A new quality factor for the building stone industry: a case study of stone blocks, slabs, and tiles

Yarahmadi, Reza; Bagherpour, Raheb; Taherian, Sayed-Ghahreman; Sousa, Luís

doi:10.1007/s10064-017-1040-5

Cited by 9 publications

(18 citation statements)

References 38 publications

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“…The competitiveness in the building stone industry demands a clear picture of the possibilities of the different uses for each stone, point outing the qualities but also the limitations (Carvalho et al 2013;Mustafa et al 20126;Yarahmadi et al 2019b). Different purposes as new construction or monument rehabilitation demand detailed information to ensure the best choice.…”

Section: Introductionmentioning

confidence: 99%

Petrophysical properties of limestones: influence on behaviour under different environmental conditions and applications

et al. 2021

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Limestones have wide variety, namely by differences in the process of formation, mineralogical composition, grain size and texture. Such variability leads to differences in weathering characteristics and behaviour under different environmental conditions and applications. Therefore, detailed studies are mandatory to assess the main factors controlling the physicalmechanical properties and the durability to propose the best applications for the limestones. This study presents the petrographic and petrophysical data of eleven selected Portuguese limestones. Texture, mineralogy and porosity were identi ed as key parameters for the durability of limestones. Two main groups were identi ed regarding the texture/petrography and weathering resistance; the compact micritic limestones and with the sparitic grainstones. For the rst time an outstanding bowing behaviour was identi ed in a limestone, probably related with clay swelling minerals and iron oxides present in the micrite groundmass around or in the stylolitic planes.

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Section: Introductionmentioning

confidence: 99%

Petrophysical properties of limestones: influence on behaviour under different environmental conditions and applications

et al. 2021

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“…For natural defects in ornamental stone, Proença et al ( 2016 ) applied a methodology based on wavelets for automatic detection of defects in limestone slabs, defining their location and delimitation. Regarding stone non-uniformities, Yarahmadi et al ( 2017 ) established a quality factor considering three factors: shape quality (α), aesthetic quality (β) and discontinuity coefficient (γ). It can be applied to stone blocks or products from stone processing plants, namely slabs and tiles (2D and 3D).…”

Section: Introductionmentioning

confidence: 99%

Natural stone heterogeneities and discontinuities: an overview and proposal of a classification system

Pereira¹,

Dionísio²,

Garcia³

et al. 2023

Bull Eng Geol Environ

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Portugal has a relevant role in natural stone production and trading. The national sector has been trying to follow the requirements of the Fourth Industrial Era, where automation of stone processing operations is necessary to increase productivity, balance the decreasing workforce and reduce stone waste. The identification of defects or defective areas in stone slabs is a time-consuming operation: not only highly subjective, dependent on the operator experience, but also disconnected from geological knowledge. Despite recent advances in automatic pattern recognition of stone products’ surface, stone selection lacks a geological foundation. Thus, this paper aims to discuss the terminology of stone defects and singularities applied to stone materials and in the stone selection process. A classification system of natural stone heterogeneities and discontinuities is developed to be used by stone operators and to be applied in future image analysis research. The system, based on three main classifiers (colour heterogeneities, textural and structural heterogeneities, and discontinuities) is validated by seventeen different Portuguese stone varieties and appears to be a suitable qualitative descriptor of stone slabs and tiles, showing flexibility in its use.

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“…To realize this critical point, it is crucial to concentrate more on geological conditions in the deposits, to optimize a sustainable extraction of resources (Siegesmund and Török 2014). There are several conditioning factors of the exploitation and utilization of the building stones, some related with material itself like the physico-mechanical properties and others with geological constraints at outcrop scale (Carvalho et al 2013;Yarahmadi et al 2015Yarahmadi et al , 2019aYarahmadi et al , 2019bMustafa et al 2016;Sousa et al 2017Sousa et al , 2018Siegesmund et al 2018;Sousa 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The final block size and quality of the blocks are influenced by several factors like microcracks, fissures, bedding planes, joints, and faults (Palmström 2001;Yarahmadi et al 2017) (Fig. 2), despite of some of them only are identified during the processing stage when the slabs breaks under high pressure (Yarahmadi et al 2019b).…”

Section: Introductionmentioning

confidence: 99%

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Building stone quarries: resource evaluation by block modelling and unmanned aerial photogrammetric surveys

2021

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The production of building stones shown an exponential growth in last decades as consequences of the demand and developments in the extraction and processing techniques. From the several conditioning factors affecting this industry, the geological constrains at quarry scale stands out as one of most important. Globalization and increasing competition in the building stone market require large raw material blocks to keep further processing as cost-effective as possible. Therefore, the potential extraction volume of in-situ stone blocks plays an important role in the yield of a dimensional stone quarry. The full characterization of the fracturing in the quarries comes up as fundamental in the assessment of the in-situ blocks volume/shape and potential extracted raw blocks. Identify the joint sets present, their spacing and the differences across the quarry demands a continuous assess during the quarry live span. Information from unmanned aerial vehicles helps in the field survey, namely trough digital surface models, orthophotos, and three-dimensional models. Also, the fracturing modelling by specific software programs is crucial to improve the block size assessment and the increase the quarry yield. In this research fracturing of twenty-one quarries of granite, limestone, marble, and slate from Portugal were assessed by combining field surveys with new techniques. From the studied quarries several cases were selected and presented to highlight the importance of this combined methodology in the fracturing assessment and how they can be helpful in the maximization of the resources and quarry management.

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A new quality factor for the building stone industry: a case study of stone blocks, slabs, and tiles

Cited by 9 publications

References 38 publications

Petrophysical properties of limestones: influence on behaviour under different environmental conditions and applications

Petrophysical properties of limestones: influence on behaviour under different environmental conditions and applications

Natural stone heterogeneities and discontinuities: an overview and proposal of a classification system

Building stone quarries: resource evaluation by block modelling and unmanned aerial photogrammetric surveys

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