Magazine of Civil Engineering, No.6 (66), 2016


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Structure-forming processes of cement composites, modified by sucrose additions

T.S. Shepelenko, U.S. Sarkisov, N.P. Gorlenko, N.A. Tsvetkov, O.A. Zubkova
Structure-forming processes of cement composites, modified by sucrose additions

The effect of sucrose on the kinetics of cement hardening has been studied. The study was carried out in two comparative ways, one of which had the organic modifier introduced into cement as gauging liquid (“water – 2% sucrose solution”), the other – as suspensions “cement – water – 2% sucrose solution”. The products of sucrose corrosion, synthesized in suspensions, were used as addition agents in the “cement – water” system.
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Compatibility of portland cement and polycarboxylate-based superplasticizers in high-strength concrete for precast constructions

O.M. Smirnova
Compatibility of portland cement and polycarboxylate-based superplasticizers in high-strength concrete for precast constructions

Application of polycarboxylate-based superplasticizers can contribute to the increase of concrete early strength. It makes possible to obtain the concrete of the required strength after heat-steaming treatment with decreasing the isothermal temperature and the Portland cement quantity compared to the concrete without admixtures.
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CALCULATIONS
Load-bearing capacity of soil loaded with strip-shell foundations

J.V. Naumkina, Y.A. Pronozin, L.R. Epifantseva
Load-bearing capacity of soil loaded with strip-shell foundations

The paper describes the special features of the calculation based on the load-bearing capacity of soil loaded with strip-shell foundations which offer high efficiency in construction of medium and high-rise buildings on strongly compressible soils. The necessity of this calculation is caused by the requirements of Building Regulations.
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ANALYSIS
Distribution capacity of sandy soils reinforced with geosynthetics

A.S. Aleksandrov, A.L. Kalinin, M.V. Tsyguleva
Distribution capacity of sandy soils reinforced with geosynthetics

A review of shear strength analysis methods for ground bases reinforced with geosynthetics is given in the article. An angle of stress dispersion has been found to be the parameter of soils and discrete materials which were calculated according to the experimental data. The analysis of mathematical models that connect the angle of stress dispersion with other soil parameters which are ascertained in the laboratory was performed.
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Laboratory and numerical study of waves in the port area

I.G. Kantardgi, M.J. Zheleznyak
Laboratory and numerical study of waves in the port area

Parameters of waves in water area of the projected port are normally obtained using physical and numerical modelling. Physical modelling allows defininig structural details of the port’s facilities and provides with information for the appropriate selection of a numerical model. The problems created by this approach are shown in the case study of the projected port in Vostok (East) Bay, the Sea of Japan.
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METHODS
Method of thermotechnical uniformity coefficient evaluation by analyzing thermograms

G.P. Vasilyev, V.A. Lichman, I.A. Yurchenko, M.V. Kolesova
Method of thermotechnical uniformity coefficient evaluation by analyzing thermograms

One of the primary problems solved for increasing energy efficiency of a building is increasing of the insulating properties of the building envelope. The paper describes the method for determining the coefficient of thermotechnical uniformity by analyzing a thermogram of parts of a building envelope. The method is based on obtaining temperature distribution matrix on the surface of a building envelope fragment by thermography.
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