scholarly journals Study of zeolite-containing silicon rocks of Dagestan for obtaining a mineral additive to cement

2021 ◽  
Vol 10 ◽  
pp. 42-46
Author(s):  
A. R. Yusupov ◽  
◽  
S. A. Mamaev ◽  
Z. A. Yusupov ◽  
A. S. Mamaev
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Total Content ◽  
Cement Clinker ◽  
Resource Base ◽  
Siliceous Rocks ◽  
Productive Stratum ◽  
Mineral Additive ◽  
The Republic ◽  
Technological Study

Siliceous-carbonate rocks are widespread on the territory of the Republic of Dagestan, in which the total content of zeolites and opal-cristobalite-tridymite phase (OCT) exceeds 45 %, and the content of calcite is above 30 %. The rocks, composing a productive stratum (at least, most of it), lithologically correspond to opoka-like and highly siliceous limestones, zeolite-containing (10–15 %) and zeolite (40 % or more), weakly quartz and weakly clayey. However, they are distinguished from pure limestones by a low value of actual calcite part — often less than 50 %. Therefore, in this case, the section of the productive strata is defined as «folded by siliceous-carbonate zeolite-containing rocks.» Such rocks, in accordance with the results of laboratory and technological study, are considered as raw materials for the production of building materials. Zeolite-containing rocks are suitable for use as an additive in Portland cement, which will save cement clinker in the production process and improve the quality of cement. Prospecting works for zeolites and zeolite-containing rocks in the Levashinskaya (Levashinsky district) and Rubaschayskaya (Tabasaran and Kaitagsky districts) areas of Mountainous Dagestan were carried out by the non-metallic party of JSC Sevkavgeologiya in 2007–2009. The resources of siliceous zeolite-containing rocks are in the P1 category — 49.308 million tons, in the P2 category — 69.470 million tons. The predicted resources, their laboratory and technological properties (physicochemical, chemical, technological) indicate the possibility of creating a solid mineral resource base and construction of large complexes for the extraction and processing of zeolites and siliceous rocks in Levashinsky (Levoberezhny and Pravoberezhny areas) and Tabasaran (Dyubek area) regions of the Republic of Dagestan.

scholarly journals CEMENT MARKET IN UKRAINE

2021 ◽  
Vol 38 (2) ◽  
pp. 4-15
Author(s):  
POLIUHA Valentyna ◽  
ZOLOTARIOVA Oksana ◽  
KOMAKHA Olha
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
The State ◽  
Cement Clinker ◽  
Significant Difference ◽  
Retail Prices ◽  
General Scientific ◽  
Retail Chains ◽  
The Difference ◽  
The Republic

Background. The building materials industry includes the production of cement, bricks and other materials. The state of the cement market is of particular interest. An analysis of recent research and publications has shown that in order to generalize and specify the situation on the Ukrainian cement market, it is necessary to analyse statistics on production, consumption and export-import operations with cement. The aim of the article is to establish trends in the development of production, con­sumption, export and import operations with cement in Ukraine. Materials and methods. The work used general scientific and special methods of analysis, as well as publicly available sources of statistical information. Results. According to the State Statistics Service of Ukraine, over the past five years there has been an increase in production of all types of cement in quantitative equi­valent by almost 13.4 %, refractory cements – by 57.1 %, and alumina cement, clinker-free slag cement and hydraulic cements – 1.8 times. During 2016–2020, there was a tendency to increase wholesale prices for M-400 cement. During this period, the price increased 1.6 times and is mainly due to higher prices for raw materials. The difference in retail prices for cement in the largest retail chains in Ukraine is 25 %, which is a significant fluctuation. The analysis of the dynamics of cement exports from Ukraine during 2015–2020 showed a tendency to increase its volumes by more than 2 times. If we compare the volumes of imports and exports of cement, in 2020 the volumes of cement imports exceeded the volumes of exports by 33.8 % in monetary terms. The largest volumes of cement in 2020 were imported to Ukraine from Turkey – 91 % of all deliveries, from Poland, Bulgaria, Lithuania and Germany – 2 % each, and from other countries only 1 %. During 2015–2020, the largest share in the structure of domestic cement exports abroad belonged to Romania, having increased almost 5 times in 2017–2020. In second place amongimporting countries there are Hungary and the Republic of Moldova. Conclusion. In recent years, the cement market in Ukraine is gradually deve­loping. The analysis of development trends showed that its main producers are several large groups – private joint-stock companies, which produce 99.8 % of the total volume of these products. Studies have shown that during 2014–2020 there was a slight increase in pro­duction and consumption of all types of cement in Ukraine. Monitoring of cement prices showed that during 2016–2020 there was an increase in wholesale prices for M-400 cement: in four years they increased by more than 60 %. There is a significant difference in retail prices of cement in the seven largest retail chains in Ukraine at 25 %. Analysis of the dynamics of cement exports from Ukraine in 2015–2020 showed that they more than doubled, but imports of this product in 2020 exceeded exports by 33.8 % in monetary terms.

