Magazine of Civil Engineering, No.7(51), 2014
Building materials and articles. Technology and organization of construction
for this half-year
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I.V. Ivashov, A.S.
Today structural health monitoring is a widely
developing field that enables real-time damage detection of engineering
structures and elements. Monitoring is carried out using a set of sensors, most
of which contain piezoelectric materials. So far the problem of crack
resistance and lifetime estimation for polycrystalline piezoelectric materials
has not been fully solved.
A.P. Svintsov, Yu.V. Nikolenko, M.I. Kharun, A.S. Kazakov
This paper presents the results of studies of
the effect of petroleum products, impregnating in concrete, on its deformation
properties. Petroleum products, impregnating in concrete and reinforced
concrete structures, have a negative impact on their strength and deformation
characteristics. The negative impact of petroleum products on concrete and
reinforced concrete is associated with changes in the hydration process of
cement, as well as changes in the structure of the concrete.
Yu.G. Barabanshchikov, A.A. Arkharova, M.V. Ternovskii
Cement paste shrinkage and influence of the shrink-resistant additive
Estrifan Additive RCL on this process were studied, both when the latter one
was used independently, and in a combination with the superplasticizer
Muraplast FK48, and powdery fillers - fly ash and silica fume Reftinskaya TPP
ISU-85. It has been revealed that cement shrinkage in the presence of this
additive is reduced regardless of the presence or absence of mineral
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M.T. Zuginisov, M.M. Myrzahmetov, D.T. Sartayev, Ye.S. Orynbekov
In the construction
materials industry, expensive refractories (fire clay, silica, high- aluminous,
etc.), are used as the main lining materials which despite their high fire
resistance are inefficient for the use in thermal aggregates with an operation
temperature up to 1300 °C. The purpose of the
research was to develop heat-resistant concrete on the basis of sodium silicate
binder and liquid glass with application of ferrochrome slag. Studies on the
use of ferrochrome slag to obtain heat-resistant concrete are quite limited.
N.M. Krasinikova, N.M. Morozov, I.V.
In this paper an example of introduction of
fine-grained concrete in production of ferroconcrete products is reviewed. The
study is important because a high-quality material can be obtained with the use
of local raw materials. Advantages of high-strength fine-grained (sandy)
concrete are decrease in the mass of structures in bearing elements of
buildings due to the reduced volume of
concrete (to 50%).
N.A. Kondrashov, A.A. Shestopalov
This paper studies the existing hot-mix asphalt
compaction technology and points out that designation of the appropriate
asphalt rollers and working parameters has to be performed in accordance with
mechanical characteristics of the layer. A way to avoid defects during the rolling process
is proposed based on determination of material properties before starting
asphalt compaction. Due to a large variety of used types and compositions of
asphalt mixes, determination of their characteristics by practical consideration
The paper proposes a special kind of function of
beta probability density distribution of the random variable to estimate
probability of execution of the construction program in full and within the
given timeframe. This function allows us to consider the impact of the
effectiveness of the control system on the probability of the program execution
O.A. Kapshuk, V.T.
With the development of monolithic construction an
issue about improving the efficiency of its use appears. One of the ways to
increase it is expedient use of formwork systems. The studies have shown
problems in the existing regulatory documentation in relation to progressive
shuttering. The paper describes methods and results of
computational experiments to study the technical and economic indicators of the
construction of monolithic frame in disassembled formwork.