bluuebunny/crossref_metadata_2025_split huggingface dataset:
Regression analysis of the calculation of the organizational and technological potential for the production of cold weather concreting
Authors: Lapidus Azariy , Khubaev Alan , Bidov Tembot 
Published: July 2020

Abstract
Concrete work in the winter and related organizational and technological decisions affect the efficiency of the construction project, both at the stage of technological design and at the stage of work. This work shows a review of research on organizational and technological solutions that affect the quality of monolithic structures in the construction of residential multistory buildings in the winter. We justified the choice of potential as the most optimal tool that will solve the problems posed in the study. We have identified the main regression coefficients for calculating the second-order regression equation. We performed data processing of production and technological modules and their correlation relationships identified in previous studies. The core matrix of the orthogonal central compositional plan is calculated. Variance of reproducibility has been determined. We have obtained the regression coefficients in this paper. We carried out the significance of these coefficients using the standard error. Further directions for the development of research into the potential of organizational and technological solutions for the production of concrete work in the winter were identified in this article. They were determined by determining the adequacy of this model.
The application of polypropylene fiber for reinforced concrete beams and slabs
Authors: Hiep Vu Hoang , Giang Do Truong , Tu Nguyen Trung 
Published: July 2020

Abstract
Currently there is no specific design standard for polypropylene (PP) fiber reinforced concrete structures. There are different conclusions on the bending strength of polypropylene fiber reinforced concrete structures. This paper presents some material properties of polypropylene fiber reinforced concrete. Based on the stress - strain state of the material, the stress diagram and the formula for calculation of the bending strength of the reinforced polypropylene fiber reinforced concrete with longitudinal bars structure were proposed. Bending strength of beams and slabs when using PP fiber were compared through examples and experiments.
A method of controlling thermal crack for mass concrete structures: modelling and experimental study
Authors: Le Hong-Ha , Vu Chi-Cong , Ho Ngoc-Khoa , Luu Van-Thuc 
Published: July 2020

Abstract
The control of the concrete temperature to prevent cracking can be viewed as principal goal in the design and construction of mass concrete. This paper researched on a novel technique for minimizing both the difference and the peak value of the temperature in mass concrete. Following this technique, the mass concrete is divided horizontally into two parts of different concrete mixtures but having the same strength grade. While the upper part is the normal heat concrete, the lower part can be considered as the low heat concrete which generate lower hydration heat than the upper part does. The influences of (i) concrete proportions of the layers; and (ii) thickness of the upper layer on the thermal behavior in mass concrete are two important aspects of the technique. Therefore, these two points represent important objectives of our present research. For this purpose, some numerical simulations with finite element method (FEM) and an in-situ experiment on a mass concrete block were performed. As a result, the simulated temperature field was validated by comparing with the experimental result and the principles of layers’ mixtures and thickness were drawn.
Construction of an axonometric outline of a curved surface of a part
Authors: Kravcova L I , Kostrubova I I 
Published: July 2020

Abstract
The article considers the geometric construction of the orthogonal isometry of a curved surface. To solve this problem, the authors propose to perform additional construction of the contour of the section of the surface in the orthogonal drawing and use the coordinates of the points of this section to construct an axonometric outline of the surface. The mismatch between the axonometric contour of the rotation surface and the corresponding contour of this surface in the projection drawing is illustrated. As a result, the proposed solution allows geometrically accurate construction of support and additional points of the axonometric contours of the revolution surfaces.
Composite low-water demand cements – one of the most promising and available technologies in terms of “Ecology” national project
Authors: Makarenko S V , Lozovskij B M , Khohryakov O V , Khozin V G , Baishev D I 
Published: July 2020

AbstractIn current article results of research of composite low-water demand cement (LWDC) based on Angarsk plant’s cement CEMII/A-F 32,5R, dump ash from TPP-10, marble powder from Sludjanskoj quarry and micro silica from LLC “Bratsk ferritic alloys plant” (Irkutsk region) are performed. Goal of the study is development of efficient ecology-friendly technology for high-quality cements with raw materials local to Irkutsk region. As a result of the study, technological, physical and mechanical properties of cement paste in fresh and hardened state were determined. Standard consistency W/B of LWDC-based cement pastes’ could be changed in range between 19 and 26%, and compressive strength of hardened cement paste can be variated from 22 to 60 MP. 2-stage 3-factor regressive analysis for compressive strength values of hardened cement paste at age 3,7,28 and after thermal curing was done, regression equations were obtained.
The using of liquid stone for the restoration and creation of copies of archaeological objects
Authors: Ya Mashovich A , Ruposov V L , Ineshin E M 
Published: July 2020

