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Cementitious Composites for Civil Construction Made with Marble and Granite Waste
Published in R.A. Ilyas, S.M. Sapuan, Emin Bayraktar, Recycling of Plastics, Metals, and Their Composites, 2021
M.G.A. Ranieri, P. Capellato, M.A. de B. Martins, V.C. dos Santos, P.C. Gonçalves, L.R. Roque-Silva, M.L.M. Melo, A. da S. Mello
X-ray diffraction is one of the most common and efficient analyses to chemically characterize myriad materials. This technique is most suited for determining the crystalline phases in solid materials and provides information about the structural arrangement of the atoms that comprise a given solid, indicating if the sample possesses solid crystalline or amorphous characteristics based on the presence or absence of peaks in the diffractogram. Figure 21.5 presents the diffractogram for the MGR residue, and it demonstrates that dolomite CaMG(CO3)2, calcite (CaCO3) and quartz (SiO2) are present. The peaks obtained specifically indicate the presence of quartz, albite (NaAlSi3O8), calcite and dolomite. The results are similar to those found by Cosme et al. (2016), Sadek et al. (2016), Singh et al. (2017), Soltan et al. (2016) and Vardhan et al. (2015). Marble is a metamorphic rock and its residue presents calcite and dolomite as predominant minerals, typical of the carbonate rocks. Granite is an igneous rock made up principally of quartz, feldspar and mica (Cosme et al., 2016; Sadek et al., 2016; Singh et al., 2010; Soltan et al., 2016; Vardhan et al., 2015).
Computer assisted planning for extraction of ornamental granite
Published in G. N. Panagiotou, T. N. Michalakopoulos, Mine Planning and Equipment Selection 2000, 2018
Aarão de Andrade Lima, Marcos Roberto Kalvelage, Giorgio de Tomi, Nelson Senhorinho Silva
The extraction of granite blocks for ornamental stone has become an important economic activity in many countries recently. In Brazil, the initial projects favored the recovery of blocks from granite boulders, because less development is required for the quarry, and less investment is needed for equipment acquisition. However, recently the increased international competition has forced the producers of granite to quarry directly the rock mass in search of larger proved reserves of more uniform and less altered rocks. In addition, the extraction of granite from boulders have caused severe environmental disturbances. However, the detailed planning required quarrying granite from the rock mass has not been implemented in the current operations. As a result, many quarries have been abandoned after initial development due to adverse geologic factors, such as the existence of closely spaced joints, dikes, veins, faults, inclusions, and alterations.
Granitic rocks
Published in W. A. Peck, J.L. Neilson, R.J. Olds, K.D. Seddon, Engineering Geology of Melbourne, 2018
As a guide, moderately and less weathered granite are considered to require the use of explosives for economical removal. Highly weathered granite can generally be excavated by appropriate bulldozer and ripper combination or by use of explosives. An excavator can be used for extremely weathered or in some cases highly to extremely weathered granite. However, trials are often necessary to confirm the excavation characteristics of granite in a particular area as they will be affected by defect spacing and rock texture.
Feldspar Purification from Iron Impurities: A Review of Treatment Methods
Published in Mineral Processing and Extractive Metallurgy Review, 2023
Fatima Baila, Tariq Labbilta, Yassine Darmane
Block cutting is one of the processes of industrial exploitation of granite to form usable products as construction materials for commercial purposes (Singh et al. 2016). This operation generates massive granite waste; about 30% by mass of the raw material is lost as offcuts (Rajgor et Pitroda 2013). In Morocco, the disposal of these wastes causes serious problems, they are sent to uncontrolled landfills (Hemidat et al. 2022), which has widespread negative consequences for the environment (Singh et al. 2016). Several studies and efforts have been made to manage these wastes and solve the associated problems, among them their recovery and recycling.
The determination of concentrations of radioisotopes in some granite samples in Turkey and their radiation hazards
Published in Radiation Effects and Defects in Solids, 2018
Granite is a form of igneous rock, composed primarily of Quartz, Alkalie and Feldspar, which contains some radionuclides (14). For example, the white or pink feldspars contain 40K, the black biotites and the hornblendes contain 40K, 238U and 232Th, and the zircon, apatite, sphene and minerals contain 238U and 232Th (20). The presence of radium and its parent nucleus uranium in the earth (14) is generally associated with emission of 222Rn from earth’s crust (25–28).
A review of dust emission dispersions in rock aggregate and natural stone quarries
Published in International Journal of Mining, Reclamation and Environment, 2018
M. Sairanen, M. Rinne, O. Selonen
Some quarries follow different processes in their operations, but the drilling, blasting, hydraulic impact hammering and crushing are commonly employed with hard stone material, like granite. In quarrying softer rocks like sandstone, shearers or sawing are adopted to gain fragmented rock material or stone blocks.