Jadambaa Temuujin
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View article: Detailed Analytical EPMA Study of the OPC Pastes Prepared with the Addition of Raw and Milled Fly Ashes
Detailed Analytical EPMA Study of the OPC Pastes Prepared with the Addition of Raw and Milled Fly Ashes Open
Concrete and cement pastes belong to the most used building materials in human history and represent a solidified mixture of ordinary Portland cement (OPC), water, course and fine-grained aggregates. Fly ash is used as a pozzolanic additiv…
View article: Mineralogical evolution of raw materials transformed to geopolymer materials: A review
Mineralogical evolution of raw materials transformed to geopolymer materials: A review Open
The geopolymerization reaction is a chemical process involving the dissolution of amorphous, semi-crystalline and crystalline phases following alkaline or acid attack at ambient or at low temperature (T˂100 °C). Together with precondensed …
View article: The Catalytic Potential of Modified Clays: A Review
The Catalytic Potential of Modified Clays: A Review Open
The need for innovative catalysts and catalytic support materials is continually growing due to demanding requirements, stricter environmental demands, and the ongoing development of new chemical processes. Since about 80% of all industria…
View article: Review of: "Effective use of Waste Materials: A Case Study of Utilization of Fly Ash in Flexible Pavement Structures"
Review of: "Effective use of Waste Materials: A Case Study of Utilization of Fly Ash in Flexible Pavement Structures" Open
The authors mentioned that burning anthracite or bituminous coal produces class C-fly ash.In contrast, lignite-type coals produce class F (Ref.15).However, so far, I know the class C fly ash is usually produced by the burning of lignite-ty…
View article: CSD 1781945: Experimental Crystal Structure Determination
CSD 1781945: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Evaluation of thermal and freeze-thaw resistances of the concretes with the silica fume addition at different water-cement ratio
Evaluation of thermal and freeze-thaw resistances of the concretes with the silica fume addition at different water-cement ratio Open
The preparation of concrete with improved durability is an essential subject in the development of building and construction materials. This study presents the preparation and characterization of a high-strength concrete by activating ordi…
View article: Potential directions for the use of various types of waste in Mongolia
Potential directions for the use of various types of waste in Mongolia Open
No abstract
View article: Influence of co-milling oxide physical properties on the structural changes of natural clinoptilolite zeolites
Influence of co-milling oxide physical properties on the structural changes of natural clinoptilolite zeolites Open
Zeolites are a family of open-framework aluminosilicate minerals used in many diverse fields, including building materials, agriculture, water treatment, and catalysis. In this study, natural zeolites were mechano-chemically treated by co-…
View article: Editorial: Green chemistry to recycle Fe/C-rich wastes for environmental pollution control
Editorial: Green chemistry to recycle Fe/C-rich wastes for environmental pollution control Open
EDITORIAL article Front. Chem., 13 April 2023Sec. Green and Sustainable Chemistry Volume 11 - 2023 | https://doi.org/10.3389/fchem.2023.1178615
View article: Characterization of Alkali Activated Materials Prepared from Continuous Attrition and Ball Milled Fly Ashes
Characterization of Alkali Activated Materials Prepared from Continuous Attrition and Ball Milled Fly Ashes Open
Mechanical activation is known to greatly influence the reactivity of fly ashes. In this paper, we report a comparative study of the properties of alkali-activated geopolymer materials prepared using both ball-milled and attrition-milled f…
View article: Possibility of obtaining a porous silica material from Khongor-ovoo kaolinite by mechanochemical activation
Possibility of obtaining a porous silica material from Khongor-ovoo kaolinite by mechanochemical activation Open
Kaolinite contains the largest amount of aluminosilicate, has a high surface area and volume ratio, is closely connected with tetrahedral Si2O5 and octahedral AI2(OH)4 sheets, and thus forms a two-sheet phyllosilicate structure. It belongs…
View article: Preparation of catalyst from natural montmorillonite mineral and its application in the synthesis of carbon nanosphere