Abstract
It is an actual problem to investigate archaeological objects outside their native locations. New building materials make it possible to make the most realistic copy of archaeological objects, without destroying the object and extracting it from the natural environment. Liquid stone allows you to create objects with the imitation of color and texture of the original. This material can withstand high loads and it is used for prosthetics of the elements of archaeological structures. The technology of repetition of such objects allows making mass circulations of the most interesting archaeological objects. The technique makes it possible to restore objects from the remaining photos and description.
Thermodynamic calculations on system «Portland cement – water – carbon nanomodifier»
Authors: Smirnyagina N N , Tsyrenov B O , Urkhanova L A 
Published: July 2020

AbstractThe article presents the results of thermodynamic modelling in a cement-water-carbon nanomodifier system. A carbon nanomodifier contains fullerenes C60and C70. Thermodynamic calculations make it possible to evaluate the contribution of a carbon nanomodifier to the hydration process of Portland cement. Using thermodynamic calculations, changes in the phase composition and general properties of the system (total enthalpy, entropy) with the introduction of a carbon nanomodifier were determined.
Research of changes in the efficiency of renewable energy depending on external influences
Authors: Yu Shelekhov I , Smirnov E I 
Published: July 2020

Abstract
The article presents the results of a study of renewable energy sources (RES) based on solar panels, the operation of which took place in the Irkutsk region. The results of changing the efficiency of the solar panels depending on the use of light energy concentrators and the temperature of the panel itself are presented. The authors set the task of increasing the efficiency of the solar panels through the use of technical and constructive solutions.The experiments were carried out in the laboratory of IRNITU “Modern Heating Equipment”. For testing, we used a bench based on the TPM138 measuring regulator, an OVEN device of the IMS-F1.SH1 brand with a set of thermocouples., The subject of the study was two solar panels, on one of which a Fresnel lens was installed.The article formulates the purpose and objectives of the study, conducted research on the parameters of solar panels depending on the influence of the light energy concentrator and temperature changes on the panel itself, depending on external influences.As a result of the work, it was found that the efficiency of solar panels in the Irkutsk region in the summer period of time decreases by an average of 14.5%. And in the winter time by 7.5%. It is shown that to increase the efficiency of solar panels it is necessary to apply technical and constructive solutions that will reduce the payback period of solar engineering systems by 10-18%.
Schematic and structural optimization of group water supply systems
Authors: Chupin V R , Dushin A S 
Published: July 2020

Abstract
Group water supply systems (GWSS) are designed for centralized water supply of settlements located in waterless areas and remote from drinking water sources. GWSS are an object of increased attention, have a great social and environmental significance, require significant capital investments and financial resources for operation, ensuring the required reliability and manageability. Therefore, the issues of optimization of design solutions for the structure and parameters of structures are relevant and require improvement and development of methodological and software solutions to these problems. The paper proposes a method of redundant design schemes and a method of schematic and structural optimization based on a sequential and iterative solution of two problems: for a fixed value of flows in the graph of the redundant scheme, network parameters are optimized (pipeline diameters, heads, and the composition of pumping stations); with fixed network parameters, the problem of the distribution of water flows is solved in the GWSS.
Study of the possibility for reducing of environmental damage when the transition to alternative sources of heat supply systems in housing and communal services
Authors: Grebneva O , Lavygina O 
Published: July 2020

AbstractModern socio-economic conditions dictate increasingly stringent requirements for housing and communal infrastructure. When choosing a source of energy in heat supply systems, variants having maximum environmental efficiency are preferable. For an objective assessment of increasing of environmental safety degree, it is advisable to use a complex indicator that reflects the level of reduced environmental damage to the environment, in particular atmospheric air. In this work, the calculation of the prevented environmental damage for two types of fuel is made: natural gas and wood fuel (pellets). The calculation results showed when using natural gas instead of wood fuel for heat source that environmental and economic damage will be 64% less.
Justification of the parameters of developing water supply and sanitation systems based on their electronic models
Authors: Melekhov E S , Chupin R V 
Published: July 2020

