SYNTHESIS OF POROUS GLASS COMPOSITES BASED ON NATURAL SILICATE RAW MATERIALS OF THE ROSTOV REGION

2021 ◽  
pp. 87-92
Author(s):  
Lyubov Yatsenko
Keyword(s):  
Porous Glass ◽  
Raw Materials ◽  
Glass Composites ◽  
Rostov Region ◽  
Natural Silicate

EXPERIMENTAL INVESTIGATION OF THE DURABILITY OF LOAD BEARING TIMBER-GLASS COMPOSITES UNDER THE EFFECTS OF ACCELERATED AGING

2019 ◽  
Vol 14 (2) ◽  
pp. 45-59 ◽  
Author(s):  
Halet Almila Arda Buyuktaskin ◽  
Mehmet Serkan Yatagan ◽  
Gulseren Erol Soyoz ◽  
Leyla Tanacan ◽  
Morvarid Dilmaghani
Keyword(s):  
Raw Materials ◽  
Accelerated Aging ◽  
Structural Elements ◽  
Atmospheric Conditions ◽  
Aging Effects ◽  
Glass Composite ◽  
Load Bearing ◽  
Glass Composites ◽  
Before And After

Although timber was used extensively as a structural material for traditional buildings in Turkey in the past, usage of structural timber decreased significantly over time and timber has been largely replaced by other materials. As timber is a natural, durable and sustainable material, it would be desirable to re-introduce timber structural elements to contemporary construction in a form that is appealing to industry. Timber-glass composite structural elements are potentially a good candidate for this purpose. To that end, a series of tests were conducted on load-bearing timber-glass composites in order to understand the long–term structural performance of the composite material under atmospheric conditions; to decrease the recurring cost of repair and maintenance; and to minimize the exhaustion of raw materials and energy. In this paper, the first part of this experimental work is presented, which focuses on the durability of timber-glass composite under the effects of accelerated aging, carried out on small-sized timber-glass composite specimens. Accelerated aging effects were observed under wetting-drying, freezing-thawing, UV effects, resistance to acids and high temperature. The mechanical strength of the timber-glass composite specimens before and after the effect of accelerated aging was measured by adhesion and shear strength tests and a comparative analysis of the results was carried out. The results of the experiments indicate that timber-glass composite is suitable to be used under protection from environmental conditions.

Phase transition in NH4H2PO4: porous glass composites

2010 ◽  
Vol 83 (10-11) ◽  
pp. 909-916 ◽  
Author(s):  
T. Marciniszyn ◽  
R. Poprawski ◽  
J. Komar ◽  
A. Sieradzki
Keyword(s):  
Phase Transition ◽  
Porous Glass ◽  
Glass Composites

scholarly journals The technology of producing sorbents from linseed flax shive

2019 ◽  
Vol 20 (5) ◽  
pp. 517-525
Author(s):  
E. M. Puchkov ◽  
A. V. Galkin ◽  
I. V. Ushchapovsky
Keyword(s):  
Heavy Metals ◽  
Sorption Capacity ◽  
Raw Materials ◽  
Waste Recycling ◽  
Processing Waste ◽  
Bast Fiber ◽  
Federal Research ◽  
Rostov Region ◽  
Udmurt Republic ◽  
Disposal Problem

Flax processing waste, flax shive is of great importance for producing sorbents from non-wooden materials in Russia. There are more than 700 thousand hectares of linseed flax crops in the country. Linseed flax shive had been burned everywhere until recently as there was no technology of its processing. The waste disposal problem in the linseed flax cultivation regions could be solved by introducing new flax waste recycling and linen producing technologies developed by scientists of the Federal Research Center for Bast Fiber Crops. In 2015-2018 some studies were carried out in research laboratories and on the experi-mental plant of the center as well as on flax-sowing farms of the Udmurt Republic, Rostov region and Krasnodar territory. The research has shown that linseed shive contains 49-51% of cellulose and 23-27% of lignin, on which the sorption capacity of the material depends. The values of flax waste sorbent sorption capacity by the effective sorption of ions in relation to heavy metals are 85-91 %, to oil products - from 3.9 to 17.3 mg/g, to iodine and methylene blue - 222 and 220 mg/g, respectively. These values don’t concede the sorbents from wood and can replace the use of the latter. The developed technology of obtaining sorbent from flax allows to organize the production directly on flax-sowing farms and flax factories applying raw materials ready to use.

