75504 2712-8172 2 54 2015 1-131

UNK RUS 4-5 Peter the Great Saint Petersburg Polytechnic University Yakubson Vera engstroy@inbox.ru

Polytechnicheskay, 29

Prospects of metal as a construction material March, 18-23, in Saint-Petersburg the annual exhibition “Interstroyexpo” took place. For the first time the event was held in new complex “ExpoForum”. On March, 18th, in the limits of the exhibition a conference “Modern practices in using of fabricated metals in residential construction. New potential for fabricated metals industry” took place. The event was organized by Steel Construction Development Association. 10.5862/MCE.54.1 cfabricated metal metal frame steel construction Interstroyexpo https://engstroy.spbstu.ru/article/2015.54.1/ 01.pdf

RAR RUS 6-17 Perm National Research Polytechnic University Chernyi K. chernyy_k@mail.ru Perm National Research Polytechnic University Fainburg G. faynburg@mail.ru Experience in usage of sylvinite blocks and panels for “vital rooms” and main parameters of indoor air quality The technological boom of the building industry has resulted in a practically unlimited diversity of new materials. Various contaminants often emanate from these building materials in the indoor environment. As a result, the indoor and outdoor air quality becomes more diverged. The known way to keep qualitative, up to curative indoor air is to use of materials from sawn, pressed, melded structures (blocks and plates) from natural sylvinite. These natural original materials used on surfaces, floors and ceilings of rooms generate small ions and ultrafine salt aerosol particles. Based on characteristics of ionizing radiation of natural radionuclide 40K the parameters of the air ion formation are analyzed and the effective ionization areas are calculated. The main requirements for the placement of active finishing or decorative elements made of sylvinite plates or blocks are defined. The measurement data for small ion concentration and fine aerosol in rooms decorated by potassium salt is presented. Mobility distribution of air ions generated by potassium salt plates and that of natural ions are compared. As a superposition of multiple log-normal distributions the values of size aerosol distribution are calculated. Depending on the relative humidity the modification of size distributions of aerosol particles is submitted. The results of these investigations and the recommendations for application of special building materials based on sylvinite salts to create “vital air rooms” provide real ways for achieving healthy, pure and healing air inside buildings. 10.5862/MCE.54.2 sylvinite blocks salt plates facing small air ions salt aerosol https://engstroy.spbstu.ru/article/2015.54.2/ 02.pdf

RAR RUS 18-32 Volgograd State University of Architecture and Civil Engineering Koshkarev S. cool.koshka12@mail.ru Volgograd State University of Architecture and Civil Engineering Azarov V. kaf_bgdvt@mail.ru Evaluation of wet dust separator effectiveness in the dedusting of emissions from expanded clay kiln This paper describes a way of reducing pollutant dust emissions exhausted in the atmosphere when manufacturing expanded clay by applying high effective wet dust cleaners with a combined scheme of dust separation from the gas flow within dust aspiration systems. Brief description of technological processes and devices and related major sources of emissions and discharges of pollutants into the atmosphere in the expanded clay’s producing is provided. An industrial survey of a representative sample of aspiration systems and enterprises producing granular clay pellets using dust precipitators within those systems is given. The main results of the dispersed analysis of variance dimension’s particle of expanded clay dust stemming and exhausting from the kilns are presented. The expediency to develop new, more efficient structure of precipitators for gas flow aspiration system in the production of expanded clay is justified. This new wet dust cleaner cuts dust emissions from the expanded clay gravel into atmosphere. Experimental research and evaluation of the leakage’s degree of dust particles meant as an outlet exhaust coefficient for the elaborated wet dust cleaner have been done. Treatment dependence of the outlet exhaust coefficient was obtained in the regression dependence as a function of several parameters for this wet dust precipitator. 10.5862/MCE.54.3 dust cleaning separation dust clay dispersed analysis of variance emissions of pollutants atmosphere schemes of dust separation wet dust cleaning apparatus https://engstroy.spbstu.ru/article/2015.54.3/ 03.pdf

RAR RUS 33-45 Peter the Great Saint Petersburg Polytechnic University Dudin Maksim maxim6892@yandex.ru

Polytechnicheskay, 29

M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru

Polytechnicheskay, 29

7801686579 0000-0001-7011-8213 Peter the Great Saint Petersburg Polytechnic University Barabanschikov Yuri ugb@mail.ru

Polytechnicheskay, 29

Modeling a set of concrete strength in the program ELCUT at warming of monolithic structures by wire Monolithic construction in winter faces problems of developing concrete strength at the negative ambient temperature. In order to provide the required temperature conditions for concrete curing and hardening builders use different methods to warm structures. One way is to use heating wire. The relevance of the paper is due to the climatic conditions of construction in most parts of Russia and the lack of a uniform methodology for calculating the required output of warm by heating wire. The paper discusses various guidelines for thermal curing of concrete. Modeling of warming up concrete in monolithic construction by heating wire has been done in ELCUT and WinConcret. A set of concrete strength has been calculated and temperature fields in the overlapping section have been analyzed. The problem of thermal deformation of concrete was solved. 10.5862/MCE.54.4 winter concreting heating wire ELCUT modeling of warming thermal deformations development of strength monolithic construction https://engstroy.spbstu.ru/article/2015.54.4/ 04.pdf

