Introducing Petrography Methods, XRD Analysis and ISRM Standards in Technology of Stone used in Thresholds and Plinths of Achaemenid Palaces of Pasargadae

Abstract eng:
Pasargadae complex consists of some stone monuments built in 559 B.C. located far North W of Shiraz est plain in Iran. There has been lots of erosion in the course of time in capitals, shafts and plinths of columns. There is a widely use of a special type of black stone in structural elements of Pasargadae which have had lots of erosion remain uncovered based on preservation and restoration point of view. Therefore, technological survey of such stone necessitates reducing demolition process by using conservational policies. According to petrography methods, structural analysis, XRD analysis and mechanical force testing according to International Society for Rock Mechanics standards samples have been experimented. As a consequence, illustrations show the mentioned type of stone is sedimentary type (Shale group) with weak superficial structure operates fragile under attack of aerobic parameters, caused by high permeability. Such mentioned stone, qualifies for craving but not suitable under aerobics. Under such circumstances, nothing found around Pasargadae site nor in any stone minds. So, it is said that these samples carried from other parts to the site of which the main source is still unknown.

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