75504 2712-8172 3 71 2017 1-75

RAR RUS 3-9 Peter the Great St. Petersburg Polytechnic University Fedorov Mihail M.Fedorov@spbstu.ru

St. Petersburg, Russia

Petersburg State Transport University Makarova Elena 4578097@mail.ru Emperor Alexander I St. Petersburg State Transport University Titova Tamila t.s.ttitova@gmail.com Recycling of spent battery electrolytes for construction material production The issue of spent battery electrolytes recycling in the process of construction material production and also the negative impact of such wastes on environment are considered in this article. Modern methods of processing as spent batteries and their electrolytes are analysed. In this article proposed to recycle spent acid battery electrolyte, applying it as additional component of the mixing liquid for phosphate systems, featured by high mechanical properties, heat and acid resistance. Also authors proposу to recycle spent electrolyte as preparation liquid for mortar made of blast-furnace slag, which is used for construction material production. Values of thermodynamic functions, obtained as a result of calculations, show that hardening reaction of the phosphate system is spontaneous (∆G°298 = -423.6 kJ/mol) and exothermic (ΔН°298= -719.6 kJ/mol). Hardened system represents strong artificial stone which can be used, for example, in construction of floors in workshops with aggressive media, for lining of towers, etc. Test results have shown that maximal strength value of artificial stone (17 MPa) is reached when 15 % of spent acid battery electrolyte is added into phosphate system. The method of geoecological assessment of designed technological solutions is also described. 10.18720/MCE.71.1 spent battery electrolyte recycling construction material https://engstroy.spbstu.ru/article/2017.71.1/

RAR RUS 10-20 Peter the Great Saint Petersburg Polytechnic University Korovkin Vladimir korovkin40@yandex.ru

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Ragulin Kirill kir3221@gmail.com

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Kuzina Aleksandra 19sacha94@mail.ru

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Smolenkova Aleksandra sashasmolenkova@mail.ru

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Nina Orlova orlova.ns@edu.spbstu.ru

Polytechnicheskay, 29

Computation of mooring quay in the form of pile grillage The calculation of a pile grillage quay, as a frame with rigid anchored legs, using in technical literature and normative documents, is called a method of Gersevanov. The transformation of a manual calculation to a computer calculation almost preserves an existing design diagram. The article presents the practical implementation of a proposed early an engineering universal calculation method for quays. In the proposed design diagram of a frame with an elastic anchorage of the bases of frame legs is used instead of the rigid anchorage. It uses stiffness characteristics of soil as the variable coefficients of the subgrade reaction. An engineering solution of determining a diagram of a lateral earth pressure in a silo of variable width and the engineering calculation method of the pressure redistribution on the back sheet pile wall from external ground pressure on the inclined pile row are showed in the article. Taking into account the deformation characteristics of soil the comparative calculations showed their significant impact on the internal forces in the elements of the quay in comparison with the N.M. Gersevanov’s method. 10.18720/MCE.71.2 hydraulic engineering construction high pile grillage calculation method coefficients of subgrade reaction https://engstroy.spbstu.ru/article/2017.71.2/

RAR RUS 21-29 23493671500 Siberian Transport University Shakhov Sergey sashakhov@mail.ru 57194617402 Siberian Transport University Rogova Elena elena.rogova4@yandex.ru Disaggregation of ultrafine powders in conditions of ultrasonic cavitation Use of high-dispersive additives as structure modifiers is one of the most effective instruments of cement composites required technical exploitation characteristics increase nowadays. However, use of high-dispersive powders is complicated by the fact that their particles are consolidated into aggregates. Thus, the major advantage of high-dispersive powder, which is its possibility to form more bonds when their content is very low, appears to be unrealized. One of the promising directions of dispersed phase fine grinding is use of ultrasonic cavitation. Ultrasonic exposure does not always provide the efficiency required due to insufficient information about the effect of conditions defining ultrasonic radiation intensity on amount of aggregates damage. In this regard, it is necessary to define factors and conditions of ultrasonic exposure, which provide effective high-dispersive powders disaggregation. In article аcoustic streaming in a fluid occurring due to cavitation and providing mass transfer intensification has been considered. The data about efficiency of cavitation bubble size and large-scale acoustic streaming effect on the distribution of powder particle size were obtained by calculation. The efficiency of high-dispersive powders disaggregation can be improved by using lowered hydrostatic pressure exposure. 10.18720/MCE.71.3 high-dispersive powders additive aggregates disaggregation ultrasound cavitation cement buildings construction https://engstroy.spbstu.ru/article/2017.71.3/

