Educing anisotropy of strength properties of foam concrete bricks used for constructing a wall for curtain wall systems

Vestnik MGSU 8/2015
  • Tsykanovskiy Evgeniy Yul’evich - LLC DIAT Candidate of Technical Sciences, honorable builder of Russia, recipient of prize of the Government of the Russian Federation in Science and Technology, Director General, LLC DIAT, 3 Marshala Sokolovskogo str., Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Alisultanov Ramidin Semedovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Assistant Lecturer, Department of Engineering Geodesy, Moscow State University of Civil Engineering (National Research University) (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Oleynikov Aleksandr Vladimirovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Assistant Lecturer, Department of Engineering Geodesy, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kagan Mikhail Lazarevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Physical and Mathematical Sciences, Professor, Department of Higher Mathematics, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federation.
  • Pekov Islam Al’bertovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Construction Materials and Products, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 92-100

Curtain wall systems are widely used in the modern construction at building industrial and civil buildings. Works of many Russian and foreign researchers are dedicated to investigation of such structures operation. The main task solved during the use of curtain wall systems is reduction of energy consumption for heating. In this regard the fa?ade systems may be fixed both at rather stable walls having though high thermal conductivity produced of brick and concrete and at the walls of aerated concrete (foam concrete) bricks having lower thermal conductivity. The authors offer preliminary results of the mechanical strength tests of foam concrete bricks. The anisotropy of strength under compression along different edges (axes) was educed, which reached up to 200 %. The authors underline the importance of account for anisotropy of strength properties of foam concrete bricks during the design of fa?ade systems and during monitoring of their state.

