Influence of Material Properties of Input Raw Materials on Microstructure of Aerated Concrete

2014 ◽  
Vol 1000 ◽  
pp. 73-76
Author(s):  
Ester Helanová ◽  
Radek Janovský ◽  
Rostislav Drochytka
Keyword(s):  
Chemical Composition ◽  
Material Properties ◽  
Current Knowledge ◽  
Raw Materials ◽  
High Quality ◽  
Whole Process ◽  
Considerable Impact ◽  
Aerated Concrete ◽  
Selection Of ◽  
Mineralogical Phases

One of the basic conditions of production of high quality products from aerated concrete is selection of appropriate input raw materials. Their material properties have crucial influence on the whole process of production of the products from aerated concrete - from behavior of fresh mix of aerated concrete through setting to development of mineralogical phases during autoclaving. Properties of input materials, in particular their chemical composition has considerable impact on the final properties of the product made from aerated concrete. This paper summarizes current knowledge from the research of microstructure of fly ash aerated concrete depending on chemical composition of the raw materials in the mix.

BÖHLER W403 VMR

Alloy Digest ◽  
2013 ◽  
Vol 62 (9) ◽  
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Physical Properties ◽  
Tool Steel ◽  
Raw Materials ◽  
Heat Treating ◽  
Diffusion Annealing ◽  
Selection Of

Abstract Böhler (or Boehler) W403 VMR is a tool steel with outstanding properties, based not only on a modified chemical composition, but on the selection of highly clean raw materials for melting, remelting under vacuum (VMF), optimized diffusion annealing, and a special heat treatment. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-721. Producer or source: Böhler Edelstahl GmbH.

Influence of Gypsum Additive on the Formation of Tobermorite in Autoclaved Aerated Concrete

2016 ◽  
Vol 714 ◽  
pp. 116-121 ◽  
Author(s):  
Ester Helanova ◽  
Rostislav Drochytka ◽  
Vit Cerný
Keyword(s):  
Chemical Composition ◽  
Hydrothermal Reaction ◽  
Raw Materials ◽  
Fly Ashes ◽  
Sem Images ◽  
X Ray ◽  
Autoclaved Aerated Concrete ◽  
Variable Chemical ◽  
Aerated Concrete

The quality of the aerated concrete strongly depends on the chemical composition of the raw materials, as well as the process of the hydrothermal reaction during autoclaving. Due to the variable chemical composition of fly ashes, it is necessary to identify the effect of each ion on the formation of the microstructure of aerated concrete. This paper examines the process of formation of tobermorite with the addition of sulphates in various percentage representation. The microstructure of aerated concrete is assessed using SEM images and the mineralogical by means of X-ray analysis.

scholarly journals THE QUALITY ANALYSIS OF CHOCOLATE CONFECTIONERY PRODUCTS IN RESTAURANT BUSINESS

2018 ◽  
Vol 64 ◽  
Author(s):  
N.V. Bespalova ◽  
M.M. Gomola ◽  
T.I. Yakovleva
Keyword(s):  
Quality Control ◽  
Raw Materials ◽  
Quality Analysis ◽  
High Quality ◽  
Confectionery Products ◽  
Practical Recommendations ◽  
Selection Of

The article is devoted to the urgent theoretical and practical problems of the quality control of the chocolate confectionery products in cafes and restaurants. The authors analyze the modern approaches to the quality control of the chocolate confectionery products. The practical recommendations can be useful for the process of selection of the high quality raw materials. The criteria for the quality control of the chocolate confectionery products have been given. Some ways to improve the quality of he chocolate confectionery products have been discussed.

scholarly journals Heat Processing and Change of Proper Indicators of Basalts

Land Science ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. p1
Author(s):  
Rashidova R K ◽  
Kurbanov Abdirakhim Ahmedovich ◽  
Aliyev T ◽  
Jiyanov A B ◽  
Turdieva O J ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Raw Materials ◽  
Practical Interest ◽  
Heat Processing ◽  
High Quality ◽  
Mineral Raw Materials ◽  
Different Color ◽  
Basalt Rock

