33407 2304-6295 6 69 2018 1-66

RAR RUS 1-9 Peter the Great St. Petersburg Polytechnic University Strelets Kseniya kstrelets@mail.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Kitain Mikhail 9344736@gmail.com Air purification from hot metal droplets in the industrial ventilation system during welding Weld spatter properties and ways to protect filters from the burning weld splatters were analyzed in the article. It was deter-mined that solidified spatter can be considered as an active agent in environ-ment pollution due to high dispersion, and there is a mass excess comparing with spatter spray. In case of flowing to the ventilation system hot metal drops may cause the fire in case of the contact with the filter material. The series of the experiments don had shown major characteristics of the hot metal drops creation process and time of their selfcooling. The efficiency of hot metal droplets capture and slaking in a uniflow cyclone was determined. 10.18720/CUBS.69.1 69 hot metal droplets filtration uniflow cyclone weld spatter air purification explosive dust https://unistroy.spbstu.ru/article/2018.69.1/ 1_69.pdf

RAR RUS 10-24 Osadchy Alexandr Petersburg State Transport University, St. Petersburg, Russia Belyi Andrei andbeliy@mail.ru Petersburg State Transport University, St. Petersburg, Russia Efanov Dmitry TrES-4b@yandex.ru Petersburg State Transport University, St. Petersburg, Russia Shestovitskiy Dmitriy diamond0110@mail.ru Monitoring of technical condition of the St. Petersburg Arena Stadium Sliding Roof The authors describe a set of measures for developing and creating of a continuous monitoring system for technical condition of the St. Petersburg Arena stadium roof structure. This stadium began operating in Saint Petersburg in late 2016. The uniqueness of the design was predetermined by the careful analysis of the measuringcontrollers arrangement in the computer model of the diagnostic object. The work describes the object under test ingeneral and the sliding roof apart, as well as the connection points of the measuring controllers sensors indicatingthe required number of them (strain gauge, inclinometer, deflection sensors, and a weather station are used). Thetechnical solutions introduced in the paper allow the transfer of monitoring results to the city's situation center, which in turn increases safety level and reduces the emergencies risks at the diagnostic site. 10.18720/CUBS.69.2 69 continuous monitoring structural monitoring engineering constructions routine control diagnosis forecasting https://unistroy.spbstu.ru/article/2018.69.2/ 2_69.pdf

REV RUS 25-34 Peter the Great St. Petersburg Polytechnic University Novik Anatoliy novik.anatoliy@inbox.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Solovyeva Anastasiya solovyova_anastasiya@mail.ru Stabilizing additives of various production for stone mastic asphalt This article considers type of road surface as stone mastic asphalt (SMA) and the use of stabilizing additives to improve the characteristics of this pavement. The work was given the classification of existing stabilizers depending on the main constituents. The main properties, features and cost of the most common types of additives both imported and domestic were considered. A comparative analysis was carried out which led to the conclusion that Topcel is the most economical stabilizing additive in terms of consumption due to the high content of cellulose fibers. And from the economic point of view, the optimal option in the calculation of average cost of the additive per tonne of SMA can be considered the additives of the Russian production Hrizotop and Stilobit, as their value does not depend on the exchange rate and the cost of importing the goods. doi: 10.18720/CUBS.69.3 69 stone mastic asphalt stabilizing additive granular stabilizer cellulose fiber pavement https://unistroy.spbstu.ru/article/2018.69.3/ 3_69.pdf

RAR RUS 35-58 G-1611-2018 56352359500 0000-0002-5156-7352 Volgograd State Technical University Korniyenko Sergey Valeryevich svkorn2009@yandex.ru

Volgograd, Russian Federation

O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru

St. Petersburg, Russian Federation

15730895100 0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander Sergeevich alsgor@yandex.ru

St. Petersburg, Russian Federation

57190865804 0000-0002-8136-3246 Peter the Great St. Petersburg Polytechnic University Olshevskiy Vyacheslav Ianushevich 79119199526@yandex.ru

St. Petersburg, Russian Federation

Peter the Great St. Petersburg Polytechnic University Pestryakov Igor pestr47@mail.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Designed thermophysical parameters of walls made of autoclaved aerated concrete blocks The object of investigation are apartment residential buildings located in various climatic zones of the Russian Federation with application of outer walls made of autoclaved aerated concrete blocks (AAC). Based on the results of thermophysical calculation it is established that application of heat conductivity of AAC according to Russian standard (GOST 31359–2007) significantly overestimates the design total resistance to a heat transfer (R-value) of walls made of AAC and it is not recommended to use when developing the project documentation. Use of these data also overestimates a class of energy saving of buildings. Based on the results of thermophysical calculation it is shown that values of the reduced resistance to a heat transfer of the walls made of AAC conform to minimum admissible step-by-step requirements of the Russian standard (SP 50.13330.2012). Divergence of calculated and measured R-values is caused, mainly, by a discrepancy of designed thermophysical parameters of the material layers accepted depending on operated conditions of the building components. In comparison to the Russian standard (GOST 31359-2007) the calculated R-values based on the results of laboratory researches of heat conductivity of AAC provide the best approach to the measured values in design. Calculation in an assumption of linear dependence of heat conductivity on humidity underestimates temperature in the thickness of a building component. Application in thermophysical calculations of exponential dependence of heat conductivity on humidity of AAC, according to the received results of pilot studies, allows estimating more precisely the thermal conditions of outer wall in a designing process of buildings. doi: 10.18720/CUBS.69.4 69 civil engineering AAC outer walls resistance to heat transfer heat insulation heat losses energy conservation energy efficiency https://unistroy.spbstu.ru/article/2018.69.4/ 4_69(1).pdf

RAR RUS 59-66 Peter the Great St. Petersburg Polytechnic University Kozinets Galina galina4410@yandex.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Kozinetc Pavel pavelkozinetc@yandex.ru Strength steel plugs for conduits Krasnoyarskaya HPP The object represented by the research are steel caps covering water hydraulic laboratory Krasnoyarskaya hpp. Gives an overview of publications on methodology and survey of computational substantiation of structures under corrosion. Calculations carried out using finite elements. Based on the results of the calculations identified stockpiles of steel strength. Defined voltage and stiletto. Recommendations for future stubs. 10.18720/CUBS.69.5 69 steel structures corrosion plugs conduits inspection finite element method strength deformation https://unistroy.spbstu.ru/article/2018.69.5/ 5_69.pdf