scholarly journals Assessment of anthropogenic pressure on the environment in Rostov region

2020 ◽  
Vol 210 ◽  
pp. 01004
Author(s):  
Alexander Khavanskiy ◽  
Vladimir Latun ◽  
Yuliya Merinova ◽  
Anastasiya Ivanchenko ◽  
Ludmila Nedoseka
Keyword(s):  
Rural Areas ◽  
Anthropogenic Impact ◽  
Raw Materials ◽  
Nature Management ◽  
Anthropogenic Pressure ◽  
Natural Resource Use ◽  
Rostov Region ◽  
Pressure Indicators ◽  
State Of The Environment ◽  
Official Data

Improvement of the methodology for determining the anthropogenic pressure on the region's environment, assessment of individual components and the total anthropogenic pressure, analysis of its formation and distribution in Rostov region. The main factors of anthropogenic impact on the environment are divided into four groups and presented in the form of demographic, industrial, agricultural and transport pressure, which, when summed up, give the total anthropogenic pressure. When determining certain types of anthropogenic pressure in the calculations, materials of statistical yearbooks and official data of regional reports on the state of the environment were used. For each type of anthropogenic pressure, indicators of anthropogenic impact and their numerical values were determined. The total anthropogenic pressure was determined by the sum of points. The features of the formation of anthropogenic pressure in Rostov region have been established. In cities with an industrial type of nature management, an increased and average anthropogenic pressure prevails. In rural areas of suburban urbanized zones and the development of mineral raw materials with an agrarian-industrial type of natural resource use, maximum indicators of environmental impact for agrarian areas, increased and average values of industrial, demographic and agricultural pressure have been established. Rural areas with an agrarian type, remote from industrial centers, are characterized by an increased agricultural pressure, lower and low values of the total pressure.

Negative thermal expansion in porous glass-ceramics based on Mg2Al2B2Si5O18 prepared from Saudi raw materials

2020 ◽  
Vol 34 (11) ◽  
pp. 4597-4604
Author(s):  
Samah S. Eldera ◽  
Reem Al-wafi ◽  
Omar A. Al Harbi ◽  
Christian Rüssel ◽  
Esmat M. A. Hamzawy
Keyword(s):  
Thermal Expansion ◽  
Porous Glass ◽  
Raw Materials ◽  
Negative Thermal Expansion ◽  
Glass Ceramics

ELECTRICAL CONDUCTIVITY AND PHASE TRANSITIONS IN KDP- AND ADP-POROUS GLASS NANOCOMPOSITES

2011 ◽  
Vol 01 (03) ◽  
pp. 337-343 ◽  
Author(s):  
A. SIERADZKI ◽  
A. CIZMAN ◽  
R. POPRAWSKI ◽  
T. MARCINISZYN ◽  
E. RYSIAKIEWICZ-PASEK
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Porous Glass ◽  
Porous Glasses ◽  
Glass Composites ◽  
Phase Transition Region ◽  
Dilatometric Studies ◽  
Proton Movement ◽  
Average Size

The results of dielectric and dilatometric measurements of ADP and KDP-porous glass composites are presented. We stated on dilatometric studies that in ADP-porous glass nanocomposites the phase transition temperature decreases with decreasing of average size of pores. The negative jump of volume at phase transition region in ADP-porous glasses is observed. It was found that for KDP embedded into porous glasses nonmonotonous dependence of phase transition temperature on pores sizes occurs. The conductivity of ADP/KDP composites is significantly higher than in bulk crystals. The obtained values of activation energies are typical for proton movement.

scholarly journals 1918: “Zero” German Armed Intervention of the Russian Don

2021 ◽  
pp. 141-155
Author(s):  
Olga M. Morozova ◽  
Keyword(s):  
Raw Materials ◽  
The State ◽  
Neutral Position ◽  
Contemporary History ◽  
State Archive ◽  
Historical Sources ◽  
Eastern Front ◽  
Rostov Region ◽  
Red Army ◽  
Armed Intervention

