База данных: Статьи
Страница 2, Результатов: 36
Отмеченные записи: 0
11.
Подробнее
65.291
B34
Beketova, K. N.
Corporate social responsibility and prospects for social project management of enterprices. [Текст] / K. N. Beketova, A. Sh. Abdimomynova // Bulletin of National Academy of Sciences of the Republic of Kazakhstan. - 2021. - №1. - P. 219-225
ББК 65.291
Рубрики: management
Кл.слова (ненормированные):
social reponsibility -- enterprise -- design -- external and internal environment -- risks
Аннотация: The concept of social responsibility is the result of the evolution of traditional views on the nature of management due to the assessment of the organization's activities impact on the external environment ; an approach that has shown its effectiveness and efficiency over decades of practice.
Держатели документа:
WKU
Доп.точки доступа:
Abdimomynova, A.Sh.
B34
Beketova, K. N.
Corporate social responsibility and prospects for social project management of enterprices. [Текст] / K. N. Beketova, A. Sh. Abdimomynova // Bulletin of National Academy of Sciences of the Republic of Kazakhstan. - 2021. - №1. - P. 219-225
Рубрики: management
Кл.слова (ненормированные):
social reponsibility -- enterprise -- design -- external and internal environment -- risks
Аннотация: The concept of social responsibility is the result of the evolution of traditional views on the nature of management due to the assessment of the organization's activities impact on the external environment ; an approach that has shown its effectiveness and efficiency over decades of practice.
Держатели документа:
WKU
Доп.точки доступа:
Abdimomynova, A.Sh.
12.
Подробнее
22.3
S22
Sarsembayeva, A.
Definition of the reconnection Rate of most powerful solar flares. [Текст] / A. Sarsembayeva, F. Belisanova, M. Odsuren, A. Sarsembay [и др.] // News of national academy of sciences of the republic of Kazakhstan. 2020. - №6. - P. 61-67
ББК 22.3
Рубрики: physics
Кл.слова (ненормированные):
solar flares -- X-rays -- reconnection rate
Аннотация: We made a brieft analysis of solar flares registered in there days, also has shown the duration of time and peak of solar flares in Universal time.
Держатели документа:
WKU
Доп.точки доступа:
Belisanova, F.
Odsuren, M.
Sarsembay, A.
Tutebayeva, A.
Orazymbet, A.
Abyshev, M.
S22
Sarsembayeva, A.
Definition of the reconnection Rate of most powerful solar flares. [Текст] / A. Sarsembayeva, F. Belisanova, M. Odsuren, A. Sarsembay [и др.] // News of national academy of sciences of the republic of Kazakhstan. 2020. - №6. - P. 61-67
Рубрики: physics
Кл.слова (ненормированные):
solar flares -- X-rays -- reconnection rate
Аннотация: We made a brieft analysis of solar flares registered in there days, also has shown the duration of time and peak of solar flares in Universal time.
Держатели документа:
WKU
Доп.точки доступа:
Belisanova, F.
Odsuren, M.
Sarsembay, A.
Tutebayeva, A.
Orazymbet, A.
Abyshev, M.
13.
Подробнее
39.5
S28
Sayakov, O.
3D aerodynamic analysis of awing with 2- way fluid-structure interaction. [Текст] / O. Sayakov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 129-134
ББК 39.5
Рубрики: Воздушный транспорт
Кл.слова (ненормированные):
NACA 23012 airfoil -- Fluid-Structure Interaction -- ANSYS -- strongly coupling study -- deformation of the wing
Аннотация: the aircraft wings facing different weather conditions start to deform and oscillate with an unpredictable velocity and amplitude. Most of the previous studies were conducted assuming the wing as a rigid body.However, the wing analysis with Fluid-Structure Interaction(FSI)has significant effectson the results. This paper compares the strongly coupled 2-way FSI analysisof the flexible wing with a geometry of NACA 23012and a rigid body 2D winganalysis. Both studies were carried out at a Mach number of 0.075 and Reynolds number of 0.6×106for different angles of attack.Moreover, the analysis of the wing deformation at the start of the flight is also presented. Finally, it was shownthat FSI analysis gives closer results to the experimental measurements, proving the worthiness of the extra efforts of the two-way FSI analysis
Держатели документа:
WKU
Доп.точки доступа:
Zhao, Y.
Mashekova, A.
S28
Sayakov, O.