Abstract
Most of the water supply and sanitation systems of modern cities and populated areas of the Russian Federation are characterized by significant physical depreciation, which is estimated at 60%., Significant moral depreciation, since some structures and pipelines are almost a hundred years old or more. At the same time, the replacement of old equipment is carried out annually at a rate of 2%. Such unsatisfactory rates of renovation are due to the lack of adequate funding and their irrational allocation to the construction of new ones, reconstruction and development of existing pipelines and structures. Obviously, to solve this problem, new and integrated approaches, new technologies for the design, construction and operation of water supply and sanitation systems are needed. One of such approaches is proposed in the work, based on digital technologies using electronic models of water supply and sanitation systems, on the basis of which methods for modeling operating modes and optimization methods for design solutions for the development of networks and structures have been developed. The results of applying the proposed technology on the example of water supply and sanitation in the city of Nizhneudinsk, Irkutsk region.
Using of the complex mobile station for heat and energy supply of residential villages, located on the protected areas
Authors: Tunik A A , Yu Tolstoy M 
Published: July 2020

Abstract
The results of studies of a complex mobile station for life support systems are presented. This station has the electric energy and thermal energy production functions, so as wastewater treatment and drinking water preparation. The production of electrical energy occurs through the conversion of solar energy and the use of microbial fuel cells. Thermal energy for the hot water system is obtained using solar collectors. A wastewater treatment plant is proposed based. The required number of complex mobile stations for life support systems, namely for wastewater treatment and hot water supply of the sports and recreation camp «Polytechnic», which is located at 17 km of the Baikal Highway, has been calculated. The calculations took into account the number of residents per season, water consumption and wastewater rate, the geographic location of the camp, the average number of cloudy days in the area and the number of sunny hours. The developed complex mobile station will ensure energy supply and disposal of wastewater from facilities located in recreational and protected areas without environmental consequences and violation of environmental and sanitary requirements. At the same time, the installation can be used on various types of objects.
Techniques for designing a mini house on a garden plot
Authors: Bolshakov A G 
Published: July 2020

AbstractThe problem is that comfortable housing is usually designed in such forms that make it inaccessible to people even with average incomes by russian standards. This leads to the task of reducing the volume and area of the house while maintaining the requirements for completeness of functions and architectural expressiveness. This social order is reinforced by the fact that the housing problem for people with middle and low incomes in Russia is solved in suburbia, on the territory of garden associations, where housing becomes an alternative to urban housing. The article solves the following problems: minimization of floor space, landscape-like architecture in conditions of a significant slope; development of expressiveness techniques for log cabins in combination with a wooden frame; architectonics of parts of a wooden building while ensuring maximum compactness.
Mathematical model of assessing urban planning decisions based on capital construction facilities location under the city plan
Authors: Zedgenizov A V , Solodkiy A I , Seliangin K V 
Published: July 2020

Abstract
The article deals with the issues of placing large focal points over the city planning map. The topicality of this issue is described. The target function is determined; it takes into account the time losses of road users in the zone of the focal point influence and the amount of payments to budgets of different levels generated by the focal point functioning. The mathematical model that allows estimating time losses of road users is presented. The model has a special focus on the mechanism of transport demand development and on the assessment of crossing capacity based on the intensity of priority flows. The mathematical tools are developed; they allow calculating the financial consequences of the implementation of urban planning projects set out in the city plan, choosing focal points with the most beneficial influence on the municipal budget among the proposed ones, taking into account the minimum negative impact of the chosen focal points on the adjacent street-and-road network. Some particular cases of the transport demand development are discussed, for example, those of traffic management schemes that do not allow left-turn and through movements at uncontrolled intersections. The recommendations on the practical application of the target function when making urban transport decisions having regional and city significance are developed.
Overcoming information asymmetry in the construction industry based on open and closed contractor activity data
Authors: Anokhov I 
Published: July 2020

