In fact, the quotient of roughness indexes, Ra, Rz and Rt computed for the two stones are 1.94, 1.84, 2.06 and 1.58, 1.65, 1.96, respectively, in low foot traffic areas and high foot traffic areas. It seems that initially flatter surfaces will suffer the wear action more rapidly and lose the initial surface properties.
As the UCS is a reflection of almost all physico-mechanical and petrographic properties, it could be used as an index property to evaluate the potential of granite as a dimension stone (Sousa 2013
Rui de Sousa Camposinhos (PhD EUR-ING) 2012, Proceedings of the Institution of Civil Engineers - Construction Materials. ... results of tests carried out according to the ASTM Standard Test Method for Strength of Individual Stone Anchorages in Dimension Stone. These tests were performed on a stiff rail continuous anchorage system on both the ...
The geometry of rock blocks is used for investigating the feasibility studies of dimension stone quarries (Sousa 2010; Saliu and Idowu 2014; Yarahmadi et al. 2015). …
Dimension stone design partial safety factors: a reliability based approach Rui de Sousa Camposinhos (PhD EUR-ING) Today's thin stone veneers must be designed to resist, besides their self-weight, high wind pressures and induced seismic forces.
Sousa, L.M., 2007. Granite fracture index to check suitability of granite outcrops for. ... Profitable dimensional stone production mainly depends on the number of extracted blocks. Compared to ...
Keywords: Supare Southwestern Nigeria, Dimension Stone, Volumetric joint count. Introduction The term 'dimension stone' covers a wide variety of naturally occurring stone used for the external and internal decoration of buildings. They include limestone, marble, sandstone, gabbro, granite, serpentine, and gneiss (Smith, 1999).
The profitability of stone quarries depends on the appearance (color and texture) and, more importantly, on the size of the blocks, which is determined by the three-dimensional discontinuity pattern of the rock mass. However, to date there is no comprehensive criterion by which to assess the size of blocks in quarries. The aim of the …
DOI: 10.1144/1470-9236/08-076 Corpus ID: 53632676; Evaluation of joints in granitic outcrops for dimension stone exploitation @inproceedings{Sousa2010EvaluationOJ, …
Izhar Ahmed 1,4 · Muhammad Basharat 1 · Luís Sousa 2,3 · Muhammad Saleem ... The use of marble as a building or dimension stone is one of the most growing commodities throughout the world. ...
In 2014, the world production of dimension stone reached 136,500 Mt, leaded by China with approximately 31.1%. Brazil is the fourth in the world ranking, contributing with 7.4% of the world's production. In the same year the Brazilian's granite exportation reached 2547 Mt [1]. Granite extensive mining generates an expressive volume of tailings ...
The main factors which increase the profitability of a dimension stone quarry are block size optimization and the focus on high quality raw materials as well as …
It is important to have a thorough knowledge of the petrographic characteristics of rocks to evaluate and understand their mechanical behavior. This paper deals with the influence of the texture and the mineral characteristics of nine Portuguese granites employed as dimensional stones. This study evaluates different mineral …
The most important goal of the exploration stage is to evaluate the productivity of a dimension stone reserve (Elci and Turk, 2014b, Mustafa et al., 2015, Mustafa et al., …
These types of dimension stone quarries are known from many parts of the globe and have been described from Italy (Negri et al ... guest edited by Siegfried Siegesmund, Luís Manuel Oliveira Sousa, and Rubén Alfonso López-Doncel. Rights and permissions. Open Access This article is licensed under a Creative Commons Attribution …
Geotechnical investigations of the Gahirat Marble depicted that it is a suitable stone for use as a dimension/building stone. The soundness test values ranged from 0.14% to 0.65%, as presented in the Table 3. The maximum soundness value was observed in sample GMC1 from the Chinar vicinity (0.65%), whereas the minimum value was found …
Page 1 of 2. Editorial to the topical collection "Building stones and geomaterials through history and environments: from quarry to heritage. Insights on the conditioning factors - The Rolf Snethlage-Volume". Environmental Earth Sciences. 2023-09 | Journal article. DOI: 10.1007/s12665-023-11095-8. Part of ISSN: 1866-6280. Part of …
2014, Stone Cladding Engineering. This volume presents new methodologies for the design of dimension stone based on the concepts of structural design while preserving the excellence of stonemasonry practice in facade engineering. Straightforward formulae are provided for computing action on cladding, with special emphasis on the effect of ...
The mean/median joint spacing value is very low, usually ranging between 1 and 5 m, in accordance with previous research in these granites (Sousa 2000(Sousa, 2007aSantos et al. 2016;Sousa et al ...
Some of them have a porphyritic texture (Sousa et al., 2005), and others have been exploited for dimension stone (Sousa, 2000). Methodology. ... Assuming that a dimension stone's rock mass comprised a large block of an intact rock, due to tectonics, the geomechanical properties of this block had direct effects on the discontinuities …
In fact, Portugal is one of the world's leading producers of building stones (Carvalho et al. 2018) and numerous authors have investigated the properties of its resources as dimensional stone ...
The dimension stone, commercially known as Marrom-Guaíba granite, is an alkali-feldspar quartz syenite rich in potassium and sodium exploited by Serra Geral …
PDF | On Mar 9, 2017, Luís Manuel OLIVEIRA SOUSA published Current Approaches in the Research of Dimension Stones:From Quarry to …
Luís Sousa, Department of Geology, University of Trás-os-Montes e Alto ... Some of the factors with an important role in stone dimension in the industry. References 1. IMM. …
DIMENSION-STONE CLADDING DESIGN WITH DOWEL ANCHORAGE. Stone, together with its support systems in a building's skin, needs to be compatible with the behaviour and performance of other interfacing systems, such as the curtain wall and superstructure frame. To this end, the design and installation of any properly mounted stone cladding will ...
Clearly, for stone with known quality, the amount of marketable dimensional stones (MDS) provides the best decision variable for planning (i.e. sequencing the operation of unit volumes). A method ...
Formation of the fracture system and its relevance for extraction of natural building stones. The fracture system of a geological body includes all planar elements, which result in a dissection of the rock body (Palmström 1995; Nikolayev et al. 2007; Mosch et al. 2007, 2011; Sousa et al. 2017).The essential basic types are faults, joints, cracks, …