RAR RUS 30-38 Peter the Great Saint Petersburg Polytechnic University Vakhrushkina Anna anna.vahrushkina@mail.ru

Polytechnicheskay, 29

57192664941 Peter the Great Saint Petersburg Polytechnic University Mishakova Anastasiia nastya.misha14@gmail.com

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Borshcheva Ksenia ksenbor@icloud.com

Polytechnicheskay, 29

Earned value management in project time control The paper is devoted to earned value management, it describes the basic tools of this method, particular attention is directed to the indicators of the deviation of the time of the project. Also reasons for not using the method in practice are revealed. The main problem of the method of earned value management – the impossibility of its application to project time control, analyzed ways to solve this problem, proposed by W. Lipke, were identified. As an example, a project consisting of 8 works was reviewed. It has been reviewed three cases of possible cost sharing between critical and non-critical activities. It is revealed that the method proposed by Lipke, is not suitable for the project, where the cost of critical activities is low. The conclusions are about the possibility of using the method for the project time control. 10.18720/MCE.71.4 method of management earned value project time control planned value actual cost earned value management https://engstroy.spbstu.ru/article/2017.71.4/

RAR RUS 39-50 16242836100 0000-0002-7295-8934 Kostroma State University Susoeva Irina i.susoeva@yandex.ru

Kostroma, Russia

57189525518 0000-0002-7201-5979 Kostroma State University Vahnina Tatiana t_vachnina@mail.ru

Kostroma, Russia

Kostroma State University Titunin Andrey a_titunin@ksu.edu.ru Kostroma State University Asatkina Jana jana1967@mail.ru The performance of composites from vegetable raw materials with changes in temperature and humidity The composite board materials with woodchip fillers and nonprocessable flax and cotton processing waste based on the thermosetting binder matrix can be used as construction material for thermal insulation purposes. Research methods of temperature and humidity change influence on adhesive-bonded board materials’ qualities are reviewed. The results of strength and loss of mass behaviour of board materials after the cyclic tests of soaking/freezing/thawing/drying are discribed. Board of unrecoverable waste spinning flax and cotton have the remaining strength is more than 60 % after ten cycles. The experimental data confirm the existence of long-term resistance of the composites to variable temperature and humidity effects. 10.18720/MCE.71.5 strength static bending cyclic test composite board materials https://engstroy.spbstu.ru/article/2017.71.5/

RAR RUS 51-60 Peter the Great St. Petersburg Polytechnic University Aleksandra Bushmanova nicealexa@mail.ru

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

Peter the Great Saint Petersburg Polytechnic University Videnkov Nikita xnickid@gmail.com

Polytechnicheskay, 29

Peter the Great St. Petersburg Polytechnic University Semenov Kirill kvsemenov@bk.ru

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

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

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Dernakova Aleksandra sasha231296@mail.ru

Polytechnicheskay, 29

Peter the Great St. Petersburg Polytechnic University Korovina Victoria vika9696@inbox.ru