Abstract
The purpose of the research is to find measures to reduce information asymmetry which significantly affects the relationship between customer and contractor, leading to higher prices for construction work and enhanced opportunism. Information asymmetry can make contractor and customer move away from direct contractual relations to more and more costly ways of interaction: legal, law enforcement and ethical. In the long run, the most effective level of interaction is ethical, as it significantly reduces information asymmetry as well as attendant costs. The article proposes two approaches to analyse asymmetry of contractor’s information: in the situation of limited access to internal information of a construction company and in the situation of maximum access to information of the activities of construction company’s individual departments. In the first approach, an assessment of price discrimination and changes in the cost of construction due to a deliberate deterioration in its quality is used. In the second approach, a set of indicators is considered, grouped by the functional levels of the contractor: physical, procurement, economic, technological and design.
Analysis of the Filatov model of the construction industry in the Baikal region
Authors: Filatov E A , Rudykh L G 
Published: July 2020

Abstract
In recent years, due to the slowdown in industrial development and the decline in the economic growth of the Russian Federation in trade and services, many companies from these activities in order to minimize their costs stop expanding production through new construction and at the same time freeze what they have started. In these conditions, managing the profitability of construction companies is one of the most important tasks for all levels of management: operational, tactical and strategic. Return on assets is the most important indicator of the efficiency of a commercial company, the main standard or average value in a market economy, with which individual indicators of companies are correlated to justify their competitiveness. The article suggests a way to manage the return on assets by decomposing the Filatov model (return on assets) into factors that reflect various aspects of the company’s activities. The object of the study is construction companies (construction of residential and non-residential buildings) in the Baikal region of the Russian Federation (Irkutsk region, Republic of Buryatia, Zabaikalsky Krai). The article presents the method No. 2 of integral analysis developed by Filatov E. A. The article was carried out within the framework of the scientific project of the Inc SB RAS no. XI.174.1.4 ‘Activation of the internal development potential of regions of resource specialization (on the example of the Baikal region)‘.
Legal regulation of construction quality and control
Authors: Guseva I A 
Published: July 2020

Abstract
The Institute of State Construction Supervision of urban planning legislation system occupies a key place in the matter of quality assurance of construction, that is a necessary condition for the safety of buildings under construction. The article gives a brief analysis of state architectural-building supervision mechanism of the RSFSR/USSR of Soviet period and developed processes of that period of time. By Decree of the Council of People’s Commissars of August 16, 1944 No. 1110 “On the State architectural-building Supervision”, the authorities (organizations) of architectural-building supervision were created. The main activity of GASK authorities was control functions in construction process, the Construction Norms and Regulations compliance, quality assurance, project solutions relevance, the correctness of capital investments. Analyzing the legal regulation of construction quality and control of Soviet period, the author notes that the political regime of the state does not affect the essence of the state construction supervision, but defines forms and implementation methods of it.
Organization of work on the development of measures to ensure the survivability of buildings exposed to flooding
Authors: Peshkov V V 
Published: July 2020

AbstractNowadays the issue of ensuring the survivability of buildings in emergency situations is relevant. Floods are one of the most frequent and serious types of natural disasters. Therefore, flood protection becomes an important task for cities, regions and countries that are exposed to the threat of flooding. Because along with human tragedies and damage to the national economy, floods cause the failure of Central supply points, on which the population is particularly dependent in an emergency. A methodological analysis of the results of flood response in the Irkutsk region in the affected areas has shown that there are number of issues related to the design construction and restoration of residential buildings in areas subject to natural emergencies. In order to solve these problems, theoretical generalizations of domestic and foreign experience are required, as well as the development of principles techniques and models of urban development placement in conjunction with technological solutions. Together, emergency response measures should have the properties of mobility, urbanization, and efficient use of the environment and resources in the implementation of investment and construction projects.
Winter city: staff training features
Authors: Peshkov V V 
Published: July 2020

AbstractThe education system is one of the most important social institutions, the qualitative state and the result of which determines the level of development of the economy, science and culture of the country as a whole. The problem of training and retraining of workers for the construction industry and housing and communal services is becoming increasingly important for the economy of the country. It is obvious that the necessary volume of housing can be introduced only with appropriate quantitative and qualitative provision of human resources to the construction industry, especially in regions with harsh climatic conditions. Construction organizations need highly qualified personnel. Investment in construction has always been profitable, as this sphere is growing rapidly. Meanwhile, the increase in construction does not automatically entail a tide of human resources into this sector of the economy. However, the analysis shows that the shortage of specialized personnel reduces the pace of construction, especially in regions with severe climates, because for such regions it is necessary to provide a different approach to training, which should provide the necessary set of competences for specialists.