RESEARCH OF BUILDING MATERIALS

DECORATIVE SANDWICH CONCRETES WITH A PROTECTIVE POLYMER LAYER ENSURING IMPROVED FRACTURE STRENGTH

Vestnik MGSU 3/2012
  • Moiseenko Ksenija Sergeevna - Moscow State University of Civil Engineering(MSUCE) Candidate of Technical Sciences, Senior Lecturer, Department of Technology of Binders and Concretes, Moscow State University of Civil Engineering(MSUCE), 26 Yaroslavskoeshosse, Moscow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Voronin Viktor Valerianovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, 129337, Russian Federation.
  • Panchenko Aleksandr Ivanovich - Moscow State University of Civil Engineering (MSUCE) 8 (499) 287-49-14, ext. 3101, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoeshosse, Moscow, 129337, Russia.
  • Solovev Vitalij Nikolaevich - Moscow State University of Civil Engineering (MSUCE) Doctor of Technical Sciences, Professor, Department of Construction of Nuclear Plants 8(499) 188-03-03, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoeshosse, Moscow, 129337, Russia.

Pages 96 - 99

This paper covers the integrity of decorative sandwich materials; relations between relative deformations of the sandwich system and the length of contact between layers; thicknesses of the surface layer and relative deformations of the concrete base. Principles of the proposed technology are also provided in the article.
The field study of the behaviour of decorative sandwich concrete products exposed to severe conditions of operation have proven that products collapse due to cracking and peeling of the polymer concrete layer in particular cases.
Deformations of sandwich materials caused by temperature and humidity fluctuations were analyzed by strain-gauge resistance sensors placed onto the surface polymer concrete layer of a product fragment and on the concrete base in the course of their freezing. Deformations were measured at the temperature intervals of 4 to 5 degrees Celsius. Freezing represents the most severe condition.
Mathematical method of experimental planning was employed to identify the dependence between relative deformations of sandwich system Исс and length of layer-to-layer contact L, thickness of surface layer h and relative deformations of the concrete base ɛ 105.
As a result of the probabilistic and statistical processing of the experimental data a three-factor quadratic model of relative deformations of a sandwich system was generated.
This equation is used to identify the most favourable conditions to assure the integrity of a sandwich product under the combined impact of the aforementioned factors. The analysis has proven that the surface layer made of polymer concrete does not crack irrespective of the contact length if deformations of the concrete base do not exceed the limit tensibility of the surface layer. In the event of substantial deformations of the concrete base, integrity of the sandwich system is to be assured by means of the right choice of thickness and length of the surface layer.
Based on the dependence of relative deformations of the sandwich composite, made of a concrete matrix and a polymer concrete decorative and protective layer, analysis of their integrity was performed with the account for the thickness of the surface layer, contact length and relative deformations of the water saturated concrete base in the course of freezing.
Pre-set theoretical provisions were applied to develop recommendations aimed at the optimization of the composition and characteristics of the technology of production of double-layer decorative and protective products based on polymer and mineral binders.

DOI: 10.22227/1997-0935.2012.3.96 - 99

References
  1. Piskarev B.A. Dekorativno-otdelochnye stroitel’nye materialy [Decorative Finishing Building Materials]. Moscow, Vysshaja shkola, 1977.
  2. Bazhenov Ju.M. Tehnologiya betona [Technology of Concrete], Moscow, ASV, 2007.
  3. Voronin V.V. Morozostoykost’ i tehnologiya betona s modificirovannym poverhnostnym sloem [Frost Resistance and Technology of Concrete with a Modified Surface Layer]. Author’s abstract of a doctoral dissertation, Moscow, MISI im. V.V. Kuybysheva, 1985.
  4. Moiseenko K.S. Povyshenie treschinostoykosti sloistykh betonnykh izdeliy s dekorativnym polimerbetonnym zaschitnym sloem [Improvement of Fracture Resistance of Sandwich Concrete Products with a Decorative Polymer Concrete Protective Layer]. Author’s abstract of a candidate’s dissertation, Moscow, MGSU, 2011.

Download

PECULIARITIES OF STRUCTURE FORMATION OF CEMENT CONCRETES FILLED WITH SLAG WASTE PRODUCTS OF METAL PROCESSING PLANTS

Vestnik MGSU 11/2012
  • Gubanova Lyudmila Nikolaevna - Volzhskiy Institute of Civil Engineering and Technologies (VISTECH, Branch of Volgograd State University of Architecture and Civil Engineering (VolgGASU) postgraduate student, Department of Material Science and Mechanics, +7(8442)96-99-56, Volzhskiy Institute of Civil Engineering and Technologies (VISTECH, Branch of Volgograd State University of Architecture and Civil Engineering (VolgGASU), 72 pr. Lenina, Volzhskiy, Volgograd Region, 404130, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pushkarskaya Olga Yurevna - Volzhskiy Institute of Civil Engineering and Technologies (VISTECH, Branch of Volgograd State University of Architecture and Civil Engineering (VolgGASU) Candidate of Technical Sciences, Associate Professor, Department of Technologies of Processing and Production of Materials, +7(8442)96-99-56, Volzhskiy Institute of Civil Engineering and Technologies (VISTECH, Branch of Volgograd State University of Architecture and Civil Engineering (VolgGASU), 72 pr. Lenina, Volzhskiy, Volgograd Region, 404130, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Alimova Liliya Andreevna - Volgograd State University of Architecture and Civil Engineering (VolgGASU) Department of Construction Materials and Construction Technologies, +7 (8442)96-99-56, Volgograd State University of Architecture and Civil Engineering (VolgGASU), 1 Akademicheskaya st., Volgograd, 400074, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Akchurin Talgat Kadimovich - Volgograd State University of Architecture and Civil Engineering (VolgGASU) Candidate of Technical Sciences, Professor, Chair, Department of Construction Materials and Construction Technologies, +7 (8442)96-99-56, Volgograd State University of Architecture and Civil Engineering (VolgGASU), 1 Akademicheskaya st., Volgograd, 400074, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 152 - 158

