scholarly journals Modified bituminous binders for road construction in the Republic of Sakha (Yakutia)

2020 ◽  
Vol 7 (4) ◽  
Author(s):  
Tatyana Lazareva ◽  
Aleksey Parfenov
Keyword(s):  
Environmental Conditions ◽  
Experimental Studies ◽  
Road Construction ◽  
Softening Temperature ◽  
Thermoplastic Elastomers ◽  
Climatic Conditions ◽  
Materials Testing ◽  
Industrial Oil ◽  
National University ◽  
The Republic

Take into the account climate and environmental conditions of this region are necessary during modern road construction technologies introduction in the Republic of Sakha (Yakutia). This region’s climate and environmental conditions in many ways are identified as extreme. First of all, it should be noted that Yakutia is the coldest region of the Russian Federation, its territory is completely located in the permafrost zone. At the constructional materials testing center of the Pacific National University, were executed experimental studies to develop technological regulations for the modified bituminous binder manufacturing intended for paving the Lena highway (Yakutsk – Never). In this work, for the polymer-bitumen binder manufacturing, was used bitumen petroleum viscous for road building, grade BND 130/200. In the course of the research, the polymer-bitumen binders PBV 200 and PBV 300 with a brittle temperature not exceeding -35 °C and -40 °C with the thermoplastic elastomers SBS LG 502 (South Korea) and SBS R 30-00A (JSC «Voronezhsintezkauchuk») additives use the formula selecting problem were solved, as well as plasticizer – industrial oil I-40A. To optimize the composition of the binder and further improve its characteristics, it is proposed to use bitumen with increased content of maltene fractions and to include in its composition an adhesion additive of the amphoteric type DAD-1. The resulting polymer-bitumen binder is characterized by a wide performance range – an increased softening temperature and a low brittleness temperature, elasticity (ability to reversible deformations), high adhesion to various rocks. Achieving these goals will improve the asphalt concrete pavement quality and durability in difficult climatic conditions.

scholarly journals STUDIES OF BENDING ELEMENTS WITH FIBERGLASS FITTINGS IN HOT CLIMATIC CONDITIONS IN THE EXAMPLE OF THE REPUBLIC OF TAJIKISTAN

2020 ◽  
Vol 8 (4) ◽  
pp. 5-8
Author(s):  
Abdunazar Dadoboev
Keyword(s):  
Concrete Beams ◽  
Experimental Studies ◽  
Climatic Conditions ◽  
Strength Characteristics ◽  
The Republic ◽  
Composite Reinforcement

Features and comparative characteristics of metal and composite reinforcement are shown. Theoretical and experimental studies of the strength characteristics of concrete beams reinforced with fiberglass and metal reinforcement are presented. The use of fiberglass reinforcement can be economically efficient in the construction of brick buildings.

scholarly journals THE ROLE OF THE WELL WATERS OF THE MAUSOLEUM OF KHOJA AHMED YASAVI IN THE FORMATION OF SALTS

REPORTS ◽  
2020 ◽  
Vol 5 (333) ◽  
pp. 125-132
Author(s):  
А.D. Akbasova ◽  
◽  
N.P. Aubakirov ◽  
G.D. Anarbekova ◽  
G.А. Sainova ◽  
...  
Keyword(s):  
Building Materials ◽  
Salt Content ◽  
Experimental Studies ◽  
Calculated Data ◽  
Climatic Conditions ◽  
Water Evaporation ◽  
Anthropogenic Factors ◽  
Environmental Objects ◽  
The Republic ◽  
Well Waters

The work is devoted to the study of the chemical composition of well waters located on the territory of the mausoleum complex of Khoja Ahmed Yasavi. On the basis of experimental studies, the salinity of well waters increases every year. It is especially different in 2019 when, compared to the previous 10 years (2009-2018), there was a sharp increase in the total salt content by 1,5 times in the inner well and about 2,3 times in the outer well. The reason for this is the intense pollution of atmospheric air, soil, plants and other environmental objects due to an increase in the volume of construction work resulting from this waste, the number of servicing vehicles and the emergence of a number of new anthropogenic factors. The article also considers data from the Kazhydromet of the Republic of Kazakhstan that characterize changes in natural and climatic conditions, exactly, the amount of precipitation by month. Based on the calculated data, we have shown that water evaporation is 4-5 times higher than the amount of precipitation in the region. As a result of evaporation, moisture rises through the capillaries and is further saturated with salts found in building materials. Further, the formed saturated salt solution, undergoing various transformations, such as crystallization, contributes to the formation of salt deposits on the surface of the foundation materials and further walls. This negative phenomenon is one of the factors that lead to a decrease in the stability and safety of the architectural monument.

