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RESEARCH OF BUILDING MATERIALS

Efficiency of fiber reinforced concrete application in structures subjected to dynamic effects

Vestnik MGSU 3/2014
  • Morozov Valeriy Ivanovich - Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU) Doctor of Technical Sciences, Professor, head, Department of Reinforced Concrete and Masonry Structures, corresponding member of Russian Academy of Architecture and Construction Sciences, Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU), 4, 2 Krasnoarmeiskaya St., 190005, St. Petersburg, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pukharenko Yuriy Vladimirovich - Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU) Doctor of Technical Sciences, Professor, head, Department of Building Materials Technology and Metrology, councilor of Russian Academy of Architecture and Construction Sciences, Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU), 4, 2 Krasnoarmeiskaya St., 190005, St. Petersburg, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 189-196

Fiber reinforced concretes possess high strength under dynamic loadings, which include impact loads, thanks to their high structural viscosity. This is the reason for using them in difficult operating conditions, where increasing the performance characteristics and the structure durability is of prime importance, and the issues of the cost become less significant. Applying methods of disperse reinforcement is most challenging in case of subtle high-porous materials on mineral binders, for example foamed concrete. At the same time, the experiments conducted in Russia and abroad show, that also in other cases the concrete strength resistance several times increases as a result of disperse reinforcement. This doesn't depend on average density of the concrete and type of fiber used. In the article the fibre reinforced concrete impact resistance is analysed. Recommendations are given in regard to fibre concrete application in manufacture of monolithic floor units for industrial buildings and precast piles.

DOI: 10.22227/1997-0935.2014.3.189-196

References
  1. Pukharenko Yu.V. Nauchnye i prakticheskie osnovy formirovaniya struktury i svoystv fibrobetonov: avtoreferat dissertatsii doktora tekhnicheskikh nauk [Scientific and Practical Fundamentals of Fiber Concrete Structure and Properties. Thesis Abstract of the Doctor of Technical Sciences]. Saint Petersburg, 2004, 46 p.
  2. Lobanov I.A., Pukharenko Yu.V., Gurashkin Yu.A. Udarostoykost' fibrobetonov, armirovannykh nizkomodul'nymi sinteticheskimi voloknami [Shock Resistance of Fiber Concretes, Reinforced by Low-modulus Synthetic Fibers]. Tekhnologiya i dolgovechnost' dispersno-armirovannykh betonov [Technology and Durability of Fiber Reinforced Concretes]. Leningrad, LenZNIIEP Publ., 1984, pp. 92—96.
  3. Rabinovich F.N. Kompozity na osnove dispersno-armirovannykh betonov. Voprosy teorii i proektirovaniya, tekhnologii, konstruktsii [Composites Based on Fibre Reinforced Concretes. Problems of Theory and Design, Technologies, Structures]. Moscow, ASV Publ., 2004, 560 p.
  4. Tefaruk Haktanir, Kamuran Ari, Fatih Altun, Cengiz D. Atis, Okan Karahan. Effects of Steel Fibers and Mineral Filler on the Water-tightness of Concrete Pipes. Cement and Concrete Composites. 2006, vol. 28, no. 9, pp. 811—816. DOI: 10.1016/j.cemconcomp.2006.06.002.
  5. Bhikshma V., Manipal K. Study on Mechanical Properties of Recycled Aggregate Concrete Containing Steel Fibers. Asian Journal of Civil Engineering (Building and Housing). 2012, vol. 13, no. 2, pp. 155—164.
  6. Bhikshma V., Singh J.L. Investigations on Mechanical Properties of Recycled Aggregate Concrete Containing Steel Fibers. Indian Concrete Institute Journal. 2010, no. 4—9 (10), pp. 15—19.
  7. Shah P.S., Rangan V.K. Effect of Fiber Addition on Concrete Strength. Indian Concrete Journal. 1994, vol. 5, no. 2—6, pp. 13—21.
  8. Rasheed M.H.F., Agha A.Z.S. Analysis of Fibrous Reinforced Concrete Beams. Engineering and Technical Journal. 2012, no. 30 (6), pp. 974—987.
  9. Morozov V.I., Opbul E.K. Raschet prochnosti izgibaemykh fi brozhelezobetonnykh elementov s vysokoprochnoy armaturoy bez predvaritel'nogo napryazheniya [Strength Calculation of Bending Fiber Reinforced Concrete Elements with High-strength Reinforcement without Preliminary Strain]. Doklad 62 nauchnnoy konferentsii [Report of the 62nd Scientific Conference]. Saint Petersburg, SPbGASU Publ., 2005, Part 1, pp. 210—214.
  10. RTM-17-01—2002. Rukovodyashchie tekhnicheskie materialy po proektirovaniyu i primeneniyu stalefi brobetonnykh stroitel'nykh konstruktsiy [RTM-17-01—2002. Technical Guides on Designing and Calculating Steel Fiber Reinforced Concrete Building Structures]. Moscow, 2003.
  11. Rodov G.S., Leykin B.V., Sterin V.S. Opyt primeneniya stal'nykh fibr diametrom 2 mm i fibr iz otrabotannykh trosov dlya proizvodstva zabivnykh svay: Ekspress-inform [Experience of Using Steel Fibers of 2 mm Diameter and Fibers Made of Used Wires for Producing Drive Piles: Express-Inform]. Stroitel'stvo v rayonakh Urala i Zapadniy Sibiri SSSR. Seriya: Sovershenstvovanie bazy stroitel'stva [Construction in the Regions of South Ural and Western Siberia of the USSR]. TsBNTI Publ. 1987, no. 1, pp. 31—33.

