CHEMICAL COMPOSITION AND DECAY PATTERNS OF STONES USED IN PASARGADAE WORLD HERITAGE SITE

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SHEKOFTEH ATEFEH; AHMADI HOSSEIN; YAZDI MEHDI

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Journal: Maremat & memari-e Iran Year:2018 | Volume:7 | Issue:14 Page(s): 27-44

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Title

CHEMICAL COMPOSITION AND DECAY PATTERNS OF STONES USED IN PASARGADAE WORLD HERITAGE SITE

Author(s)

SHEKOFTEH ATEFEH | AHMADI HOSSEIN | YAZDI MEHDI | Issue Writer Certificate

Keywords

PASARGADAE WORLD HERITAGE SITEQ1

LIMESTONEQ2

STONE DETERIORATIONQ1

DISSOLUTIONQ1

BIO-DETERIORATIONQ1

Abstract

Stones used in PASARGADAE WORLD HERITAGE SITE are different in texture and color as wellas chemical characters. Despite equal environment condition, they have been damaged indifferent forms. The aim of this study is to identify stones compositions and decays throughXRD and XRF analysis. Also, some surface investigations have been done by DigitalMacroscopic and Scanning Electron Microscope (SEM).The analyses declare that thesestones are all from three different kind of LIMESTONE. Two types of the LIMESTONE that are inbeige and dark gray colors have a compact texture, but the third one that is in yellow graycolor has fairly porous structure. The main phase reported in X-ray diffraction analysis isCalcite (CaCO3), in addition, minor amount of quartz phase (SiO2) have also been reported.In some beige stone analysis, dolomite phase was observed and the quality of dolomite(Ca,Mg(CO3)2) and calcite were approximately equal in ratio. According to microscopic andmicrostructure images, the main reason for the decay of dark and green gray types is theirintrinsic problems. The main factor of decay in beige stone is lichens mechanism. Hence,the results of experiments and observations determine that the main environmental decayfactors in PASARGADAE WORLD HERITAGE SITE are microorganism and water duo to calcitedissolution and clay swelling.

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APA: Copy

SHEKOFTEH, ATEFEH, AHMADI, HOSSEIN, & YAZDI, MEHDI. (2018). CHEMICAL COMPOSITION AND DECAY PATTERNS OF STONES USED IN PASARGADAE WORLD HERITAGE SITE. MAREMAT-E ASAR & BAFT-HAYE TARIKHI-FARHANGI, 7(14 ), 27-44. SID. https://sid.ir/paper/205161/en

Vancouver: Copy

SHEKOFTEH ATEFEH, AHMADI HOSSEIN, YAZDI MEHDI. CHEMICAL COMPOSITION AND DECAY PATTERNS OF STONES USED IN PASARGADAE WORLD HERITAGE SITE. MAREMAT-E ASAR & BAFT-HAYE TARIKHI-FARHANGI[Internet]. 2018;7(14 ):27-44. Available from: https://sid.ir/paper/205161/en

IEEE: Copy

ATEFEH SHEKOFTEH, HOSSEIN AHMADI, and MEHDI YAZDI, “CHEMICAL COMPOSITION AND DECAY PATTERNS OF STONES USED IN PASARGADAE WORLD HERITAGE SITE,” MAREMAT-E ASAR & BAFT-HAYE TARIKHI-FARHANGI, vol. 7, no. 14 , pp. 27–44, 2018, [Online]. Available: https://sid.ir/paper/205161/en

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