Properties and characterization of a clay raw material from Miličinica (Serbia) for use in the ceramic industry

Milošević, Maja; Logar, Mihovil

doi:10.1180/claymin.2017.052.3.04

Cited by 15 publications

(12 citation statements)

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“…Raw clays have complex chemical, mineralogical and physical properties that may be useful in manufacturing processes ( e.g. Felhi et al , 2008; Mitrović et al , 2009; Hammami-Ben Zaied et al , 2015; Boussen et al , 2016; Milošević & Logar, 2017; Milošević et al , 2017; Tsozué et al , 2017, etc. ).…”

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confidence: 99%

Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

et al. 2019

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This study focuses on the mineralogical characterization of four raw clay samples from Dobrodo deposit, Serbia. Several analytical methods were applied to determine the chemical and mineralogical composition, morphology and physical properties (colour, plasticity, specific surface area, particle size and cation-exchange capacity) of the clay samples. Kaolinite, smectite and illite are the predominant phases in all of the samples studied that contain between 60.2 and 87.1 wt.% of clay. Quartz, feldspars, paragonite and Ti- and Fe-bearing phases were also identified. The relatively high SiO2/Al2O3 mass ratio indicates abundant quartz. The cation-exchange capacity of the samples varied between low and moderately charged clay minerals (12–52 mmol 100 g–1) with specific surface area values ranging from 94 to 410 m2 g–1. The plasticity index values (11–23%) suggest low to moderate plasticity. Preliminary results show that most of the raw clay from Dobrodo deposit might be suitable for use in ceramic applications.

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Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

et al. 2019

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“…Extrusion involves the forced pushing of the raw material through a fixed profile to gain a desired shape. As previously stated, extrusion of clay material requires an optimal PI that is between 10% and 34% (Abajo, 2000; Vieira et al , 2008; Milošević & Logar, 2017). When plotted on a plasticity diagram, the ClMx sample is acceptable for extrusion, while the ClBd sample might be used in the manufacture of bricks and pottery, but it is not acceptable for extrusion (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…The K 2 O (1.01 wt.%) is associated with the presence of minor K-feldspar or mica (illite or muscovite) (Monterio & Vieira, 2004; Celik, 2010), while the MgO (0.76 wt.%) is attributed to minor smectite or chlorite (Montana et al , 2011). The slightly larger amount of Fe 2 O 3 (~5 wt.%) may be derived from the hydroxides/oxides in the raw material and may produce red-coloured ceramics (Abajo, 2000; Murray, 2007; Daghmehchi et al , 2018; Milošević et al , 2019a), which is still acceptable in ceramics (Baccour et al , 2008) as a ‘dark-firing’ ceramic body (Dondi et al , 2001; Milošević & Logar, 2017). The relatively large loss on ignition (LOI; 15.86%) may be related to dehydroxylation of hydrated minerals or hydroxides, oxidation of organic materials and decomposition of carbonates (Milheiro et al , 2005; Baccour et al , 2008; Abdelmalek et al , 2017).…”

Section: Resultsmentioning

confidence: 99%

“…A smaller amount of illite occurs in the form of fibres and laths. Halloysite or disordered kaolinite is observed as rolled, platy to elongated tubular particles and is present in minor amounts compared to the kaolinite content (Frost et al , 2002; Joussein et al , 2005; Milošević & Logar, 2017). The ClBd sample contains abundant large calcite particles, and the greater calcium content when compared to the ClMx sample is also confirmed by EDX analysis (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

2020

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The production of pottery in the traditional manner using local raw materials can provide insights into the provenance of ancient artefacts. This study uses mineralogical analysis to evaluate the raw clays and tempers used for pottery production in Zlakusa (western Serbia). Particle-size distribution, plasticity, X-ray fluorescence spectroscopy, X-ray powder diffraction, scanning electron microscopy/energy-dispersive X-ray spectrometry and differential thermal analysis techniques were applied. The mineral phases identified in the raw clay sample are kaolinite/halloysite, mica/illite, smectite, quartz, paragonite, feldspar, calcite and hematite. The clay body sample is a mixture of raw clay and crushed calcite in a ∼50:50 ratio, which was confirmed using various techniques. We have also considered and investigated the technological potential of the sampled materials, taking into consideration their actual and potential applications. It was confirmed that the clay body may be used in the manufacture of bricks and pottery, but its industrial application is limited by the paste recipe.

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“…In order to compare the quality of the samples for utilization in the construction industry, the whiteness index (WI) values of raw phosphogypsum and recrystallized gypsum were measured. The WI was determined from the luminous reflectance, as described by Milošević & Logar (2017).…”

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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

et al. 2020

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Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles. In these tests, phosphogypsum was separated into recrystallized (purified) gypsum, insoluble residue and supernatant. Both raw phosphogypsum and recrystallized gypsum were examined using inductively coupled plasma optical emission spectrometry, X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry. The activity concentrations of 238U, 235U, 226Ra, 210Pb, 232Th and 40K were investigated using γ-ray spectrometry. Based on the activity concentration results, a number of radiometric parameters were calculated for the original and recrystallized phosphogypsum (i.e. radium equivalent activity, γ indices for construction materials, α index and external and internal hazard indices). Raw phosphogypsum samples showed greater mean activity concentration levels of 238U and 226Ra than the international recommended limits, while the recrystallized gypsum demonstrated notably lower activity concentrations for these two isotopes. The activity concentration of 226Ra in recrystallized gypsum is ~6 times lower than in raw phosphogypsum. Therefore, recrystallized gypsum does not present a radiation hazard when used as a building material, while raw phosphogypsum meets the requirements only for road construction materials.

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Properties and characterization of a clay raw material from Miličinica (Serbia) for use in the ceramic industry

Cited by 15 publications

References 39 publications

Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

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