scholarly journals FEATURES OF CONSTRUCTION AND TECHNOLOGY OF PANEL WOOD CONSTRUCTION ELEMENTS FOR JOINT-BUILDING PRODUCTS AND FURNITURE

2021 ◽  
Vol 11 (2) ◽  
pp. 91-98
Author(s):  
Tatyana Efimova ◽  
Tatyana Ishchenko ◽  
Maksim Posluhaev ◽  
Aleksandr Chernyshev
Keyword(s):  
Quality Indicators ◽  
Dimensional Stability ◽  
Climatic Conditions ◽  
Low Grade ◽  
Structural Elements ◽  
Design Rules ◽  
Building Products ◽  
Warranty Period ◽  
Wood Construction ◽  
Production Conditions

Each industrial enterprise, in order to increase the competitiveness of its products, must ensure such quality indicators as dimensional stability and maintainability during the entire warranty period. In practice, these indicators are ensured by observing the design rules. This problem is especially relevant in the design of joinery and construction and furniture products operated in variable climatic conditions. The purpose of the study was to establish the optimal technological chains for the production of re-adhesive structural elements; find the optimal sizes of lamellas, plots and assembly units for gluing; substantiate the expediency of veneering the glued elements with sawn veneer; design of products as a whole without the use of spikes and glue. All studies were carried out in real production conditions: at LLC Firm "Caucasian Forest", Republic of Adygea, Maikop district, settlement Tulsky and LLC HC "Mebel Chernozemya ", Voronezh. It is clear from the studies carried out that the technology of re-glued blanks allows several times to reduce warpage and increase the dimensional stability of structural elements; veneering operation allows rational use of low-grade wood in production

scholarly journals Moisture and Frost Resistance of the Recycled Base Rehabilitated with the Foamed Bitumen Technology / Odpornosc Na Oddziaływanie Wody I Mrozu Podbudowy W Technologii Recyklingu Z Asfaltem Spienionym

2012 ◽  
Vol 58 (2) ◽  
pp. 185-198 ◽  
Author(s):  
M. Iwanski ◽  
A. Chomicz-Kowalska
Keyword(s):  
Frost Resistance ◽  
New Technology ◽  
Physical And Mechanical Properties ◽  
Climatic Conditions ◽  
Specific Production ◽  
Central European ◽  
Road Pavement ◽  
Foamed Bitumen ◽  
Cold Recycling ◽  
Production Conditions

Abstract The technology of recycling with foamed bitumen is a new technology of road rehabilitation. Due to the climatic conditions in the Central European countries, road pavement structure should be moisture and frost resistant. Because of its specific production conditions, this is especially important for pavements rehabilitation with the cold recycling technology. Determining the physical and mechanical properties, as well as moisture and frost resistance, depends on binder and filler contents. They are the key elements before its use for road building. The tests presented here have been performed on mineral recycled base mixes with foamed bitumen. The material from the existing layers was used. The content of bitumen binder amounted to 2.0%, 2.5%, 3.0% and 3.5%, while that of cement to 1.0%, 1.5%, 2.0%, 2.5%. The results were subject to the optimization process. This allowed to state that with the use of 2.5% foamed bitumen and 2.0% of cement, the base had the required properties, as well as the moisture and frost resistance.

Material and Structural Properties for Creating High Performance Concrete Structures

2014 ◽  
Vol 629-630 ◽  
pp. 21-27
Author(s):  
György L. Balázs
Keyword(s):  
Structural Properties ◽  
Material Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Structural Elements ◽  
Design Rules ◽  
Existing Structures ◽  
New Codes ◽  
Specific Material

HPC and UHPC concretes are finding their ways both to new structures and to retrofitting of existing structures. Herein specific material properties as well as structural examples are discussed. New Codes and Recommendations provide description of material properties and design rules for HPC/UHPC structures and structural elements.

scholarly journals Atmospheric Air –the Effective Source of Low-Grade Thermal Energy for Heat Pump Snow Melting Systems under Climatic Conditions of Moscow

