scholarly journals THEORETICAL BASIS OF COMPATIBILITY OF COMPLETELY-FILLED MULTICOMPONENT BINDING SYSTEMS

2020 ◽  
Vol 47 (1) ◽  
pp. 165-173
Author(s):  
M. Sh. Salamanova ◽  
S. A.Yu. Murtazaev ◽  
D. K.-S. Bataev ◽  
A. Kh. Alaskhanov
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Multicomponent System ◽  
Potassium Feldspar ◽  
Cement Stone ◽  
Multicomponent Systems ◽  
Russian Science ◽  
Unique Identifier ◽  
Factors Affecting ◽  
Mineral Powder

Abstract. Aim. An important direction in contemporary concrete science is aimed at the development of multicomponent systems using mineral powder fillers in a finely dispersed state to create strong and durable building composites. One of the most significant factors affecting the properties of multicomponent systems is the compatibility of its components. Efforts on the part of leading scientific institutes are aimed at replacing expensive and energy-intensive Portland cement with composite concrete products produced using mixed binders. In this context, the development of modern effective composites based on clinkerless alkaline binders becomes an urgent problem. Methods. Studies into the compatibility of multicomponent cementing systems are based on a contemporary technological approach that contributes to the production of strong and durable cement stone, without the use of traditional Portland cement. Results. Electron probe studies and X-ray phase analysis of concrete produced using a clinker-free alkaline activation binder showed that the studied multicomponent system contains a hydro-aluminosilicate zeolite phase of variable composition, as well as indicating the presence of calcite, quartz, albite feldspar, mica, zeolites and potassium feldspar. Conclusion. The results of the studies confirm the compatibility of all components of the multicomponent system comprised of mineral powder, alkaline coater and surfactant. The proposed technological method can be used to produce strong and durable building composites with clinker-free technology avoiding the use of expensive and energy-intensive Portland cement. Acknowledgments. The work was performed as part of research on the implementation of scientific project No. 05.607.21.0320. “Development of technology for new building composites on clinker-free alkaline binders using substandard natural and secondary raw materials” which received support from the federal target program “Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex for 2014-2020.” Unique identifier for the agreement RFMTFI60719X0320.

scholarly journals FORMATION OF THE STRUCTURE OF MULTICOMPONENT ALKALI BASIC KNITTING SYSTEMS

2020 ◽  
pp. 48-56
Author(s):  
С-А. Ю. Муртазаев ◽  
М. Ш. Саламанова
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Multicomponent System ◽  
Cement Stone ◽  
Urgent Problem ◽  
Technological Method ◽  
Relevant Today ◽  
Scientific Schools ◽  
Fundamental Research ◽  
Scientific Project

Использование бетонов на чистом портландцементе сегодня не столь актуально, так как ведущие научные школы мира в этом направлении стараются получать композиты на смешанных вяжущих, путем замены дорогого и энергоемкого портландцемента. Поэтому разработка современных эффективных композитов на основе бесклинкерных вяжущих щелочной активации, безусловно, является актуальной проблемой. В основу проведенных исследований положен современный технологический прием, способствующий получению прочного и долговечного цементного камня, без применения традиционного портландцемента. Результаты проведенных исследований подтверждают совместимость всех компонентов многокомпонентной системы «минеральный порошок - щелочной затворитель - ПАВ», а предлагаемый технологический прием позволит получать прочные и долговечные строительные композиты по бесклинкерной технологии, без применения дорогого и энергоемкого портландцемента. Работа выполнена в рамках исследований по реализации научного проекта № 18-48-200001 «Высококачественные бетоны с повышенными эксплуатационными свойствами на основе местного природного и техногенного сырья», получившего поддержку Российского фонда фундаментальных исследований» (РФФИ). The use of concrete on pure Portland cement is not so relevant today, as the leading scientific schools of the world in this direction are trying to obtain composites on mixed binders by replacing expensive and energy-intensive Portland cement. Therefore, the development of modern effective composites based on clinkerless alkaline binders is certainly an urgent problem. The research is based on a modern technological method that contributes to the production of strong and durable cement stone, without the use of traditional Portland cement. The results of the studies confirm the compatibility of all components of the multicomponent system “mineral powder - alkaline caster - surfactant”, and the proposed technological method will allow to obtain strong and durable building composites using clinker-free technology, without the use of expensive and energy-intensive Portland cement. The work was implemented as part of research on the fulfillment of scientific project No. 18-48-200001 “High-quality concrete with enhanced performance properties based on local natural and secondary raw materials,” which received support from the Russian Foundation for Fundamental Research (RFFR).

