HIGH-QUALITY SELF-COMPACTING CONCRETE WITH COAL BURNING WASTE

Вестник МГСУ 12/2017 Том 12
  • Bazhenov Yuriy Mikhaylovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Head of the Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, 129337, Russian Federation.
  • 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.
  • Alimov Lev Alekseevich - 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.
  • Bakhrakh Anton Mikhaylovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Professor of the Department of construction of thermal and nuclear power facilities, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, 129337, Russian Federation.
  • Larsen Oksana Aleksandrovna - Moscow State University of Civil Engineering (National Research University) (MGSU) Bachelor, Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, 129337, Russian Federation.
  • Solov'ev Vitaliy Nikolaevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Professor of the Department of Construction of Thermal and Nuclear Power Facilities, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Nguen Dyk Vin Kuang - Moscow State University of Civil Engineering (National Research University) (MGSU) Postgraduate student, Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, 129337, Russian Federation.

Страницы 1385-1391

Subject: nowadays self-compacting concretes (SCC), the use of which requires no additional compaction, have become widespread for use in densely-reinforced structures and hard-to-reach places. In self-compacting concretes, finely-ground admixtures-microfillers are widely used for controlling technological properties. Their introduction into the concrete mix allows us to obtain more dense structure of concrete. The influence of micro-fillers on water consumption and plasticity of concrete mix, on kinetics of strength gain rate, heat release and corrosion resistance is also noticeable. Research objectives: the work focuses on the development of composition of self-compacting concrete with assigned properties with the use of fly ash based on coal burning waste, optimized with the help of experimental design method in order to clarify the influence of ash and cement quantity, sand size on strength properties. Materials and methods: pure Portland cement CEM I 42.5 N was used as a binder. Crushed granite of fraction 5…20 mm was used as coarse aggregate, coarse quartz sand with the fineness modulus of 2.6 and fine sand with the fineness modulus of 1.4 were used as fillers. A superplasticizer BASF-Master Glenium 115 was used as a plasticizing admixture. The fly ash from Cherepetskaya thermal power plant was used as a filler. The study of strength and technological properties of self-compacting concrete was performed by using standard methods. Results: we obtained three-factor quadratic dependence of strength properties on the content of ash, cement and fraction of fine filler in the mix of fine fillers. Conclusions: introduction of micro-filler admixture based on the fly ash allowed us to obtain a concrete mix with high mobility, fluidity and self-compaction property. The obtained concrete has high strength characteristics, delayed strength gain rate due to replacement of part of the binder with ash. Introduction of the fly ash increases degree of hydration of Portland cement due to the greater water retention capacity, and also contributes to reduction in total capillary porosity of SCC structure.

DOI: 10.22227/1997-0935.2017.12.1385-1391

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FINE CONCRETE FOR HYDRAULIC ENGINEERING MODIFIEDBY A MULTI-COMPONENT ADDITIVE

Вестник МГСУ 8/2013
  • Aleksashin Sergey Vladimirovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Technology of Binders and Concretes, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Bulgakov Boris Igorevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of the Technology of Binders and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 97-103

This article covers the design of an advanced multi-component additive and the study of its influence produced on the properties of fine-grained concrete. The authors also provide data on the earlier studies of the effect produced by domestic superplasticizers on the plasticity of fine-grained concrete mixtures and the curing behaviour of plasticized fine concretes. Russian-made superplasticizer Khimkom F1 was used to retain the plasticity of the fine concrete under consideration. Khimkom F1 produces a better effect on concrete curing than Polyplast SP-1, Cemactive SU-1, and Linomix SP 180-2. Superplasticizer Khimkom F1, as opposed to plasticizers based on lingo-sulfonate or naphthalene, for example S-3, has no bad odour; it is non-corrosive if applied to steel reinforcement inside concrete. The research has proved that the optimal amount of Khimkom F1 is 1.2% of the total amount of the binder.Metakaolin fume was used to improve the microstructure of the concrete, including its strength, waterand frost-resistance. Improvement of the above properties was proved in the course of the experiment. Its optimal content equals to 15% of the total amount of the binder. The study of the two domestically made water repellents (Sofexil40 and Sofexil 60-80) was conducted to identify and to compare their water and frost resistance. Experimental findings have proven that Sofexil 40 produces higher influence on the properties of the fine concrete, used for hydraulic engineering purposes, than Sofexil 60-80. The optimal content of the water repellent is 0.2% of the binder content. Sofexil 40 must be dissolved in the water in advance. Finally, the authors provide their experimental findings in terms of the optimal composition of the fine hydraulic concrete having pre-set properties.