2015 ◽  
Vol 30 ◽  
pp. 05001 ◽  
Author(s):  
G.P. Vasilyev ◽  
V.A. Leskov ◽  
N.V. Mitrofanova ◽  
V.F. Gornov ◽  
M.V. Kolesova ◽  
...  
Keyword(s):  
Heat Pump ◽  
Thermal Energy ◽  
Climatic Conditions ◽  
Low Grade ◽  
Snow Melting ◽  
Atmospheric Air ◽  
Effective Source

The Study of Heat Consumption Systems of Buildings with Heat Pump

2016 ◽  
Vol 856 ◽  
pp. 297-302 ◽  
Author(s):  
Anna Tsynaeva ◽  
Katerina Tsynaeva
Keyword(s):  
Heat Source ◽  
Heat Pump ◽  
Heating System ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Heat Consumption ◽  
Low Grade ◽  
Consumption System ◽  
Low Grade Heat

Systems of heat consumption of the building with heat pump that uses low-grade heat source are investigated. Effectiveness of heat consumption systems with heat pump is concluded effective for severe climatic conditions prevailing in Russia. Characteristics of heat consumption system with heat pump and the traditional heating system are compared. In this case the heat pump is used the warmth of the environment, that is why considered operating conditions for the autumn and spring. Low inertia of heat systems with heat pump compared to traditional ones during autumn and spring proved.

scholarly journals NETWORK PLANNING OF THE TECHNOLOGICAL CHAIN FOR TIMBER LAND DEVELOPMENT

2021 ◽  
pp. 1-8
Author(s):  
Konstantin Rukomojnikov ◽  
Aleksandr Mokhirev ◽  
Albert Burgonutdinov ◽  
Olga Kunickaya ◽  
Roman Voronov ◽  
...  
Keyword(s):  
Network Planning ◽  
Land Development ◽  
Network Models ◽  
Climatic Conditions ◽  
Maximum Reduction ◽  
Managerial Decisions ◽  
Technological Chain ◽  
The Cost ◽  
Production Conditions ◽  
Climatic Features

Making managerial decisions when choosing a variant of the technological chain for logging is complicated by the variety of natural and climatic conditions. The climatic features of the periods affect the productivity of technological machines and the cost of implementation. This research suggests using network planning to determine the technological chain of timber land development. The purpose of the research is construction of multi-purpose network models for planning the technological chain of logging operations in various production conditions of forestry enterprises operation. These models are aimed at making it possible to conduct calculations to increase the efficiency of labour, materials, funds, equipment distribution with the maximum reduction in the cost of logged products. As a result of the analysis of possible options for technological chains, several network models for the implementation of logging technological processes have been built.

scholarly journals RECENT INVESTIGATIONS INTO COMPOSITE SWAY FRAMES

2004 ◽  
Vol 10 (1) ◽  
pp. 15-23
Author(s):  
Jean-François Demonceau ◽  
Jean-Pierre Jaspart
Keyword(s):  
Static Loading ◽  
Rotational Behaviour ◽  
Structural Elements ◽  
Design Code ◽  
Global Instability ◽  
Design Rules ◽  
Composite Frames ◽  
Theoretical Investigations ◽  
Key Aspects ◽  
Sway Frames

A modern design code for composite construction such as Eurocode 4 limits its scope to “non‐sway buildings” with efficient bracing systems. Therefore it gives mainly rules to analyse and to check structural elements like beams, columns, slabs and joints. However, in the last years, the construction of taller buildings and larger industrial halls without wind bracing systems is susceptible to make global instability a relevant failure mode, what is not yet covered by Eurocode 4. For three years, in the framework of a European research project funded by the European Community for Steel and Coal (ECSC), in which Liège University was deeply involved, intensive experimental, numerical and theoretical investigations have been carried out. The latter aimed at improving the knowledge in the field of sway composite frames and at developing appropriate design rules. The rotational behaviour of the beam‐to‐column composite joints is one of the key aspects of the problem to which a special attention has been paid. This paper presents numerical and analytical studies carried out at Liège University, as part of the above European project, with the objective to investigate the behaviour of 2D composite sway frames under static loading. Particular phenomena put into sight through different analyses are illustrated herein.

scholarly journals Productivity and Adaptive Properties of Spring Triticale in the Non-Chernozem Zone (Russia)

