23 11 2021 knauf gzhel Строительные материалы 800х85px v1

Analysis of the influence of the calcium chloride dispersity in mechanoactivated solution on structure and characteristics of cement stone

Number of journal: №1-2-2016


DOI: https://doi.org/10.31659/0585-430X-2016-733-734-1-2-55-61
УДК: 544.77:539.89:666.97


AbstractAbout AuthorsReferences
Using the method of dynamic light scattering we investigated the influence of the rotor and pulse impact on a dimensional change of particles in calcium chloride hydrosol used as texturing additives in concrete mixing. Mechanoacoustic processing provides sampling of the disperse phase to the sizes less than 1 nanometer which is maintained for more than 24 hours. The mechanism of reinforcing action of the additive connected with the emergence in cement system the multiple centers of crystallization the number of which increases by 9 decimal orders due to the rotary-pulse impact, is proved by the results of evaluation the parameters of the pore structure of cement stone carried out by the method of low-temperature adsorption and desorption of nitrogen vapors. It has been found that the use of mechanically activated calcium chloride solution for mixing cement pastes decreases defectiveness by reducing the size of the maximum pore diameter in 1.8 times, and by aligning the distribution of specific surface parameters and the volume of pore spaces according to the pore size. Optimizing the pore space enhances the mechanical strength of cement stone by 2.5 times in comparison with a control sample. The greatest effect from mechanoacoustic processing of mixing liquid is obtained in the field of low salt concentrations of about 0.032 mol/l, that is 0.1% of the binder weight.
S.A. KOKSHAROV1 , Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.V. BAZANOV1 , Candidate of Sciences (Engineering);
S.V. FEDOSOV2 , Doctor of Sciences (Engineering), Academician of RAACS, President,
M.V. AKULOVA2 , Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.), Advisor of RAACS,
T.E. SLIZNEVA2 , Candidate of Sciences (Engineering)

1 Institute of Solution Chemistry named after G.A. Krestov of the Russian Academy of Sciences (1, Akademicheskaya Street, Ivanovo, 153045, Russian Federation)
2 Ivanovo State Polytechnical University (20, 8th Marta Street, Ivanovo, 153037, Russian Federation)

1. Chernyshev E.M., Potamoshneva N.D., Artamonova O.V. Concepts and substantiations of nanomodification technology of building composites structures. Part 4 .Sol-gel technology of nano-, micro-disperse crystals of portlandite for contact-condensation compaction of structures of portlandite stone and composites on its base. Stroitel’nye Materialy [Construction Materials]. 2015. No. 11, pp. 65–74. (In Russian).
2. Korolev E.V. Assessment of primary nano-materials concentration for modification of building composites. Stroitel’nye Materialy [Construction Materials]. 2014. No. 6, pp. 31–36. (In Russian).
3. Middendorf B., Singh N.B. Nanoscience and nanotechnology in cementitious materials. Cement International. 2006. No. 4, pр. 80–86.
4. Lesovik V.S., Lopanova E.A. Research process of hydration of cementitious materials by spin labels. Stroitel'nye Materialy [Construction Materials] 2005. No. 5, pp. 44–45. (In Russian).
5. Yudina A.F., Merkushev O.M., Smirnov O.V. Influence of electric treatment of mixing water on the properties of cement stone. Journal of Applied Chemistry. 1986. Vol. 59. No. 10, pp. 2730–2732. (In Russian).
6. Erofeyev V.T., Mitino E.A., Matviyevsky A.A., Osipov A.K., Emel'yanov D.V., Yudin P.V.Composite building materials on the activated mixing water. Stroitel'nye Materialy [Construction Materials]. 2007. No. 11, pp. 56–57. (In Russian).
7. Loganina V.I., Fokin G.A., Vilkova N.G., Karaseva Ya.A. Increasing water activity cement mixing systems acoustic field. Stroitel'nye Materialy [Construction Materials]. 2008. No. 8, pp. 14–15. (In Russian).
8. Yakovlev G.I., Pervushin G.N., Kerene Ya., Polyanskikh I.S., Pudov I.A., Khazeev D.R., Sen'kov S.A. Complex additive based on carbon nanotubes and silica fume for modifying autoclaved aerated gas silicate. Stroitel'nye Materialy [Construction Materials]. 2014. No. 1–2, pp. 3–6. (In Russian).
9. Berne B.J., Pecora R. Dynamic Light Scattering. New York: Wiley. 1976. 376 p.
10. Koksharov S.A., Kornilov N.L., Meteleva O.V. Solvent preparation techniques for assessing nano-dispersed sites using dynamic light scattering. Izvestiya vuzov. Tekhnologiya tekstil'noi promyshlennosti. 2014. No. 1, pp. 136–140. (In Russian).
11. Avakumov E.G. Mekhanicheskie metody aktivatsii khimicheskikh protsessov [Mechanical methods of activation of chemical processes]. Novosibirsk: Science. 1986. 306 p.
12. Patent RF 2345005. Sostav dlya prigotovleniya betona [Ingredients for making concrete]. Fedosov S.V., Akulova M.V., Kasatkina V.I., Padokhin V.A., Strel'nikov A.N. Declared. 26.03.2007. Published 27.01.2009. (InRussian).
13. Aleksenskiy A.E., Shvidchenko A.V., Eidel'man E.D. The applicability of the method of dynamic light scattering to determine the size of nanoparticles in sols. Pis'ma v zhurnal tekhnicheskoi fiziki. 2012. Vol.38. No.23, pp.1–10. (InRussian).
14. Konyakhin S.V., Sharonova L.V., Eidelman E.D Marking suspensions of detonation nanodiamonds optical methods. Pis'ma v zhurnal tekhnicheskoi fiziki. 2013. Vol. 39. No. 5, pp. 33–40. (In Russian).
15. Mayorov P.M. Betonnye smesi: retsepturnyi spravochnik dlya stroitelei i proizvoditelei stroitel'nykh materialov [Concrete mixture: prescription guide for builders and manufacturers of building materials]. Rostov-on-Don. Feniks. 2009. 461 p.
16. Rabinovich V.A., Havin Z.Ya. Kratkii khimicheskii spravochnik [Short chemical reference book]. Leningrad. Khimiya. 1991. 74 p.
17. Butman M.F., Ovchinnikov I.L., Arbuznikov V.V., Agafonov A.V. Synthesis and Properties of Al-pillared montmorillonite natural origin. Izvestiya Vysshikh Uchebnykh Zavedeniy. Khimiya i Khimicheskaya Tekhnologiya. 2012. Vol.55. No.8, pp.73–77. (InRussian).
18. Khozin V.G., Abdrakhmanov P.A., Nizamov R.K. Common concentration pattern of effects of construction materials nanomodification. Stroitel'nye Materialy [Construction Materials]. 2015. No. 2, pp. 25–33. (In Russian).

For citation: 

Print   Email