scholarly journals Reformulating Ceramic Body Composition to Improve Energy Efficiency in Brick Manufacture

2021 ◽  
pp. 257-268
Author(s):  
G. Wie-Addo ◽  
A. H. Jones ◽  
S. Palmer ◽  
V. Starinieri ◽  
J. Renshaw ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Water Absorption ◽  
Nepheline Syenite ◽  
Ceramic Body ◽  
Mercury Porosimetry ◽  
Analytical Techniques ◽  
Linear Shrinkage ◽  
Volumetric Shrinkage ◽  
Brick Clay ◽  
Improve Energy Efficiency

AbstractThe influence of inorganic minerals (colemanite and nepheline syenite) as additives for sustainable clay brick manufacture has been examined. Each additive was added at 4 wt% to 96 wt% brick clay and samples were fired to 950 °C and 1040 °C and then compared with samples of 100% brick clay. Multiple analytical techniques (X-ray fluorescence, dilatometry, boiling water absorption, volumetric shrinkage, and mercury porosimetry) were used for analysis. Dilatometry shows that the additives influenced the temperature at which shrinkage began and the extent of that shrinkage. The use of colemanite reduced the temperature at which the shrinkage began by 120 °C and nepheline syenite reduced it by 20 °C. A linear shrinkage in dilatometry of 1% (from the maximum expanded length) was achieved at 1000 °C for 100% clay, 875 °C for colemanite additions and 970 °C for nepheline syenite additions. However, for samples fired at 1040 °C for 2 h colemanite containing samples had significantly lower volumetric shrinkage and higher water absorption than 100% clay and nepheline syenite samples, suggesting the presence of higher amounts of open porosity caused by the decomposition of the colemanite on heating. Samples containing nepheline syenite had a lower volumetric shrinkage but also a marginally lower water absorption than the 100% clay. The further optimisation of these or similar additives could potentially provide energy saving opportunities and reductions in CO2 emissions for brick manufacturers.

Influence of the Granite Waste into a Clayey Ceramic Body for Rustic Wall Tiles

2012 ◽  
Vol 727-728 ◽  
pp. 1057-1062 ◽  
Author(s):  
Monica Castoldi Borlini Gadioli ◽  
Mariane Costalonga de Aguiar ◽  
Abiliane de Andrade Pazeto ◽  
Sérgio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Mechanical Strength ◽  
Water Absorption ◽  
Raw Materials ◽  
Rupture Strength ◽  
Ceramic Body ◽  
Linear Shrinkage ◽  
Ceramic Production ◽  
Ornamental Stones ◽  
Error Bar ◽  
Press Molding

This work has as its objective to evaluate the influence of a granite waste into a clayey ceramic body for obtaining of rustic wall tiles. As raw materials, a clayey ceramic body for red ceramic production and a granite waste, resulting from ornamental stones cutting with the multi-wire technology were used. Compositions using 0, 10, 20 and 30% of waste incorporated into ceramic body were prepared. Specimens were fabricated by uniaxial press-molding at 20 MPa and sintered at 1050°C. The following properties were determined: linear shrinkage, water absorption and flexural rupture strength. In general, within the error bar, there was no influence of the waste in the values of water absorption of the clayey ceramic body. The results showed that all investigated formulations used in this work for the production of rustic wall tiles attend the standards for water absorption and mechanical strength.

scholarly journals Effect of kaolinitic clays from the State of Rio de Janeiro in the composition of whiteware floor tile bodies

Cerâmica ◽  
2006 ◽  
Vol 52 (322) ◽  
pp. 138-145 ◽  
Author(s):  
C. M. F. Vieira ◽  
L. A. Peçanha Jr. ◽  
S. N. Monteiro
Keyword(s):  
Rio De Janeiro ◽  
Ceramic Body ◽  
Mercury Porosimetry ◽  
Physical And Mechanical Properties ◽  
Floor Tile ◽  
Linear Shrinkage ◽  
The State ◽  
Ceramic Tiles ◽  
Industrial Processing ◽  
Floor Tiles

This work presents an investigation that was undertaken for three types of kaolinitic clays from the State of Rio de Janeiro, Brazil, with a potential use in whiteware floor tiles bodies. Different compositions prepared by mixing the three clays with other materials such as kaolin, quartz, philite, potash feldspar and talc, were investigated and compared with an industrial ceramic body for whiteware floor tiles (group BIIa). Physical and mechanical properties such as linear shrinkage, water absorption and flexural strength were evaluated in pressed specimens fired at temperatures varying from 1025 to 1225 ºC. The microstructure of the specimens was studied by X-ray diffraction, scanning electron microscopy and mercury porosimetry. The results indicated that the prepared compositions presented microstructural characteristics, specially the pore size distribution, and technological properties that are compatible with low-porosity ceramic tiles. However, they also display characteristics, such as an excessive plasticity and high loss on ignition, that could generate problems during the industrial processing.