RAR RUS 46-55 Republican Unitary Research Enterprise for Construction "Institute BelNIIS" Krutilin Anton ankr@tut.by Republican Unitary Research Enterprise for Construction "Institute BelNIIS" Rykhlionak Yulia office_3.1@tut.by Belarusian National Technical University Liashkevich Vladimir leszkiewiczvv@gmail.com Thermophysical characteristics of low density autoclaved aerated concrete and their influence on durability of exterior walls of buildings The paper presents the results of experimental studies of thermophysical characteristics of autoclaved aerated concrete with density of 400 and 500 kg/m3 . The dependence of thermal conductivity on temperature and humidity was determined. The boundary humidities were set for which ice is either not formed or its amount is negligible in the pores of the materials at the temperature below zero. The new method of non-isothermal liquid transport coefficient determination was suggested. It was found that one of the basic mechanisms of moving water for cellular concrete samples with a moisture content over 30 % by weight is non-isothermal liquid transport. The effect of humidity on durability of exterior walls is estimated according to cellular concrete frost-resistance tests. 10.5862/MCE.54.5 aerated concrete thermal conductivity non-isothermal liquid transport durability https://engstroy.spbstu.ru/article/2015.54.5/ 05.pdf

RAR RUS 56-62 Tomsk State University of Architecture and Building Steshenko Aleksei steshenko.alexey@gmail.com Tomsk State University of Architecture and Building Kudyakov Aleksandr kudyakow@mail.tomsknet.ru Early structure formation of foam concrete mix containing modifying admixture Cement based foam concrete of natural aging experiences high shrinkage of foam concrete mix in the formwork and shrinkage strain when drying. When managing the microstructure of the composite, namely the change (acceleration) of the microstructure formation and reinforcement of the cement stone, significant decrease can be achieved in the values of shrinkage strain. The purpose of this research is to study the patterns of influence of the chrysotile asbestos fibers and the glyoxal crystalline on shrinkage deformations of cement based foam concrete of natural aging. The foam concrete mixture was produced by one-step technology in the laboratory mixer. Values of plastic shrinkage and plastic strength were determined during three hours after pouring the foam concrete mixture into a metal vessel. The microstructure investigation results have shown that introduction of chrysotile asbestos fibers in an amount of 2 % and glyoxal crystalline in an amount of 0.01 % by weight of cement provides a finely porous foam concrete structure with more uniform size closed pores, which are evenly distributed over the volume. Experimental studies have demonstrated that if chrysotile asbestos fibers are introduced in an amount of 2% and the crystalline glyoxal in an amount of 0.01 % by weight of cement it leads to decrease in plastic shrinkage by 40 to 29%, shrinkage when drying by 44 and 50% and growth in plastic strength by 63 and 45% respectively. 10.5862/MCE.54.6 foam concrete shrinkage strain chrysotile asbestos crystalline glyoxal strength https://engstroy.spbstu.ru/article/2015.54.6/ 06.pdf

RAR RUS 63-69 56504969400 0000-0001-8879-1190 Kazan State University of Architecture and Engineering Ibragimov Ruslan rusmag007@yandex.ru

Kazan, Russia

Kazan State University of Architecture and Engineering Pimenov Sergey 3.14manon@mail.ru

Kazan, Russia

Kazan State University of Architecture and Engineering Izotov Vladimir v_s_izotov@mail.ru Effect of mechanochemical activation of binder on properties of fine-grained concrete This paper presents the effect of mechanochemical activation of on the physico-mechanical properties of fine-grained concrete. The optimal time of mechanical activation of cement slurry was defined, at which the maximum increase in the compressive strength of fine-grained concrete was achieved. The quantity of Portland cement activated by its total weight in the composition slurries was experimentally established. The effect of superplasticizer Relamiks T-2 on the properties of fine-grained concrete produced on activated binder for heat cement paste both with and without supplement, was studied. The change of particle size distribution of Portland cement subjected to mechanical activation was shown. The results of experimental studies have shown that mechanochemical activated binder can significantly increase in the early stages of hardening the bending strength (71 %) and compression strength (64 %), and maintain it in project life, which is especially important for monolithic construction. The composition of the particulate activated binder changes significantly, which leads to high physical and mechanical properties of the investigated concrete and its hardening rate. 10.5862/MCE.54.7 mechanochemical activation rotor-pulsation apparatus superplasticizer cement slurry cement composites https://engstroy.spbstu.ru/article/2015.54.7/ 07.pdf

RAR RUS 70-76 7102546144 0000-0001-7651-1534 Moscow Automobile and Road Construction State Technical University Kirillov Andrey kirill806@gmail.com