DOI: 10.22227/1997-0935.2015.8.92-100

References
  1. Bessonov I.V. Vliyanie temperaturno-vlazhnostnykh vozdeystviy na dolgovechnost’ fasadnykh sistem na osnove mineral’nykh vyazhushchikh [Influence of Temperature and Humidity on Durability of Facade Systems Based on Mineral Binders]. ALITinform: Tsement. Beton. Sukhie smesi [ALITinform: Cement. Concrete. Dry Mixes]. 2007, no. 1, pp. 35—41. (In Russian)
  2. TR 161-05. Tekhnicheskie rekomendatsii po proektirovaniyu, montazhu i ekspluatatsii navesnykh fasadnykh sistem [TR 161-05. Technical Recommendations on Design, Construction and Operation of Curtain wall Systems]. Pravitel’stvo Moskvy [The Government of Moscow]. Moscow, 2005, 15 p. (In Russian)
  3. Vorob’ev V.N. Navesnye fasadnye sistemy : problemy bezopasnosti, proektirovanie NFS, proizvodstvo montazhnykh rabot, krepezh, pozharnaya bezopasnost’, osnovnye pravila ekspluatatsii NFS [Curtain Wall Systems : the Issues of Safety, Design, Construction Works, Fixing, Fire Safety, Main Rules of Their Operation]. Vladivostok, Dal’Nauka Publ., 2011, 72 p. (In Russian)
  4. Granovskiy A.V., Kiselev D.A. Eksperimental’nye issledovaniya raboty ankernogo krepezha pri dinamicheskikh vozdeystviyakh [Experimental Research of Anchor Fastener at Dynamic Impacts]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Seismic Construction. Safety of Structures]. 2012, no. 1, pp. 43—45. (In Russian)
  5. Tsykanovskiy E.Yu. Problemy nadezhnosti, bezopasnosti i dolgovechnosti NFS pri stroitel’stve vysotnykh zdaniy [Problems of Rliability, Safety and Durability of Curtain Wall Systems during Construction of High-rise Buildings]. Tekhnologii stroitel’stva [Technologies of Construction]. 2006, no. 1, pp. 20—22. (In Russian)
  6. Emel’yanova V.A., Nemova D.V., Miftakhova D.R. Optimizirovannaya konstruktsiya navesnogo ventiliruemogo fasada [Optimized Structure of Hinged Ventilated Facade]. Inzhenerno-stroitel’nyy zhurnal [Engineering and Construction Journal]. 2014, no. 6 (50), pp. 53—66. (In Russian)
  7. Kocks U.F., Tomé C.N., Wenk H.-R. Texture and Anisotropy: Preferred Orientations in Polycrystals and Their Effect on Materials Properties. Cambridge, 2000, 688 p.
  8. Ash J.E., Hughes B.P. Anisotropy and Failure Criteria for Concrete. Matériaux et Construction. Nov.—Dec. 1970, vol. 3, no. 6, pp. 371—374. DOI: http://dx.doi.org/10.1007/BF02478760.
  9. Yong-Hak Lee A., Yeong-Seong Park, Young-Tae Joo B., Won-Jin Sung C., Byeong-Su Kang D. Anisotropic Loading Criterion for Depicting Loading Induced Anisotropy in Concrete. Fracture Mechanics of Concrete and Concrete Structures — Recent Advances in Fracture Mechanics of Concrete — B.H. Oh, et al. (eds) 2010, Korea Concrete Institute, Seoul. Available at: http://framcos.org/FraMCoS-7/04-01.pdf. Date of access: 11.11.2014.
  10. Ashcroft I.A. Fatigue Load Conditions. Handbook of Adhesion Technology. Springer, 2011, pp. 845—874.
  11. Reed-Hill R.E., Abbaschian R. Physical Metallurgy Principles. 3rd ed. Boston, PWS Publishing Company, 1994, pp. 230—233.
  12. Callister W.D.Jr. Materials Science and Engineering, an Introduction. 3rd ed. New York, John Wiley & Sons, Inc., 1994, 820 p.
  13. Baranova A.A., Savenkov A.I. Penoobrazovateli i prochnost’ penobetona [Foam Maker and Foam Concrete Durability]. Izvestiya Sochinskogo gosudarstvennogo universiteta [Izvestiya Sochi State University]. 2014, no. 3 (31), pp. 10—14. (In Russian)
  14. Gulyaev V.T., Ganik S.V. Vliyanie kachestva peska na svoystva penobetona [Influence of Sand Quality on Foam Concrete Properties]. Vologdinskie chteniya : materialy nauchnoy konferentsii. Vladivostok, dekabr’ 2011. Vyp. 80 [Vologdinsky Readings : Materials of the Scientific Conference. Vladivostok, December 2011, issue 80]. Vladivostok, Izdatel’skiy dom Dal’nevostochnogo federal’nogo universiteta Publ., 2012, pp. 35—36. (In Russian)
  15. Kobidze T.E., Korovyakov V.F., Kiselev A.Yu., Listov S.V. Vzaimosvyaz’ struktury peny, tekhnologii i svoystv poluchaemogo penobetona [Interrelation of Foam Structure, Technology and Properties of the Obtained Concrete]. Stroitel’nye materialy [Construction Materials]. 2005, no. 1, pp. 26—29. (In Russian)
  16. Rubtsov O.I., Rubtsov I.V. Veroyatnostno-statisticheskie metody monitoringa sooruzheniy [Probability-Statistical Methods of Structures Monitoring]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2006, no. 6, pp. 44—45. (In Russian)
  17. Stepnov M.N. Statisticheskaya obrabotka rezul’tatov mekhanicheskikh ispytaniy [Statistical Processing of Mechanical Tests’ Results]. Moscow, Mashinostroenie Publ., 1972, 232 p. (In Russian)
  18. Doerffel K. Statistik in der analytischen Chemie. VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, 1982.
  19. Volkov A.A., Rubtsov I.V. Postroenie kompleksnykh sistem prognozirovaniya i monitoringa chrezvychaynykh situatsiy v zdaniyakh, sooruzheniyakh i ikh kompleksakh [Design of Integrated Systems Designated for the Forecasting and Monitoring of Emergencies in Buildings, Structures and Their Clusters]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 1, pp. 208—212. (In Russian)
  20. Rubtsov I.V., Kukhta A.V. Nekotorye zadachi monitoringa i perspektivy ikh resheniya na primere fasadnykh sistem [Some Tasks of Monitoring and Prospects of Their Solution on the Example of Facade Systems]. Krovel’nye i izolyatsionnye materialy [Roofing and Insulating Materials]. 2007, no. 7, pp. 44—45. (In Russian)
  21. Rubtsov I.V. Monitoring na stadii vozvedeniya sooruzheniya [Monitoring on the Construction Stage of a Structure]. Integral [Integral]. 2007, no. 5, pp. 86—87. (In Russian)
  22. Rubtsov I.V. Zadachi monitoringa na stadii ekspluatatsii sooruzheniya [Monitoring Tasks on the Operation Stage of a Building]. Integral [Integral]. 2007, no. 6, pp. 102—103. (In Russian)

