Conservation of Severely Deteriorated, Dry Painted Wood: A Case Study From Abydos, Egypt

Davis, Suzanne L.; Sadek, Hamada; Chemello, Claudia; Smith, Gregory D.; Hatchfield, Pamela; Blanchette, Robert A.; Abdel-Azeem, Ahmed M.; Richards, Janet E.

doi:10.1080/01971360.2021.1951551

Cited by 2 publications

(2 citation statements)

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“…It is consist of tetraethoxysilane (TEOS) monomer, its oligomers, reaction catalyst, and a small amount of solvent (ethanol) 9 . It is reported that many stone cultural assets are modified using OH‐100 11–15 . The mixture of methyltrimethoxysilane (MTMOS) and its oligomer are also used 16,17 .…”

Section: Introductionmentioning

confidence: 99%

“…9 It is reported that many stone cultural assets are modified using OH-100. [11][12][13][14][15] The mixture of methyltrimethoxysilane (MTMOS) and its oligomer are also used. 16,17 It was studied that the hydrophobicity and strength of OH-100-treated layer on the surface is improved by the addition of silica (SiO 2 ) nanoparticles 16 or polyhedral oligomeric silsesquioxane.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of coagulating strength and toughness of alkoxysilanes for conservation of cultural heritage

Nakamura

Nagao

Kontani

et al. 2022

J of Applied Polymer Sci

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The optimal restoration agent for the brittle walls of Idout's tomb built 4400 years ago in Saqqara, Egypt, which is located underground in a desert area, was investigated. From x‐ray diffraction analysis of the sand collected near the tomb, the main ingredient is silica. Alkoxysilane and its oligomer are used because its alkoxy groups can react readily with silica. The compressive test of solidified model sand its main component is silica was done. The increase of both molecular weight of oligomer and the content of oligomer with higher molecular weight effectively developed the compressive force. When an earthquake occurs, it is desirable that the reinforced wall will be crushed in ductility. The addition of di‐alkoxy type alkoxysilane to oligomers changed the failure mode from brittle to ductile, because the network becomes looser. When a moderate quantity of di‐alkoxy type is added to oligomers, the solidified model sand deforms with greater displacement, while maintaining a high compressive force. From scanning electron microscopic observation of fractured solidified specimen, alkoxysilane was making the sand particles connect as a binder. Many cracks were clearly observed in the binder layer. Whereas, the formed crack was far smaller for di‐alkoxy added system.

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Section: Introductionmentioning

confidence: 99%