This paper presents the results of the analysis of the quality of basalts, their heat treatment and studies of changes in the chemical composition of basalts, which leads to a change in the external color of partially processed basalt raw materials (hereinafter referred to as semi-finished product). The results of a study of purified basalt from slime, impurities and hydroxides, changes in the chemical composition of basalt rock are presented. The prospects of heat treatment of a semi-finished product and obtaining multi-colored products from mineral raw materials is shown. It was found that the optimal firing temperature of the semi-finished product, the possible options for changing the external color and the criterion points of the thermal effect at which the basalt semi-finished product changes the external shade. These statements are of great scientific and practical interest in the fact that during the heat treatment of a semifinished product, basalt easily overheats and gradually acquires a different color, which occurs to a liquids temperature and allows the future to plan to obtain high-quality multi-colored products from basalts, for example, products for design.

scholarly journals Provenance and production technology of late medieval ‘Besztercebánya/Banská Bystrica–type’ high-quality stove tiles

2020 ◽  
Vol 12 (12) ◽  
Author(s):  
Dorottya Györkös ◽  
Bernadett Bajnóczi ◽  
György Szakmány ◽  
Máté Szabó ◽  
Ralf Milke ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Raw Materials ◽  
Ceramic Body ◽  
Analytical Investigation ◽  
X Ray Diffraction ◽  
High Quality ◽  
Late Medieval ◽  
Production Techniques ◽  
Phase And Chemical Composition ◽  
Primary Groups

AbstractA unique collection of high-quality late medieval (fifteenth–sixteenth century) glazed and unglazed stove tiles from the northern part of the Carpathian Basin is of great interest to archaeologists and art historians. It is yet to be determined if these products, which are characterised by similar features, were produced in a single workshop, perhaps in Besztercebánya/Banská Bystrica (in present-day Slovakia), or in several workshops throughout the region. The first systematic multi-analytical investigation was carried out on the ceramic body and glaze of one hundred and seventeen tile fragments from six sites (Besztercebánya/Banská Bystrica, Fülek/Fiľakovo, and Csábrág/Čabraď in Slovakia; Salgó, Eger, and Szécsény in Hungary) using polarising microscopy, X-ray diffraction, electron microprobe, and Raman microspectroscopy analyses to determine the raw materials and production techniques used. Based on the petrographic characteristics, phase and chemical composition of the ceramic body, and the chemical composition and colourants of the glazes, the stove tiles can be classified into three primary groups. Tiles from different sites are different to each other, only the tiles from the Hungarian sites and from Fülek/Fiľakovo are similar. Thus, it is probable that the tiles were produced in several (at least three) workshops in the region from where they were then dispersed. The technological knowledge of the master(s) producing the polychrome Csábrág/Čabraď tiles with tin-opacified glazes was higher than that of the master(s) producing the other tiles. However, the exact location of the workshops as well as their existence through time is still in unknown.

Usefulness of Quartzites for the Production of Ferrosilicon

2015 ◽  
Vol 226 ◽  
pp. 111-114
Author(s):  
Grzegorz Kopeć ◽  
Roman Przeliorz
Keyword(s):  
Silicon Carbide ◽  
Chemical Composition ◽  
Specific Heat ◽  
Raw Materials ◽  
Raw Material ◽  
Basic Criterion ◽  
Thermogravimetric Studies ◽  
Silica Reduction ◽  
Technical And Economic Indicators ◽  
Selection Of

The selection of quartzites most suitable for the production of ferrosilicon is realized by way of time-consuming industrial trials or laboratorial studies of, among others, the ability of the silica contained in quartzite to form silicon carbide with a selected reducer. Under industrial conditions, the basic criterion for the evaluation of the suitability of a raw material for the production of ferrosilicon are the technical and economic indicators of the process. Under laboratorial conditions, simple and reliable research methods are searched for, which would allow to determine the usefulness of quartzite in the process of carbon silica reduction. The article discusses comparative thermogravimetric studies as well as alternative investigations of the specific heat of three selected quartzites which fulfill the chemical composition criterion, used in the mixed charge as raw materials for ferrosilicon FeSi75 smelting.

scholarly journals The improvement of raw materials of locally produced sparkling wines

2020 ◽  
pp. 355-361
Author(s):  
Александр Семёнович Макаров
Keyword(s):  
Raw Materials ◽  
Climatic Conditions ◽  
Sparkling Wine ◽  
High Quality ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Technological Potential ◽  
Literary Sources ◽  
Grape Varieties ◽  
Selection Of