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Experimental determination of crack resistance characteristics of fiber reinforced concrete

Vestnik MGSU 5/2014
  • Zertsalov Mikhail Grigor'evich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Soil Mechanics and Geotechnics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (495) 781-80-07; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Khoteev Egor Anatol'evich - Moscow State University of Civil Engineering (MGSU) Master, postgraduate student, Department of Soil Mechanics and Geotechnics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (495) 781-80-07; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 91-99

The samples of fiber reinforced concrete with different fiber concentration, types of fiber, class of concrete were tested. The values of the critical stress intensity factors were determined as well as the strength characteristics of fiber-reinforced concrete of various compositions. Tests were carried out by bending the beams of 400x100x100 mm with a cut. Critical stress intensity factor was determined with the help of the value of the breaking load. The regularities of the influence of the type and concentration of fibers on the strength characteristics of the fiber reinforced concrete were stated. The authors identified key properties of steely and polypropylene fibers and offered their comparison. From these experiments we obtained data for further use in theoretical studies of fiber reinforced concretes structures. This research revealed common patterns of change in the properties of fiber reinforced concrete, depending on the composition. The advantages of different types of fibers were discussed. Valid formula for determining the critical stress intensity factor was found. Adding fiber in different concentrations to the concrete mix increase the tensile strength 3.5-4.5 times for steel fibers and 2-2.5 times for polypropylene fibers. Polypropylene fiber addition leads to decrease in compressive strength of the concrete of up to 8 %, the steel fibers addition, on the contrary, to increase in the compressive strength of concrete up to 20 %. Increase in tensile strength is observed mostly for low-strength concrete. In order to ensure uniform distribution of fibers in the volume of concrete specific methods should be applied.

