Strength anisotropy in building granites

Forestieri, Giulia; Freire-Lista, David Martín; Francesco, Anna Maria De; Ponte, Maurizio; Fort, Rafael

doi:10.1080/15583058.2017.1354096

Cited by 9 publications

(7 citation statements)

References 48 publications

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“…The application of NDT is, therefore, especially interesting in the case of architectural heritage. One of the most common NDT techniques to estimate the mechanical properties of building materials is the ultrasonic pulse velocity (UPV) method, which has been proved to be useful to identify the mechanical properties, anisotropy, compactness and presence of discontinuities in rocks (7)(8)(9)(10)(11). Several works have applied this technique to assess the state of conservation of historical buildings (8,(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

“…One of the most common NDT techniques to estimate the mechanical properties of building materials is the ultrasonic pulse velocity (UPV) method, which has been proved to be useful to identify the mechanical properties, anisotropy, compactness and presence of discontinuities in rocks (7)(8)(9)(10)(11). Several works have applied this technique to assess the state of conservation of historical buildings (8,(12)(13)(14). UPV also has been used in combination with other NDT techniques, such as ground-penetrating radar, which has a wide range and allows high resolution of up to ten centimeters from a centimeter (14), and the Leeb rebound hardness test (7).…”

Section: Introductionmentioning

confidence: 99%

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Free-free resonance method for the mechanical characterization of carbonate rocks used as building stones

et al. 2022

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Nondestructive testing techniques have attracted growing interest in the last few years due to their ability to assess material properties without damaging the specimens. The free-free resonance method is a nondestructive testing technique based on the analysis of the natural frequencies of a sample. This study presents and discusses the applicability of this technique, traditionally used on soils, for the mechanical characterization of rocks. With this aim, the free-free resonance method is used to obtain the dynamic elastic modulus and shear modulus of four carbonate rocks that have been widely used as construction materials in southern Spain. The results from the nondestructive evaluation of dry and saturated rocks, in combination with petrographic characterization and uniaxial compression tests, make it possible to assess the existing relationships between the mechanical properties of carbonate rocks and to evaluate the impact of porosity and moisture content on their mechanical behavior.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Free-free resonance method for the mechanical characterization of carbonate rocks used as building stones

et al. 2022

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“…In previous works, it has been demonstrated that micro-cracks are already formed at lower temperatures [20] due to thermal expansion [21], cooling [22], or being linked to thermal cycles of 20 • C to 105 • C [23,24]. Temperature increase generates stresses in granitic rocks [25] which is also associated with the anisotropy of granite micro-texture [26,27]. Understanding such behavior and cracking-linked damage of the granitic rocks need further studies.…”

Section: Introductionmentioning

confidence: 99%

Physical Alteration and Color Change of Granite Subjected to High Temperature

2021

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Cylindrical specimens obtained from the monzogranite host rock of the National Radioactive Waste Repository of Hungary were tested at room temperature and 250 °C, 500 °C, and 750 °C of heat treatment. Reflectance spectra (color), bulk density, Duroskop surface hardness, and ultrasound-wave velocity values were measures before and after thermal stress. According to CIE L*a*b* colorimetric characteristics, the specimens’ color became brighter and yellower after the heat treatment. At 750 °C, a significant volume increase was recorded linked to the formation of macro-cracks, and it also led to the drop in bulk density. Smaller temperature treatment (250 °C) caused a minor decrease in density (−1.3%), which is higher than the reduction of density at 500 °C (−0.8%). Duroskop surface strength showed a slight decrease until 500 °C, and then a drastic decline at 750 °C. P- and S-wave velocity values tend to decrease uniformly and significantly from room temperature to 750 °C. P-wave velocity and Duroskop values have a high exponential correlation at elevated temperatures. Physical alterations originated from the differential thermal-induced expansion of minerals, the formation of micro-cracks. Mineralogical changes at higher temperatures also contribute to the volume change and the loss in strength.

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“…Due to Grisolia stone's historical and architectural importance, several authors have studied it extensively from a geological point of view (3)(4)(5)(6). Nevertheless, complete petrophysical and mechanical characterization has not yet been performed.…”

Section: Introductionmentioning

confidence: 99%

Petrophysical-mechanical behavior of Grisolia stone found in the architectural heritage of southern Italy

Forestieri

Buergo

2019

Mater. construcc.

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Grisolia is one of the building stones most commonly found in the architectural heritage of southern Italy. Also known commercially as “gold stone” for its yellow intrusions, Grisolia was employed by the leading Calabrian schools of stonemasons, principally in the southern Italian regions of Calabria and Basilicata. It is an Upper Triassic crystalline carbonate quarried in the Verbicaro Unit on Calabria’s northern Tyrrhenian coast. Possessing petrographic, physical and mechanical properties that ensure stone strength and durability, it is a high-quality building material suitable for structural and ornamental uses. These properties can be attributed to its low open porosity and excellent hydric behavior (low capillary water absorption), as well as to its high mechanical strength and low anisotropy. These characteristics make it recommendable as a building material for both restoration and new construction.

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Strength anisotropy in building granites

Cited by 9 publications

References 48 publications

Free-free resonance method for the mechanical characterization of carbonate rocks used as building stones

Free-free resonance method for the mechanical characterization of carbonate rocks used as building stones

Physical Alteration and Color Change of Granite Subjected to High Temperature

Petrophysical-mechanical behavior of Grisolia stone found in the architectural heritage of southern Italy

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