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

The thermo-stressed state in massive concrete structures This article examines the justification for using one-dimensional structural models in the analysis of the thermo-stressed state in massive concrete and reinforced concrete structures during the building period. The paper presents calculation results for the thermo-stressed state in massive foundation slabs with different planform dimension ratios. Special attention is paid to presence/absence of thermal insulation on the sides of the slab during the mixture pouring process. Generally, onedimensional structural model is suitable in cases when ratio h/l < 0.17, h stands for the minimal plane dimension in a construction such as slab. The research indicates the existence of zones near the sides of slabs, where values of the tensile stress exceed the values that were obtained with use of onedimensional structural model. This excess may account for 9.5 %. 10.18720/MCE.71.6 the building period massive concrete and reinforced concrete structures cement setting temperature thermal stressed state thermal cracking resistance one-dimensional structural model https://engstroy.spbstu.ru/article/2017.71.6/

RAR RUS 61-67 H-9967-2013 16412815600 0000-0002-8588-3871 National Research University "Moscow Power Engineering Institute" Kirsanov Mikhail mpei2004@yandex.ru

14, Krasnokazarmennaya, 111250 Moscow, Russia

National Research University "Moscow Power Engineering Institute" Zaborskaya Natalia zaborskaya.natalia@gmail.com Deformations of the periodic truss with diagonal lattice A scheme for statically determinate flat lattice-type truss is investigated. The truss has two supports and uniformly loaded at the upper zone. Analytical dependencies of the deflection of the structure and displacement of the movable support from its size, load and number of panels are obtained. It is shown that if the number of panels in multiples of three, the truss cinematically altered, as is clear from the zero determinant of the system of equilibrium equations. The relevant diagram of the possible speeds of the nodes was defined. The system of computer mathematics Maple with induction method was used for output results. This approach was previously proposed and developed by the author in some problems related to the pivotal plane and spatial trusses. It was discovered intermittent character of the dependence of deflection on the number of panels. Asymptotic properties of the solution were found. The features of the solution allow us to optimize the size of the structure. 10.18720/MCE.71.7 induction method lattice truss deflection construction structural mechanics kinematic variability https://engstroy.spbstu.ru/article/2017.71.7/

RAR RUS 68-75 Peter the Great Saint Petersburg Polytechnic University Barashkova Polina barashkova.p.s@yandex.ru

Polytechnicheskay, 29

Peter the Great St. Petersburg Polytechnic University Molodkina Ludmila asminaster@gmail.com

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

Peter the Great Saint Petersburg Polytechnic University Korovina Maria mariiakorovina@yandex.ru

Polytechnicheskay, 29

Both sided irradiated track membrane in local water supply Membrane filtration is one of the main methods for individual and local water supply systems. Track-etched membranes are among the types of membranes that allow to obtain high quality purified water due to their high selectivity. Ensuring the durability of track-etched membranes is one of the topical issues on their use. Comparative research of the natural water filtration process using standard 12-μm track-etched membrane and new, more durable 20-μm irradiated on both sides was performed. Both membranes were manufactured by NPF TreM, St. Petersburg. The pore diameter of membranes was 0.20–0.205 μm, the pore density was 2.3 × 108 cm–2 and 1.5 × 108 cm–2 , respectively. The research was conducted with natural water from the pond in the park, "Malinovka" (St. Petersburg, Kosygin pr.). The filtration was run in the dead-end model. Raw water and filtrate samples were analyzed by spectrophotometry and spectroturbidimetry using KFK-3.01 photoelectrocolorimeter and SF-56 spectrophotometer. The dispersion analysis of nature water was performed by dynamic light scattering on Zetatrac laser analyze. The experimental data showed the same dependences of the productivity of dead-end filtration of pond water samples upon the volume of passed water and close values of turbidity and color in filtrate samples for both membranes. The results allowed us to recommend the 20-μm-thick membrane irradiated on both sides with a beam of argon ions having a range shorter than the film thickness for natural water purification for local water supply of individual buildings. 10.18720/MCE.71.8 track membrane water treatment local water supply buildings filtration process productivity efficiency spectrophotometry spectroturbidimetry civil engineering https://engstroy.spbstu.ru/article/2017.71.8/