Assessment of the Technological Properties of High Temperature Fired Clayey Ceramics Incorporated with Glass Waste

2015 ◽  
Vol 820 ◽  
pp. 449-454
Author(s):  
Alline Sardinha Cordeiro Morais ◽  
Thais Mardegan Louzada ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
Carlos Mauricio Fontes Vieira
Keyword(s):  
High Temperature ◽  
Water Absorption ◽  
Glass Powder ◽  
Linear Shrinkage ◽  
Substantial Improvement ◽  
Industrial Wastes ◽  
Technological Properties ◽  
Glass Waste ◽  
Fluorescent Lamps ◽  
Higher Temperature

The incorporation of industrial wastes into clayey ceramics used in civil construction is becoming a worldwide procedure not only to provide an environmentally correct destination for the waste but, in some cases, to improve the ceramic properties. The objective of the present work was to evaluate the effect of incorporation of a glass powder waste from decontamination process of fluorescent lamps into clayey ceramics. This evaluation was performed based on the technological properties of water absorption, linear shrinkage ad flexural strength. The properties evaluation was complemented by optical microscopy structural observation. The glass waste was incorporated in up to 30 wt% and specimens were uniaxially pressed at 20 MPa and fired at a relatively higher temperature of 1000°C. The results confirmed a substantial improvement of both the water absorption and the strength with glass waste incorporation into clayey ceramics.

Quality Technological Properties of Foundry Exhaust Dust as Alternative Ceramic Coating Raw Materials

2015 ◽  
Vol 1088 ◽  
pp. 395-398
Author(s):  
Luiz Oliveira Veriano dalla Valentina ◽  
Marilena Valadares Folgueras ◽  
Wanessa Rejane Knop ◽  
Maria Cristina Pacheco do Nascimento ◽  
Glaucia Aparecida Prates
Keyword(s):  
Water Absorption ◽  
Bulk Density ◽  
Ceramic Coating ◽  
Raw Materials ◽  
Linear Shrinkage ◽  
Inert Atmosphere ◽  
Technological Properties ◽  
Foundry Industry ◽  
Ceramic Manufacturing ◽  
Materials Used

The work evaluates the possibility of the use the exhauster powder generated in the foundry process in ceramic mass atomized semigre type. The raw materials used were semi-stoneware kind atomized powder used on the coating ceramic manufacturing and dust exhaust byproduct supplied by a foundry industry both from brazilian industries . Tests were conducted using a heating rate of 10o.C / min and oxidant and / or inert atmosphere. Specimens contained different amounts of byproduct to the extent of 30% by mass, in order to verify the maximum addition of byproduct and were used in order to analyze the technological properties evaluation (water absorption linear shrinkage, bulk density). at the temperature of 1100 ° C showed higher difference between the results obtained and 1200o C this difference decreased.

Properties of High Temperature Sintered Clay Ceramic Added with Multi-Wire Sawn Granite Waste

2014 ◽  
Vol 775-776 ◽  
pp. 69-74 ◽  
Author(s):  
Monica Castoldi Borlini Gadioli ◽  
Mariane Costalonga de Aguiar ◽  
Carlos Maurício Fontes Vieira ◽  
Verônica Scarpini Candido ◽  
Sérgio Neves Monteiro
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Flexural Strength ◽  
Water Absorption ◽  
Linear Shrinkage ◽  
Huge Amount ◽  
Ornamental Stones ◽  
The World ◽  
Alkaline Oxides

Brazil is currently one of the world leading producers and exporters of ornamental stones. The increasing production also generates a proportionally huge amount of wastes. Depending on stones such as granite, these wastes may be composed of relatively high content of alkaline oxides. This is a low melting point flux with advantage for a potential addition of the waste into common clay ceramic. Thus, the present work investigated the addition of a granite waste, generated during the sawing stage using the multi-wire technology, into clayey ceramics fired at 1200oC. This ceramic added with up to 30 wt% waste were evaluated in terms of linear shrinkage, water absorption and flexural strength. It was found that the waste fluxing compounds promoted a reduction in water absorption and increase in strength that are associated with an improved clayey ceramic.

