scholarly journals THE POSSIBILITIES OF USING LOESS CLAY OF KATTABOG DEPOSIT IN THE PRODUCTION OF CERAMIC PRODUCTS

2020 ◽  
pp. 27-30
Keyword(s):  
Mineralogical Composition ◽  
Physicochemical Analysis ◽  
Raw Material ◽  
Electron Microscopic ◽  
X Ray ◽  
Research Results ◽  
Methods Of Analysis ◽  
Modern Methods ◽  
Technical Properties

The aim of the research was to determine the properties of loess clay in Kattabog deposit (Uzbekistan) to identify possible areas of use. Modern methods of physicochemical analysis are used: spectroscopic, x-ray phase, electron microscopic methods of analysis. The research results showed that the main phases of clay are hydromica, quartz, kaolinite, calcite and orthoclase. Based on the research, it can be stated that the clay of Kattabog deposit has good physical and technical properties and mineralogical composition, which is a valuable raw material for the production of various ceramics, bricks, tiles, majolica and other products.

scholarly journals Geochemistry and Mineralogy of Ice-Dammed Lake Sediments of the Lębork Deposit

2021 ◽  
Author(s):  
Radosław Rogoziński ◽  
Alina Maciejewska
Keyword(s):  
Chemical Composition ◽  
Lake Sediments ◽  
Inductively Coupled Plasma ◽  
Mineralogical Composition ◽  
Raw Material ◽  
Element Analysis ◽  
X Ray ◽  
Dominant Component ◽  
Clay Deposits ◽  
Dammed Lake

AbstractVarved clay deposits from ice-dammed lakes are a particularly important and broadly applied raw material used for the production of high-quality ceramics (red bricks, roof tiles, etc.), but the mineralogy and geochemistry of these sediments are not fully understood. The aim of the present study was to determine the chemical and mineralogical composition of ice-dammed lake sediments of the Lębork deposit. Major-element analysis of the compositions of selected samples from the ice-dammed lake clays was performed by X-ray fluorescence (XRF) and trace elements were determined by inductively coupled plasma-mass spectrometry. The mineralogical composition of clay samples was determined by X-ray diffraction (XRD). Analyses of the chemical composition of the ice-dammed lake clays of the Lębork deposit showed that the dominant component was SiO2 with a mean content of 56.13 wt.%; the second most abundant component was Al2O3, with a mean content for the entire deposit of 11.61 wt.%. Analysis by ICP-MS indicated the presence of rare earth elements (REE), e.g. cerium, neodymium, lanthanum, and praseodymium; their mean contents are: 56.9, 27.0, 26.3, and 7.3 ppm, respectively. Mineralogical analysis of the varved clays identified quartz, muscovite, calcite, and clay minerals – illite, kaolinite, and montmorillonite. The material filling the Lębork basin is characterized by small lateral and vertical variability in chemical composition. The results of the present study may be of considerable importance in determining the parent igneous, metamorphic, and sedimentary rocks, the weathering products of which supplied material to the ice-dammed lake, as well as in determining the mechanisms and character of the sedimentation process itself.

Sedimentary Clays as Geopolymer Precursor

2018 ◽  
Vol 39 ◽  
pp. 97-111
Author(s):  
F. Mostefa ◽  
Nasr Eddine Bouhamou ◽  
H.A. Mesbah ◽  
Salima Aggoun ◽  
D. Mekhatria
Keyword(s):  
Sodium Hydroxide ◽  
Mineralogical Composition ◽  
Cementitious Materials ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Calcination Time ◽  
Calorimetric Analysis ◽  
X Ray ◽  
Before And After ◽  
Mechanical Performances