Recipes of Knitting Systems Alkaline Activation Using Natural Raw Materials of the Chechen Republic

2020 ◽  
Vol 1011 ◽  
pp. 1-7
Author(s):  
Madina Salamanova ◽  
Dena Bataev ◽  
Aminat Uzayeva ◽  
Zurab Gacayev
Keyword(s):  
Raw Materials ◽  
Practical Importance ◽  
Cement Stone ◽  
Russian Science ◽  
Unique Identifier ◽  
Federal Target Program ◽  
Energy Consuming ◽  
Scientific Project ◽  
Alkaline Activator ◽  
Theoretical Foundations

The alkaline clinker-free binders formulations activation development based on fine powders of aluminosilicate nature will allow to obtain the effective building composites. The paper reveals the issues related to the theoretical foundations of the cement stone structure and strength formation based on the alkaline activator. The research results, in our opinion, are undoubtedly of practical importance for the construction industry, since the proposed recipes for clinker-free cements will replace the expensive and energy-consuming Portland cement, allowing to create strong and durable concrete and reinforced concrete structures. The results presented in this article have been obtained in the framework of research on the implementation of scientific project No. 05. 607.21.0320. “Development of technology for new building composites on clinker-free alkaline binders using substandard natural and secondary raw materials” which received support from the federal target program “Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex for 2014-2020”. The unique identifier for the agreement is RFMTFI60719X0320.

Recipes and Properties of Multicomponent Systems "Aspiration Dust - Mineral Powder - Na2SiO3"

2021 ◽  
Vol 1017 ◽  
pp. 143-152
Author(s):  
Madina Salamanova ◽  
Said Alvi Murtazaev ◽  
Dena Bataev ◽  
Magomed Nakhaev ◽  
Bakhytzhan Sarsenbayev
Keyword(s):  
Raw Materials ◽  
Resource Saving ◽  
Unique Identifier ◽  
Federal Target Program ◽  
Alkaline Activation ◽  
Technological Complex ◽  
Target Program ◽  
Scientific Project ◽  
Energy Saving Technology ◽  
Mineral Powder

The paper presents the results of studies of the effect of the concentration of binder components on the properties of cement alkaline stone. Formulations of clinker-free binders of alkaline activation with the level of filling the system of 20 and 40% have been developed, the properties of the cement paste of the binding binder "aspiration dust - mineral powder - liquid glass" have been studied, the dynamics of a set of strength indicators has been studied, both for bending and compressive forces. The received results allow to estimate uniqueness of properties of a binding binder "a mineral powder - Na2SiO3" and to create new materials on resource saving and energy saving technology. The results presented in this article were obtained within the framework of studies on the implementation of scientific project No. 05. 607.21.0320. "Development of technology for new building composites based on clinkerless cement of alkaline activation using substandard natural and secondary raw materials" supported by the Federal Target Program "Research and Development in Priority Areas of Development of the Scientific and Technological Complex of Russia for 2014-2020". The unique identifier for the agreement is RFMTFI60719X0320.

Solid Waste Management on Romanian Households

2018 ◽  
Vol 68 (12) ◽  
pp. 2941-2947
Author(s):  
George Ungureanu ◽  
Gabriela Ignat ◽  
elena Leonte ◽  
Carmen Luiza Costuleanu ◽  
Nicoleta Stanciu ◽  
...  
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Agricultural Development ◽  
Management Practices ◽  
Solid Waste Management ◽  
Raw Materials ◽  
Rapid Development ◽  
Disposal Site ◽  
Solid Waste Disposal ◽  
Factors Affecting