3D aerodynamic analysis of awing with 2- way fluid-structure interaction. [Текст] / O. Sayakov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 129-134
Рубрики: Воздушный транспорт
Кл.слова (ненормированные):
NACA 23012 airfoil -- Fluid-Structure Interaction -- ANSYS -- strongly coupling study -- deformation of the wing
Аннотация: the aircraft wings facing different weather conditions start to deform and oscillate with an unpredictable velocity and amplitude. Most of the previous studies were conducted assuming the wing as a rigid body.However, the wing analysis with Fluid-Structure Interaction(FSI)has significant effectson the results. This paper compares the strongly coupled 2-way FSI analysisof the flexible wing with a geometry of NACA 23012and a rigid body 2D winganalysis. Both studies were carried out at a Mach number of 0.075 and Reynolds number of 0.6×106for different angles of attack.Moreover, the analysis of the wing deformation at the start of the flight is also presented. Finally, it was shownthat FSI analysis gives closer results to the experimental measurements, proving the worthiness of the extra efforts of the two-way FSI analysis
Держатели документа:
WKU
Доп.точки доступа:
Zhao, Y.
Mashekova, A.
14.
Подробнее
32.973
Y45
Yerassyl, K.
Sentiment analysis of Kaspi product reviews. [Текст] / K. Yerassyl // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №5. - P. 68-73
ББК 32.973
Рубрики: information Technology
Кл.слова (ненормированные):
sentiment analysis -- classification -- text analysis -- reviews -- data collection
Аннотация: Customer reviews are the key to the success functionality for the companies. A producer will gain the true result of his products from the customer feedback. What should the seller do to achieve good quality for his product? Just by looking at the stars and reading the usual text, the seller will not be able to improve their product well enough, because different people can understand the same text in different ways. That’s why, the seller can improve the wrong part of their product and make their product worse. Sentimental analysis can be applied here. He can make necessary changes to his product according to the feedback. However, it is common to see when most client may inadequately overestimate or underestimate the mark. To avoid the confusion, it is better to analyze the text. This paper focus on the sentiment feedback analysis and finding the relationship between reviews and ratings on the basis of data collected from ”Kaspi.kz” marketplace. These data streams are cleaned and analyzed and reviews is got through opinion mining. We used several algorithms to find the best one. The experiments have shown 92% accuracy in the sentimental analysis
Держатели документа:
WKU
Доп.точки доступа:
Akhmetov, I.
Jaxylykova, A.
Y45
Yerassyl, K.
Sentiment analysis of Kaspi product reviews. [Текст] / K. Yerassyl // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №5. - P. 68-73
Рубрики: information Technology
Кл.слова (ненормированные):
sentiment analysis -- classification -- text analysis -- reviews -- data collection
Аннотация: Customer reviews are the key to the success functionality for the companies. A producer will gain the true result of his products from the customer feedback. What should the seller do to achieve good quality for his product? Just by looking at the stars and reading the usual text, the seller will not be able to improve their product well enough, because different people can understand the same text in different ways. That’s why, the seller can improve the wrong part of their product and make their product worse. Sentimental analysis can be applied here. He can make necessary changes to his product according to the feedback. However, it is common to see when most client may inadequately overestimate or underestimate the mark. To avoid the confusion, it is better to analyze the text. This paper focus on the sentiment feedback analysis and finding the relationship between reviews and ratings on the basis of data collected from ”Kaspi.kz” marketplace. These data streams are cleaned and analyzed and reviews is got through opinion mining. We used several algorithms to find the best one. The experiments have shown 92% accuracy in the sentimental analysis
Держатели документа:
WKU
Доп.точки доступа:
Akhmetov, I.
Jaxylykova, A.
15.
Подробнее
32.973
M23
Mamyrbayev, O. Zh.
Realization of online systems for automatic speech recognition. [Текст] / O. Zh. Mamyrbayev, D. O. Oralbekova, K. Alimhan, M. Othman, B. Zhumazhanov // News of national academy of sciences of the republic of Kazakhstan. - 2021. - №6. - P. 66-72
ББК 32.973
Рубрики: information Technology
Кл.слова (ненормированные):
automatic speech recognition -- monotonic chunkwise attention -- neural transducer -- RNN-T -- end-to-end
Аннотация: This article provides a detailed overview of popular online-based models for E2Esystems such as RNN-T, Neural Transducer (NT), Monotonic Chunkwise Attention (MoChA). Systems based on these models have been trained to recognize Kazakh speech. The results obtained showed that all three models work well for recognizing Kazakh speech without the use of external additions
Держатели документа:
WKU
Доп.точки доступа:
Oralbekova, D.O.
Alimhan, K.
Othman, M.
Zhumazhanov, B.
M23
Mamyrbayev, O. Zh.
