scholarly journals Investigation of the Physical, Mechanical and Aesthetic Characteristics of Terrazo Tiles Obtained from Different Rock Aggregates

2020 ◽  
Vol 3 (1) ◽  
pp. 477-490
Author(s):  
Canberk Çoşkun ◽  
Tamer Rızaoğlu
Keyword(s):  
Industrial Revolution ◽  
Bending Strength ◽  
Raw Materials ◽  
Mechanical Test ◽  
Raw Material ◽  
Natural Stone ◽  
Tile Production ◽  
Coating Materials ◽  
Material Source ◽  
Aesthetic Appearance

AbstractThroughout history, people have covered the floors of the buildings with materials such as carpet, rock pieces, wood, mosaic, ceramic and tile according to the conditions of the day due to their desire to protect them from moisture, make them hygienic environment easy to clean and give an aesthetic appearance. The merging of mechanization with cement based materials with the industrial revolution in the 19th century has brought along the development of diversity and different production methods in these floor covering materials. One of these coating materials is terrazo tiles that form the subject of the current paper. Terrazo tiles are materials obtained by pressing the mortar obtained by mixing water, cement, marble powder and aggregate in certain proportions. Within the scope of this research, it was aimed to provide alternative raw materials to the tile body and to transform the rock pieces, which are found in waste form in natural stone workshops, into the economy. For this purpose, geomaterials collected from magmatic, metamorphic and sedimentary rocks cropped in the Kahramanmaraş-Antakya-Elazığ regions and natural stone workshops operating in Kahramanmaraş city, were classified according to their geological origins and aggregates of 4.75-12 mm were obtained with the help of jaw crushers and sieves. Tiles have been produced in accordance with the method of tile production from sized aggregates. The produced tiles were kept in the water pool for 28 days and surface controls were made. According to the physical and mechanical test results applied to the tile samples, water absorption by weight is 5.31-13.25%, bending strength 4.95-8.89 MPa, Böhme abrasion resistance 1.09-3.43 cm3/50cm2, mass loss after freeze-thaw is observed to be in the range of 0.97-1.59%. On the other hand, the surface roughness of the tiles prepared with coarse rock aggregates was found to be relatively lower than the tile samples obtained with fine grained rock aggregates. The obtained results indicate that the geomaterials subject to the research can be used as an alternative raw material source in tile production and these raw materials will provide new benefits to the construction field.

Preparation and Properties of MgAl2O4-CaAl12O19 High Temperature Composite

2012 ◽  
Vol 512-515 ◽  
pp. 617-620
Author(s):  
Yong Hong Wang ◽  
Yan Gai Liu ◽  
Tao Yang ◽  
Zhao Hui Huang ◽  
Ming Hao Fang
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Reaction Temperature ◽  
Bending Strength ◽  
Raw Materials ◽  
Weight Ratio ◽  
Raw Material ◽  
Reaction Conditions ◽  
Optimum Reaction ◽  
Industrial Alumina

The utilization of lightweight refractories plays an important role in reducing the energy consumption of industrial furnaces. In this paper, MgAl2O4-CaA112O19 high temperature composite was synthesized via solid state reaction using magnesite, dolomite and industrial alumina as raw materials. The influences of raw materials and reaction temperature on phase compositions and microstructure of the composite were investigated by XRD and SEM，respectively. The parameters to prepare MgAl2O4-CaA112O19 high temperature composite were optimized. The results show that the optimum reaction conditions for synthesizing MgAl2O4-CaA112O19 composite is the CA6/MA weight ratio of 2:3, and the reaction temperature of 1500°C for 4h. The CaA112O19 crystals showed laminated or plate-like structure, and the MgAl2O4 showed spherical morphology. The reaction temperature had little effect on the phase compositions of MA-CA6 composite in this experiment. The content of Al2O3 in the raw material affected the phase composition of MA-CA6 composite.With the increase of the CaA112O19 amount, the bending strength of the composite decreased.

scholarly journals Technology of Dvaravati Pottery: A View from Petrographic Analysis.

2012 ◽  
Vol 31 ◽  
pp. 4 ◽  
Author(s):  
Duangkamol Aussavamas
Keyword(s):  
Raw Materials ◽  
Distribution Patterns ◽  
Raw Material ◽  
Archaeological Sites ◽  
Petrographic Analysis ◽  
Material Distribution ◽  
Material Source ◽  
Period Analysis ◽  
Production Techniques ◽  
Central Thailand