DOI: 10.22227/1997-0935.2013.8.97-103

Библиографический список
  1. Aleksashin S.V., Bulgakov B.I. Poluchenie melkozernistykh betonov s vysokimi ekspluatatsionnymi pokazatelyami [Production of Fine-grained High Performance Concrete]. Sbornik nauchnykh trudov Instituta stroitel'stva i arkhitektury [Collection of Research Papers of the Institute of Construction and Architecture]. Moscow, KYuG Publ., 2012, pp. 12—13.
  2. Lukuttsova N.P., Pykin A.A., Chudakova O.A. Modifitsirovanie melkozernistogo betona mikro- i nanorazmernymi chastitsami shungita i dioksida titana [Modification of Fine-grained Concrete by Micro Particles of Schungite and Titanium Dioxide]. Vestnik BGTU im. V.G. Shukhova [News Bulletin of Belgorod Shukhov State Technical University]. 2010, no. 2, pp. 67—70
  3. Falikman V.R. New High Performance Polycarboxilate Superplasticizers Based on Derivative Copolymers of Maleinic Acid. 6th International Congress “GLOBAL CONSTRUCTION” Advances in Admixture Technology. Dundee, 2005, pp. 41—46.
  4. Lukuttsova N.P. Nanomodifitsiruyushchie dobavki v beton [Nano-modifying Additives for Concrete]. Stroitel'nye materialy [Construction Materials]. 2010, no. 9, pp. 101—104.
  5. Bazhenov Yu.M., Lukuttsova N.P., Matveeva E.G. Issledovanie nanomodifitsirovannogo melkozernistogo betona [Research into Nano-modified Fine Concrete]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, vol. 2, no. 4, pp. 415—418.
  6. Shah S.P., Ahmad S.H. High Performance Concrete: Properties and Applications. McGraw-Hill, Inc., 1994, 403 p.
  7. Ramachandran V.S. Dobavki v beton: spravochnoe posobie [Additives for Concrete: Reference Book]. Moscow, Stroyizdat Publ., 1988, 291 p.
  8. Commission 42-CEA. Properties Set Concrete at Early Ages. State-of-the-art-report. Materiaux et Constructions. 1981, vol. 14, no. 4, p. 15.
  9. Fennis S.A.A.M., Walraven J.C. Design of Ecological Concrete by Particle Packing Optimization. Delft, Delft University of Technology, 2010, pp. 115—144.
  10. Batrakov V.G. Modifitsirovannye betony. Teoriya i praktika [Modified Concretes. Theory and Practice.] Moscow, Tehnoproekt Publ., 1998, 560 p.

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EFFICIENT NON-DESTRUCTIVE METHOD OF CONTROL OVER THE FROST-RESISTANCE OF CONCRETES DESIGNATED FOR HYDRAULIC ENGINEERING STRUCTURES

Вестник МГСУ 8/2012
  • Popov Valeriy Petrovich - Samara State University of Architecture and Civil Engineering Doctor of Technical Sciences, Professor 8 (846) 242-17-84, Samara State University of Architecture and Civil Engineering, 194 Molodogvardeyskaya str., Samara, 443001, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 139 - 142

The author considers the problem of control over the frost resistance as the most important
characteristic of concretes designated for hydraulic engineering structures. His method is based on
the identification of correlation between the frost resistance and the Poisson ratio. The value of the
Poisson ratio is measurable through the employment of the ultra-sound method.
The proposed methodology contemplates the following sequence of acts. First, the value of
the Poisson ratio of air-dried samples of concrete is identified through the employment of the ultrasound
method. Thereafter, samples are exposed to cyclic freezing and thawing. Based on the testing
results, correlation between the Poisson ratio values and the frost resistance of the concrete is
identified. Further, the same ultrasound method is used to find out the values of the Poisson ratio of
the hydraulic engineering structures on site to identify the value of the frost resistance of the concrete
on the basis of the correlation identified earlier.
Mass produced ultrasound testing devices are to be used for the above purposes. They must
have screens, and their ultrasound range must fit concretes. Poisson ratio values are identified
through the penetration of the ultrasound signal through the thickness of a concrete element under
control. Sensors are to be positioned at the angle of 45°, and the time of travel of longitudinal and
shear (lateral) ultra-sound waves through the thickness of a concrete sample or a concrete element
is measured. The time of travel of longitudinal waves is measured on the basis of the value of the
first signal, while shear waves are measured on the basis of the phase transition of ultrasound
waves. Thereafter, velocities of waves are calculated pursuant to the methodology proposed by the
author. It is noteworthy that the accuracy of the proposed method is quite high, and the margin of
error does not exceed 3 %.