scholarly journals The Influence of Cement Substitution by Biomass Fly Ash on the Polymer–Cement Composites Properties

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3079
Author(s):  
Beata Jaworska ◽  
Dominika Stańczak ◽  
Joanna Tarańska ◽  
Jerzy Jaworski
Keyword(s):  
Fly Ash ◽  
Building Materials ◽  
Raw Materials ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Cement Composites ◽  
Cement Mortars ◽  
Mineral Additive ◽  
Biomass Fly Ash

The generation of energy for the needs of the population is currently a problem. In consideration of that, the biomass combustion process has started to be implemented as a new source of energy. The dynamic increase in the use of biomass for energy generation also resulted in the formation of waste in the form of fly ash. This paper presents an efficient way to manage this troublesome material in the polymer–cement composites (PCC), which have investigated to a lesser extent. The research outlined in this article consists of the characterization of biomass fly ash (BFA) as well as PCC containing this waste. The characteristics of PCC with BFA after 3, 7, 14, and 28 days of curing were analyzed. Our main findings are that biomass fly ash is suitable as a mineral additive in polymer–cement composites. The most interesting result is that the addition of biomass fly ash did not affect the rheological properties of the polymer–cement mortars, but it especially influenced its compressive strength. Most importantly, our findings can help prevent this byproduct from being placed in landfills, prevent the mining of new raw materials, and promote the manufacture of durable building materials.

scholarly journals Heat-insulating porous material based on glauconite-containing sands and aleurites of the Novodvorskoye deposit of the Republic of Belarus

2021 ◽  
Vol 57 (4) ◽  
pp. 463-471
Author(s):  
S. E. Barantseva ◽  
A. I. Pazniak ◽  
Y. A. Klimosh ◽  
I. M. Azaranka ◽  
N. N. Hundzilovich ◽  
...  
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Molding Process ◽  
Resource Base ◽  
Coefficient Of Thermal Conductivity ◽  
Rational Combination ◽  
The Republic ◽  
Main Component

The results on the research of heat-insulating porous ceramic materials produced using overburden rocks of the Novodvorsk deposit of Pinsk district of the Brest region as the main component of raw materials are presented in the study and the use of bulk rock consisting of glauconite sands and aleurites is recommended. Low-melting clay, basalt and a blowing agent are used as additional components, rational combination of which would ensure the forming ability of ceramic masses and the required set of the physicochemical properties of the material. The dependence of the bulk density, swelling coefficient, coefficient of thermal conductivity on the chemical and mineral composition of the used and raw materials is established, wich is the criteria for choosing composition with the maximum use of overburden and the necessary plasticity of the ceramic mass required for the molding process of raw granules. The obtained results can serve as a basis for the large-scale use of not only the minerals of the Novodvorsk deposit (basalts and tuffs), but also associated – glauconite-containing overburden. This will make a significant contribution to the expanding the mineral resource base of the Republic of Belarus.

scholarly journals COMPARATIVE EVALUATION OF ANTIOXIDANT ACTIVITY OF EXTRACTS OF BERGENIA CRASSIFOLIA (L.) FITSCH LEAVES OF DIFFERENT TERMS OF VEGETATION

2020 ◽  
pp. 231-239
Author(s):  
Svetlana Vladimirovna Tsyrendorzhieva ◽  
Sesegma Dashiyevna Zhamsaranova
Keyword(s):  
Raw Materials ◽  
Antioxidant Properties ◽  
Total Content ◽  
Leaf Extracts ◽  
Green Leaves ◽  
Chelating Ability ◽  
The Republic ◽  
Bergenia Crassifolia ◽  
Maximum Content

New data on the chemical composition and antioxidant properties of aqueous leaf extracts of Bergenia crassifolia (L.) Fitsch of different periods of vegetation growing in the Republic of Buryatia were obtained. It is shown that this is one of the few plants whose leaves contain a significant amount of phenolic compounds. The maximum content of tannins was noted in the extract of red leaves of the incense – 2.42%. Depending on the phase of the collection of raw materials, the content of flavonoids in the water extracts of the leaves of the frangipani varied from 3.88 to 5.42%. A higher accumulation of flavonoids was observed in the extract of black leaves of badan, which is apparently associated with leaf fermentation, in which the cellular structure is destroyed, enzymes and polyphenols are released. The leader in determining the total content of anthocyanins, as well as for flavonoids, was the extract of black leaves of frankincense. The largest amount of arbutin was contained in the extract of green leaves of frankincense – 1.22%. The studied extracts had a high ability to absorb free radicals, however, the extract of green leaves of badan had the highest antiradical activity, had a minimum EC50 of 4 mg/cm3. The iron-chelating ability of the tested aqueous extracts of frankincense leaves of different periods of in vitro vegetation showed that the leaf extracts had weak iron-chelating activity.

