Influence of calcite in a ceramic body on its thermophysical properties

Kováč, J.; Trník, Anton; Medveď, Igor; Vozár, Libor

doi:10.1007/s10973-013-3084-5

Cited by 14 publications

(8 citation statements)

References 13 publications

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“…They are 0.20 mm 2 •s −1 for the green samples at room temperature and 0.07 mm 2 •s −1 for the samples measured at 1000 °C. A similar decreasing trend of the thermal diffusivity of clays was obtained in [17,49]. The values were from 0.17 to 0.27 mm 2 •s −1 .…”

Section: Thermal Diffusivitysupporting

confidence: 79%

“…The partial substitution of raw materials with waste or new materials can improve the properties of ceramic products and also reduce the cost of their production [1]. Nowadays, many published studies deal with partial substitution of traditional input raw materials for production of ceramics by waste materials such as fly or bottom ash [2][3][4][5][6][7][8][9][10][11][12], waste glass [13][14][15][16], waste calcite [17], etc. Húlan et al [7] determined that a higher Young's modulus was reached after sintering with a lower amount of fly ash.…”

Section: Introductionmentioning

confidence: 99%

“…They also found that the partial replacement of natural clay in a brick with waste soda-lime glass made the brick production sustainable and eco-friendly. Kováč et al [17] showed that a high content of waste calcite may double the energy consumption during the creation of anorthite at a temperature of 950 • C and also that the waste calcite had a slight positive effect on the final contraction of samples.…”

Section: Introductionmentioning

confidence: 99%

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Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

et al. 2021

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In this study, the thermophysical properties such as the thermal expansion, thermal diffusivity and conductivity, and specific heat capacity of ceramic samples made from kaolin and natural zeolite are investigated up to 1100 °C. The samples were prepared from Sedlec kaolin (Czech Republic) and natural zeolite (Nižný Hrabovec, Slovakia). Kaolin was partially replaced with a natural zeolite in the amounts of 10, 20, 30, 40, and 50 mass%. The measurements were performed on cylindrical samples using thermogravimetric analysis, a horizontal pushrod dilatometer, and laser flash apparatus. The results show that zeolite in the samples decreases the values of all studied properties (except thermal expansion), which is positive for bulk density, porosity, thermal diffusivity, and conductivity. It has a negative effect for thermal expansion because shrinkage increases with the zeolite content. Therefore, the optimal amount of zeolite in the sample (according to the studied properties) is 30 mass%.

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Section: Thermal Diffusivitysupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

et al. 2021

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“…gehlenite ? anorthite [17,18]. This process occurs in two steps: (1) Metastable gehlenite is formed from the reaction between metakaolinite and calcium oxide, and (2) anorthite is formed from the reaction between gehlenite and free silica from the metakaolinite breakdown.…”

Section: Resultsmentioning

confidence: 99%

Thermal behavior of ceramic wall tile pastes bearing solid wastes

Faria

Holanda

2015

J Therm Anal Calorim

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This work focuses on the thermal behavior of ceramic wall tile pastes containing solid wastes such as flat glass waste and sugarcane bagasse ash waste in partial replacement of natural raw materials. Thermal and mineralogical transformations occurring during firing were characterized by differential thermal analysis, thermogravimetry analysis (TG), X-ray diffraction (XRD), and scanning electron microscopy coupled with energy-dispersive spectroscopy. On heating four endothermic events within the 48.4-63.1, 271.0-279.1, 555.9-560.2, and 856.1-863.1°C, temperature ranges were observed. The endothermic valleys could be mainly attributed to the release of physically adsorbed water, dehydration of hydroxides (gibbsite and goethite), dehydroxylation of kaolinite, and decomposition of carbonates (calcite and dolomite), respectively. All tile pastes presented an exothermic peak within the 950.0-952.1°C temperature range associated with the crystallization of new mineral phases such as anorthite, gehlenite, mullite, and diopside. However, the tile paste with addition of sugarcane bagasse ash waste also presented an exothermic peak around 581.4°C associated with the decomposition of organic compounds. TG results indicate that the total mass loss of the wall tile pastes is in the 15.1-16.8 % range, and it depends on the added solid waste. It was found that the replacement of natural raw materials (kaolinic clay and quartz) with solid wastes (flat glass waste and sugarcane bagasse ash waste), in the range up to 5 mass%, influenced the thermal behavior of the ceramic wall tile pastes. The thermal analysis results agree well with the XRD, physical properties, and sintered microstructure.

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“…However, their accuracy and reproducibility is often arguable [6]. Among the transient methods, the hot wire method [7], hot ball method [8], step-wise transient method [9], pulse transient method [10], hot plane or disk transient method [11], and laser flash method [12] are frequently used at the investigation of thermal properties of solids.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Cement Based Composites with Municipal Solid Waste Incinerator Fly Ash Accessed by Two Different Transient Methods

Fořt¹,

Trník²,

Scheinherrová³

et al. 2016

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Thermal properties of cement composite with Mixed Fly Ash (MFA) from different parts of Municipal Solid Waste Incineration (MSWI) process as a partial replacement of Portland cement are researched in the paper. MFA is applied in the amount of 10 %, 20 % and 30 % of the mass of cement, while sand and water quantities are kept constant. For the sake of comparison, a reference mixture with Portland cement as the only binder is studied as well. For the characterization of studied materials, their basic physical properties as bulk density, matrix density and total open porosity are measured using gravimetric method combined with helium pycnometry. Among the thermal properties, thermal conductivity, thermal diffusivity and specific heat capacity are accessed by two transient methods having different experimental arrangement and time of measurement. The measured data obtained by the particular methods are compared and the applicability of the methods for the measurement of thermal properties of solid building materials is discussed.

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Influence of calcite in a ceramic body on its thermophysical properties

Cited by 14 publications

References 13 publications

Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

Thermal behavior of ceramic wall tile pastes bearing solid wastes

Thermal Properties of Cement Based Composites with Municipal Solid Waste Incinerator Fly Ash Accessed by Two Different Transient Methods

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