Realization of online systems for automatic speech recognition. [Текст] / O. Zh. Mamyrbayev, D. O. Oralbekova, K. Alimhan, M. Othman, B. Zhumazhanov // News of national academy of sciences of the republic of Kazakhstan. - 2021. - №6. - P. 66-72
Рубрики: information Technology
Кл.слова (ненормированные):
automatic speech recognition -- monotonic chunkwise attention -- neural transducer -- RNN-T -- end-to-end
Аннотация: This article provides a detailed overview of popular online-based models for E2Esystems such as RNN-T, Neural Transducer (NT), Monotonic Chunkwise Attention (MoChA). Systems based on these models have been trained to recognize Kazakh speech. The results obtained showed that all three models work well for recognizing Kazakh speech without the use of external additions
Держатели документа:
WKU
Доп.точки доступа:
Oralbekova, D.O.
Alimhan, K.
Othman, M.
Zhumazhanov, B.
16.
Подробнее
28
K42
Khalmurzayeva, B. A.
Biochemical indicators and application of Cyanobacteria Spirulina Microalgae in the cattle feedstuff. [Текст] / B. A. Khalmurzayeva, B. Sh. Ismailkhodjaev, K. P. Kuatbekova, R. S. Alibekov [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 80-88
ББК 28
Рубрики: Biology
Кл.слова (ненормированные):
antioxidants -- biologically active substances -- cultivation -- genus -- microalgae -- phyto-cultures -- Spirulina
Аннотация: The qualitative and quantitative compositions of the valuable biologically active substances, species and strains of microalgae are related the genus of CyanobacteriaSp.platensis and Sp.labgrinthifosmis that were isolated from local nature and grown in semi-production facilities were considered. In order to adapt for mass cultivation, algae were first grown in greenhouse conditions. The algae were cultivated within 12 days. The produc-tivity in the tubular cultivator with stirring of Sp.platensis was 3.8 g / l, protein (73.0%), and Sp.laberinthiformis was 2.6 g / l of protein (63.1%). Similar studies were carried out in the open-air conditions that showed an increase in the amount of illumination causes a significant restructuring of the entire photosynthetic apparatus of algae. The accumulation of Sp.labyrinthiformis 2.7 g / l a.d.c., protein 62.21%, and Sp.platensis 4.08 g / l, protein 75.3%, were within 10 days. The content of protein and carotenes sharply increases in comparison with the greenhouse conditions. It was found that the addition of Sp.platensis suspension, as a protein-vitamin supplement for the bulls’ feedstuff, stimulates physiological processes that improves the biochemical parameters of their blood, the digestibility coefficient of nutrients by 8-9%, positive mineral balance, increases live weight gain (17.4%) and slaughter yield of the bulls (3.6%). So, the suspension of Sp.platensis is recommended for use as a protein-vitamin supplement in livestock farms that will allow having a significant economic effect in livestock farming, in average 20-25% profits per yearly.
Держатели документа:
WKU
Доп.точки доступа:
Ismailkhodjaev, B. Sh.
Kuatbekova, K. P.
Alibekov, R. S.
Makhatova, A. I.
Meimanbaeva, S. S.
K42
Khalmurzayeva, B. A.
Biochemical indicators and application of Cyanobacteria Spirulina Microalgae in the cattle feedstuff. [Текст] / B. A. Khalmurzayeva, B. Sh. Ismailkhodjaev, K. P. Kuatbekova, R. S. Alibekov [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 80-88
Рубрики: Biology
Кл.слова (ненормированные):
antioxidants -- biologically active substances -- cultivation -- genus -- microalgae -- phyto-cultures -- Spirulina
Аннотация: The qualitative and quantitative compositions of the valuable biologically active substances, species and strains of microalgae are related the genus of CyanobacteriaSp.platensis and Sp.labgrinthifosmis that were isolated from local nature and grown in semi-production facilities were considered. In order to adapt for mass cultivation, algae were first grown in greenhouse conditions. The algae were cultivated within 12 days. The produc-tivity in the tubular cultivator with stirring of Sp.platensis was 3.8 g / l, protein (73.0%), and Sp.laberinthiformis was 2.6 g / l of protein (63.1%). Similar studies were carried out in the open-air conditions that showed an increase in the amount of illumination causes a significant restructuring of the entire photosynthetic apparatus of algae. The accumulation of Sp.labyrinthiformis 2.7 g / l a.d.c., protein 62.21%, and Sp.platensis 4.08 g / l, protein 75.3%, were within 10 days. The content of protein and carotenes sharply increases in comparison with the greenhouse conditions. It was found that the addition of Sp.platensis suspension, as a protein-vitamin supplement for the bulls’ feedstuff, stimulates physiological processes that improves the biochemical parameters of their blood, the digestibility coefficient of nutrients by 8-9%, positive mineral balance, increases live weight gain (17.4%) and slaughter yield of the bulls (3.6%). So, the suspension of Sp.platensis is recommended for use as a protein-vitamin supplement in livestock farms that will allow having a significant economic effect in livestock farming, in average 20-25% profits per yearly.
