Minero-petrographical, physical, and mechanical properties of moderately welded ignimbrite as a traditional building stone from Uşak Region (SW Turkey)

Koralay, Tamer; Çelik, Sefer Beran

doi:10.1007/s12517-019-4923-x

Cited by 13 publications

(6 citation statements)

References 53 publications

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“…Arequipa ignimbrite is representative of the Andean zone and shares the miningpetrographic and physical-mechanical properties obtained in some ignimbrites and other pyroclastic rocks [38].…”

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

“…The more compact pink ignimbrite has higher values in terms of density, compressive strength and dynamic modulus of elasticity than white and beige ignimbrites. The intrusions of Another interesting factor from the point of view of the habitability of buildings is that the use of these ignimbrites contributes to thermal insulation since the Wt ignimbrite has a value of thermal conductivity of 0.27 ± 0.045 W/mK [37], even lower than that of the Uşak ignimbrite [38].…”

Section: Discussionmentioning

confidence: 99%

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Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Bustamante

Vázquez

Prendes³

2021

Applied Sciences

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The petrographic and petrophysical characteristics of three varieties of ignimbrites used in the architectural heritage of Arequipa (southwest Peru) are analyzed. The modal classification QAFP and TAS diagram discriminate their dacitic nature. Mercury injection porometry revealed very high porosity: 46.5% for white and beige ignimbrites, and 35.5% for the pink variety. Ignimbrites contain intrusions of vulcanodetrital fragments and vacuoles that influence their predominantly non-linear mechanical behavior. The results of water absorption by capillarity (C) and ultrasound pulse velocity (UPV) demonstrate a slight anisotropy for the beige variety and near isotropy for white and pink ignimbrites, which justify the randomness of the application of the ashlars in the masonry and in the selection of the faces to carve. Surfaces with hollows in the white and beige ignimbrites are the result of the erosion of the acicular pumice that fills the vacuoles.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Bustamante

Vázquez

Prendes³

2021

Applied Sciences

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“…Another interesting factor from the point of view of the habitability of buildings is that the use of these ignimbrites contributes to thermal insulation since the Wt ignimbrite has a value of thermal conductivity of 0.27±0.045 W/mK [34], even lower than that of the Uşak ignimbrite [35]. The variety of color is inherent in their formation and composition, which has been documented in other geographical contexts [29,36].…”

Section: Discussionmentioning

confidence: 98%

Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Bustamante¹,

Vázquez²,

Prendes³

2021

Preprint

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The petrographic and petrophysical characteristics of three varieties of ignimbrites used in the architectural heritage of Arequipa (southwest Peru) are analyzed. The modal classification QAFP and TAS diagram discriminate their dacitic nature. Mercury injection porometry revealed very high porosity: 46.5% for white and beige ignimbrites and 35.5% for the pink variety. Ignimbrites contain intrusions of vulcanodetrital fragments and vacuoles that influence their predominantly non-linear mechanical behavior. Results of water absorption by capillarity (C) and ultrasound pulse velocity (UPV) demonstrated a slight anisotropy for the beige variety and near isotropy for white and pink ignimbrites, which justify the randomness of the application of the ashlars in the masonry and in the selection of the faces to carve. Surfaces with hollows in the white and beige ignimbrites are the result of the erosion of the acicular pumice that fills the vacuoles.

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“…There are studies of highly porous rocks with high values of water absorption showing low mass loss (below 1.4%) in freeze-thaw tests, as in the study of pyroclastic rocks by Koralay and Çelik [13]. However, these authors also report that some specimens suffered cracking and disintegration during the freeze-thaw tests.…”

Section: Freeze-thawmentioning

confidence: 99%

Effects of Water on Natural Stone in the Built Environment—A Review

et al. 2021

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The present work reviews studies with information on the effects of water by itself on stones of the built environment both to assess the impact of this substance and to discuss possible implications for conservation. The analysis concerns empirical results from previous publications dealing with the effects, on several rock types, of freeze–thaw, wetting, erosion by running water and substances resulting from the water–stone interaction. Laboratory studies have shown that water freezing can cause physical damage even in low porosity rocks. As far as we know, this is the first review that considers comparative laboratory studies of freeze–thaw and salt crystallization on the same rock specimens, and these point to lower erosive effects than salt weathering, as freeze–thaw can provoke catastrophic cracking. Wetting has shown strong damaging effects on some fine-grained clastic rocks. Erosive features have been reported for rain exposition and for some fountain settings albeit, in these field studies, it could be difficult to assess the contribution of pollutants transported by water (this assessment could have meaningful implications for stone conservation, especially in fountain settings). Water also interacts with stone constituents, namely sulfides and soluble salts, releasing substances that could impact those stones. Sulfides are a relatively frequent issue for slates and granites, and our observations suggest that for this last rock type, this issue is mostly associated with the presence of enclaves and, hence, avoiding the surface exposition of such enclaves could solve the problem.

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Minero-petrographical, physical, and mechanical properties of moderately welded ignimbrite as a traditional building stone from Uşak Region (SW Turkey)

Cited by 13 publications

References 53 publications

Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru

Effects of Water on Natural Stone in the Built Environment—A Review

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