75504 2712-8172 Magazine of Civil Engineering 7 42 2013 1-91
CHR RUS 4-6 Peter the Great Saint Petersburg Polytechnic University Yakubson Vera engstroy@inbox.ru
Polytechnicheskay, 29
 Buildings and structures survey: conference as a way of solving problems On September, 18th, in Saint-Petersburg the scientific and technical conference "Problems of buildings and structures survey and ways of its solutions" took place. The conference was carried out in Saint-Petersburg State Polytechnical University for the fourth time. This year the event became really allRussian: specialists from around 20 Russian cities took part in it. 10.5862/MCE.42.1 buildings survey testing of structures building monitoring aging of materials https://engstroy.spbstu.ru/article/2013.42.1/ 01.pdf
RAR RUS 7-14 15730895100 http://orcid.org/0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander alsgor@yandex.ru
St. Petersburg, Russia
 D.I. Mendeleev All-Russian Institute for Metrology Sokolov Nikolay n.a.sokolov@vniim.ru Inconsistency in Russian and international standards in the determination of the design values of thermal conductivity of building materials and products The article presents a comparative analysis of international and Russian regulatory procedures for determining the design thermal conductivity of building materials and products. It was shown that the methods for determination of design thermal values, accepted by international standards, are more appropriate. Design according to Russian standards leads to an overestimation (degradation) of the design characteristics of thermal insulation materials, resulting in an unjustified increase of 10–15% of the thickness of the insulating layer in the building envelope. In addition, Russian regulations of determining the design values of the thermal conductivity of building materials assume unfounded and unsupported by real operating conditions values of the weight ratio of moisture in the material. The authors believe that in order to improve the situation, in determining the design values of the thermal conductivity of building materials, Russian standards should be harmonized with international standards. 10.5862/MCE.42.2 building materials and products international standards thermal conductivity declared thermal values design thermal values energy efficiency energy conservation https://engstroy.spbstu.ru/article/2013.42.2/ 02.pdf
RAR RUS 15-25 Ogarev Mordovia State University Selyaev Vladimir mossrorm@yandex.ru Ogarev Mordovia State University Neverov Vyacheslav ua4uu@mail.ru N.P. Ogarev Mordovia State University Mashtaev Oleg oleg.mashtaev@bk.ru N.P. Ogarev Mordovia State University Kolotushkin Aleksey karlson1520@yandex.ru Properties of silica fume procured from natural diatomite and its usage in the production of vacuum insulation panels The article shows the results of the research of silica fume particles procured from diatomite from Atemar deposit by means of separating silicic acid from colloidal dissolved state into the sediment. The objective of the work was to define thermal-physical and structural characteristics of the silica fume. The research included IR-spectrometry, granulometry, thermal gravimetric analysis, X-ray structural analysis, optical microscopy, and small angle X-Ray scattering. As a result of the research, the silica fume was defined to predominantly consist of amorphous silicon dioxide and had the developed pore structure of particles. A large number of nanosized particles and pores decreases heat transmission and increases reactive capability, that gives opportunity of using the powder silica fume as an active agent in dry mixes and concrete composites, as a component of sponge-glass, and as a filler material in vacuum insulation panel. 10.5862/MCE.42.3 diatomite powder silica fume vacuum insulation panel https://engstroy.spbstu.ru/article/2013.42.3/ 03.pdf
UNK RUS 26-31 Kazan State University of Architecture and Engineering Morozov Nikolai nikola_535@mail.ru Kazan State University of Architecture and Engineering Avksentiev Vladislav nikola_535@mail.ru Kazan State University of Architecture and Engineering Borovskikh Igor borigor83@gmail.com Kazan State University of Architecture and Engineering Khozin Vadim borigor83@list.ru
Kazan, Russia
 Use of wastes of rubble crushing in self-compacting concrete Use of wastes of rubble crushing in the concrete structure allows improving physical and mechanical properties and resolving the issue of recycling. Their use as fillers in self- compacting concrete will reduce costs and improve the economic attractiveness of this material. In the course of the research the compounds of self-compacting concrete with the use of waste powder of rubble crushing were obtained. For such concretes the optimal superplasticizer, featuring additional stabilizing effect that allows obtaining a homogeneous concrete mix, was selected. The results of the study show the relation between cement consumption and viscosity of concrete mix; the dependence of the superplasticizer consumption on the cement type. Application of waste powder can reduce the consumption of silica fume in the composition of selfcompacting concrete and achieve strength 58,5 MPa at a rate of 400 kg /m3 . 10.5862/MCE.42.4 self-compacting concrete waste of rubble crushing superplasticizer filler strength https://engstroy.spbstu.ru/article/2013.42.4/ 04.pdf
RAR RUS 32-39 Peter the Great Saint Petersburg Polytechnic University, PRDI “Venchur” Ulybin Alexey ulybin@mail.ru
Polytechnicheskay, 29
 LLC “BiospeysStroy” Startsev Sergey StartsevSA@biospacestroy.ru Peter the Great Saint Petersburg Polytechnic University Zubkov Sergey svzubkov@mail.ru
Polytechnicheskay, 29
 Humidity control in the inspection of masonry structures The problems of wetting of masonry structures were considered: its causes, consequences and methods of humidity control. The classification of destructions that occur in the masonry as a result of its moistening was given. Destruction processes under wetting of different origin were briefly described. The experimentally ascertained impact of humidity on the strength of different kinds of brick was presented. The influence of this factor is often missed in the material testing and analysis of structures. The comparison between different methods of moisture control was given. A technique for measuring the moisture using the calcium carbide method was pictured; this method is little known in Russia. The advantages and disadvantages of non-destructive methods were discussed. Special attention was paid to the definition of errors in electrical control methods, occurring due to existence of salts in the masonry. The recommendations for combined use of different methods of humidity control were given. 10.5862/MCE.42.5 brick moisture salt corrosion inspection of buildings defects of masonry https://engstroy.spbstu.ru/article/2013.42.5/ 05.pdf