Держатели документа:
WKU
Доп.точки доступа:
Ismailkhodjaev, B. Sh.
Kuatbekova, K. P.
Alibekov, R. S.
Makhatova, A. I.
Meimanbaeva, S. S.
17.
Подробнее
35
A44
Altayeva, A.
Study of gold extraction from stale tailings by agitation leaching. [Текст] / A. Altayeva, B. N. Surimbayev, L. S. Bolotova, Zh. Т. Bagasharova, Sh. K. Akilbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 89-94
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
stale tailings -- stale tailings of the processing plant -- leaching -- technogenic mineral formations -- gold
Аннотация: The object of research is technogenic mineral formations-tailings of the Bestube processing plant located within the Bestube gold field. Analytical and technological studies of stale tailings have been carried out. According to the results of analytical studies, the material composition of stale tails was established. The average gold content in stale tailings according to assay analyses is 0.565 g/t, silver 1.56 g/t. The tailings belong to the category of poor sulfide, oxidized raw materials. The main industrially valuable component in the tailings is gold, silver has a subordinate value, and other metals are not of industrial value. Mineralogical analysis established that stale tails are represented by quartz, muscovite, clinochlore, albite, dolomite. Studies were conducted on agitation leaching of stale tailings of the initial size (64.08% of the class –0.074 mm) and after additional grinding to the size of 90% of the class –0.074 mm. Reducing the size contributes to the dissolution of gold from the tailings: at the initial size, 66.28% of gold is dissolved, after regrinding the degree of dissolution of gold from the tailings increases to 87.23%. The results of research on agitation leaching of gold have shown a high efficiency of hydrometallurgical technology for processing stale tailings of a processing plant.
Держатели документа:
WKU
Доп.точки доступа:
Surimbayev, B. N.
Bolotova, L. S.
Bagasharova, Zh. Т.
Akilbekova, Sh. K.
A44
Altayeva, A.
Study of gold extraction from stale tailings by agitation leaching. [Текст] / A. Altayeva, B. N. Surimbayev, L. S. Bolotova, Zh. Т. Bagasharova, Sh. K. Akilbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 89-94
Рубрики: chemical Technology
Кл.слова (ненормированные):
stale tailings -- stale tailings of the processing plant -- leaching -- technogenic mineral formations -- gold
Аннотация: The object of research is technogenic mineral formations-tailings of the Bestube processing plant located within the Bestube gold field. Analytical and technological studies of stale tailings have been carried out. According to the results of analytical studies, the material composition of stale tails was established. The average gold content in stale tailings according to assay analyses is 0.565 g/t, silver 1.56 g/t. The tailings belong to the category of poor sulfide, oxidized raw materials. The main industrially valuable component in the tailings is gold, silver has a subordinate value, and other metals are not of industrial value. Mineralogical analysis established that stale tails are represented by quartz, muscovite, clinochlore, albite, dolomite. Studies were conducted on agitation leaching of stale tailings of the initial size (64.08% of the class –0.074 mm) and after additional grinding to the size of 90% of the class –0.074 mm. Reducing the size contributes to the dissolution of gold from the tailings: at the initial size, 66.28% of gold is dissolved, after regrinding the degree of dissolution of gold from the tailings increases to 87.23%. The results of research on agitation leaching of gold have shown a high efficiency of hydrometallurgical technology for processing stale tailings of a processing plant.
Держатели документа:
WKU
Доп.точки доступа:
Surimbayev, B. N.
Bolotova, L. S.
Bagasharova, Zh. Т.
Akilbekova, Sh. K.
18.
Подробнее
24
A99
Azimbayeva, G. E.
Gas Chromatographic analysis of the chemical composition of ethyl alcohol obtained from plants of the genus asteraceae. [Текст] / G. E. Azimbayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 6-13
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
Ethyl alcohol -- plants of the genus Asteraceae -- gas chromatographic method -- chromatogram -- chemical composition
Аннотация: The article discusses the methods of obtaining and application of ethyl alcohol. The results of the analysis of the chemical composition of ethyl alcohol obtained from plants of the genus Asteraceae are presented. As a result of the study, alcohols were obtained in different concentrations. The chemical composition of ethyl alcohol was determined by gas chromatography. The impurity composition of ethyl alcohol obtained from various types of raw materials is also shown.