Preparation of catalyst from natural montmorillonite mineral and its application in the synthesis of carbon nanosphere Open
In developed countries, nanoparticles derived from natural minerals and high-purity chemicals both are widely studied, while in developing countries like Mongolia, the natural minerals-based nanoparticles have more interest because of the …
View article: Message from the Editor-in-Chief
Message from the Editor-in-Chief Open
No abstract in English
View article: Microstructural and thermal characterization of concretes prepared with the addition of raw and milled fly ashes
Microstructural and thermal characterization of concretes prepared with the addition of raw and milled fly ashes Open
The influences of mechanically activated fly ash on the microstructure and thermal behaviour of atmospheric-cured concrete panels have been evaluated. For this purpose, comparative analyses of concretes prepared with and without addition o…
View article: Preface - volume 22(48), 2021
Preface - volume 22(48), 2021 Open
No Abstract in English
View article: Preface - vol. 20
Preface - vol. 20 Open
No Abstract in English
View article: Preliminary results on the preparation of carbon nanotubes using arc discharge in water medium
Preliminary results on the preparation of carbon nanotubes using arc discharge in water medium Open
Depending on the application, carbon nanotubes are being intensively studied in physics, chemistry, medicine, and computers. Therefore, it is important to develop large-scale high-quality multi-walled carbon nanotubes production at low cos…
View article: Preface Vol.20
Preface Vol.20 Open
no Abstract in English
View article: Characterization of mica from bodonchiin gol deposit (Mongolia)
Characterization of mica from bodonchiin gol deposit (Mongolia) Open
Although there are many mica deposits in Mongolia, there is no substantial study of the composition of the mica and the chemical composition and on their utilization. In this work, we characterized the minerals composition of two different…
View article: Reactivity of fly ashes milled in different milling devices
Reactivity of fly ashes milled in different milling devices Open
The effect of two different milling devices, namely attrition mill versus vibration mill, on the reactivity of fly ash was studied. High calcium fly ash from 4 th Thermal power station of Ulaanbaatar (Mongolia) was used for the experiments…
View article: Leaching of a Mongolian chalcopyrite concentrate
Leaching of a Mongolian chalcopyrite concentrate Open
A Mongolian chalcopyrite flotation concentrate was leached using sodium hypochlorite adjusted to different pH using hydrochloric acid. It was found that using a starting pH of below 5.0 resulted in more efficient leaching. The extent of ch…
View article: Preface
Preface Open
No abstract in English
View article: Preparation of rare earth oxides from Synchysite oxidized ore by acid leaching
Preparation of rare earth oxides from Synchysite oxidized ore by acid leaching Open
Mixed rare earth oxides have been prepared from synchysite ore from the Lugiin gol rare earth deposit (Mongolia) which contains about 6% of cerium light rare earth elements. Ore powders were leached for up to 60 min using 80-120 g/l sulfur…
View article: Properties of geopolymer binders prepared from milled pond ash
Properties of geopolymer binders prepared from milled pond ash Open
Alkali-activated materials were prepared from pond ash from the Darkhan city (Mongolia) thermal power station. This ash contains about 60 wt % X-ray amorphous material in addition to quartz, mullite, hematite and magnesioferrite, and prese…
View article: Comparative study of mechanical activation of molybdenite (MoS2) with and without magnesium (Mg) addition
Comparative study of mechanical activation of molybdenite (MoS2) with and without magnesium (Mg) addition Open
Molybdenite concentrate was mechanically activated in the presence of magnesium metal using a planetary mill in order to try to form elemental molybdenum. A sample milled for 90 min in planetary mill showed almost the same structural disto…
View article: COMPARATIVE STUDY OF MORPHOLOGY OF VARIOUS FLY ASHES AND POND ASHES FROM DIFFERENT THERMAL POWER STATIONS IN MONGOLIA
COMPARATIVE STUDY OF MORPHOLOGY OF VARIOUS FLY ASHES AND POND ASHES FROM DIFFERENT THERMAL POWER STATIONS IN MONGOLIA Open
In Mongolia coal fired thermal power stations produce over 90% of the country’s electricity. Three thermal power stations located in Ulaanbaatar city produce more than 80% of all electricity produced in Mongolia. The annual output of fly a…