The problem associated with the household behavior on solid waste disposal site in today�s society is complex because of the large quantity and diverse nature of the wastes. Due increase the population, rapid development, global agricultural development has moved rapidly, limitations of financing, emerging limitations of both energy and raw materials and also add to the complexity of any waste management system, large quantities of wastes are being generated in different forms such as solid, liquid and gases. This research explored factors affecting the level of participation in solid waste segregation and recycling of households in Romania, as well as examining current Romania households waste management practices and their knowledge of waste management. This study investigated the solid waste situation and the organization of solid waste management in both urban and rural settings from the perspective of households. Solid waste management is a key component of public services which needs to serve the urban and rural municipalities in an efficient way in order to maintain a decent standard of public health.

scholarly journals Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1015 ◽  
Author(s):  
Emy Aizat Azimi ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Petrica Vizureanu ◽  
Mohd Arif Anuar Mohd Salleh ◽  
Andrei Victor Sandu ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Fly Ash ◽  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Raw Materials ◽  
Liquid Sodium ◽  
Strength Development ◽  
Elemental Distribution ◽  
Distribution Analysis ◽  
Geopolymer Composites

A geopolymer has been reckoned as a rising technology with huge potential for application across the globe. Dolomite refers to a material that can be used raw in producing geopolymers. Nevertheless, dolomite has slow strength development due to its low reactivity as a geopolymer. In this study, dolomite/fly ash (DFA) geopolymer composites were produced with dolomite, fly ash, sodium hydroxide, and liquid sodium silicate. A compression test was carried out on DFA geopolymers to determine the strength of the composite, while a synchrotron Micro-Xray Fluorescence (Micro-XRF) test was performed to assess the elemental distribution in the geopolymer composite. The temperature applied in this study generated promising properties of DFA geopolymers, especially in strength, which displayed increments up to 74.48 MPa as the optimum value. Heat seemed to enhance the strength development of DFA geopolymer composites. The elemental distribution analysis revealed exceptional outcomes for the composites, particularly exposure up to 400 °C, which signified the homogeneity of the DFA composites. Temperatures exceeding 400 °C accelerated the strength development, thus increasing the strength of the DFA composites. This appears to be unique because the strength of ordinary Portland Cement (OPC) and other geopolymers composed of other raw materials is typically either maintained or decreases due to increased heat.

Preparation of Alternative Hydraulic Binder Based on Secondary Raw Materials

2014 ◽  
Vol 1000 ◽  
pp. 12-15
Author(s):  
Jiří Švec ◽  
Tomáš Opravil ◽  
Jiří Másilko
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Construction Materials ◽  
High Volume ◽  
Point Of View ◽  
Hydraulic Lime ◽  
Combustion Gases ◽  
Secondary Raw Materials ◽  
Hydraulic Binder ◽  
Massive Scale

Reusing and recycling of secondary raw materials from high-volume industrial productions (especially form construction materials and binders fabrications) is very important way of conserving environment and it is also interesting from the economical point of view. The production of common hydraulic binders, especially Portland cement, burdens the environment with considerable amount of combustion gases and consumes energy in massive scale. Alternative (low – energy) binder can be used as Portland cement substitution in applications with lower mechanical properties requirements. Mined limestone wash sediments contain large amount of clay components, but there is also indispensable share of fine calcite. This composition makes these sediments a promising material for the preparation of hydraulic binders as Roman cement or hydraulic lime.

scholarly journals Analysis of factors affecting the market capitalization of the largest oil companies in Russia

2021 ◽  
Vol 1 ◽  
pp. 142-149
Author(s):  
Vladimir Nikolaevich PODKORYTOV ◽  
◽  
Lyudmila Anatol’evna MOCHALOVA ◽  
Keyword(s):  
Raw Materials ◽  
Correlation Coefficients ◽  
Equity Capital ◽  
Linear Regression Models ◽  
Factors Affecting ◽  
Market Capitalization ◽  
Oil Companies ◽  
Operating Profit ◽  
Cost Factors ◽  
Oil Company