Держатели документа:
WKU
Доп.точки доступа:
Kamysbayeva, A.K.
Bakibaev, Abdigali
A99
Azimbayeva, G. E.
Gas Chromatographic analysis of the chemical composition of ethyl alcohol obtained from plants of the genus asteraceae. [Текст] / G. E. Azimbayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 6-13
Рубрики: chemistry
Кл.слова (ненормированные):
Ethyl alcohol -- plants of the genus Asteraceae -- gas chromatographic method -- chromatogram -- chemical composition
Аннотация: The article discusses the methods of obtaining and application of ethyl alcohol. The results of the analysis of the chemical composition of ethyl alcohol obtained from plants of the genus Asteraceae are presented. As a result of the study, alcohols were obtained in different concentrations. The chemical composition of ethyl alcohol was determined by gas chromatography. The impurity composition of ethyl alcohol obtained from various types of raw materials is also shown.
Держатели документа:
WKU
Доп.точки доступа:
Kamysbayeva, A.K.
Bakibaev, Abdigali
19.
Подробнее
35
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
20.
Подробнее
38.3
S70
Sokolova, Ya. А.
The study of the properties and structure of cement binding composition on electrolyte acqueous solutions activated by mechanomagnetic method. [Текст] / Ya. А. Sokolova, M. V. Akulova, B. R. Isakulov, А. G. Sokolova [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 86-91
ББК 38.3
Рубрики: Строительные материалы
Кл.слова (ненормированные):
Cement compositions, -- mechanomagnetic activation -- electrolyte aqueous solutions -- differential thermo gravimetric analysis -- compressive strength -- structure formation of binders -- sodium thiosulphate -- calcium chloride
Аннотация: In the present paper, the issues of studying the influence of complex activation of grouting fluid on the structure and properties of the hardened cement paste and concrete are considered. The problem is relevant for manufacturing of building materials. In the paper, there was used the method of applying in the concrete mix composition of the elementary chemical substances undergone special physical treatment by means of mechanomagnetic activation. For more profound study of the structure formation processes in the hardened cement paste, the method of differential thermo gravimetric analysis has been used. As the research results have shown, the concrete samples on the activated electrolyte solutions are characterized by improved strength. In addition, on the base of differential thermo gravimetric analysis, it was proven that in the studied samples of the hardened cement paste on the electrolyte solutions activated by the method of mechanomagnetic treatment, the less calcium hydroxide and the more hydrated calcium silicate with amorphous and fine crystalline is formed. The obtained results for cement composites could be applied when manufacturing effective binder for concretes and mortars in the production of building materials and structures.
Держатели документа:
WKU
Доп.точки доступа:
Akulova, M.V.
Isakulov, B.R.
Sokolova, А.G.
Kul’sharov, B.B.
Isakulov, А.B.
S70
Sokolova, Ya. А.
The study of the properties and structure of cement binding composition on electrolyte acqueous solutions activated by mechanomagnetic method. [Текст] / Ya. А. Sokolova, M. V. Akulova, B. R. Isakulov, А. G. Sokolova [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 86-91
Рубрики: Строительные материалы
Кл.слова (ненормированные):
Cement compositions, -- mechanomagnetic activation -- electrolyte aqueous solutions -- differential thermo gravimetric analysis -- compressive strength -- structure formation of binders -- sodium thiosulphate -- calcium chloride
Аннотация: In the present paper, the issues of studying the influence of complex activation of grouting fluid on the structure and properties of the hardened cement paste and concrete are considered. The problem is relevant for manufacturing of building materials. In the paper, there was used the method of applying in the concrete mix composition of the elementary chemical substances undergone special physical treatment by means of mechanomagnetic activation. For more profound study of the structure formation processes in the hardened cement paste, the method of differential thermo gravimetric analysis has been used. As the research results have shown, the concrete samples on the activated electrolyte solutions are characterized by improved strength. In addition, on the base of differential thermo gravimetric analysis, it was proven that in the studied samples of the hardened cement paste on the electrolyte solutions activated by the method of mechanomagnetic treatment, the less calcium hydroxide and the more hydrated calcium silicate with amorphous and fine crystalline is formed. The obtained results for cement composites could be applied when manufacturing effective binder for concretes and mortars in the production of building materials and structures.
Держатели документа:
WKU
Доп.точки доступа:
Akulova, M.V.
Isakulov, B.R.
Sokolova, А.G.
Kul’sharov, B.B.
Isakulov, А.B.
Страница 2, Результатов: 36