scholarly journals Identification of an appropriate body composition for red clay products

Cerâmica ◽  
2010 ◽  
Vol 56 (339) ◽  
pp. 285-290 ◽  
Author(s):  
P. Hettiarachchi ◽  
J. T. S. Motha ◽  
H. M. T. G. A. Pitawala
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Linear Shrinkage ◽  
The Body ◽  
Technological Properties ◽  
Red Clay ◽  
Silt Fraction ◽  
Quality Product

This study focuses on the identification of an appropriate composition of raw materials for ceramic products from commonly available red clays in Sri Lanka. The raw materials were characterized in terms of particle size distribution, chemical and mineralogical composition. Different formulations of samples were prepared, and the linear shrinkage, water absorption and flexural strength of the final products were measured. Microstructures of fired samples were observed under a scanning electron microscope. The best quality product was obtained when the sample contains a high amount of illite clay in a mixture of 80 wt.% clay-silt and 20 wt.% sand. The presence of higher concentrations of the metal oxides Na2O, K2O and Fe2O3 (total ~21 wt.%) in the clay-silt fraction of samples has resulted in obtaining higher technological properties of the body. The flexural strength and the water absorption of the product are 26.82 MPa and 6.51% respectively. If the raw materials contain lower amounts of the oxides Na2O, K2O and Fe2O3, higher amounts of clay-silt fraction (up to 90 wt.%) must be added to obtain an optimum quality product.

Effect of Calcined-Bauxite Quality and Secondary Mullitization Reaction on Firing and Properties of Ceramic Plates

2019 ◽  
Vol 960 ◽  
pp. 207-213
Author(s):  
Li Biao Xiao ◽  
Xiao Qing Hua ◽  
Qun Hu Xue
Keyword(s):  
High Temperature ◽  
Water Absorption ◽  
High Water ◽  
Linear Shrinkage ◽  
Modulus Of Rupture ◽  
Ceramic Plate ◽  
High Temperature Reaction ◽  
Low Modulus ◽  
Physical And Chemical ◽  
Main Factor

Addition of different types of calcined bauxites to the ceramic plate formulation was performed to study effects on the firing and properties of the resulting ceramic plates. The physical and chemical characteristics, high-temperature reaction degree, thermochemical behavior, mineral composition, and microstructure of the calcined bauxites were analyzed. The results showed that lightly calcined bauxite could minimize the linear shrinkage rate. However, incomplete high-temperature secondary mullitization reaction could inhibit completion of product sintering and result in a loose microstructure, high water absorption index, and low modulus of rupture. Application of GAL-85 high-temperature calcined bauxite yielded a product with good sintering performance and low water absorption; increased amounts of mullite reinforcement phase also increased the strength of the plate. The degree of secondary mullitization was the main factor affecting the performance of the ceramic plate.

Influence of Firing Temperature on the Behavior of Clay Ceramics Incorporated with Elephant Grass Ash

2014 ◽  
Vol 798-799 ◽  
pp. 526-531 ◽  
Author(s):  
Aline Marcia Ferreira Dias da Silva ◽  
Rosane Toledo ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira ◽  
...  
Keyword(s):  
Water Absorption ◽  
Firing Temperature ◽  
Rupture Strength ◽  
Linear Shrinkage ◽  
Standard Test ◽  
Elephant Grass ◽  
Technological Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Clay Ceramics

The microstructural and technological properties of clay ceramic incorporated with 10 and 20 wt% of elephant grass ashes were investigated at different firing temperatures of 650, 850 and 1050oC. X-ray diffraction were used to obtain the minerals and phase compositions. The microstructure was analyzed by scanning electron microscopy. The technical properties related to water absorption, linear shrinkage and flexural rupture strength were obtained by standard test. The results showed significant changes in the microstructure and phasic composition with increasing firing temperature. A marked improvement in the water absorption, decreasing to 18% as well as increase in strength, above 5 MPa, was found at 1050°C. However, only a slight contribution might be attributed to the incorporation of elephant grass ash. Nevertheless, its use as a by-product and the associated saving in clay are relevant environmental and economical advantages.