The internal situation in the Don region in 1918, during the intervention of armed units of the Austrian and German armies, has been overshadowed in the scholarship by two key phenomena: fates of the Volunteer Movement and formation of the quasi-state, All-Great Don Host. It is important to reconstruct the events that took place in the Don towns and villages in May–November 1918. Historical sources are scattered throughout archives and libraries. The author has used fonds of the State Archive of the Russian Federation, the State Archive of the Rostov Region, and the Center for Documentation on the Contemporary History of the Rostov Region. Austrian and German units that appeared on the borders of the Don region in early May 1918 engaged in combat only with the Red Army detachments. Cossacks and foreign troops fought together from the very beginning. In future, the German administration strove to organize uninterrupted supplies of industrial raw materials and products, food and fodder from the Don territory. In order to do this, the Germans occupied key control points and transport communications in the Western part of the region. A double government was introduced in the villages: alongside atamans there appeared German commandants. Re-election of Ataman P. N. Krasnov in August 1918 was ensured by the Germans; his most influential opponents were neutralized; censorship for the press was introduced. The Germans held a neutral position towards Russian officers and the Volunteer Army. The experience of intervention in the South of Russia influenced the fate of Germany, as German soldiers received a practical lesson in revolutionary action. Presence of the Central Powers’ troops in Russia forced the Entente countries to intervene more actively in the affairs of their former ally. Germany assumed that successful results of the armistice on the Eastern Front could be replicated on the Western Front.

scholarly journals Environmentally Sustainable Cement Composites Based on End-of-Life Tyre Rubber and Recycled Waste Porous Glass

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3289 ◽  
Author(s):  
Andrea Petrella ◽  
Rosa Di Mundo ◽  
Sabino De Gisi ◽  
Francesco Todaro ◽  
Claudia Labianca ◽  
...  
Keyword(s):  
End Of Life ◽  
Cement Paste ◽  
Porous Glass ◽  
Raw Materials ◽  
Compression Tests ◽  
Impact Compression ◽  
Environmentally Sustainable ◽  
Deep Groove ◽  
Complete Failure ◽  
Recycled Waste

In this paper, environmentally sustainable cement mortars were prepared with end-of-life tyre rubber (TR) and recycled waste porous glass (PG) as aggregates in order to obtain lightweight products characterized by renewable and not-pretreated materials specifically for indoor applications. The secondary raw materials were added as partial and/or total replacement of the conventional sand aggregate. The resulting lightweight specimens were characterized by rheological, mechanical, thermal, microstructural and wettability tests. Fine tyre rubber aggregates affected the cohesiveness of the composites, as opposite to coarse tyre rubber and porous glass. The flexural and the compressive strengths of the porous glass samples were higher than the tyre rubber samples because of the higher stiffness and good adhesion of the glass to the cement paste as observed by microstructural observations. On the contrary, an unfavorable adhesion of the tyre aggregates to the cement paste was observed, together with discrete cracks after failure without separation of the two parts of the specimens. The latter result can explain the best results obtained by tyre rubber mortars in the case of impact compression tests where the super-elastic properties of the elastomeric material were evidenced by a deep groove before complete failure. Moreover, the thermal conductivity decrease of the lightweight porous TR and PG composites was in the range of ~80–90% with respect to the sand-based samples, which suggests that they can be used as plasters and masonries, and, in the case of tyre rubber specimens, outside applications are not excluded as observed from the wettability tests.

scholarly journals Porous glass ceramic materials with decorative-protective coating

2021 ◽  
pp. 100-106
Author(s):  
Y.I. Koltsova ◽  
◽  
V.I. Ovcharenko ◽  
Keyword(s):  
Ceramic Material ◽  
Protective Coating ◽  
Porous Glass ◽  
Glass Ceramic ◽  
Raw Materials ◽  
Protective Layer ◽  
Glass Ceramic Material ◽  
Glass Cullet ◽  
Waste Products ◽  
Decorative Protective Coating

This study was aimed at producing a porous layered glass ceramic material with a decorative-protective coating via one-stage firing. Waste products were used as gas-forming agents to fabricate a glass ceramic material, which partially solves a problem of their utilization; available natural raw materials were also used as gas-forming agents. A decorative-protective coating was applied simultaneously with the formation of the main layers of the material. It consisted of glass cullet and various amounts of coloring oxide. Firing of the samples was carried out at the temperature of 7500С. The coating containing 99.9 wt.% of glass cullet and 0.1 wt.% of Cr2O3 with the thickness of 425 m and having a greenish color was stated to be the coating of the highest quality. As a result of the research, a three-layer porous glass ceramic material was obtained with a low coefficient of thermal conductivity (0.056 W m–1 K–1). The presence of a fourth front decorative-protective layer will allow using this material in construction as a heat-insulating and structural material without additional cladding.

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