DOI: 10.22227/1997-0935.2014.5.91-99

References
  1. Antropova E.A., Drobyshev B.A., Amosov P.V. Svoystva modifitsirovannogo stalefibrobetona [Properties of the Modified Steel Fiber Concrete]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2002, no. 3, pp. 3—6.
  2. Bocharnikov A.S., Korneev A.D. Tekhnologicheskie faktory, vliyayushchie na mikro- i makrostrukturu peskobetonnoy matritsy i prochnostnye svoystva stalefibrobetona [Technological Factors Affecting Micro-and Macrostructure of Sand Concrete Matrix and Mechanical Properties of Steel Fiber Concrete]. Tekhnologii betonov [Concrete Technologies]. 2005, no. 3, pp. 62—63.
  3. Braune Ya.A., Kravinskis V.K., Spilva M.O. Opredelenie uprugikh kharakteristik deformiruemosti dispersno-armirovannogo betona [Determination of Elastic Characteristics of Fiber Concrete Deformability]. Proektirovanie i optimizatsiya konstruktsiy inzhenernykh sooruzheniy [Design and Optimization of Engineering Structures]. Riga, RPI Publ., 1986, pp. 87—97.
  4. Braune Ya.A., Kravinskis V.K., Filipsons V.O. Statisticheskiy analiz raspredeleniya armatury i prochnost' stalefibrobetona [Statistical Analysis of the Distribution of Reinforcement and Strength of Steel Fiber Concrete]. Proektirovanie i optimizatsiya konstruktsiy inzhenernykh sooruzheniy [Design and Optimization of Engineering Structures]. Riga, RPI Publ., 1982, pp. 89—95.
  5. Volkov I.V. Fibrobeton sostoyanie i perspektivy primeneniya v stroitel'nykh konstruktsiyakh [Fiber Concrete Condition and Prospects of Application in Building Structures]. Stroitel'nye materialy, oborudovanie, tekhnologii XXI veka [Building Materials, Equipment, Technologies of the 21st Century]. 2004, no. 5, pp. 24—25.
  6. Kosarev V.M. Raschet prochnosti po normal'nym secheniyam izgibaemykh elementov s khaotichnym diskretnym armirovaniem [Strength Calculation for Normal Sections of Bent Elements with Chaotic Discrete Reinforcement]. Fibrobeton i ego primenenie v stroitel'stve [Fibrous Concrete and its Application in Construction]. Moscow, NIIZhB Publ., 1979, pp. 20—26.
  7. Kurbatov L.G., Popov V.I. Treshchinostoykost' i raskrytie treshchin v izgibaemykh stalefibrobetonnykh elementakh [Crack Resistance and Crack Opening in Bent Steel Fiber Concrete Elements]. Prostranstvennye konstruktsii v grazhdanskom stroitel'stve [Spatial Design in Civil Engineering]. Leningrad, LenZNIIEP Publ., 1982, pp. 33—42.
  8. Rusanov V.E. Opredelenie prochnostnykh i deformativnykh svoystv stalefibrobetona dlya rascheta tonnel'nykh obdelok [Determination of Strength and Deformation Properties of Steel Fiber Concrete for Tunnel Lining Calculation]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 2, pp. 189—197.
  9. Rusanov V.E. K otsenke effektivnosti primeneniya fibrobetona v sbornykh tonnel'nykh obdelkakh [Evaluating the Effectiveness of Fiber Reinforced Concrete Application in Precast Tunnel Lining]. Transportnoe stroitel'stvo [Transport Construction]. 2010, no. 3, pp. 13—16.
  10. Kagan M. Sravnenie fakticheskoy prochnosti na szhatie blokov iz betona i stalefibrobetona [Comparison of the Actual Compressive Strength of Concrete and Steel Fiber Concrete Blocks]. Metrostroy [Constructing Metro]. 1987, no. 3, pp. 19—22.
  11. Rizkalla Sami, Hassan Tarek. Effectiveness of FRP for Strengthening Concrete Bridges. Structural Engineering International. 2002, vol. 12, no. 2, pp. 89—95. DOI: http://dx.doi.org/10.2749/101686602777965577.
  12. Colin D. Johnston. Steel Fiber Reinforced Concrete. CoComposits. 1982, no. 2, pp. 113—121.
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