Relevance. The stock exchange prices of shares reflect the view from the market position of the value of a particular public company: the market capitalization of the issuing company acts as a value indicator. The volatility of stock prices, on the other hand, determines the dynamics of market capitalization. In this regard, the problem of market capitalization management and its forecasting in the future becomes urgent. Taking into account the raw materials orientation of the Russian economy, enterprises of the mineral raw materials complex are of particular interest from the point of view of value management. The purpose of the study is to identify the most significant external and internal cost factors affecting the market capitalization of the largest oil companies in Russia, and to calculate promising cost management models. Research methods. In the process of studying value factors on the basis of retrospective statistical data and methods of correlation analysis were used. Results. The correlation analysis of the following variables was carried out: price per 1 share of an oil company observed on the Moscow Exchange; the price of Brent crude oil; revenues from sales; operating profit; net profit; company assets; equity capital of the company. Based on the analysis, the factors with the highest correlation coefficients were selected in relation to the dependent variable “price per 1 share of an oil company observed on the Moscow Exchange”, as well as with relatively low values of pair correlation coefficients directly with each other in order to avoid the effect of multicollinearity. The variables included in the model are: the price of Brent crude; revenues from sales; operating profit; company assets; equity capital of the company. Linear regression models have been constructed for PAO Rosneft, PAO Lukoil, and PAO Tatneft. Conclusions. A detailed analysis of the obtained linear regression models taking into account the correlation coefficients, t-statistics, significance level values (P-values), determination coefficients R2, calculated values of F-criteria showed generally conflicting results. The most significant models are single-factor price models, in which sales revenue acts as an independent variable. Other models require their refinement through careful analysis and more observations. It is planned to continue research and search for cost factors that affect the change in market capitalization not only for oil companies but for other enterprises of the mineral resource complex as well.

scholarly journals Analisis Faktor Produksi Kalapa Sawit Rakyat Menurut Tipologi Lahan di Kabupaten Indragiri Hilir Provinsi Riau

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Heriyanto Heriyanto ◽  
Asrol Asrol ◽  
Detri Karya ◽  
Verry Yarda Ningsih
Keyword(s):  
Palm Oil ◽  
Oil Palm ◽  
Raw Materials ◽  
Least Square ◽  
Added Value ◽  
Dominant Factor ◽  
Factors Affecting ◽  
The Difference ◽  
Cultivation Techniques ◽  
Coastal Land

Heriyanto et al, 2018. Analysis of the Production Factors of the People's Palm Oil According to the Land Typology in Indragiri Hilir Regency, Riau Province. JLSO 7(1): Palm oil commodities are one of the plantation sub-sector commodities that increase the income of farmers and the community, provide processing industry raw materials that create added value. The land cultivated by independent oil palm farmers consists of land land, tidal peatlands, coastal peatlands and coastal land. The difference in typology of this land will contribute to different production. The research aimed to analyze the oil palm production and the dominant factor affecting oil palm production according to the typology of land in Indragiri Hilir Riau Province. The data were analyzed using descriptive statistics and built multiple regression models with the dummy variable method of Ordinary Least Square (OLS). The results of the study showed that the production of oil palm cultivation on land is the highest compared to the typology of tidal peatland, coastal peat and coastal land. The dominant factors affecting palm oil production in Indragiri Hilir Regency were the amount of fertilizer use, labor, age of plants, herbicides and dummy typology of land. In order to obtain optimal production, this study recommended doing oil palm farming in accordance with the correct cultivation techniques in accordance with the characteristics of land typology. Besides that the use of balanced fertilizer (elements of N, P, and K) in accordance with the recommended needed to be applied.

scholarly journals A Study of the Potential Use of Red Mud to Obtain Compositions Based on Portland Cement

2020 ◽  
Author(s):  
Ekaterina Gerasimova ◽  
Elizaveta Gumirova
Keyword(s):  
Portland Cement ◽  
Red Mud ◽  
Waste Product ◽  
Cement Stone ◽  
Mathematical Planning ◽  
Alumina Production ◽  
Mineral Additive ◽  
Composition Properties ◽  
Planning Of Experiments ◽  
Potential Use

The paper deals with the problem of utilization of red mud which is a waste product from alumina production using the Bayer method. The principal possible use for the red mud of JSC “Bogoslovsky aluminum plant” (Sverdlovsk region) for the compositions based on Portland cement is shown. It was found that the mud introduction accelerates beginning of the cement paste setting and thickens the paste reducing its mobility. It is concluded that the introduction of red mud up to 30 % is justified in terms of strength indicators. The work is carried out using mathematical planning of experiments. Keywords: red mud, Portland cement, active mineral additive, composition, properties, bauxite, chemical composition, cement stone strength, mathematical planning of experiments

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