scholarly journals The combined irrigation of sweet pepper

2021 ◽  
Vol 843 (1) ◽  
pp. 012058
Author(s):  
S A Kurbanov ◽  
D S Magomedova
Keyword(s):  
Drip Irrigation ◽  
Land Reclamation ◽  
Irrigation System ◽  
Experimental Studies ◽  
Crop Productivity ◽  
Sweet Pepper ◽  
Climatic Conditions ◽  
Department Of Agriculture ◽  
The Republic ◽  
Growing Conditions

Abstract The advantages of drip irrigation of many agricultural crops are well known, but it does not allow to regulate the phytoclimate in the “environment-plant” system, which is especially important for the conditions of the hot and dry climate of the Republic of Dagestan. Currently, the efficiency of fine sprinkling on the background of drip irrigation was insufficiently studied, as questions remain the combined effect of irrigation on crop productivity in real climatic conditions on the effectiveness of combination with other agronomic techniques, etc. Experimental studies were conducted on the experimental field of the Department of Agriculture, Soil Science and Land Reclamation in the educational and experimental farm of the Dagestan State Agrarian University. The main purpose of the research was to determine the parameters of the combined irrigation technology, its effect on the microclimate of the irrigated field and the phytoclimate of plants, as well as the productivity of sweet pepper. As the result of experimental studies, it was found that the use of a combined irrigation system (drip irrigation + fine sprinkling) when cultivating sweet pepper allows to obtain an additional 9.4 t/ha of marketable products by optimizing the growing conditions.

scholarly journals Determinarea nivelului de rezistenţă a genotipurilor contra atacul bolilor principale a materialului genetic de ameliorare a culturilor leguminoase pe fonduri naturale şi artificiale de infecţie

2020 ◽  
Author(s):  
M. Lencautan ◽  
Keyword(s):  
Environmental Conditions ◽  
Genetic Material ◽  
Plant Productivity ◽  
Climatic Conditions ◽  
Basic Factor ◽  
Plant Improvement ◽  
Republic Of Moldova ◽  
Legume Crops ◽  
The Republic ◽  
Harmful Species

In the soil and climatic conditions of the Republic of Moldova, legume crops are attacked by a complex of harmful species, which present a danger in decreasing the level of plant productivity. To solve the problem of increasing the level of production, the basic factor is to estimate highly productive varieties (hybrids), adopted under stressful environmental conditions endowed with high levels of resistance to harmful pathogens can later be used in the process of plant improvement as initial genetic material.

CREDO RADON UA – INFORMATION MODEL FOR CALCULATION OF ROAD CONSTRACTION

2019 ◽  
pp. 34-42
Author(s):  
Volodymyr Karedin ◽  
Nadiya Pavlenko
Keyword(s):  
Design Process ◽  
Static Loading ◽  
Computer Aided Design ◽  
Experimental Studies ◽  
Construction Materials ◽  
Residual Deformation ◽  
Road Construction ◽  
Information Support ◽  
Existing Structures ◽  
Road Pavement

CREDO RADON UA software provides an automated calculation of the strength of the pavement structures of non-rigid and rigid types, as well as the calculation of the strengthening of existing structures. In the article, one can see the main features and functionality of the CREDO RADON UA software, the main points in the calculations according to the new regulations. Information support of the design process includes necessary databases, informational and helping materials that make up the full support of the pavement design process. The concept of CREDO RADON UA 1.0 software is made on the use of elasticity theory methods in calculations of initial information models of pavements. Performing optimization calculations, the roadwear in CREDO RADON UA is designed in such a way that no unacceptable residual deformation occurs under the influence of short-term dynamic or static loading in the working layer of the earth bed and in the structural layers during the lifetime of the structure. The calculation algorithms were made in accordance with the current regulatory documents of Ukraine. CREDO RADON UA software allows user to create information bases on road construction materials and vehicles as part of the traffic flow for calculations. The presented system of automated modeling makes it easier for the customer to control the quality of design solutions, to reasonably assign designs to layers of reinforcement, to quickly make comparisons of calculations of different designs for the optimal use of allocated funds. Prospects for further improvement of the program should be the results of theoretical and experimental studies on filling the databases, which are used as information support for automated design of road structures. Keywords: CREDO RADON UA, road, computer-aided design, repair project, road pavement, strengthening, construction, rigid pavement, elasticity module, a transport stream, calculation method, information support, dynamic or static loading.