This work aims to study the feasibility of making a geopolymer cement based on dredged sediments, from the Fergoug dam (Algeria) and to evaluate their construction potential particularly interesting in the field of special cementitious materials. These sediments due to their mineralogical composition as aluminosilicates; are materials that can be used after heat treatment. Sedimentary clays were characterized before and after calcination by X-ray diffraction, ATG / ATD, spectroscopy (FTIR) and XRF analysis. The calcination was carried out on the raw material sieved at 80 μm for a temperature of 750 ° C, for 3.4 and 5 hours. The reactivity of the calcined products was measured using isothermal calorimetric analysis (DSC) on pastes prepared by mixing an alkaline solution of sodium hydroxide (NaOH) 8 M in an amount allowing to have a Na / Al ratio close to 1 (1: 1). Also, cubic mortar samples were prepared with a ratio L / S: 0.8, sealed and cured for 24 hours at 60 ° C and then at room temperature until the day they were submited to mechanical testing. to check the extent of geopolymerization. The results obtained allowed to optimize the calcination time of 5 hours for a better reactivity of these sediments, and a concentration of 8M of sodium hydroxide and more suitable to have the best mechanical performances.

scholarly journals MODERN METHODS OF INVESTIGATION PHASE AND ELEMENTAL COMPOSITION OF THE CORE

2013 ◽  
pp. 151-154
Author(s):  
M. Smirny ◽  
M. Epishev
Keyword(s):  
Shale Gas ◽  
Mineralogical Composition ◽  
Optimization Techniques ◽  
X Ray Diffraction ◽  
X Ray ◽  
Design And Optimization ◽  
Reservoir Rocks ◽  
The Core ◽  
Modern Methods ◽  
Methods Of Treatment

Successful problem solving design and optimization techniques hydrocarbon largely depends on the mineralogical composition of reservoir rocks. It mineralogical composition directly determines the applicability of certain methods of treatment reagent wells are needed, such as shale gas. In this article we have shown excellence and effectiveness of the X-ray diffraction analysis in combination with elemental analysis for problems of geological services.   

scholarly journals Modifying admixtures to cement compositions produced from local raw materials

2018 ◽  
Vol 143 ◽  
pp. 02006
Author(s):  
Daria Vasileva ◽  
Egor Protodiakonov ◽  
Anastasia Egorova ◽  
Svetlana Antsupova
Keyword(s):  
Cement Paste ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Raw Material ◽  
Free Calcium ◽  
Hardened Cement ◽  
X Ray Diffraction ◽  
Hardened Cement Paste ◽  
X Ray ◽  
Insoluble Compounds

Durability of hardened cement paste depends on chemical and mineralogical composition of Portland cement. The main factor for hardened cement paste is higher content of calcium aluminate and free calcium hydroxide, binding of which into water-insoluble compounds causes increase in resistance to water, frost and corrosion. The purpose of this research is to develop modifying admixtures to cement compositions based on local raw material - rock sand. Chemical and mineralogical properties of the source materials were studied using X-ray spectroscopy and X-ray diffraction analysis. Standard methods were used for defining physico-mechanical properties of sand and binder. Influence of the degree of mechanochemical activation of modifying admixture on the properties of binder and hardened cement paste made on its basis was studied. Research methods of scanning electron microscopy and spectral measurements were applied. The possibility of using admixture based on rock sand as a modifier was determined, its usage providing increase of strength, sulphate and frost resistance, which causes higher durability of cement concrete.

scholarly journals Chemical heterogeneity as a factor of improving the strength of steels manufactured by selective laser melting technology

2020 ◽  
Vol 242 ◽  
pp. 191
Author(s):  
Vadim ALEKSEEV ◽  
Boris BARAKHTIN ◽  
Anton ZHUKOV
Keyword(s):  
Cross Sections ◽  
Chemical Elements ◽  
Analysis Data ◽  
Raw Material ◽  
Laser Fusion ◽  
Low Carbon ◽  
Electron Microscopic ◽  
Thin Sections ◽  
X Ray ◽  
Powder Particles