Antioxidant content of oat talkan made from sprouted grain

2021 ◽  
pp. 96-99
Author(s):  
Алена Владимировна Сумина ◽  
Вадим Игоревич Полонский ◽  
Татьяна Михайловна Шалдаева
Keyword(s):  
Antioxidant Activity ◽  
Room Temperature ◽  
Raw Materials ◽  
Total Content ◽  
Chemical Compounds ◽  
Food Products ◽  
Raw Material ◽  
Bidistilled Water ◽  
Functional Value ◽  
The Republic

Одним из путей повышения функциональной ценности пищевых продуктов является увеличение содержания в них химических соединений, обладающих антиоксидантной активностью. Последние, как известно, играют важную роль в профилактике различных заболеваний человека. Антиоксидантами богаты зерновые культуры, на основе которых изготавливаются наиболее употребляемые населением продукты питания. Целью данного исследования являлось определение величины суммарного содержания антиоксидантов (ССА) в зерновом сырье на разных этапах производства хакасского национального продукта талган, изготовленного из пророщенного зерна овса. Овес выращивали на территории Бейского района Республики Хакасия в 2019 г. Очищенное зерно проращивали при комнатной температуре в течение 56 ч, затем его просушивали и обжаривали при температуре 180…200 °С в течение 10-15 мин, а далее измельчали и просеивали через сита с ячеей 0,9 мм. В результате получали продукт талган и отходы в виде отрубей. Для определения уровня ССА в зерне использовали два растворителя - горячую бидистиллированную воду и 70 %-ный этиловый спирт. Измерение значения ССА выполняли на приборе «Цвет Яуза-01-АА». Среди исследуемых образцов более высокие показатели ССА были зарегистрированы при использовании в качестве элюента горячей бидистиллированной воды. В работе выявлен эффект увеличения уровня ССА в конечном продукте по сравнению с исходным сырьем после этапа проращивания зерна в среднем в 2 раза, а после этапов обжаривания и измельчения в 2,1 раза. Величина ССА в отрубях превышала таковую в исходном зерне в среднем на 47 %. Таким образом, в результате исследований было установлено, что введение в технологию изготовления овсяного талгана дополнительного этапа, заключающегося в проращивании зерна, является одним из эффективных способов повышения величины ССА в полученном на его основе продукте. One of the ways to increase the functional value of food products is to increase the content of chemical compounds that have antioxidant activity. The latter are known to play an important role in the prevention of various human diseases. Antioxidants are rich in cereals, on the basis of which the most commonly consumed food products are made. The purpose of this study was to determine the value of the total content of antioxidants (TCA) in grain raw materials at different stages of production of the Khakass national product talgan, made from sprouted oat grain. Oats were grown on the territory of the Bey district of the Republic of Khakassia in 2019. The purified grain was sprouted at room temperature for 56 hours, then it was dried and fried at a temperature of 180…200 oC for 10-15 minutes, and then ground and sieved through sieves with a mesh of 0.9 mm. As a result, the product talgan and waste in the form of bran were obtained. To determine the level of TCA in the grain, two solvents were used - hot bidistilled water and 70 % ethyl alcohol. The TCA value was measured on the device «Color Yauza-01-AA». Among the studied samples, higher TCA values were recorded when using hot bidistilled water as an eluent. The paper reveals the effect of increasing the level of TCA in the final product in comparison with the initial raw material after the stage of grain germination by an average of 2 times, and after the stages of roasting and grinding by 2.1 times. The value of TCA in bran exceeded that in the original grain by an average of 47 %. Thus, as a result of research, it was found that the introduction of an additional stage in the production technology of oatmeal talgan, which consists in the germination of grain, is one of the effective ways to increase the value of TCA in the product obtained on its basis.