Download

REINFORCING FIBRES AS PART OF TECHNOLOGY OF CONCRETES

Vestnik MGSU 4/2012
  • Zhukov Aleksey Dmitrievich - Moscow State University of Civil Engineering (MSUCE) C andidate o f Technical S ciences, A ssociated P rofessor, D epartment of Technology of Finishing and Insulating Materials, 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 .
  • Rudnitskaya Viktoriya Aleksandrovna - Moscow State University of Civil Engineering (MSUCE) master student, Department of Technology of Finishing and Insulation Materials, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Smirnova Tat'yana Viktorovna - Moscow State University of Civil Engineering (MSUCE) ROCKWOOL postgraduate student Leading Specialist, Moscow State University of Civil Engineering (MSUCE) ROCKWOOL, 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 160 - 164

Methods of modification of the foamed fibre concrete technology and optimization of its parameters within the framework of methodologies of new construction materials developed by the specialists of Department of Technology of Finishing and Insulation Materials of MSUCE is considered in the paper. The methodology of highly porous materials is based on the research and modeling of their structure, and optimization of the process of their manufacturing. The core constituent of the proposed methodology is the identification of the markets for the designed products, as well as the pre-setting of their properties and assurance of their stability over the time.
The foamed fibre concrete technology represents modified procedures of preparation of the foam, the mineral component, and the basalt fiber, the blending of the components, their casting and heat treatment. The process-related parameters were subjected to double-staged analysis: Stage 1 represented an experiment encompassing the whole process. As a result of the experiment, factors of major impact (or control parameters) were identified. At Stage 2, factorial experiment was conducted to identify second-order mathematical dependencies. The results were subjected to analytical optimization, and graphical representation of dependencies was performed. Selection of the composition and optimal process parameters was performed with the help of G-BAT-2011 software programme developed at MSUCE.
It was identified that the basalt fibre consumption rate influences both the strength and the density of products made of cellular concrete. The length of the basalt fibre impacts the strength of products. A nomogram was developed to identify the consumption rate of the basalt fibre driven by the strength of products and the Portland cement consumption rate. The authors also studied the influence of the consumption rate of Portland cement and basalt fibre onto the structural quality ratio of the foamed fibre concrete.

DOI: 10.22227/1997-0935.2012.4.160 - 164

References
  1. Zhukov A.D., Chugunkov A.V. Rudnitskaya V.A. Reshenie tehnologicheskikh zadach metodami matematicheskogo modelirovaniya [Resolution of Technology-related Problems by Methods of Mathematical Modeling]. Moscow, MSUCE, 2011, 176 p.
  2. Zhukov A.D., Chugunkov A.V. Lokal'naya analiticheskaya optimizatsiya tehnologicheskikh protsessov [Local Analytical Optimization of Technology-related Processes]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 1, vol. 2, pp. 273—278.