Систематизированы современные литературные данные о совершенствовании сырьевых ресурсов для производства игристых вин. Даны рекомендации о перспективности использования различных сортов винограда в производстве игристых вин: интродуцированных (Мальбек, Сира и др.), селекционных (Рислинг Магарача, Рислинг мускатный, Рислинг красный, Алиготе мускатное, Цитронный Магарача и др.), аборигенных (Кокур белый, Кокур белый 46-10-3, Сых дане, Сары пандас, Кефесия и др.). Выделены факторы, влияющие на основные и дополнительные показатели в системе «виноград-виноматериал-игристое вино», среди которых важными являются степень зрелости винограда, его технологический потенциал, почвенно-климатические условия произрастания винограда. Сделан вывод, что всесторонний подход к подбору сырья с учетом факторов, влияющих на его основные и дополнительные показатели, позволит сформировать сырьевые зоны для производства игристых вин высокого качества. Modern literary sources on the improvement of raw materials for production of sparklings were systematized. Recommendations on the prospects of using various grape varieties in production of sparkling wines are given. They include introduced (‘Malbec’, ‘Syrah’, etc.), selection (‘Riesling Magaracha’, ‘Riesling Muscatny’, ‘Riesling Krasny’, ‘Aligote Muscatnoye’, ‘Tsitronnyi Magaracha’, etc.) and native (‘Kokur Belyi’, ‘Kokur Belyi 46-10-3’, ‘Sykh Dane’, ‘Sary Pandas’, ‘Kefesiya’, etc.) grape varieties. Factors influencing the main and additional indicators in the system "grapes - base wine - sparkling wine" are highlighted. The most important factors are the degree of grape ripeness, its technological potential, soil and climatic conditions of grape growing. It is concluded that a comprehensive approach to the selection of raw materials, taking into account the factors affecting its main and additional indicators, will allow the formation of zones of raw materials for the production of high quality sparkling wines.

scholarly journals EVALUATION OF MUDSTONE FORMATIΟNS AND THEIR SUITABILITY FOR CERAMICS PRODUCTION

2004 ◽  
Vol 36 (1) ◽  
pp. 19
Author(s):  
Α. Καστρίνάκη ◽  
Α. Τσιραμπίδης ◽  
Κ. Μιχαηλίδης ◽  
Γ. Τρώντσιος
Keyword(s):  
Chemical Composition ◽  
Clay Minerals ◽  
Ceramic Industry ◽  
Raw Materials ◽  
High Quality

Mudstone formations samples from the Thessaloniki and Chalkidiki prefectures are investigated, in respect to their suitability as raw materials for the ceramic industry. In particular, the investigation concerned the determination of the mineralogical and chemical composition of the studied sample. Quartz and feldspars are the major mineralogical constituents, whereas micas, clay minerals and carbonates were detected in various amounts, follow. The samples are evaluated, concerning their suitability for ceramics production, namely majiolica, cottoforte, gre and bricks, on the basis of their chemical composition and in accordance to Si02-Al203-Fe203t, Si02 (Fe203t+K20+Na20+CaO+MgO)-(AI203+Ti02) and Fe203t-(CaO+MgO)-(K20+Na20) triangular diagrams. The general conclusion is that, most of the studied materials are unsuitable for high quality ceramics products. By contrast, some of them could be tested for the production of bricks and roofing tiles.

scholarly journals Chemical composition and medicinal potential of Oroxylumindicum:A Review

2021 ◽  
Vol 16 (3) ◽  
Author(s):  
Sarvesh Kumar ◽  
Renu Chaudhary ◽  
Prashant Arya ◽  
Sanjeev Kumar ◽  
Payal Verma ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Physiological Function ◽  
Raw Materials ◽  
Stem Bark ◽  
Root Bark ◽  
Oroxylin A ◽  
High Quality ◽  
Physiological Maturity ◽  
Current Scenario ◽  
Design And Manufacture

Oroxylumindicum is a night bloomer and is pollinated naturally by bats. O. indicum, is used as one of the important ingredients in most commonly used Ayurvedic preparation, named as “Dasamula”. Stem bark has anti-rheumatic properties. Bark powder infusion are diaphoretic. The Tender fruits are spasmodic carminative, and stomachic while the seeds are purgative. Root bark of sonapatha is an astringent, tonic, anti-diarrhoeal, diuretic, anodyne, and is used to cure dropsy. The Flavonoids Chrysin, oroxylin-A, Scutella in and baicalein have been found in the stem bark and leaves of this plant. This plant’s seed are said to carry ellagic acid. In the current scenario, the investigation’s scope is critical for commercializing this plant and knowing the physiological function of bioactive chemicals during the development of diverse organs. It may allow for the standardization of physiological maturity, which is necessary for getting high-quality raw materials for the design and manufacture of health-beneficial medications.

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