Experimental Evaluation of Consolidation Techniques of Fossiliferous Limestone in Masonry Walls of Heritage Buildings at Historic Jeddah, Kingdom of Saudi Arabia

Abdel-Aty, Yaser Yehya Amin; Mahmoud, Hasan Sedeek; Al-Zahrani, A.E.S.

doi:10.21608/arcs.2020.111205

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Based on the studies that are carried out to monitor the current situation of the Ouda Pasha Agency, based on the proposal to reuse the agency as a commercial craft center and a hotel of a special nature, and based on conducting an intensive experimental study for the building materialin a subsequent specialized study-to define their chemical composition [18], evaluate their physical and mechanical properties [19], and assess their state [20], the study proposes the following considerations to restore the agency and ensure its sustainability for future generations.…”

Section: The Proposed Restoration and Conservation Planmentioning

confidence: 99%

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A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

Ali

Elsoqayem

Rizq

et al. 2022

Advanced Research in Conservation Science

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 Ouda Pasha Agency has many archaeological and architectural values that necessitate the need to preserve it.  Studies of the current status of Ouda Pasha Agency show the necessity of carrying out structural and architectural restoration works.  Reusing the Ouda Pasha Agency as a commercial craft center and a hotel with a special character will suit the capabilities of the building and will fit the needs of the urban.

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Section: The Proposed Restoration and Conservation Planmentioning

confidence: 99%

“…Ouda Pasha Agency (Monument no. 19) is located in the Jamaliyeh district. It was built in the Ottoman era in 1084 AH / 1673 AD [3].…”

Section: Introductionmentioning

confidence: 99%

A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

Ali

Elsoqayem

Rizq

et al. 2022

Advanced Research in Conservation Science

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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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¹H pulsed NMR measurement of reactivity of silane coupling agents for conservation of cultural heritage sites

Nakamura,

Takenaka,

Sakai

et al. 2024

J of Applied Polymer Sci

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The network structure and reactivity of suitable restoration agent consisting of silane coupling agents (SCAs) of the brittle walls of a cultural heritage site located underground in a desert area in Egypt were investigated using 1H pulsed nuclear magnetic resonance (pulse NMR). It should possess both high coagulation strength and ductility to ensure that it can withstand an earthquake; it should also contain ethoxy rather than methoxy groups, which generate toxic methanol. The solidification rate for the SCA or oligomer with ethoxy groups was lower than those with methoxy groups; however, the final polycondensates showed the same relaxation time (hardness). The difference spectrum was developed newly to analyze the network structure combined higher strength and ductility. The distribution of crosslinking degree of such polycondensates was narrow, and the amount of lower crosslinking degree was small. On the other hand, the distribution was wide in the polycondensates with ductility but lower strength. From the compression tests of model sand solidified with the restoration agent for both methoxy and ethoxy types showed the superior properties combined higher strength and ductility. The pulse NMR experiment was useful for estimating the solidification rate and the network structure.

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Experimental Evaluation of Consolidation Techniques of Fossiliferous Limestone in Masonry Walls of Heritage Buildings at Historic Jeddah, Kingdom of Saudi Arabia

Cited by 4 publications

References 8 publications

A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

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

¹H pulsed NMR measurement of reactivity of silane coupling agents for conservation of cultural heritage sites

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Experimental Evaluation of Consolidation Techniques of Fossiliferous Limestone in Masonry Walls of Heritage Buildings at Historic Jeddah, Kingdom of Saudi Arabia

Cited by 4 publications

References 8 publications

A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

A Proposal to Rehabilitate Ouda Pasha Archaeological Agency in Historic Cairo Based on the Building’s Data and the Needs of its Surrounding Urban

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

1H pulsed NMR measurement of reactivity of silane coupling agents for conservation of cultural heritage sites

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Product

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¹H pulsed NMR measurement of reactivity of silane coupling agents for conservation of cultural heritage sites