Download

Solar grounds for the production of foamed concrete items

Vestnik MGSU 4/2014
  • Dauzhanov Nabi Tokmurzaevich - Kyzylorda State University Named after Korkyt Ata (KGU im. Korkyt Ata) Candidate of Technical Sciences, Associate Professor, Department of Architecture and Construction Production, Kyzylorda State University Named after Korkyt Ata (KGU im. Korkyt Ata), 29A Ayteke bi St., Kyzylorda, 120014, Kazakhstan; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Krylov Boris Aleksandrovich - Russian Academy of Architecture and Construction Sciences (RAASN) Doctor of Technical Sciences, Professor, Academician, Department of Construction Sciences, Russian Academy of Architecture and Construction Sciences (RAASN), 24 Bolshaya Dmitrovka, Moscow, 107031, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Aruova Lyazat Boranbaevna - Kyzylorda State University Named after Korkyt Ata (Korkyt Ata KSU) Doctor of Technical Sciences, Professor, Department of Architecture and Construction, Kyzylorda State University Named after Korkyt Ata (Korkyt Ata KSU), 29A Ayteke bi str., Kyzylorda, 120014, Kazakhstan; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 79-86

The method and low-energy intensive technology of manufacturing products of foamed concrete are developed providing bringing-in a solar energy in technological conversion for reducing the energy consumption for heat treating, allowing to obtain high quality products at low cost with a diurnal cycle of production. Thereby, the use of a minimal amount of additional electrical energy is stipulated for providing a consistence of temperature fields in the cross section of helio heated products in landfills in combination with solar energy. Until now, many scientists have investigated the issues of using the renewable energy resources in the construction industry including solar ones, for replacement of conventional fuels applied in the thermal treatment of concrete products and structures. However, pursuant to the analysis of the scientific literature, all known research studies and developments in this area are devoted to heliothermal treatment of conventional concrete, and at the same time the traditional methods for acceleration of hardening requiring significant energy consumption are still in use in production of such an effective building material as foam concrete. There are various methods of heliothermal treatment including combined ones, but they are not applicable in their production due to the specific characteristics (unlike conventional concrete) of manufacturing technology, the used components, the particular rheological properties, as well as a porous structure of foam concrete. Both the examining the use of solar energy in acceleration of foam concrete hardening according to the literature data and the pre-studies have revealed a problem under unilateral heliothermal treatment of foam concrete. It is found out that the temperature field of across thickness of the massif, especially during the first 7-8 hours, is irregular, that significantly affects the process of heating moisture transfer occurring within the massif. According to the previously obtained data, there is the highest uniformity of moisture distribution efficiency and thereby a maximum strength uniformity of products under bilateral supply of heat to the hardening concrete. On this basis, it is advisable to use both solar and additional electric energy having impact of periodic and short duration on the hardening concrete for the intensification of the foam products hardening in landfills in order to ensure a uniform heating of products and reducing temperature gradients. Calculations showed that the duration of landfill operation on production of foam concrete products for the areas of Central Asia located in 46° N is 8 months per year, i.e. from March to October. In order to achieve the greatest effect in the process of applying the developed method for complex heliothermal treatment of foam concrete products, there is a need in a steady warm and clear weather when the ambient temperature at noon reaches the values higher than +20 °C. It is found out that high strength characteristics can be achieved under optimum combination of exotherm of cement in foam concrete with soft modes of warming-up and cooling down of products.