Peculiarities of the course of the postpartum period in domestic reindeer females, its morphophysiology and behavioral reactions in the North-East of Russia (Republic of Sakha)

2020 ◽  
pp. 99-105
Author(s):  
V. Fedorov ◽  
E. Sleptsov ◽  
K. Plemyashov
Keyword(s):  
Postpartum Period ◽  
Reproductive Function ◽  
Complex Problem ◽  
Climatic Conditions ◽  
Taiga Zone ◽  
Behavioral Reactions ◽  
North East ◽  
The North ◽  
The Republic ◽  
Mountain Taiga

A growth in the number of deer and an increase in their productivity are closely related to the solution of the complex problem of reproduction and rational use of deer females. Significant damage to reindeer husbandry is caused by the barrenness of northern domestic deer, the level of which has been quite high in recent years. So, in the Republic of Sakha, on 01.01.2020, the number of domesticated reindeer was 152,068, of which female deer and heifers — 71,818, offspring per 100 females — 59, business yield amounted to 52 fawns per 100 females. The causes of infertility are very diverse, as the natural and climatic conditions of the breeding zones have a significant influence on the reproductive function of reindeer. In Yakutia, the main population of northern domestic deer is bred in mountain taiga and tundra natural-climatic zones, so there are about 55 thousand deer in the mountain taiga zone and more than 65 thousand deer in the tundra zone. In this regard, the study of the peculiarities of the postpartum period course in domestic reindeer females, its morphophysiology, and behavioral reactions depending on the natural and climatic conditions of breeding is of great importance.

Technological and Economic Aspects of Intensive Gardening Development in Russia

2020 ◽  
pp. 28-36
Author(s):  
L.A. Velibekova ◽  
◽  
Sh.M. Magomedgadgiev ◽  
Keyword(s):  
Climatic Conditions ◽  
Necessary Condition ◽  
Healthy Lifestyles ◽  
Current State ◽  
Nursery Management ◽  
The Russian Federation ◽  
The Republic ◽  
Further Development ◽  
Key Industry ◽  
Fruit Plantations

The article notes that the growing popularity of healthy lifestyles contributes to the increase in consumption of fruits and berries. At the same time, the analysis of the dynamics of the gardening industry for 2000-2018 shows that the problem of providing fresh fruits and berries to the population remains one of the most important. Based on actual data, linear and logarithmic models of time series of key industry indicators for the period 2010 – 2019 have been compiled. Calculations showed that in the Russian Federation as a whole the trend of reduction of sown areas of perennial fruit plantations will continue with growth of yield and gross fees. In this regard, the issues of distribution and introduction of gardens of intensive type are updated. An overview of the views of domestic scientists-gardeners on the concept of “intensive garden” is given. It has been established that the distribution of intensive gardens is possible only if there are favorable natural and climatic conditions and a developed scientific and production base of nursery management. The current state and problems of gardening in one of the leading regions – the Republic of Dagestan - are considered. A significant technological lag of region in the further development of intensive horticulture has been identified. Various directions of intensification process in horticulture as the main and necessary condition of growth of efficient and sustainable production are summarized.

scholarly journals The Perspective of Croatian Old Apple Cultivars in Extensive Farming for the Production of Functional Foods

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 708
Author(s):  
Boris Duralija ◽  
Predrag Putnik ◽  
Dora Brdar ◽  
Anica Bebek Markovinović ◽  
Sandra Zavadlav ◽  
...  
Keyword(s):  
Functional Foods ◽  
Geographical Location ◽  
Nutritional Composition ◽  
Climatic Conditions ◽  
Biologically Active ◽  
Biological Potential ◽  
Apple Cultivars ◽  
The Republic ◽  
Processed Form ◽  
Extensive Farming

The Republic of Croatia has a long tradition of fruit growing due to its geographical location, climatic conditions, and high quality of fruit crops, especially apple fruits. Apples can be used for the formulation of functional foods either in processed form (e.g., juice), or as a by-product (e.g., apple pomace). However, there is a growing demand for functional foods derived from ancient and traditional plant sources as they are recognized as a very valuable source of health-promoting bioactive ingredients. Similarly, old apple cultivars (Malus domestica Borkh.) are characterized by good morphological and pomological properties, less need for chemicals during cultivation and the higher share of biologically active compounds (BACs) with better sensory acceptability compared to commercial cultivars. However, their nutritional and biological potential is underestimated, as is their ability to be processed into functional food. The importance in preserving old apple cultivars can also be seen in their significance for improving the nutritional composition of other apple cultivars through innovative cultivation strategies, and therefore old local apple cultivars could be of great importance in future breeding programs.

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