The aim of this paper was to establish the causes of the heterogeneity of the chemical composition of the metal obtained by the LC technology. The powdered raw material was made from a monolithic alloy, which was fused by the SLM, the initial raw material was a laboratory melting metal of a low-carbon chromium-manganese-nickel composition based on iron. To determine the distribution pattern of alloying chemical elements in the resulting powder, electron-microscopic images of thin sections were combined with X-ray analysis data on the cross-sections of the powder particles. As a result, it was found that transition (Mn, Ni) and heavy (Mo) metals are uniformly distributed over the powder particle cross-sections, and the mass fraction of silicon (Si) is uneven: in the center of the particles, it is several times larger in some cases. The revealed feature in the distribution of silicon is supposedly due to the formation of various forms of SiO4 upon the cooling of the formed particles. The internal structure of the manufactured powder is represented by the martensitic structure of stack morphology. After laser fusion, etched thin sections revealed traces of segregation heterogeneity in the form of a grid with cells of ~ 200 μm.  

scholarly journals A petrochemical study of Mughal plasters of Quila-I-Ark, Aurangabad with respect to technology and repair

2020 ◽  
Vol 10 (2) ◽  
pp. 163-184
Author(s):  
Sneha Bakshi ◽  
Manager Rajdeo Singh
Keyword(s):  
Thin Section ◽  
Analytical Data ◽  
Water Channel ◽  
Mineralogical Composition ◽  
Raw Material ◽  
X Ray ◽  
Repair Mortar ◽  
Large Size ◽  
Thin Section Analysis ◽  
Section Analysis

This paper reports the mineralogical composition of western India's 16-17th century Mughal plasters of Quila-I-Ark, Aurangabad to prepare compatible repair mortar and document ancient Indian lime technology. Analytical studies were undertaken for aggregate grain size distribution, thin section analysis, Fourier Transform Infrared Spectrometer (FTIR), X-ray diffraction (XRD), and chemical composition of the plasters by x-ray fluorescence (XRF analysis). The analysis revealed the inclusion of large size basaltic aggregate grains mostly sourced from the water channel of nearby Harsullake. Some of the plaster works show prominent inclusion of small size grains pointing different periods of construction. Creamy white zeolites were found specifically added in the mortar mix to maintain a certain level of humidity during the dry season. The zeolite is highly porous and breaks easily both in dry and wet conditions. The calcite rich limestone with traces of magnesium was sourced as raw material for the plasters. Based on mineralogical composition and binder/aggregate ratio, three phases of historical constructions were documented. FTIR and thin section analysis showed the mixing of some proteinaceous adhesive juice in the lime for improvement in rheological and waterproof properties. The high quantity of large size aggregate grains ensured better carbonation of lime and the source of aggregates remained the same for all phases of historical constructions. The cementation index (C.I.) and hydraulicity index (H.I.) vary between 0.10 to 0.96 and 0.20 to 3.43, respectively showing the plaster is aerial lime with traces of magnesium. The plaster is feebly hydraulic as the hydraulic component calculated varies between 0.88 to 6.10 percent in different samples. A moderate strength plaster with a lime/silica ratio close to 0.33 was prepared for most phases of construction except a few isolated locations. The analytical data will now help to prepare compatible mortar with identical additives for a major repair.

PRODUCTION OF COMPOSITE CEMENT BASED ON INDUSTRIAL WASTE

2021 ◽  
pp. 38-45
Author(s):  
Ж. Т. Айменов ◽  
А. Ж. Айменов ◽  
Н. Б. Сарсенбаев ◽  
Б. К. Сарсенбаев
Keyword(s):  
Chemical Composition ◽  
Structure Formation ◽  
Industrial Waste ◽  
Mineralogical Composition ◽  
Carbonate Content ◽  
Thermal Methods ◽  
X Ray ◽  
Physicochemical Processes ◽  
Modern Methods ◽  
Composite Cements

Проведены исследования физико-химических процессов структурообразования композиционных цементов с добавкой отходов обогащения полиметаллических руд современными методами. Были определены минералогический состав, химический состав с использованием рентгенофазового, микроскопического, дифференциально-термического методов анализа. Это позволило установить, что содержание карбонатов в отходах обогащения полиметаллических руд до 30% не понизило прочности образцов. Investigations of the physicochemical processes of structure formation of composite cements with the addition of wastes of concentration of polymetallic ores by modern methods have been carried out. The mineralogical composition, chemical composition were determined using X-ray phase, microscopic, differential thermal methods of analysis. This made it possible to establish that the carbonate content in the wastes of enrichment of polymetallic ores up to 30% did not reduce the strength of the samples.