This study focuses on the examination of aspects of the carinated pottery of the Dvaravati period. This type of pottery is one of the most prominent types found in a large number of Dvaravati sites in Thailand. Samples used for this study were collected from excavations at archaeological sites located in several regions of Thailand including Northern, Northeastern and Central Thailand. The carinated potteries were analyzed using petrographic analysis. The objective of this work was to examine the pottery fabric. This method is used to establish sources of raw materials, and whether production techniques, decorations, and firing temperature show patterns associated with the raw material source distributions. It is also possible to reconstruct the production technology of the vessels. Knowing the source of raw materials (source of clay and temper) and understanding the patterns of manufacturing and decorative processes help better understand material distribution patterns of the Dvaravati period. Analysis shows that Dvaravati earthenware pottery raw materials include both primary and secondary clays, and that temper used was both organic matter (rice chaff) and grogs (fired clay mixed with iron oxide). Evidence for wheel-thrown production was associated with all decoration styles, and finishing techniques included plain, polishing, incising, cord marking, red slip and black burnishing. The firing temperatures were as low as 400-550° C. These samples indicate there was general homogeneity over a wide area, but also the presence of regional groups of pottery. This suggests the widespread circulation of pottery styles among various production centers during the Dvaravati period.

Characterization and Properties of Lampang Kaolinite Clay for Standard Clay

2019 ◽  
Vol 798 ◽  
pp. 248-253
Author(s):  
Soravich Mulinta ◽  
Sakdiphon Thiansem
Keyword(s):  
Water Absorption ◽  
Bending Strength ◽  
Silicon Oxide ◽  
Raw Materials ◽  
Raw Material ◽  
Chemical Components ◽  
Kaolin Clay ◽  
Kaolinite Clay ◽  
X Ray ◽  
Materials Used

The aim of this study was to study and characterize the properties of raw material for standard clay, Lampang province. The raw materials used in the study are from local sources. They are Lampang kaolin clay (WC-1) and Lampang kaolin residual (WC-2). The characterization of raw material was analyzed by particle analyzer, X-ray fluorescence (XRF) and X-ray diffraction (XRD). The mixing ratio of standard clay as an addition Lampang kaolin clay 50-90% and Lampang kaolin residual 10-50% on physical-mechanical properties of standard clay. The properties of standard clay after firing at temperature at 1200°C were studied. The shrinkage, water absorption and bending strength of standard clay were tested. The results showed that the chemical components of 60%lampang kaolinite clay and 40% Lampang kaolin residual included of large amount of 67.47wt% Silicon oxide and 20.92wt%Aluminum oxide. The physical properties of standard clay had a shrinkage of 11.2%, water absorption of 1.9 % and bending strength of 659 kg/cm2. The standard clay produced fulfilled the requirements of Thai industrial standard (TIS 485-2542).

scholarly journals Critical raw materials as a part of sustainable development

2021 ◽  
Vol 11 (5) ◽  
pp. 12-23
Author(s):  
Michal Cehlár ◽  
Zuzana Šimková
Keyword(s):  
European Union ◽  
Sustainable Development ◽  
Industrial Revolution ◽  
Raw Materials ◽  
Raw Material ◽  
The European Union ◽  
European Area ◽  
Material Sources ◽  
Committee Of The Regions ◽  
Critical Raw Materials

The presented article deals with the issue of critical raw materials in the European Union with an emphasis on sustainable development and also barite, as an only one critical raw material mined in Slovakia. The article points out in detail the deposits of individual critical raw materials within the European Union. They clearly profile the European area´s dependence on imports of critical raw materials in accordance with the Communication from the Commission to the Council, the European Economic and Social Committee and the Committee of the Regions on the European Union's list of critical raw materials. Based on a defined Herfindahl-Hirschman index, which is clearly methodologically described, the article also points to the exploitation of critical raw materials in the European Union, what is in consideration of sustainable development crucial because some inventions are fundamentally dependent on them, as is their production on world markets. This article deals with critical raw materials in the EU, because it is in this area that we would like to experience the 4th industrial revolution, which is characterized by "new products" with a short life cycle, products with the least possible impact on the environment, i.e. innovations that are often impossible without important raw materials. Is it at all possible to talk about sustainable development with such raw material sources in European Union?

scholarly journals The prerequisites for the emergence of industrial revolutions

2021 ◽  
Vol 2021 (54) ◽  
pp. 264-290
Author(s):  
Oksana Kushnirenko ◽  
◽  
Keyword(s):  
Economic Development ◽  
Industrial Revolution ◽  
System Analysis ◽  
Raw Materials ◽  
Historical Analysis ◽  
Scientific Work ◽  
Raw Material ◽  
Economic Relations ◽  
Successive Generations ◽  
Industrial Revolutions

