RESEARCH OF BUILDING MATERIALS

New generation waterproofing materials containing vollastonite-basedantigidron system

Vestnik MGSU 3/2013
  • Bezrukov Aleksey Vladimirovich - Moscow State University of Civil Engineering (MGSU) Deputy Director, Centre for Research into construction, design and technology of subterranean structures; postgraduate student, Department of Construction Materials, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lyapidevskiy Boris Vasil’evich - GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow) Candidate of Technical Sciences, Director, Centre for Research into construction, design and technology of subterranean structures, GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow), 8 Vinnitskaya St., Moscow, 119192, Russian Federation.
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 114-119

Major penetrating waterproofing mixtures represent dry mixtures of cement and sand having admixtures, or systems of mineral salts, used to block the structure of capillaries and pores of cement mortars and concretes. Thin layers of waterproofing mortars are applied to sufficiently porous surfaces. As a result, the water content is reduced in the course of hardening. This process causes contraction and cracks in the coating.The findings of the research performed by the authors have proven that waterproofing materials containing wollastonite-based Antigidron system comply with each basic requirement applicable to penetrating waterproofing materials, as their admixtures penetrate into the concrete to seal concrete pores and to generate insoluble crystals.The new Antigidron system has the following strengths. Each component of the proposed system is made in Russia. It has efficient operating properties, and its cost is1.5 — 2 times lower than the one of similar products.

DOI: 10.22227/1997-0935.2013.3.114-119

References
  1. Uretskaya E.A., Batyanovskiy E.I. Sukhie stroitel’nye smesi: materialy i tekhnologii. [Dry Construction Mixtures: Materials and Technologies]. Minsk, NPOOO «Strinko» Publ., 2001.
  2. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modifying Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-oy Mezhdunar. nauch.-tekhn. konf. [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004.
  3. Vikdorovich A.M. Produktsiya Dow Chemical dlya industrii stroitel’nykh materialov [Dow Chemical Products for the Industry of Construction Materials]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 10—12.
  4. Meshkov P.I., Mokin V.A. Sposoby optimizatsii sostavov sukhikh stroitel’nykh smesey [Methods of Optimization of Compositions of Dry Construction Mixtures]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 12—14.
  5. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Preimushchestva polimermineral’nykh sukhikh smesey i sovremennye konstruktivno-tekhnologicheskie sistemy zdaniy i stroitel’nye materialy [Strengths of Mineral Polymeric Dry Mixtures and Advanced Structural Systems of Buildings and Construction Materials]. Sbornik trudov BelNIIS [Collected works of Belarus Scientific and Research Institute of Civil Engineering]. Minsk, 1997, pp. 71—73.
  6. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Modifitsirovannye sukhie stroitel’nye «Polimiks» v sovremennom stroitel›stve [Polymix Modified Dry Construction Mixtures in Contemporary Civil Engineering]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 36—38.
  7. Biytts R., Lindernau Kh. Khimicheskie dobavki dlya uluchsheniya kachestva stroitel’nykh rastvorov [Chemical Additives to Improve the Quality of Building Mortars]. Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 13—15.
  8. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modification of Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-y Mezhdunar. nauch.-tekhn. konf [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004, pp. 30-35.
  9. Meshkov P.I., Mokin V.A. Ot gartsovki — k modifitsirovannym sukhim smesyam [From Lime and Sand Mixtures to Modified Dry Mixtures Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 34—35.
  10. Korneev V.I., Zozulya P.V. Slovar’ «Chto» est› «chto» v sukhikh stroitel›nykh smesyakh [Dictionary of Dry Construction Mixtures]. St. Petersburg, NP «Soyuz proizvoditeley sukhikh stroitel’nykh smesey» publ., 2004, 312 p.

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Influence of wollastonite on the mechanical strength of the cement stonemade of portland cement clinker

Vestnik MGSU 3/2013
  • Berdov Gennadiy Il’ich - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) Doctor of Technical Sciences, Professor, Department of Construction Materials and Specialized Technologies; +7 (913) 769-18-59, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation.
  • Il’ina Liliya Vladimirovna - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) Doctor of Technical Sciences, Professor, Department of Construction Materials and Specialized Technologies, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rakov Mikhail Andreevich - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) postgraduate student, Department of Construction Materials and Specialized Technologies, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 120-126

The authors have completed a research into the influence of wollastonite onto the strength of the cement stone, if the latter is freshly made or stored in the humid environment for four months. The authors believe that the optimal share of the wollastonite admixture is equal to 5…9 %.The strength of wollastonite-free clinker samples is not reduced, if the clinker is stored in the humid environment and exposed to heat and moisture treatment. Upon the expiry of the 28-days’ curing period, the strength of samples is down by 4 % in the regular environment. In this case, the wollastonite admixture (7 %) improves the strength of samples upon the expiry of the 28 days’ curing period and their strength goes up by28 %, while the strength of samples goes up by 17 % upon their exposure to heat and moisture treatment.The authors believe that the influence produced by wollastonite may be explained by the following reasons. In the event that freshly milled powder (clinker) is added, wollastonite produces its influence on the hydration process, as formation of new compounds (hydrates) is influenced by a strong adsorption field of wollastonite particles.If clinker is stored in the humid environment, its substantial share is subject to hydration and carbonization.

