Combining Additives of Various Genesis for Enhancing Modification of Concrete

Number of journal: 1-2-2017
Autors:

Elrefai A.E.M.M.
Pudov I.A.
Yakovlev G.I.
Senkov S.A.
Buryanov A.F.

DOI: https://doi.org/10.31659/0585-430X-2017-745-1-2-26-30
AbstractAbout AuthorsReferences
Combining Additives of Various Genesis for Enhancing Modification of Concrete Currently, the main building material in construction is Portland cement-based heavy concrete. The paper studies the influence of different combinations of various superplasticizers, sil- icon dioxide and dispersion of multi-walled carbon nanotubes on the structure and properties of concrete. Combining the above additives in their optimal concentrations increases the strength after 7 days by 72–95%, after 28 days by 40–85% accordingly. Also, there is a change in the porosity parameters of the modified samples structure. The addition of complex additives is triggered the reduction of total porosity by 21–50%, decrease in the average pore sizes and a relative increase in the content of potentially closed pores. The differential thermal analysis of the cement matrix showed an increase of the total amount of calcium hydroxide due to the increased hydration of Portland cement in the modified concrete. The obtained data showed higher performance of the construction material.
A.E.M.M. ELREFAI1 , Engineer,
I.A. PUDOV1 , Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.I. YAKOVLEV1 , Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.A. SENKOV2 , Candidate of Sciences (Engineering);
A.F. BURYANOV3 , Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.

1 Kalashnikov Izhevsk State University (426069, Izhevsk, Studencheskaya Street, 7, Russian Federation) 
2 Perm National Research Polytechnic University (614990, Perm, Komsomolskiy Avenue, 29, Russian Federation) 
3 National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

1. Kalashnikov V.I., Tarakanov O.V., Moskvin R.N., Moroz M.N., Belyakova E.A., Belyakova V.S., Spirido- nov R.I. Application of aqueous suspensions of natural putstsolanicheskih additives in the production of con- crete. Sistemy. Metody. Technologii. 2013. No. 1 (17), pp. 103–107. (In Russian). 
2. Shishkin A.A. The alkaline reaction powder concretes. Stroitelstvo unikalnih zdanii i soorujenii. 2014. No. 2 (17), pp. 56–65. (In Russian). 
3. Gamaliy E.A. Complex modifiers on the basis of ether polycarboxylates and active mineral additives for heavy concrete. Cand. Diss. (Engineering). Chelyabinsk. 2009. 217 p. (In Russian).
4. Krasinikova N.M., Kashapov R.R., Morozov N.M., Khozin V.G. Structure formation of cement stone with a polyfunctional additive. Stroitel’nye Materialy [Construc- tion Materials]. 2016. No. 5, pp. 66–69. 
5. Leontev S.V., Golubev V.A., Shamanov V.A., Kurza- nov A.D., Yakovlev G.I., Khazeev D.R. Modification of the structure of thermal insulation of autoclaved aerated concrete with dispersion of multi-walled carbon nanotubes. Stroitel’nye Materialy [Construction Materials]. 2016. No. 1–2, pp. 76–83. 
6. Safarov K.B., Stepanova V.F. Regulation of reaction capacity of fillers and increasing sulfate resistance of concretes by combined use of low-calcium fly ash and high-active metakaolin. Stroitel’nye Materialy [Construction Materials]. 2016. No. 5, pp. 70–73. (In Russian). 
7. Sakthieswaran N.A., Suresh M. Study on strength properties for cement mortar added with carbon nanotubes and zeolite. International Journal of Engineering and Computer Science. 2015. Vol. 4 (6), pp. 12402–12406. 
8. Сollepardi M., Collepardi S., Skarp U. Optimization of silica fume, fly ash and amorphous nano-silica in superplasticized high-performance concrete. ACI Materials Journal. 2004, pp. 495–506. 
9. Karpova E.A., Elrefaei A.E.M.M., Skripkiunas D., Keriene Ja., Kichaite A., Yakovlev G.I., Macijauskas M., Pudov I.A., Aliev E.V., Senkov S.A. modification of сement сoncrete by use of сomplex additives based on the polycarboxylate ether, carbon nanotubes and microsilica. Stroitel’nye Materialy [Construction Materials]. 2015. No. 2, pp. 40–47. 
10. Yakovlev G.I., Pervushin G.N., Korzhenko A., Burya- nov A.F., Pudov I.A., Lushnikova A.A. Modification of cement concretes with multilayer carbon nanotubes. Stroitel’nye Materialy [Construction Materials]. 2011. No. 2, pp. 47–51. (In Russian).

For citation: Elrefai A.E.M.M., Pudov I.A., Yakovlev G.I., Senkov S.A., Buryanov A.F. Combining additives of various genesis for enhancing modification of concrete. Stroitel’nye Materialy [Construction materials]. 2017. No. 1–2, pp. 26–30. DOI: https://doi.org/10.31659/0585-430X-2017-745-1-2-26-30. (In Russian).


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