DOI: 10.22227/1997-0935.2014.4.79-86

References
  1. Pinsker V.A. Sostoyanie i problemy proizvodstva i primeneniya yacheistykh betonov [State and Problems of Production and Use of Cellular Concrete]. Yacheistye betony v sovremennom stroitel'stve: sbornik dokladov Mezhdunarodnoy nauchno-prakticheskoy konferentsii, 21—23 aprelya 2004 g. [Cellular Concrete in the Modern Construction. Collection of the International Scientific and Practical Conference, April 21—23, 2004]. Saint Petersburg, 2004, pp. 1—5.
  2. Korotyshevski O.V. Novaya resursosberegayushchaya tekhnologiya po proizvodstvu vysokoeffektivnykh penobetonov [New Resource-saving Technology for the Production of High-performance Foam Concretes]. Stroitel'nye materialy [Building Materials]. 1999, no. 2, pp. 37—38.
  3. Zasedatelev I.B. Rol' klimaticheskikh faktorov v sozdanii energosberegayushchikh tekhnologiy sbornogo zhelezobetona [The Role of Climatic Factors in the Creation of Energy-saving Technologies of Precast Concrete]. Tekhnologiya betonnykh rabot v usloviyakh sukhogo zharkogo klimata: materialy IV Vsesoyuznogo koordinatsionnogo soveshchaniya po probleme [Materials of 6th All-Union Coordination Meeting on the Issue "Technology of Concrete Works in Dry Hot Climate]. Dushanbe, 1988, pp. 20.
  4. Mironov S.A., Malinskiy E.N. Osnovy tekhnologii betona v usloviyakh sukhogo zharkogo klimata [The Basics of Concrete Technology in Dry Hot Climate]. Moscow, Stroyizdat, 1985, 317 p.
  5. Baron S. The Embedded Energy Costs in Solar Energy Systems. Solar & Wind Technology. 1984, vol. 1, no. 1, pp. 63—69. DOI: 10.1016/0741-983X(84)90035-3.
  6. Krylov B.A., Zasedatelev I.B., Malinskiy E.N. Izgotovlenie sbornogo zhelezobetona s primeneniem gelioform [Production of Prefabricated Reinforced Concrete by Using Helioshapes]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1984, no. 3, pp. 17—18.
  7. Podgornov N.I. Termoobrabotka betona s ispol'zovaniem solnechnoy energii [Heat Treatment of Concrete Using Solar Energy]. Moscow, ASV Publ., 2010, 328 p.
  8. Lu Changgeng. Industrial Production of Concrete Components in China. Betonwerk+Fertigteil-Technik (Concrete Precasting Plant and Technology). 1986, no. 5, 56 p.
  9. Geller Steven N. Review of Accelerated Curing in the Concrete Pipe Industry. Concr. Ynt. Des. and Constr., 1983, no. 8, pp. 43—45.
  10. Greenwood K. Concrete Manufacture and Supplying in Hot Climates. Precast Concrete. 1979, vol. 10, no. 5, pp. 219—220.
  11. Krylov B.A. Solnechnaya energiya i perspektivy ee ispol'zovaniya dlya intensifikatsii tverdeniya betona [Solar Energy and Prospects of its Application for Concrete Hardening Intensification]. Ispol'zovanie solnechnoy energii v tekhnologii betona: Materialy soveshchaniya po probleme [Materials of the Meeting on the Problem "The Use of Solar Energy in Concrete Technology"]. Ashkhabad, 1982, pp. 20—25.
  12. Aruova L.B., Dauzhanov N.T. Ispol'zovanie solnechnoy energii dlya geliotermoobrabotki betona v Respublike Kazakhstan [Using Solar Energy for Heat Treatment of Concrete in Kazakhstan]. Alitinform Publ., 2011, no. 3 (20), pp. 14—18. Available at: http://www.alitinform.ru/zh_pdf/20.pdf.
  13. Malinina L.A. Teplovlazhnostnaya obrabotka tyazhelogo betona [Stream Treatment of Heavy Concrete]. Moscow, Stroyizdat Publ, 1977, 160 p.
  14. Kulikova L.V. Osnovy ispol'zovaniya vozobnovlyaemykh istochnikov energii [Fundamentals of Using Renewable Energy]. Moscow, 2008. Available at: http://ecoclub.nsu.ru/altenergy/common/common2_3.shtm. Date of access: 28.01.14.
  15. Posobie po geliotermoobrabotke betonnykh i zhelezobetonnykh izdeliy s primeneniem svetoprozrachnykh i teploizoliruyushchikh pokrytiy (SVITAP) k SNiP 3.09.01—85 [The Manual for Heat Treatment of Concrete and Concrete Products Using Translucent and Thermal Barrier Coatings (SVITAP) to Construction Requirements SNiP 3.09.01—85]. Moscow, NIIZhB Publ., 1987, 14 p.
  16. Dauzhanov N.T., Krylov B.A. Maloenergoemkaya tekhnologiya termoobrabotki izdeliy iz penobetona na poligonakh s pomoshch'yu solnechnoy energii [Low-Energy Thermal Processing Technology of Foamed Concrete Products in Landfills Using Solar Energy]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2014, no. 3, pp. 149—157.