DOI: 10.22227/1997-0935.2013.3.120-126

References
  1. Ramachandran V.S., editor. Dobavki v beton [Concrete Admixtures]. Moscow, Stroyizdat Publ., 1988, 575 p.
  2. Kuznetsova T.V., Kuryashov I.V., Timashev V.V. Fizicheskaya khimiya vyazhushchikh materialov [Physical Chemistry of Binders]. Moscow, Vyssh. shk. publ., 1989, 384 p.
  3. Tsimermanis. L.–Kh.B. Termodinamika vlazhnostnogo sostoyaniya tverdeniya stroitel’nykh materialov [Thermodynamics of the Humid Condition in the Course of Curing of Construction Materials]. Riga, ZINATNE Publ., 1989, 247 p.
  4. Vest A. Khimiya tverdogo tela. Teoriya i prilozheniya. Ch. 1 [Solid Body Chemistry. Theory and Applications. Part 1.] Moscow, Mir Publ., 1988, 558 p.
  5. Volzhenskiy A.V., Burov Yu.S., Kolokol’nikov V.S. Mineral’nye vyazhushchie veshchestva [Mineral Binders]. Moscow, Stroyizdat Publ., 1979, 476 p.
  6. Kolbasov V.M., Leonov I.I., Sulimenko L.M. Tekhnologiya vyazhushchikh materialov [Technology of Binders]. Moscow, Stroyizdat Publ., 1987, 432 p.
  7. Il’ina L.V. Povyshenie ekspluatatsionnykh kharakteristik stroitel’nykh materialov na osnove tsementa dlitel’nogo khraneniya [Improvement of Performance Characteristics of Construction Materials Made of Long-storage Cement]. Novosibirsk, 2011, 351 p.
  8. Gorchakov G.I., Bazhenov Yu.M. Stroitel’nye materialy [Construction Materials]. Moscow, Stroyizdat Publ., 1986, 688 p.
  9. Berdov G.I., Il’ina L.V. Aktivatsiya tsementov deystviem mineral’nykh dobavok [Activation of Cements by Mineral Admixtures]. Mezhdunarodnyy zhurnal prikladnykh i fundamental’nykh issledovaniy [International Journal of Applied and Fundamental Research]. 2010, no. 9, pp. 55—58.

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Epoxy antifriction wollastonite-filled materials

Vestnik MGSU 3/2019 Volume 14
  • Gotlib Elena M. - Kazan National Research Technological University (KNRTU) Doctor of Technical Sciences, Professor, Professor Technology of synthetic rubber, Kazan National Research Technological University (KNRTU), 68 Karl Marx st., Kazan, 420015, Russian Federation.
  • Khasanova Аlmira R. - Kazan National Research Technological University (KNRTU) assistant of the Department of materials science, welding and industrial safety, Kazan National Research Technological University (KNRTU), 68 Karl Marx st., Kazan, 420015, Russian Federation.
  • Galimov Engel R. - Kazan National Research Technological University (KNRTU) Doctor of Technical Sciences, Professor, Head of the department of materials science, welding and industrial safety, Kazan National Research Technological University (KNRTU), 68 Karl Marx st., Kazan, 420015, Russian Federation.
  • Sokolova Аlla G. - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Associate Professor of foreign languages and professional languages Department, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 311-321

Introduction. Domestic mineral natural-origin filler ‘wollastonite’, also known as calcium methyl silicate, is widely used as a base for wear-resisting epoxy antifriction materials. Due to anisodiametric shape of its particles, wollastonite functions as a micro reinforcement fibre enhancing adhesion strength and wear resistance of epoxy compositions, improving their antifriction properties, especially when organomodifying by quaternary ammonium salts. In this regard, the investigation of the impact of chemical composition of such surfactants as quaternary ammonium salts on the properties of epoxy compound materials presents utmost interest for researchers developing low-friction materials. Materials and methods. Epoxy diane resin ED-20 was hardened with aminoalkylphenol AF-2. Content of epoxy hardener was determined by equimolar ratio of epoxy groups to amine groups. Domestic wollastonite of the grade Miwoll 10-97 was used as filler, particle length to the diameter correlated as 15:1. The wollastonite surface was activated with surfactants belonging to domestically produced quaternary ammonium salts. Wear resistance of specimens was tested by means of the vertical optical caliper IZV-1. Friction coefficient was estimated with the assistance of the computer-automated frictional machine CSM Instruments Tribometer. Adhesion strength of glue joint was determined as per GOST 28840-90 standard. Two bars of sheet aluminium were used as glued surfaces as per GOST 14759-69 standard. Results. Reduction of wear of epoxy coatings when modified with micro reinforcing wollastonite can be explained by the increase of cross-linking degree of the polymer. The length of alkyl radical of quaternary ammonium salts used for wollastonite surface activation affects the intervals between the epoxy links. As the quaternary ammonium salt chain length is growing, wear of epoxy materials is reducing. Introduction of the wollastonite containing metallic oxides in the epoxy composites increases wear resistance and adhesion strength and reduces coating friction coefficients. Conclusions. Hardened with the AF-2 and filled with the wollastonite of the Miwoll 10-97 grade, the epoxy compound materials have enhanced wear resistance and adhesion strength and lower friction coefficient. The best result is observed when applying wollastonite modified with a surfactant belonging to the class of quaternary ammonium salts. The wollastonite can be used for practical purposes as a perspective reinforcing agent for epoxy materials with improved wear resistance, enhanced adhesion to metals and reduced friction coefficient.

DOI: 10.22227/1997-0935.2019.3.311-321

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