Global technological challenges facing humanity have increased the importance of understanding the prerequisites for the emergence of industrial revolutions. The purpose of the article is the development and improvement of scientific and theoretical basics of industrial revolutions origins and consideration for their impact on the economic development for a comprehensive understanding of modern industrial and innovation transformations. In order to achieve the objective, the system analysis, induction and deduction methods are used to describe the evolution of economic thinking towards a theoretical and methodological framework; historical, logical and dialectical methods for revealing the relationship between the system of socio-economic relations and technological methods of production; and methods of summarization and classification to determine the patterns of development of industrial revolutions and the drivers that cause it. Based on the systematization of the scientific work of foreign and domestic scientists to study the prerequisites of technological transformations under the influence of industrial revolutions, the article provides a historical analysis of their occurrence. This made it possible to identify the prerequisites for the emergence of industrial revolutions and reveal the main factors that determine the transformation of production methods. In particular, this is a combination of factors: the accumulation of knowledge and the seeking for new methods of processing raw materials at lower costs; concentration of capital; the availability of resources (human, raw-material, and financial ones), and the formation of a unified information space and an innovative institutional system. In this process, emphasis should be laid on creation of an enabling environment in which the transformation of society towards a next industrial revolution can take place. This is accomplished by a certain mechanism of technological transformations, including a set of factors, processes, stages (phases) and resources for their implementation. The following key characteristics of the industrial revolutions are identified: the reduction in the time periods between them; changing role and place of the human; and strengthening the creative and innovative activities of employees. The examination revealed that industrial revolution is not an incidental phenomenon in the development of human civilization, but a natural process conditioned by internal and external factors, and regularities of socio-economic cyclical dynamics. The emergence of the next industrial revolution is accompanied by a change in the technological order, manifested in the alternation of successive generations of devices and technologies as the material basis of human civilization. Deepening scientific approaches to substantiating the conceptual foundations of the emergence of industrial revolutions is the basis for assessing the possibilities and consequences of their impact on socio-economic development, which can facilitate adaptation to technological challenges.

scholarly journals Evaluation of Kalalani vermiculite for production of high strength porcelain insulators

2019 ◽  
Vol 51 (2) ◽  
pp. 223-232 ◽  
Author(s):  
Blasius Ngayakamo ◽  
Eugene Park
Keyword(s):  
Water Absorption ◽  
Bulk Density ◽  
Bending Strength ◽  
Raw Materials ◽  
High Strength ◽  
Microstructural Characterization ◽  
Dielectric Strength ◽  
Raw Material ◽  
Porcelain Insulators

The present work has evaluated Kalalani vermiculite as a potential raw material for the production of high strength porcelain insulators. Three porcelain compositions were prepared to contain 0, 20 and 30 wt% of Kalalani vermiculite. Porcelain samples were fabricated using a semi-drying method. The chemical, mineralogical phases and microstructural characterization of the raw materials were carried out using XRF, XRD, and SEM techniques, respectively. Water absorption, bulk density, dielectric and bending strengths were performed on porcelain samples fired up to 1300?C. However, at the sintering temperature of 1250?C, the porcelain sample with 20 wt% of Kalalani vermiculite gave the dielectric strength of 61.3 kV/mm, bending strength of 30.54 MPa, bulk density of 2.21 g/cm3 and low water absorption value of 0.21 % which is the prerequisite properties for high strength porcelain insulators. It was therefore concluded that Kalalani vermiculite has the potential to be used for the production of high strength porcelain insulators

Preparation and Mechanism of Cordierite by Using Calcined Bauxite as Raw Material at Relatively Low Temperature

2013 ◽  
Vol 785-786 ◽  
pp. 1066-1071
Author(s):  
Jian Feng Wu ◽  
Bin Zheng Fang ◽  
Xiao Hong Xu ◽  
Xin Bin Lao
Keyword(s):  
Low Temperature ◽  
Bulk Density ◽  
Bending Strength ◽  
Raw Materials ◽  
Xrd Analysis ◽  
Raw Material ◽  
Synthetic Process ◽  
Synthetic Temperature ◽  
Sintering Method

The cordierite was synthesized at relatively low temperature by pressureless sintering method, using calcined bauxite, talcum , quartz and feldspar as raw materials in this paper. The water absorption (Wa), porosity (Pa), bulk density (Db) and bending strength of samples have been tested, and the synthetic process and mechanism have been investigated by XRD, SEM, and so on. The results showed that the cordierite could be synthesized at 1280°C and the range of synthetic temperature is 1160~1300°C, when the sample was sintered at 1280°C for 2h, its bulk density and bending strength were 2.20g/cm3and 72.13MPa, respectively. XRD analysis showed that the main phase of sample was cordierite, the cordierite content was about 88wt%, and the minor phases were MgAl2O4spinel and corundum. SEM results showed that the samples were dense and the pore sizes were 5 μm~100μm, the grains were growth and development well, the grains size were 0.5μm~6μm. High reaction activity corundum and mullite were provided by calcined bauxite, then coupled with the role of feldspar, thus reduced the synthetic temperature of cordierite.