Sochi, Russia

56503963100 Lomonosov Moscow State University Zavyalov Mikhail zavyalov.m.a@gmail.com Modeling of change in asphalt concrete dynamic modulus Historically, since the 1930s, deformation and power criteria were defined by methods of calculation of non-rigid road clothes (the deformation modulus, the California bearing ratio, the dynamic modulus). For almost a centenary history considerable statistical changes of the specified indicators in road layers were collected. However, the physical essence of these changes and their regularity still remain unknown. Over the last decade in the field of auto roads the use of energy criteria has been more universal in comparison with the strength and deformation. These criteria bear in itself a predictive function, allow not only estimating integrally and complexly the pavement functional condition, but also managing this state during operation. Despite this fact, in today’s regulatory documents one of the main characteristics of asphalt concrete is still the deformation indicator – dynamic modulus. At the same time, now there is no reliable approach that would make it possible to define change of dynamic modulus of asphalt concrete in operation, so this task is still urgent. Moreover, there are no accurate dependences of ratio change between static and dynamic modules of asphalt concrete during operation. Change of dynamic modulus as private indicator can be used at calculation of energy functions variation. In this paper the authors made an attempt to simulate changes of dynamic modulus of asphalt concrete when loading and analyzed the suggested viscoelastic model. New results, in particular analytical dependences, can form the basis of new regulatory documents for asphalt concrete pavement construction. 10.5862/MCE.54.8 asphalt concrete dynamic module pavement exploitation state dynamic influence https://engstroy.spbstu.ru/article/2015.54.8/ 08.pdf

RAR RUS 77-85 Northern (Arctic) Federal University named after M.V. Lomonosov Karelskiy Aleksandr kaw_79@mail.ru Northern (Arctic) Federal University named after M.V. Lomonosov Zhuravleva Tatyana t.zhuravleva@narfu.ru Northern (Arctic) Federal University named after M.V. Lomonosov Labudin Boris labudin@hotmail.ru Load-to-failure bending test of wood composite beams connected by gang nail The results of a bending test of wood composite beams connected by gang nail are presented in this paper. Two types of wood composite beams fracture were observed: brittle and ductile. In addition, a numerical model of wood composite beams was produced and the results of the numerical investigations were analyzed. Compliance of connection «gang nail – wood» was considered by means of input elements with a reduced modulus of elasticity in the numerical model. Then the theoretical and experimental results of stress and strain state of a composite beam with gang nail were compared. The conclusion was made about the efficiency of gang nail application for increased shear resistance of wood composite structures not only for reinforcement but also for production of new beam structures. 10.5862/MCE.54.9 gang nail composite wooden beams bending shear edge strain reinforcement https://engstroy.spbstu.ru/article/2015.54.9/ 09.pdf

RAR RUS 86-99 St. Petersburg State University of Architecture and Civil Engineering Ulshin Aleksey lesha.ul@mail.ru Experimental justification of a way to increase complex technological effectiveness of steel rod structure The author analyses modern technologies and equipment used for producing and installing metalwork and also some types of structures. Therefore, additional reserves of increase in technological effectiveness were due to the selection of the optimal geometrical form, improvement of separate parts of the structure, values of separate design data for certain manufacturing technology. The complex indicator of technological effectiveness should be used by organizations involved in production and installation of metalwork for increasing complex technological effectiveness in comparison with the project variable design. Issues of the experiment were: 1) to give justification of a technique to define a complex indicator of technological effectiveness and the assumptions made when developing this technique; this can be achieved by comparison of theoretical and actual values; 2) to confirm that an improved constructive and technological solution results in the increase of the complex indicator of technological effectiveness in comparison with the design option. 10.5862/MCE.54.10 complex technological effectiveness steel rod structure indicator of technological effectiveness https://engstroy.spbstu.ru/article/2015.54.10/ 10.pdf

RAR RUS 100-107 Donbas National Academy of Civil Engineering and Architecture Penchuk Valentin penshyk@rambler.ru Kharkiv National Automobile and Highway University Rudnev Viacheslav rudnev_vyacheslav@mail.ua Kharkiv National Automobile and Highway University Saenko Natalie Saenko sayenkonv@mail.ru Kharkiv National Automobile and Highway University Suponev Vladimir v-suponev@mail.ru Kharkiv National Automobile and Highway University Oleksyn Vladimir vladimirumm@ukr.net Kharkiv National Automobile and Highway University Balesniy Sergey sergey.balesnyy@mail.ru Kharkiv National Automobile and Highway University Vivchar Stanislav vivchar.stanislav@gmail.com Soil thrust boring plant of static action with ring spacers of horizontal wells The combined method of horizontal wells development by a soil thrust boring plant of static action with cutting rings has been proposed. The ratio between the diameters of the cutting ring and horizontal well has been determined. The regression equation was received to determine a minimum depth of a horizontal well laying depending on the diameter of the bore hole and soil porosity. The dependencies for determining emerging forces while developing a horizontal well with a cutting ring and its cleaning with a disk with account of geometric parameters of the working equipment and soil condition have been established. The general view of the soil thrust boring plant and its working equipment for developing horizontal wells has been presented. 10.5862/MCE.54.11 trenchless technologies communication horizontal well thrust boring method,; jacking combined method soil https://engstroy.spbstu.ru/article/2015.54.11/ 11.pdf