Effect of the Incorporation of Marble Waste in the Properties of Clay Ceramic Bricks

2020 ◽  
Vol 1012 ◽  
pp. 250-255
Author(s):  
Wendell Bruno Almeida Bezerra ◽  
Fabio da Costa Garcia Filho ◽  
Artur Camposo Pereira ◽  
Sergio Neves Monteiro ◽  
M.T. Marvila ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Water Absorption ◽  
Building Materials ◽  
Ceramic Body ◽  
Linear Shrinkage ◽  
Mechanical Resistance ◽  
Ornamental Stones ◽  
Marble Waste ◽  
Marble Industry

Residues incorporation into construction building materials is a promising sustainable alternative for the correct disposal of this kind of material. Brazil is one of the largest world producers of ornamental stones. Nevertheless, the disposal of these residues usually is made outside the industry, which contributes to environmental pollution. This work aimed to evaluate the incorporation of residues from the marble industry into ceramic bricks. Specimens of clay ceramic containing 10, 20, 30 and 40 wt.% of marble residue were prepared and fired at 900oC. The evaluation of the ceramic bricks added with marble residue was based on linear shrinkage, water absorption and mechanical resistance. These properties were compared with Brazilian standards. It was concluded that the incorporation of marble residues, with up to 20 wt%, into the ceramic body is technically feasible and positively influences the properties of the material.

Firing Behaviour of a Clayey Ceramic Body for Rustic Floor Tiles

2012 ◽  
Vol 727-728 ◽  
pp. 959-964 ◽  
Author(s):  
Carlos Maurício Fontes Vieira ◽  
Sérgio Neves Monteiro
Keyword(s):  
High Weight ◽  
Ceramic Body ◽  
Mercury Porosimetry ◽  
Linear Shrinkage ◽  
X Ray Diffraction ◽  
Microstructural Characteristics ◽  
Plagioclase Feldspar ◽  
X Ray ◽  
Firing Behavior ◽  
Floor Tiles

This work had as its objective to evaluate the firing behavior and microstructure of a typical clayey ceramic body from Campos dos Goytacazes, Brazil, used to fabricate extruded rustic floor tiles. The firing behavior of samples fired at 650, 850 and 1050°C was studied by thermal analysis (DTA/TG) and their microstructural characteristics were evaluated by mercury porosimetry and X-ray diffraction. Technological properties such as water absorption, linear shrinkage and flexural strength were also evaluated. The results showed that the clayey body presents a relatively high weight loss during firing due to a significant amount of clay mineral associated with aluminum hydroxide decomposition. After firing the clayey body developed an elevated amount of porosity and low mechanical strength. Quartz was detected as the only crystalline phase originated from the unfired body. By contrast, mullite, plagioclase feldspar and hematite appeared during the firing.

scholarly journals The effect of nepheline syenite addition on pyroplastic deformation of sanitarywares

2018 ◽  
Vol 50 (1) ◽  
pp. 85-94
Author(s):  
Tuna Aydın ◽  
Nazım Kunduracı ◽  
Atamer Akbay
Keyword(s):  
Water Absorption ◽  
Nepheline Syenite ◽  
Linear Shrinkage ◽  
Technological Properties ◽  
Microstructural Characteristics ◽  
Lower Temperature ◽  
Increased Strength ◽  
Pyroplastic Deformation

Nepheline syenite is used instead of feldspars as fluxing in ceramics. In this study, three ceramic bodies were prepared. Nepheline syenite was substituted by Na feldspar in the ratio of maximum 30 wt.%. The pyroplastic deformation was evaluated together with technological properties, including linear shrinkage, water absorption and strength. Phase and microstructural characteristics were also investigated. Results showed that the addition of nepheline syenite provided a decrease in viscosity. The decrease in viscosity caused an increase in the tendency for pyroplastic deformation in bodies containing nepheline syenite; however, this result shows that bodies containing nepheline syenite can be sintered at a lower temperature than the standard body. The addition of nepheline syenite also decreased water absorption and increased strength.