scholarly journals Glycerol Assisted Pretreatment of Lignocellulose Wheat Straw Materials as a Promising Approach for Fabrication of Sustainable Fibrous Filler for Biocomposites

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 388
Author(s):  
Hamayoun Mahmood ◽  
Saqib Mehmood ◽  
Ahmad Shakeel ◽  
Tanveer Iqbal ◽  
Mohsin Ali Kazmi ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Wheat Straw ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Hot Water ◽  
Raw Material ◽  
Dilute Acid ◽  
Material Source ◽  
Thermal Stability Of ◽  
Composite Samples

Glycerol pretreatment is a promising method for the environmentally-friendly transformation of lignocellulosic materials into sustainable cellulose-rich raw materials (i.e., biopolymer) to fabricate biocomposites. Here, a comparison of aqueous acidified glycerol (AAG) pretreatment of wheat straw (WS) with alkaline, hot water, and dilute acid pretreatments on the thermal and mechanical characteristics of their fabricated composite board is presented. A comparison of total energy expenditure during WS pretreatment with AAG and other solutions was estimated and a comparative influence of AAG processing on lignocellulosic constituents and thermal stability of WS fiber was studied. Results imply that AAG pretreatment was superior in generating cellulose-rich fiber (CRF) as compared to other pretreatments and enhanced the cellulose contents by 90% compared to raw WS fiber. Flexural strength of acidic (40.50 MPa) and hot water treated WS composite (38.71 MPa) was higher compared to the value of 33.57 MPa for untreated composite, but AAG-treated composites exhibited lower values of flexural strength (22.22 MPa) compared to untreated composite samples. Conversely, AAG pretreatment consumed about 56% lesser energy for each kg of WS processed as compared to other pretreatments. These findings recognize that glycerol pretreatment could be a clean and new pretreatment strategy to convert agricultural waste into high-quality CRF as a sustainable raw material source for engineered biocomposite panels.

English Occupations, 1670–1811

1980 ◽  
Vol 40 (4) ◽  
pp. 685-712 ◽  
Author(s):  
Peter H. Lindert
Keyword(s):  
Industrial Revolution ◽  
Raw Materials ◽  
Historical Research ◽  
Raw Material ◽  
Diminishing Returns ◽  
The Law ◽  
Marginal Returns ◽  
Material Scarcity

There are times when researchers must struggle through the weeds and pass up the easier roads chosen by Crane's wayfarer. Such a time has come for research on the growth and structure of the English economy before and during the Industrial Revolution. Our rational preference for the easier roads has caused us to apply increasing amounts of our abundant analytical cleverness to an endowment of empirical raw materials that has grown relatively slowly. But the Law of Diminishing Returns applies to historical research as well as to other activities, and the relatively generous inputs of analysis have lowered their marginal returns and created a condition of raw material scarcity. The returns to hacking through the archival weeds for new raw materials now seem high.

scholarly journals Analisa Pengaruh Variasi Komposisi Bahan Limbah dari Serat Kelapa Muda, Batang Pisang dan Kertas Bekas terhadap Kekuatan Bending Sebagai Papan Komposit

2017 ◽  
Vol 1 (2) ◽  
pp. 38
Author(s):  
Enda Apriani
Keyword(s):  
Bending Strength ◽  
Raw Materials ◽  
Testing Machine ◽  
Base Material ◽  
Material Composition ◽  
Raw Material ◽  
Waste Paper ◽  
Coconut Fiber ◽  
Composite Board ◽  
Banana Stem

<p>The composite is a combination of two or more materials to produce a new material with unique properties compared to the nature of the base material prior to mixing and surface bonding occurs between each constituent material. The purpose of this research is to know the influence of waste material composition from plant fiber, that is young coconut fiber, banana stem, and calendar waste paper to bending strength on composite board by using Epoxy resin wood type. The process of printing the composite board is done in the Laboratory of Integrated Mechanical Engineering University Proklamasi 45 Yogyakarta. The three raw materials that have been crushed and dried, mixed with the breaking time of each 5" and 10" with their respective ingredients composition, namely Young Coconut Fiber: Banana Stem Fiber: Calendar Waste Paper =25:25:50; 25:50:25; 50:25:25 (%). Each treatment was repeated 3 times. Observation was done by calculating raw material composition and time of destruction process against bending strength of composite board which resulted very significant effect on water content, fracture, and flexibility of composite board. Bending strength testing is performed using a robust Universal Testing Machine (UTM). The result of this research produced the most optimum material composition of bending strength into composite board, ie composition III with the duration of destruction for 5", that is the average MoE value of 17.069,76 kg/cm² and the average value of MoR is 83,78 kg/cm². From this research is expected to get new engineering technique from agriculture waste become composite board with economic value.</p>

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