Download

FOAM CONCRETE REINFORCEMENT BY BASALT FIBRES

Vestnik MGSU 6/2012
  • Zhukov Aleksey Dmitrievich - Moscow State University of Civil Engineering (MSUCE) Candidate of Technical Sciences, Professor, Department of Technology of Finishing and Insulation Materials, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rudnitskaya Viktoriya Aleksandrovna - Moscow State University of Civil Engineering (MSUCE) master student, Department of Technology of Finishing and Insulation Materials, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 83 - 87

The authors demonstrate that the foam concrete performance can be improved by dispersed reinforcement, including methods that involve basalt fibres. They address the results of the foam concrete modeling technology and assess the importance of technology-related parameters. Reinforcement efficiency criteria are also provided in the article.
Dispersed reinforcement improves the plasticity of the concrete mix and reduces the settlement crack formation rate. Conventional reinforcement that involves metal laths and rods demonstrates its limited application in the production of concrete used for thermal insulation and structural purposes. Dispersed reinforcement is preferable. This technology contemplates the infusion of fibres into porous mixes. Metal, polymeric, basalt and glass fibres are used as reinforcing components.
It has been identified that products reinforced by polypropylene fibres demonstrate substantial abradability and deformability rates even under the influence of minor tensile stresses due to the low adhesion strength of polypropylene in the cement matrix.
The objective of the research was to develop the type of polypropylene of D500 grade that would demonstrate the operating properties similar to those of Hebel and Ytong polypropylenes. Dispersed reinforcement was performed by the basalt fibre. This project contemplates an autoclave-free technology to optimize the consumption of electricity. Dispersed reinforcement is aimed at the reduction of the block settlement in the course of hardening at early stages of their operation, the improvement of their strength and other operating properties. Reduction in the humidity rate of the mix is based on the plasticizing properties of fibres, as well as the application of the dry mineralization method.
Selection of optimal parameters of the process-related technology was performed with the help of G-BAT-2011 Software, developed at Moscow State University of Civil Engineering. The authors also provide their overview of intellectual property rights and an economic efficiency assessment.

DOI: 10.22227/1997-0935.2012.6.83 - 87

References
  1. Novitskiy A.G., Efremov M.V. Volokno iz gornykh porod dlya armirovaniya betonov [Rock Fibres Designated for Concrete Reinforcement]. Proceedings of the 7th All-Russian Scientific and Practical Conference in Belokurikha. Moscow, Khimmash Publ., 2007, pp. 116—120.
  2. Sakharov G.P., Strebitskiy V.P., Voronin V.A. Novaya effektivnaya tekhnologiya neavtoklavnogo porobetona [New Effective Technology of the Autoclave-Free Concrete]. Stroitel’nye materialy i obrudovanie tekhnologii XX veka [Building Materials and Equipment Technologies of the 20th Century]. 2002, no. 6, pp. 28—29.
  3. Zhukov A.D., Chugunkov A.V. Lokal’naya analiticheskaya optimizatsiya tekhnologicheskikh protsessov [Local Analytical Optimization of Technology-related Processes]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 4, pp. 273—279.

