Evaluation of some pastes used for gap filling of archaeological bones

Abdel-Maksoud, Gomaa; Sobh, Rokaya Aly; Tarek, Ahmed; Samaha, S. H.

doi:10.1016/j.measurement.2018.06.061

Cited by 8 publications

(9 citation statements)

References 38 publications

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“…Also, comparing pastes no. 1, 2 with others obtained in our previous work without MMT [31] , we find that the presence of MMT nanocomposite caused increasing the lightness and increase the color resistance against thermal ageing.…”

Section: Yellow -Blue Color (B*)supporting

confidence: 83%

“…n the opposite, it was observed that for paraloid 72 pastes with CaCO 3 exhibit lower lightness than that with microballons. And that with clay recorded slightly higher lightness than others with no clay as measured in the previous search but still decrease with lower percentage [31]. Tables 2 & 3 that the values obtained were in green color for all pastes (the results were minus).…”

Section: Change Of Colorsupporting

confidence: 50%

“…When comparing pastes no.1 and 2 with reduction in contact angle as 18.3% and 9.2% with their corresponding samples in the previous paper [31] 29% for paste 1 without mMMT and 12.2% for paste 2 without mMMT. And comparing pastes 5 and 6 with reduction in contact angle as 12% and 7.5% with their corresponding pastes without mMMT paste 3 (22%) and paste 4 (11%), respectively.…”

Section: Contact Angle (Wettability)mentioning

confidence: 59%

“…1, 53.3% for the paste No. 2 (the corresponding pastes without clay recorded an increase as106% and 62.8% , respectively), [31] 65% for paste no. 3, 56.3% for paste no.…”

Section: Density Porosity and Water Absorption Densitymentioning

confidence: 94%

“…After the imaging process, the contour was applied to fit the water droplet. The tangent at the point of contact between the water droplet contour and surface of the sample was drawn and the inner angle of the tangent and the sample surface was measured manually using protractor [31].…”

Section: Contact Angle Measurement (Wettability)mentioning

confidence: 99%

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Evaluation of Montmorillonite (MMT)/polymer nanocomposite in gap filling of archaeological bones

et al. 2019

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A RCHAEOLOGICAL bones are exposed to various deterioration factors, so polymers are used to improve their properties and give more durability. Traditional pastes were applied and evaluated before. This study aims to evaluate some modified pastes in order to improve the properties of traditional pastes. Montmorillonite MMT was modified with amino acid and characlterized in terms of Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction XRD and scanning electron microscope SEM. Nanocomposites of modified MMT with paraloid as acrylic polymer were evaluated using XRD to be used for gap filling and completion of archeological bones to give more resistance against surrounding environmental conditions. Accelerated ageing were used for evaluation of modified pastes and estimated through change of color by UV spectrophotometer, FTIR, mechanical properties (tensile, elongation and compressive strength) and surface morphology by SEM. The results confirmed that the modified pastes with modified mMMT nanocomposite showed good resistance against thermal ageing, and give high stability in terms of color change value, surface morphology and mechanical properties. As pastes with the mMMT gave negligible color difference as 0.98. In addition, the contact angles measurements reduced with smaller ratios as 12% and 7.5% than their corresponding pastes with no mMMT 22% and 11%, respectively. Moreover, pastes with mMMT showed higher density, lower porosity and lower water absorption and exhibit more resistance against thermal ageing.

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Section: Yellow -Blue Color (B*)supporting

confidence: 83%

Section: Change Of Colorsupporting

confidence: 50%

Section: Contact Angle (Wettability)mentioning

confidence: 59%

“…1, 53.3% for the paste No. 2 (the corresponding pastes without clay recorded an increase as106% and 62.8% , respectively), [31] 65% for paste no. 3, 56.3% for paste no.…”

Section: Density Porosity and Water Absorption Densitymentioning

confidence: 94%

Section: Contact Angle Measurement (Wettability)mentioning

confidence: 99%

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Evaluation of Montmorillonite (MMT)/polymer nanocomposite in gap filling of archaeological bones

et al. 2019

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Preliminary Study of Stone Sawing Sludges-based Alkali Activated Materials (AAMs) for the Conservation of Archaeological Ceramics

Portale,

Felter,

Zisi

et al. 2024

Geoheritage

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This paper presents research into the feasibility of using stone sawing sludge-based Alkali Activated Materials (AAMs) for conservation of Cultural Heritage. Sawing sludges are a stone processing waste product resulting from the mixing of rock powder with the water used to cool down the cutting blades. The chemical composition of the sawing sludges, when aluminosilicatic, is suitable for acting as a precursor to produce AAMs. AAMs are known for their low environmental impact and versatility since their existence is drawn from recycling waste materials. One of their possible applications is in the conservation of Cultural Heritage objects. This work presents a preliminary investigation into three sawing sludge-based AAMs with different mineralogical compositions and contributes to formulating guidelines for applying them as fillers on modern and archaeological ceramic pottery based on the evaluation of their workability, appearance and physical properties over time from the moment of application and up to 30 days. Dynamic Vapor Sorption and X-Ray Diffraction results provided an overview of the structural and mineralogical changes under high RH conditions, where the tested AAMs showed a type II isotherm curve, as expected for concrete-like materials, as well as disappearance of thermonatrite after one isothermal cycle. Ultrasonic Pulse Velocity test demonstrated the general homogeneity of the AAMs despite the lower velocity exhibited by one of the formulations, probably due to its internal pore distribution and possible presence of microstratification. The Oddy tests, application tests and colourimetric measurements evidenced the advantages and weaknesses of the AAMs, with overall encouraging results ensuing investment in further in-depth studies of these innovative conservation materials in view of their future use in the field of conservation of Cultural Heritage as a result of a circular economy model.

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Evaluation of MMI/acrylate nanocomposite with hydroxyapatite as a novel paste for gap filling of archaeological bones

Abdel-Maksoud

Sobh²,

Tarek³

2022

Journal of Cultural Heritage

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Evaluation of some pastes used for gap filling of archaeological bones

Cited by 8 publications

References 38 publications

Evaluation of Montmorillonite (MMT)/polymer nanocomposite in gap filling of archaeological bones

Evaluation of Montmorillonite (MMT)/polymer nanocomposite in gap filling of archaeological bones

Preliminary Study of Stone Sawing Sludges-based Alkali Activated Materials (AAMs) for the Conservation of Archaeological Ceramics

Evaluation of MMI/acrylate nanocomposite with hydroxyapatite as a novel paste for gap filling of archaeological bones

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