Characterization of Fluorescent Lamp Glass Waste Powders

2012 ◽  
Vol 727-728 ◽  
pp. 1579-1584 ◽  
Author(s):  
Alline Sardinha Cordeiro Morais ◽  
Thaís Cristina da Costa Caldas ◽  
Sérgio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Glass Powder ◽  
Fluorescent Lamp ◽  
Glass Waste ◽  
X Ray ◽  
Fluorescent Lamps ◽  
Clay Body ◽  
Scanning Electron

Industrialized component wastes, regularly discarded by the society, are increasingly contributing to the environmental pollution. The glass of these lamps is contaminated with mercury, which a serious hazard due to conventional recycling by melting with other glasses. A possible solution could be its incorporation into a clay body to fabricate common fired ceramics such as bricks and tiles. The objective of this work is to characterize a type of glass to be incorporated into a clayey ceramic. The glass analyzed was obtained from fluorescent lamps, which was passed through mercury decontamination process and ground into powder. This glass powder was tested for X-ray fluorescence, DTA/DTG, optical microscopy, scanning electron microscopy and optical dilatometry. The results showed that the glass presents sintering and softening points around 650 °C and 800 °C, respectively. The chemical analysis indicated the presence of impurities in considerable amounts in the composition of the fluorescent lamp glass waste.

Evaluation of Concretes Incorporated with Fluorescent Lamp Glass Waste

2014 ◽  
Vol 775-776 ◽  
pp. 566-570 ◽  
Author(s):  
Leonardo Gonçalves Pedroti ◽  
Carlos Maurício Fontes Vieira ◽  
Sergio Neves Monteiro ◽  
Veronica Scarpini Candido ◽  
Gustavo de Castro Xavier ◽  
...  
Keyword(s):  
Light Emission ◽  
Mercury Vapor ◽  
Industrial Wastes ◽  
Cement Matrix ◽  
Toxic Substances ◽  
Fluorescent Lamp ◽  
Glass Waste ◽  
Fluorescent Lamps ◽  
Operational Life ◽  
Technical Specifications

The increase amount of industrial wastes is becoming a serious worldwide environmental problem, which is aggravated by wastes containing toxic substances. This is the case of fluorescent lamps that use mercury vapor for light emission. At the end of their operational life these lamps should not be directly disposed to avoid the Hg toxic effects. Decontamination procedures take the Hg away but leave the other parts of the lamp as solid wastes. The mains part is the lamp glass, which finds many ways to be recycled. In the present work a fluorescent lamp glass waste was investigated as a possible material to be incorporated into a cement matrix as part of a civil construction concrete. Different amounts of waste up to 20 wt% were mixed with sand, gravel and cement to prepare concrete samples that were tested for the mechanical strength and water absorption in intervals of time until complete cure at 28 days. Although the waste failed to show pozzolanic activity, the incorporated concretes attended the required technical specifications.

Evaluation of Incorporation of Special Vitreous Residues in Mass for Porcelain Stoneware: Physical and Mechanical Properties

2015 ◽  
Vol 820 ◽  
pp. 600-604
Author(s):  
A.M.B Araújo ◽  
V.S. Porto ◽  
C.R.S. Morais ◽  
M.S.L. Cavalcanti
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Flexural Modulus ◽  
Physical And Mechanical Properties ◽  
Linear Shrinkage ◽  
Mechanical Tests ◽  
Fluorescent Lamps