Download

WATER CONTENT IN DISPERSE SYSTEMS DESIGNATED FOR PRODUCTION OF FOAM-CONCRETE COMPOSITES

Vestnik MGSU 11/2012
  • Kostylenko Konstantin Igorevich - Rostov State University of Civil Engineering (RGSU) postgraduate student, Department of Construction Materials, Rostov State University of Civil Engineering (RGSU), 162 Sotsialisticheskaya st., Rostov-on-Don, 344000, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kaptsov Petr Vladimirovich - Moscow State University of Civil Engineering (MGSU) Director of Laboratory, postgraduate student, Department of Construction Materials, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 168 - 171

The authors have analyzed types of cohesion between water and fillers that demonstrate
varied granulation. The authors have proven the influence of the moisture content in fillers onto their
packing density.
An experimental and theoretical analysis of influence of types of cohesion between the water
and surface particles of the liquid phase in the period of initial structurization of foam-concrete
composites represents an intermediate step on the way to identification of patterns of formation of
structures that have perfect physical and mechanical properties.
The experimental research consists in the moisture treatment of disperse granular particles
of sand and dense limestone of different fractions. The experimental research has proven that the
packed density of dry fillers depends on the size of elementary particles; therefore, the packed
density depends not only on the type of packing of particles, but also on correlations between their
gravitational and surface energy.
The amount of water consumed in the course of formation of adsorption films has turned out
to be proportionate to the per-unit surface of granular particles. The moment when the particle surface
was filled with the adsorption moisture was registered based on the minimal average density
in cases of the varied moisture content in the materials under research. Each granular composition
demonstrated higher parameters of average density upon formation of the adsorption layer of moisture
due to the presence of the film characterized by higher density.
The growth of average density in the absence of any water loss proves that the granular system
has a film moisture content that demonstrates the properties of a solid phase.
The findings have proven that the degree of dispersion of granular particles regulates the film
moisture content in the composites designated for the production of foam-concretes. The above
property ensures production of composites that have a high workability and a stable aggregative
state.

DOI: 10.22227/1997-0935.2012.11.168 - 171

References
  1. Shakhova L.D. Tekhnologiya penobetona. Teoriya i praktika. [Technology of Foam Concrete. Theory and Practice.] Moscow, ASV Publ., 2010, 248 p.
  2. Morgun L.V., Morgun V.N., Smirnova P.V. O vzaimosvyazi mezhdu termodinamicheskimi svoystvami vody i penobetonov [Correlation between Thermodynamic Properties of Water and Foam Concretes]. Stroitel’nye materialy [Construction Materials]. 2009, no. 1, pp. 14—16.
  3. Smirnova P. V. Temperaturnyy faktor v tekhnologii fi bropenobetona [Factor of Temperature within the Framework of Technology of Foam Concrete]. Rostov-on-Don, 2010, 151 p.
  4. Kostylenko K.I., Pushenko O.V., Morgun V.N. Osobennosti formirovaniya penostruktur v tsementno-peschanykh smesyakh [Peculiarities of Formation of Foam Structures of Cement and Sand Mixtures]. Collected works of International Scientific and Practical Conference “Sworld”. Odessa, 2012, no. 2, vol. 26, pp. 19—22.
  5. Volzhenskiy A.V. Mineral’nye vyazhushchie veshchestva [Mineral Binders]. Moscow, Stroyizdat Publ., 1979, 476 p.
  6. Morgun V.N. Teoreticheskoe obosnovanie zakonomernostey konstruirovaniya struktury penobetonov [Theoretical Substantiation of Regularities of Structurization of Foam Concretes]. Nauka i innovatsii v stroitel’stve SIB-2008 [Science and Innovations in Civil Engineering SIB-2008]. Collected papers of International Congress. Vol. 1. Sovremennye problemy stroitel’nogo materialovedeniya i tekhnologii. [Present-day Problems of Material Science and Technology]. Voronezh, Voronezh GASA Publ., 2008, pp. 333—337.
  7. Kvlividze V.I. Izuchenie adsorbirovannoy vody metodom yadernogo magnitnogo rezonansa [Study of Adsorbed Water Using Method of Nuclear Magnetic Resonance]. Svyazannaya voda v dispersnykh sistemakh [Adhesive Water in Disperse Systems]. 1970, no. 1, pp. 41—54.
  8. Savel’ev I.V. Kurs obshchey fi ziki [Course of General Physics]. Moscow, Nauka Publ., 1989, vol. 1, 352 p.

Download

Results 1 - 5 of 5