Studies of amorphous-siliceous rocks of the Republic of Kazakhstan as mineral raw materials in the formation of the porous structure of heat-insulating foam glass

2020 ◽  
pp. 5-9
Author(s):  
B. E. Zhakipbaev ◽  
A. S. Kolesnikov ◽  
G. S. Kenzhibaeva ◽  
N. E. Botabaev ◽  
A. N. Kutzhanova ◽  
...  
Keyword(s):  
Glass Powder ◽  
Raw Materials ◽  
Foam Glass ◽  
Insulation Material ◽  
Foam Material ◽  
Mineral Raw Materials ◽  
Blowing Agent ◽  
Siliceous Rocks ◽  
Multicomponent Glass ◽  
The Republic

Foam glass is known mainly as a cellular thermal insulation material obtained by sintering a mixture of glass powder and a blowing agent followed by annealing of the foam material. This article explores the possibility of producing heat-insulating foam glass directly from widely available amorphous-siliceous natural flasks, eliminating economically disadvantageous and energy-intensive processes of cooking and granulation of special multicomponent glass melt from the scheme of traditional technology.

scholarly journals THE INFLUENCE OF FORCED CARBONIZATION ON THE PROPERTIES OF GYPSUM-LIME SYSTEMS BASED ON SECONDARY RAW MATERIALS

2022 ◽  
Vol 4 (6) ◽  
pp. 69-81
Author(s):  
Aleksandr Bahtin ◽  
Nikolay Lyubomirskiy ◽  
S. Fedorkin ◽  
Tamara Bahtina ◽  
G. Bilenko
Keyword(s):  
Building Materials ◽  
Water Resistance ◽  
Raw Materials ◽  
Modern Trend ◽  
Secondary Raw Materials ◽  
Effective Activity ◽  
The Republic ◽  
Short Time ◽  
Softening Coefficient ◽  
Physical And Mechanical Characteristics

the use of secondary raw materials for the production of building materials is a modern trend in solving environmental problems. In the Republic of Crimea, dumps of secondary raw materials – phosphogypsum and lime dust – have accumulated in large quantities at various enterprises. The analysis of phosphogypsum, which has been in the dumps for more than 5 years, showed that by its quality indicators it can be attributed to the 2nd grade in accordance with GOST 4013-2019, and the specific effective activity of the material (Aeff) corresponds to the I class of materials, which makes it suitable for the production of gypsum binders. Prototypes-cylinders were made from a mixture of phosphogypsum with lime dust of 1:1 composition at a pressure of 30 MPa and then subjected to hardening according to three schemes, in order to separate the passage of various types of hardening and study each of them for the physico-mechanical properties of the resulting material. The analysis of experimental data made it possible to establish the effectiveness of simultaneous flow in the system of two types of hardening – carbonate and hydration for lime and phosphogypsum components of the raw mixture, respectively. As a result of the organization of a mixed type of hardening of gypsum-lime binder, samples with a compressive strength of 26.5 MPa and a softening coefficient of 0.63 were obtained within 90 minutes. The calcium carbonate formed in the process, which is the product of the reaction between calcium hydroxide and carbon dioxide, significantly increases the water resistance of the hydration products of gypsum binder. It is established that with an optimal combination of technological factors and hardening conditions, a significant increase in the physical and mechanical characteristics of the carbonized material is possible in a short time.

scholarly journals Mineral Resource Base of Mostovskoy District

2021 ◽  
Vol 80 (6) ◽  
pp. 172-174
Author(s):  
Т.F. Bochko ◽  
V.E. Demitroshkina ◽  
S.N. Semenova
Keyword(s):  
Mineral Resource ◽  
Building Materials ◽  
Raw Materials ◽  
Mineral Waters ◽  
Resource Base ◽  
Literary Sources

The article presents data on the composition, reserves and extraction of raw materials for the production of building materials, as well as the reserves and use of thermal and mineral waters based on the analysis of maps, stock materials and literary sources.

Spatial Development as a Modernization Driver for the Republic of Kazakhstan

2012 ◽  
pp. 53-58
Author(s):  
S. Afontsev ◽  
N. Zubarevich
Keyword(s):  
Raw Materials ◽  
Spatial Development ◽  
Economic Diversification ◽  
Regional Economic ◽  
Analytical Scheme ◽  
Basic Goods ◽  
Challenges And Opportunities ◽  
The Republic

The questions of spatial development as a modernization driver (the Kazakhstan case) are considered in this article. The analysis of the regional economic differences makes possible to work out the development guidelines, based on the advantages combination of the basic goods specialization and the policy of transferring growth impulses from the raw materials sector to the industry and service ones. Current challenges and opportunities, which face the Kazakhstan economy, the questions of economic diversification drive up the importance of the connection between spatial development and the cluster priorities. The analytical scheme of macro-regions and diversification through the dynamic focal networks can settle up these challenges.

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