The Study of Crack Resistance of Concretes of a New Generation

Number of journal: 10-2019
Autors:

Travush V.I.
Karpenko N.I.
Erofeev V.T.
Erofeeva I.V.
Tarakanov O.V.
Kondrashchenko V.I.
Kesariyskiy A.G.

DOI: https://doi.org/10.31659/0585-430X-2019-775-10-3-11
УДК: 691.3

 

AbstractAbout AuthorsReferences
According to the level of technical and economic indicators, concrete and reinforced concrete are and will remain the main structural materials. New types of effective concretes have been developed in the world practice. All of them are multicomponent, which is determined not only by the variety of chemical and mineralogical composition of the components, but also by the large-scale levels of their dispersion. The new generation of concretes includes powder-activated sand concrete with an optimized content of dispersed fillers and fine crushed sand. A comparison of data on the crack resistance of powder-activated concretes of the new generation, which includes reaction and rheological-active filler, plasticizer and fine aggregates with the properties of materials of the transition and old generations was made. Crack resistance characteristics were determined on beam samples with a pre-induced initial crack. Power and energy parameters: specific energy consumption for static destruction of the sample; static j-integral; static stress intensity factor at normal rupture were considered as the studied parameters. It is established that the increase in water-cement ratio in composites leads to a decrease in the energy parameters of the fracture mechanics. With the introduction of the biocidal additive the trend of effect of water-cement ratio on the parameters of crack resistance of cement stone were the same. The use of reactive and rheological active filler increases the parameters of the crack resistance of sand concrete, especially the static j-integral Ji, which characterizes the energy of viscous (plastic) destruction of the material at the crack top, increasing due to increased adhesion of cement stone to the active surface of the reaction-active filler.
V.I. TRAVUSH1, Doctor of Sciences (Engineering), Professor, Academician of RAACS
N.I. KARPENKO1, Doctor of Sciences (Engineering), Professor, Academician of RAACS
V.T. EROFEEV2, Doctor of Sciences (Engineering), Academician of RAACS
I.V. EROFEEVA2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
O.V.TARAKANOV3, Doctor of Sciences (Engineering)
V.I. KONDRASHCHENKO4, Doctor of Sciences (Engineering)
A.G. KESARIYSKIY5, Candidate of Sciences

1 Russian Academy of Architecture of Construction Sciences (24, Bolshaya Dmitrovka Street, Moscow, 107031, Russian Federation)
2 National Research N.P. Ogarev Mordovia State University (68, Bolshevistskaya Street, Saransk, 4Republic of Mordovia, 30005, Russian Federation)
3 Penza State University of Architecture and Civil Engineering (28, Germana Titova Street, Penza, 440028, Russian Federation)
4 Russian University of Transport (MIIT) (9, build. 9, Obraztsova Street, Moscow, 127994, Russian Federation)
5 LLC Laboratory of Complex Technologies (1a, Iskraskaya Street, Dnepropetrovsk region, Pavlograd, 51412, Ukraine)

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For citation: Travush V.I., Karpenko N.I., Erofeev V.T., Erofeeva I.V., Tarakanov O.V., Kondrashchenko V.I., Kesariyskiy A.G. The study of crack resistance of concretes of a new generation. Stroitel’nye Materialy [Construction Materials]. 2019. No. 10, pp. 3–11. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2019-775-10-3-11


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