RAR RUS 40-50 Northern (Arctic) Federal University named after M.V. Lomonosov Olga Popova oly-popova@yandex.ru
Severnaya Dvina Emb. 17, Arkhangelsk, Russia; 163002
 Peter the Great Saint Petersburg Polytechnic University Simankina Tat'yana talesim@mail.ru
Polytechnicheskay, 29
 The service life estimation method for the structural elements of residential buildings The article covers the building maintenance safety , which depends on design decisions and their implementation in the construction, residual operation time and condition of the object, the rate of the object and the environment changes, serviceability standards and the quality of their implementation during the service life of the object, etc. Ensuring the operation safety is not only technical, but also an economical problem. Aggregate cost of reproductive measures is comparable to the cost of new construction and frequently exceeds it. The research task was mathematical modeling of the growing dynamics of gradual failures of structural components of the building during the operation time based on normative data of Russian design code VSN 53-86(r); the calculation and modeling of the repair costs dynamics as a percentage of the estimated cost of construction works in the value of physical deterioration of structures. The study has found that the numerical value of physical deterioration defined by VSN 53-86 (r) can not be used for estimating the real repair cost, because of its non-compliance with cost of renovation and percentage of components renovation. 10.5862/MCE.42.6 gradual failure modeling of physical wear and tear of structures operational safety service life of the structure estimated cost of repair measures planning of major and capital repairs https://engstroy.spbstu.ru/article/2013.42.6/ 06.pdf
RAR RUS 51-57 Saint-Petersburg State University of Architecture and Civil Engineering Bolotin Sergey sbolotin@mail.ru Tuvan State University Dadar Aldyn-kys daryi@mail.ru Saint-Petersburg State University of Architecture and Civil Engineering Kotovskaya Marina mkotovskaya@gmail.com The model of the space-time analogy in the optimization of the renovation order of buildings The objective of the research was the problem of optimal priorities of the buildings' renovation or major repairs. The number of works can be great because of their short duration. This fact increases the computational processing time depending on linear increase of projects' number exponentially. Uncertainty of the projects' characteristics increases with the time as well. For solving this problem the definition of serial importance of project was introduced and the dynamics of this serial importance was reviewed. The model of the space-time analogy based on the category of the aerial perspective and horizon was built. On the basis of application of this analogy the algorithm of the optimization of priorities in buildings' reconstruction or major repairs was suggested. 10.5862/MCE.42.7 space-time analogy order of construction serial importance of the project planning horizon steepest descent method https://engstroy.spbstu.ru/article/2013.42.7/ 07.pdf
RAR RUS 58-66 Saint-Petersburg State University of Architecture and Civil Engineering Kalyuzhnyuk Mikhail gamma5105@yandex.ru Peter the Great Saint Petersburg Polytechnic University Kalyuzhnyuk Aleksandr iom96@inbox.ru
Polytechnicheskay, 29
 Automated organization production and mounting of glass curtain walls At present the automation of organizational design and organizational preparation of building production is based mainly on the outdated methods. Solution of this requires the development of effective methods of technical regulation and construction scheduling. Authors use methods of technical regulation and scheduling, previously obtained in structuralfunctional modeling theory, for production and mounting of glass curtain walls. The article shows the application of these standards in determining the time of producing series of glass facade elements for particular building sites, as well as in the synchronized scheduling production and mounting of these structures. Authors claim that suggested methods can be used for organizational design and organizational preparation of any other construction processes. Received data can be used to create databases of organization standards of labor and time inputs for production. 10.5862/MCE.42.8 work operations simple technological processes methods of scheduling parallel-flow methods technical regulation automation of pre-production organizational design https://engstroy.spbstu.ru/article/2013.42.8/ 08.pdf
RAR RUS 67-76 Peter the Great St. Petersburg Polytechnic University Bulatov Georgiy bulatov.spbgpu@gmail.com
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great Saint Petersburg Polytechnic University Kolosova Natalya po.isf@cef.spbstu.ru
Polytechnicheskay, 29
 Efficiency of piles of various cross-sectional forms According to the authors the lack of evaluation methods for efficiency of pile behavior leads to an increased degree of randomness in the selection of type, material, shape and placement of piles, and, as a consequence, to overspending the material, energy, labor costs and, respectively, to more expensive construction. The work is devoted to the determination of the efficiency of piles of various cross-sectional forms (round, square, cross- shaped, T-shaped and double tee forms). A number of methods and criteria for quantitative evaluation of the efficiency of piles were proposed. Furthermore, the results of studies of the pile efficiency depending on the driving depth at the above-mentioned forms of cross-sections were given. Researches have shown that quantitative values of pile efficiency are approximately the same for the following forms for round and square cross-section; for T-shaped and double tee; and the are exactly the same for cross-shaped and T-shaped cross-section. Analysis of considered piles forms showed that maximum efficiency was achieved under the minimum depth of 2 meters, and then it gradually decreased. Also there was found an anomaly: at a depth of 10 meters the efficiency of cross sections with the tabs (III, IV, and V-shaped branchy) again begins to rise slowly. The results allow us to optimize more accurately the selection of the pile component in the foundation design. 10.5862/MCE.42.9 efficiency of the pile pile foundation types of piles pile cross-section driven piles https://engstroy.spbstu.ru/article/2013.42.9/ 09.pdf