Reformulation of a Kaolinitic Clay Ceramic Body with Sand and Flux Clay for Roofing Tiles Production

2012 ◽  
Vol 727-728 ◽  
pp. 965-970 ◽  
Author(s):  
Carlos Maurício Fontes Vieira ◽  
Sérgio Neves Monteiro
Keyword(s):  
Mechanical Strength ◽  
Water Absorption ◽  
Rupture Strength ◽  
Ceramic Body ◽  
Linear Shrinkage ◽  
Flexural Behavior ◽  
Ceramic Product ◽  
Technological Properties ◽  
Kaolinitic Clay ◽  
Press Molding

A ceramic body traditionally used to produce bricks and roofing tiles was reformulated by the addition of sand and illitic clay. The objective was to obtain a ceramic product with better technological properties. Specimens were made by uniaxial press-molding at 20 MPa and then fired at temperatures varying from 850 to 1100°C. The determined technological properties were: linear shrinkage, water absorption and flexural rupture strength. The results showed that both sand and illitic clay contribute to reduce the water absorption of the industrial clayey body. With respect to the flexural behavior, it was observed that the incorporation of sand decreased the mechanical strength. On the other hand, the illitic, incorporated in an amounts of 30 wt.% contributed to increase the mechanical strength of the clayey ceramic.

scholarly journals Are Cross-Border Classes Feasible for Students to Collaborate in the Analysis of Energy Efficiency Strategies for Socioeconomic Development While Keeping CO2 Concentration Controlled?

2021 ◽  
Vol 13 (3) ◽  
pp. 1584
Author(s):  
Roberto Araya ◽  
Pedro Collanqui
Keyword(s):  
Energy Efficiency ◽  
Socioeconomic Development ◽  
Concept Maps ◽  
Research Question ◽  
Co2 Concentration ◽  
Asia Pacific ◽  
School Students ◽  
Improve Energy Efficiency ◽  
Cross Border ◽  
Science Classes

Education is critical for improving energy efficiency and reducing CO2 concentration, but collaboration between countries is also critical. It is a global problem in which we cannot isolate ourselves. Our students must learn to collaborate in seeking solutions together with others from other countries. Thus, the research question of this study is whether interactive cross-border science classes with energy experiments are feasible and can increase awareness of energy efficiency among middle school students. We designed and tested an interactive cross-border class between Chilean and Peruvian eighth-grade classes. The classes were synchronously connected and all students did experiments and answered open-ended questions on an online platform. Some of the questions were designed to check conceptual understanding whereas others asked for suggestions of how to develop their economies while keeping CO2 air concentration at acceptable levels. In real time, the teacher reviewed the students’ written answers and the concept maps that were automatically generated based on their responses. Students peer-reviewed their classmates’ suggestions. This is part of an Asia-Pacific Economic Cooperation (APEC) Science Technology Engineering Mathematics (STEM) education project on energy efficiency using APEC databases. We found high levels of student engagement, where students discussed not only the cross-cutting nature of energy, but also its relation to socioeconomic development and CO2 emissions, and the need to work together to improve energy efficiency. In conclusion, interactive cross-border science classes are a feasible educational alternative, with potential as a scalable public policy strategy for improving awareness of energy efficiency among the population.

scholarly journals Dimensionless Analysis on the Characteristics of Pneumatic Booster Valve with Energy Recovery

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Fan Yang ◽  
Kotaro Tadano ◽  
Gangyan Li ◽  
Toshiharu Kagawa
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Energy Recovery ◽  
Operational Parameters ◽  
Local Pressure ◽  
Air Power ◽  
Improve Energy Efficiency ◽  
Dimensionless Analysis ◽  
Air Supply ◽  
Save Energy

Factories are increasingly reducing their air supply pressures in order to save energy. Hence, there is a growing demand for pneumatic booster valves to overcome the local pressure deficits in modern pneumatic systems. To further improve energy efficiency, a new type of booster valve with energy recovery (BVER) is proposed. The BVER principle is presented in detail, and a dimensionless mathematical model is established based on flow rate, gas state, and energy conservation. The mathematics model was transformed into a dimensionless model by accurately selecting the reference values. Subsequently the dimensionless characteristics of BVER were found. BVER energy efficiency is calculated based on air power. The boost ratio is found to be mainly affected by the operational parameters. Among the structural ones, the recovery/boost chamber area ratio and the sonic conductance of the chambers are the most influential. The boost ratio improves by 15%–25% compared to that of a booster valve without an energy recovery chamber. The efficiency increases by 5%–10% depending on the supply pressure. A mathematical model is validated by experiment, and this research provides a reference for booster valve optimisation and energy saving.

Sign in / Sign up

Export Citation Format

Share Document