univ., El Sheikh Zayed, Egypt.
³ Construction & Building Engineering dept., Tanta Higher Institute for Engineering & Technology (THIET), Tanta, Egypt.
⁴ Islamic Archaeology dept., Faculty of Archaeology, Cairo Univ., Giza, Egypt

Abstract:
Emphasizing the influence of thermal aging on lime mortar, lime mortar enhanced by fly ash, and lime mortar enhanced by a percentage of nano fly ash, a comparative study is held to de-duce the probability of using pozzolanic additives (fly ash) and high-tech (nanotechnology) to lessen the drawbacks of lime mortar for cultural heritage applications. This was achieved by analyzing their mechanical properties and investigating their crystalline structure before and after subjecting them to thermal aging. The optimal lime mortar achieved was the mixture en-hanced by a percentage of nano fly ash, which showed a 15.8% increase in its compressive strength, and a 9.288% decrease in the mortar’s porosity compared to that of the reference mortar, in addition to enhancing the overall packing density of the mortar. These findings suggest that nano fly ash can significantly enhance the durability of lime mortar, offering a promising solution for preserving cultural heritage structures

Keywords:
Lime mortar Fly ash Nano-Fly-ash Cultural heritage Sustainability

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