This study aimed to technological alternatives for reuse of vitreous residues from fluorescent lamps, which cause damage to the environment. It was prepared mass to white ceramic with and without lamps residues replacing partially feldspar in proportions of 5% and 10%. Samples were molded and fired at 1000 ° C, 1100 ° C, 1150 ° C, 1200 ° C and 1250 ° C. Physical and mechanical tests were: water absorption, linear shrinkage and rupture by flexural modulus. Samples with 10% of residues reached stability at temperature less than 1250 ° C in all determined properties, confirming the feasibility of these residues in ceramic masses. To optimize the study, it was prepared other samples in proportions of 15% and 20% of waste, at the same level of burning and testing. Results obtained ratified the possibility of using these residues as a flux in ceramic slurries.

Effect of the Addition of the Waste Generated from the Feldspar Mining on the Obtainment of Ceramic Brick

2018 ◽  
Vol 930 ◽  
pp. 164-169 ◽  
Author(s):  
Felipe de Luca Sartor ◽  
Luís Philipe Spricigo ◽  
Danila Ferreira Niero ◽  
Adriano Michael Bernardin ◽  
Oscar Rubem Klegues Montedo ◽  
...  
Keyword(s):  
Water Absorption ◽  
Analysis Of Variance ◽  
Bending Strength ◽  
Statistical Significance ◽  
Linear Shrinkage ◽  
Technological Properties ◽  
Clay Brick ◽  
Ceramic Brick ◽  
Santa Catarina ◽  
Mining Company

TheNossa Senhora do Carmomining company, located at the southern of Santa Catarina (SC), Brazil, explores a large amount of feldspar to the ceramic market. As a result, waste is inevitable in the production and processing of the feldspar mineral, which results in an environmental impact. Therefore, this study aims to evaluate the effect of the addition of the waste coming from the feldspar mining in the composition of ceramic bricks. In this way, the waste and a clay mineral were characterized. The waste (0, 5, 15 and 25 wt%) was added to a composition of clay brick based on a standard clay fromMorro da Fumaça, Santa Catarina, Brazil. Specimens were extruded and sintered at temperatures of 1123, 1223, and 1323 K. The technological properties assessed in this study were linear shrinkage, water absorption and bending strength. The data were assessed by analysis of variance. The results showed the feasibility of adding 15 and 25 wt% of waste to the brick composition. All technological properties were improved when compared to pure samples, except for linear shrinkage. The analysis of variance showed significant and reproducible effects for the water absorption results. The results for linear shrinkage and bending strength showed no statistical significance.

Microstructural Analysis of Clayey Ceramics Incorporated with Fluorescent Lamp Glass Waste

2015 ◽  
Vol 820 ◽  
pp. 468-473 ◽  
Author(s):  
Thais Mardegan Louzada ◽  
Alline Sardinha Cordeiro Morais ◽  
Carlos Mauricio Fontes Vieira ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro
Keyword(s):  
Microstructural Analysis ◽  
Industrial Wastes ◽  
Fluorescent Lamp ◽  
X Ray Diffraction ◽  
Glass Waste ◽  
X Ray ◽  
Fluorescent Lamps ◽  
Sintering Mechanisms ◽  
Incandescent Lamps ◽  
Microstructural Mechanism

The recycling of industrial wastes has become a worldwide practice owing to environmental and economical advantages. In the case of waste addition to clayey ceramics for civil construction, this sustainable practice may also bring technical benefits. Fluorescent lamps, today replacing incandescent lamps, generate typical glass waste that can improve the properties of clayey ceramics. The fluxing behavior of the glass waste contributes to the ceramic sintering mechanisms by reducing the porosity. In the present work, the effect of incorporation of 30 wt% of Hg-cleaned fluorescent lamps glass waste was investigated by means of microstructural analysis. Waste incorporated clayey ceramics, fired at 850 and 1100°C were analyzed by optical and scanning electron microscopy as well as by X-ray diffraction. The results revealed the microstructural mechanism responsible for the improvement of the ceramic properties.

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