Relevance of traditional replacement of scarce resources of the construction industry similar
to waste products in terms of their composition and condition is unquestionable from the viewpoint
of their economy and the environment. The structure and physical properties of cement concretes
filled with slag waste products are determined by the type and number of tumours, the phase generation
rate, and the structure of the porous space. The research findings have proven that cement
concrete compositions that contain slag demonstrate higher strength than those that have no slag.
Slag waste products can be used as concrete aggregates.
The hydration ratio of samples of cement that had slag waste products added and the hydration
ratio in the course of the composition formation were identified using methods of microscopy
analysis. The structure of samples that had slag products added was analyzed through the employment
of stereoscopic microscope MBS-9 (3.3 - 100.8X) capable of producing a direct-viewing
image of the sample. The point method was employed to analyze the slag phase quantity. The
point method of quantitative metallography was employed to identify the volume ratio of structural
components or phases. Practical implementation of the point method requires a magnifi cation rate
sufficient for the structural components to be big enough to identify whether the point falls within the
phase section or not. The point-to-point distance is to prevent two or more point to fall within one
section of the micro-particle under research.
Optimal mineral additive quantity based on the minimal cement consumption rate or the minimal
cost of concrete, and optimal mineral additive quantity based on the structure determined by the
physical condition of the system, are driven by the redistribution of particles over the cement grout.
The optimal mineral additive quantity from the viewpoint of its structure is the one to be selected, as
the concretes that demonstrate the structure of this type have maximal strength as a response of the
"Cement + Modifying Additive System" to the optimization of the disperse medium of the concrete.

DOI: 10.22227/1997-0935.2012.11.152 - 158

References
  1. Turkina I.A. Neobkhodimost’ i opyt ispol’zovaniya otkhodov proizvodstva [Use of Production Waste Products: Demand and Expertise]. V Mezhdunar. kongress po upravleniyu otkhodami i prirodookhrannym tekhnologiyam VeystTek-2007. [The 5th International Congress on Waste Management and Nature Protection Technologies VeystTek-2007]. Collection of papers, Moscow, 2007, 220 p.
  2. Bal’zannikov M.I., Petrov V.P. Ekologicheskie aspekty proizvodstva stroitel’nykh materialov iz otkhodov promyshlennosti [Ecological Constituents of Production of Construction Materials from Industrial Waste Products]. Sovremennoe sostoyanie i perspektivy razvitiya stroitel’nogo materialovedeniya. Vos’mye akademicheskie chteniya RAASN [The present-day Status and Prospects for Development of the Construction Material Science. The 8th Assembly of the Russian Academy of Architectural and Construction Sciences]. Samara, 2004, pp. 47—50.
  3. Kaushanskiy V.E., Bazhenova O.Yu. Energo- i resursosberezheniya v tekhnologii portland-tsementa za schet ispol’zovaniya tekhnogennykh i netraditsionnykh materialov [Power Saving and Resourcesaving Technologies of Portland-cement Based on the Use of Technology-intensive and Unconventional Materials]. Sovremennye problemy stroitel’nogo materialovedeniya. Sed’mye akademicheskie chteniya RAASN. [Present-day Problems of the Construction Material Science. The 7th Assembly of the Russian Academy of Architectural and Construction Sciences]. Belgorod, 2001, pp. 201—204.
  4. Gubanova L.N., Pushkarskaya O.Yu., Alimova L.A., Akchurin T.K. Otkhody ferrosplavnogo proizvodstva — dobavki vysokonapolnennykh tsementnykh betonov [Waste Products of Ferrous Alloy Production Process as Additives Designated for Cement Concretes That Have a High Rate of Fillers]. Nadezhnost’ i dolgovechnost’ stroitel’nykh materialov, konstruktsiy i osnovaniy fundamentov. Materialy VI Mezhdunar. nauch.-tekhn. konf. [Reliability and Durability of Construction Materials, Structures and Foundation Bases. Works of the 6th International Scientific and Technical Conference]. Volgograd, VolgGASU Publ., 2011, pp. 137—141.
  5. Kafarov V.V., Dorokhov I.N., Arutyunov S.Yu. Sistemnyy analiz protsessov khimicheskoy tekhnologii. Protsessy izmel’cheniya i smeshivaniya sypuchikh materialov. [Systemic Analysis of Chemical Engineering Processes. Processes of Grinding and Mixing of Bulk Materials]. Moscow, 1985, 440 p.

Download

Results 1 - 2 of 2