DOI: 10.22227/1997-0935.2012.8.139 - 142

Библиографический список
  1. GOST 10060—95. Betony. Metody opredeleniya morozostoykosti. [State Standard 10060-95. Concretes. Methods of Identification of Their Frost Resistance].
  2. Popov V.P. Prognozirovanie resursa dolgovechnosti betona akusticheskimi metodami na osnove mekhaniki [Projection of Durability of Concretes by Mechanics-based Acoustic Methods]. St.Petersburg, PGUPS [Petersburg State Transport University]. 1998, 247 p.
  3. MI 11-74. Metodika po opredeleniyu prochnostnykh i deformatsionnykh kharakteristik pri odnoosnom kratkovremennom szhatii [MI 11-74. Method of Identification of Strength and Deformation-related Properties in the Event of a Single-Axis Short-Term Compression]. Moscow, Standarty Publ., 1975, 68 p.
  4. Moskvin V.M., Kapkin M.M., Savitskiy A.N., Yarmakovskiy V.N. Beton dlya stroitel’stva v surovykh klimaticheskikh usloviyakh [Concrete Designated for Construction In the Unfavourable Climatic Environment]. Leningrad, Stroyizdat Publ., 1973, 167 p.
  5. Berg O.Ya. Fizicheskie osnovy teorii prochnosti betona i zhelezobetona [Basic Physics That Underlies the Strength of Concrete and Reinforced Concrete]. Moscow, Gosstroyizdat Publ., 1961, 125 p.
  6. Zaytsev Yu.V. Modelirovanie deformatsiy i prochnosti betona metodami mekhaniki razrusheniya [Modeling of Concrete Deformations and Strength through the Employment of Methods of Fracture Mechanics]. Moscow, Stroyizdat Publ., 1982, 196 p.

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RESEARCHES OF WORKING LIFE OF FOAM POLYSTYRENE OF BUILDING APPOINTMENT

Вестник МГСУ 1/2012
  • Guyumdzhjan Perch Pogosovich - Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia Doctor of Technical Sciences, Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia, .
  • Kokanin Sergey Vladimirovich - Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia The teacher of Chair Fire preventive maintenance UNK "The State fire supervision" +7-(960)-513-34-24, Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia, 33, pr. Builders, Ivanovo, 153040; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Tsybakin Sergey Valerievich - Kostroma State Agricultural Academy (KSAA) Candidate of Technical Sciences, Associate Professor, Dean of the Faculty of Architecture and Civil Engineering, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.

Страницы 88 - 93

Results of experimental researches of physicomechanical properties of foam polystyrene thermal insulation materials are presented in article. The operational resource was defined on materials subject to ageing, action of liquid excited environments and atmospheric impacts. The destructive processes leading to destruction of foam polystyrene are revealed.

DOI: 10.22227/1997-0935.2012.1.88 - 93

Библиографический список
  1. Problemy i perspektivy primenenija penopolistirola v stroitel'stve (Informacija) [Problems and prospects of application of foam polystyrene in construction (Information)]. Stroitel'nye materialy [Building materials], 2011, ¹ 3, Pp. 68—69.
  2. Itogi kruglogo stola «Problemy i perspektivy primenenija penopolistirola v stroitel'stve» [The results of the round table "Problems and prospects of application of foam polystyrene in construction"]. RAABS. URL: http://www.raasn.ru.
  3. Pena dnej [Foam of days]. Stroitel'nyj jekspert [Construction expert]. 2011. no 3-4 (315). Pp. 13—15.

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