Study and Consolidation of limestone in Sangnavashteh of Khorramabad Atefeh Shekofteh* Omid Oudbashi** Malihe Bakrani***

Consolidation of stone monuments and artefacts is a conservation operation that has considered by conservators and conservation scientists in last years. One of the methods in conservation of lime stone monuments and artefacts is Lime method. One part of this method is consolidation by lime water. The method has used in last years, especially in England, and some suitable results have achieved in some cases.In this paper, first the stone consolidation methods are introduced and classified and then, the lime method and mechanism of limestone consolidation by lime water have reviewed. The aim of this method is assessing the application of Lime method in consolidation of limestone in air exposed stone monuments. The main question is assessing the lime water consolidation in Sangneveshteh stone monument of Khorramabad (6th century A. H.). For this purpose, the stone has investigated by field and laboratory methods consisting of petrography, XRF, XRD and SEM-EDS. The results show occurrence of physical and chemical weathering in stone surface and loss of some parts in kufic inscription. Finally, the conservation process selected based on results and has presented. The main conservation operation is consolidation by lime water. The stone condition is suitable and show control of stone weathering after five years of conservation.