Magazine of Civil Engineering, №3(38), 2013
Building materials and articles. Construction organization


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Дефекты и усиление зданий и сооружений

Defects and reinforcing of buildings and structures (rus)

March, 21th, in Engineering and Technical Institute the annual scientific and methodological conference "Defects of buildings and structures. Reinforcing constructions" took place. The conference traditionally became the place for meeting and opinion exchange between experts in building inspection and reinforcing.
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Энергоэффективность инженерных сетей зданий

Energy efficiency in engineering networks and systems (rus)

April, 10th, at International construction exhibition and forum “Interstroyexpo” the XV conference “Effective heating, ventilation and air conditioning systems” took place. Traditionally one of the key questions of the conference became energy conservation in engineering systems of the building.
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Examination of design documentation: to be or not to be (rus)

Among the numerous changes in laws and standards that take place recently in Russia constructors and designers are concerned mostly about rules of design documentation endorsement. In August, 2012 Russian Government issued a decree – a Roadmap for improvement of entrepreneurial environment in construction. One of the key points in this plan was the abolition of design documentation examination.
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MATERIALS
Тяжелонагруженные полы на основе мелкозернистых фибробетонов

S.V. Klyuyev, A.V. Klyuyev, D.M. Sopin, A.V. Netrebenko, S.A. Kazlitin
Heavy loaded floors based on fine-grained fiber concrete (rus)

Urgent problems of using needle fiber for fine-grained concrete disperse reinforcement are considered in the article. The fine cement and binder agent with low water requirements were used as an astringent. The main filling material of a fiber concrete mix was granite siftings. It is established that application of the composite binder agent and high-density packaging of filling grains increases strength properties a lot.
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Мультипараметрическая оптимизация структуры ячеистого силикатного бетона

E.I. Shmitko, A.A. Rezanov, A.A. Bedarev
Multiparameter structure optimization of the cellular silicate concrete (rus)

The current task is to maintain the specified quality of concrete porous silica with a decrease in its average density. In the article this problem is solved by a multi-level optimization of the macro- and microstructure based on multi-rich (multiparameter) mathematical model. Algorithm and the general structure of the model and the results of laboratory studies are given.
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 TECHNOLOGY
О характеристиках магнитоконтроля ферропримесей (подлежащих магнитной сепарации) сырья строительных материалов

A.A. Sandulyak, D.V. Ershov, V.A. Ershova, A.V. Sandulyak
About characteristics of the magnetic control of separable ferrous impurities contained in raw construction materials (rus)

The concrete proposal how to develop the existing system of magnetic control of ferrous impurities in construction materials subjected to magnetic separation, is stated. The experimental-calculation model for such control is also shown. The main parameters of such model were estimated on the example of quartz sand and feldspar. The errors of standard methods of magnetic control were revealed for the first time.
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Снижение температуры получения магнезиального вяжущего из бруситов

T.N. Chernykh, A.A. Orlov, L.Y. Kramar, B.Y. Trofimov, A.V. Perminov
Temperature reduction during brucite-based magnesia cement production (rus)

The article considers the problem of reducing the energy consumption during the production process of magnesia cement based on brucite admixed with serpentine, because this solid requires roasting at high temperatures (1100–1200°C). It was demonstrated that the most effective way to increase the energy efficiency of the technology is to use additives, so that roasting intensifiers.
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 METHODS
Использование калориметрии для прогнозирования роста прочности цементных систем ускоренного твердения

A.O. Adamtsevich, S.A. Pashkevich, A.P. Pustovgar
Application of calorimetry for prognosticating strength increase of fast-curing cement systems (rus)

Article presents the results of experimental researches of determination the relationship between growth strength of cement-sand mixture and amount of heat power released during hydration pure cement. And also the effectiveness of accelerating admixture for cement systems is established.
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G.I. Abdullayev, V.Z. Velichkin, T.N. Soldatenko
The organizational and technological reliability improvement in construction by using failure prediction method (rus)

The basis for assessing the reliability is the probability index of plan fulfillment, which is calculated according to known methods based on the beta-distributed random variables. The appropriate dependence for accounting time reserves in non-critical operations and calculated values of probability is proposed.
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 STRUCTURES
Оценка усталостной долговечности крестообразных сварных соединений, передающих нагрузку

T.I. Letova, S.V. Petinov
Fatigue assessment of load-carrying welded cruciform joints (rus)

The results of systematic FEA-based calculations of stress intensity factors and respective S-N curves for the considered welded joints are presented. Main results obtained during this investigation can be used in solution of engineering tasks in reference to the fatigue assessment of welded cruciform joints with incomplete penetration.
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Деформативность штукатурных составов в современных теплоэффективных наружных стенах зданий

V.V. Babkov, O.A. Rezvov, E.A. Gafurova, D.V. Kuznetsov, D.A. Sinitsin, R.S. Kildibaev, R.R. Vakhitov, A.A. Samoilov
Deformability of plastering compositions in design solutions of modern thermal protective exterior walls (rus)

The problem of ensuring durability of thermal efficient external walls with the use of protective and decorative plaster systems were identified in this article. The factors, affecting the resistance of facade plasters to the action of external conditions in operating process were considered. The weaknesses in the necessary characteristics of plaster mixtures provided by material manufacturers are revealed.
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