Experimental evaluation of the consolidation treatments of low porosity limestone from the historic monument of the Anahita Temple of Kangavar, Iran

• The purpose of this paper is to provide an efficient and compatible method to consolidate the limestone blocks used in construction of the Anahita Temple of Kangavar in Iran. Four types of consolidants were evaluated for consolidation treatment, including TEOS, Nanolime, TEOS + MTMOS mixture, and TEOS + Nanolime mixture. The efficiency of the consolidants was evaluated through water absorption, open porosity, and ultrasonic pulse velocity tests, and the durability to freeze-thaw cycles was also verified. Furthermore, the microstructure and color variation were respectively evaluated by SEM-EDS and colorimetry. TEOS + MTMOS mixture decreased water absorption and induced the formation of a homogenous layer without crack; however, a color alteration on the treated surface is also observed. The Nanolime did not work for the consolidation of this stone type due to its low penetration and accumulation of nanoparticles on the surface causing increased water absorption. In addition, TEOS + Nanolime mixture did not penetrate the pores of the stone properly and did not increase its freezing resistance. TEOS induced a satisfactory result with no significant color alteration, if compared to TEOS + MTMOS treatment, as well as improved cohesion of the grains, low water absorption, and consequently increasing the freezing resistance.

Ämnesord

HUMANIORA  -- Historia och arkeologi -- Arkeologi (hsv//swe)

HUMANITIES  -- History and Archaeology -- Archaeology (hsv//eng)

HUMANIORA  -- Historia och arkeologi -- Teknikhistoria (hsv//swe)

HUMANITIES  -- History and Archaeology -- History of Technology (hsv//eng)

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Nyckelord

Anahita Temple of Kangavar

Consolidation

Ethyl silicate

Limestone

Methoxysilane

Nanolime

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)