scholarly journals Dynamic hydrothermal synthesis of xonotlite fibers by alkali silica extraction of fly ash

2019 ◽  
Vol 14 ◽  
pp. 155892501989034 ◽  
Author(s):  
Xu Peng
Keyword(s):  
Fly Ash ◽  
Hydrothermal Synthesis ◽  
Coal Fly Ash ◽  
Synthesis Method ◽  
Morphological Characteristics ◽  
Mineralogical Composition ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Silica Material

The silica leached from coal fly ash using alkali, via the hydrothermal method, can be used as the raw material for the synthesis of xonotlite fibers through the hydrothermal synthesis method. This investigation was made to examine how the fly ash desilicated liquid influences the crystal growth and microstructure of xonotlite fibers. The obtained samples were characterized by X-ray diffraction and scanning electron microscope techniques to investigate their mineralogical composition and morphological characteristics. The results indicated that the pure desilication liquid leached from coal fly ash could be used to prepare xonotlite fibers. Xonotlite fibers with single crystal characteristics and large aspect ratio of 100–400 were successfully fabricated from fly ash desilication liquid, which is used as the silica material, at 240°C for 6 h.

Study of Ettringite by Hydration of Yeelimite Clinker

2016 ◽  
Vol 865 ◽  
pp. 126-129
Author(s):  
Radek Magrla ◽  
Karel Dvořák ◽  
Dominik Gazdič ◽  
Marcela Fridrichová
Keyword(s):  
Mineralogical Composition ◽  
Raw Material ◽  
Fluidized Bed Combustion ◽  
X Ray Diffraction ◽  
Laboratory Environment ◽  
X Ray ◽  
Ettringite Formation ◽  
Experimental Works ◽  
Potential Use

This article describes the results of experimental works, dealing with long-term observing of ettringite stability (Ca6Al2(SO4)3(OH)12·26H2O). Thermodynamic stability of this mineral is important in terms of potential use of fluidized bed combustion (FBC) ash as an additive to Portland cement. Within the experimental work it was carried out observing of the ettringite formation by hydration of yeelimitu (Ca4Al6(SO4)·O12) in laboratory conditions. For the preparation of yeelimite it was proposed a three-component raw material mixture, consisting of a high percent limestone and gypsum and corundum. This mixture was subsequently placed in platinum crucibles and burnt in superkanthal kiln at 1200 °C. Formed clinker was mixed in chosen ratio with water and it was prepared a set of testing samples. These samples were exposed in the laboratory environment for up to 180 days. The hydration of the clinker was carried out using X-ray diffraction analysis (XRD) by determining the mineralogical composition.

scholarly journals INFLUENCE OF PURIFICATION PROCESS ON THE CHARACTERISTICS OF ROMANIAN CALCIUM BENTONITE

2016 ◽  
Vol 22 (1) ◽  
pp. 32-37
Author(s):  
ANA-MARIA GEORGESCU ◽  
FRANÇOISE NARDOU ◽  
DENISA NISTOR ILEANA
Keyword(s):  
Environmental Remediation ◽  
Morphological Characteristics ◽  
Mineralogical Composition ◽  
Textural Analysis ◽  
Raw Material ◽  
Advanced Materials ◽  
Purification Process ◽  
X Ray ◽  
Calcium Bentonite

A calcium bentonite from Orasu Nou deposit (Romania) was used as raw material. The natural bentonite provided by S.C. Bentonita S.A., Satu Mare has the following mineralogical composition: 57 % montmorillonite, 40 % cristobalite, and 3 % quartz. Due to the relatively high percentage of impurities in natural calcium bentonite, we decided to purify the raw material, in order to improve the quality of montmorillonite. Through purification procedure, well defined granulometric fractions with particles of less than 2 μm, are obtained. The crude and purified calcium bentonites were characterized by textural analysis, scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX). The physical, structural and morphological characteristics are affected by the purification process. The purified bentonite can be used to obtain advanced materials, which can be tested as adsorbents for environmental remediation.

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