2019 ◽  
Vol 5 (4) ◽  
pp. 197-205
Author(s):  
A. Tyslenko ◽  
D. Zuev ◽  
S. Skatova
Keyword(s):  
Maximum Yield ◽  
Animal Husbandry ◽  
Kernel Weight ◽  
Climatic Conditions ◽  
Winter Rye ◽  
Structural Elements ◽  
Parental Form ◽  
Spring Triticale ◽  
Vladimir Region ◽  
Grain Crop

Spring triticale is a new grain crop created by the artificial crossing of winter rye with wheat. By productivity, biochemical qualities of grain, resistance to biotic and abiotic stresses exceed the initial parental form. In this regard, it is in great demand in animal husbandry non-Chernozem zone of the Russian Federation. The purpose of the work is to identify the spring triticale varieties adapted to the climatic conditions of the Vladimir region. Evaluation of the breeding material was carried out according to the Methodology of state variety testing of agricultural crops. As a result of a four-year study of 14 zoned recognized varieties and promising numbers, it has been established that the formation of their yields occurs mainly due to the number of productive haulm stands, grains and productivity of the ear, with a thousand–kernel weight. The yield of feed grain varied from 2.30 t/ha to 6.16 t/ha, depending on the climatic conditions of the year. A high correlation was established between the yield and the structural elements of the ear — the number of grains in the ear (+0.60±0.12), the mass of grain from the ear (+ 0.56±10); medium — with a mass of 1000 grains (+0.46±16). Short-growing varieties Amore, Dorofeya and Amigo showed a maximum yield index of 43 — 46.1%. Varieties of spring triticale Norman, Dobroe, Dorofeya and promising numbers no. 35, T-396 was the most adapted to the soil and climatic conditions of the zone and are recommended for cultivation in agricultural production.

scholarly journals BARLEY PRODUCTIVITY DEPENDING ON NUTRITION BACKGROUND AND SEEDING RATE

2019 ◽  
Vol 14 (3) ◽  
pp. 67-70
Author(s):  
Иван Таланов ◽  
Ivan Talanov ◽  
Лилия Каримова ◽  
Liliya Karimova
Keyword(s):  
Quality Indicators ◽  
Root Rot ◽  
Grain Quality ◽  
Plant Density ◽  
Barley Grain ◽  
Climatic Conditions ◽  
Farm Animals ◽  
Seeding Rate ◽  
Yield And Quality ◽  
High Feed

Barley is cultivated for food, technical and feed purposes. Barley grain is used for barley flour, pearl barley and a number of products, from which are prepared for our nutrition. In addition, it is used for the preparation of coffee substitutes, in the alcohol and brewing industries, has high feed qualities and is widely used as a concentrated feed for all types of farm animals, especially pigs. The results of studies showed that the dynamics of plant density and root rot damage were more influenced by planting rates, less than the estimated dose of fertilizers. The best nutritional regime and the maximum barley productivity (4.06 tons per hectare) with good grain quality indicators were obtained against the calculated nutritional background (4.0 tons per hectare) with a sowing rate of 5 mln. germinating seeds per 1 ha. The two-factor field experience with serial distribution of plots was laid on leached chernozem in LLC AF “Zay” of Zainsky district of the Republic of Tatarstan in 2013-2015. The purpose of the research was to study the biological characteristics of the variety and soil and climatic conditions for yield and quality indicators of barley grain. The objectives of our research were: to determine the effect of the seeding rate on the density of the stalk, damage to plants by root rot, the dynamics of plant nutrients, weediness of crops, yield and quality of barley grain. In the course of our studies, we found that the minimum value of barley grain quality indicators was observed against the background without fertilizers when sowing 5.5 million units per hectare: nature was 620 g/l, filmy 9.4%, germination 96.8%, the protein content of 11.9% and the extractivity of 77.0%, the maximum against this background was observed when sowing 4.0 million units per hectare. The barley grain quality indicators, grown against a calculated nutritional background, may well correspond to the brewing industry. The formation dynamics of plant densities and affection with their root rot had a greater influence on planting rates, and less calculated doses of fertilizers.

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