Effectiveness Evaluation Criteria of Using Fine Powders of Secondary Concrete as a Component of Composite Binder

Abstract:

The paper considers the possibility of using energy criteria (surface activity, free surface energy) to quantify the efficiency of a highly dispersed system consisting of fine particles of secondary concrete as a component of composite binder of the hydration type of hardening. Using the G.A. Zisman method, the value of the critical surface tension was determined for secondary concrete fractions with different degrees of dispersion, which gives an idea of the free surface energy of a surface area unit. Based on the experimental data for determining the specific surface area and critical surface tension, the free surface energy and surface activity of the studied concrete powder were calculated, which can serve as criteria for quantitative energy characteristics of raw materials for the production of composite binders. Calorimetric studies related to measurements of the thermal effects of the hydration reaction of highly dispersed samples of secondary concrete have shown that this process is exothermic, the enthalpy of hydration of which is comparable to a similar parameter for cement. It was experimentally shown that fine powders of secondary concrete are effective as components of a composite binder, but they need to be pre-activated to optimal parameters, one of which is surface activity. In addition, the symbasis of changes in surface activity, the specific heat of the hydration reaction of highly dispersed concrete fractions and the compressive strength of fine-grained concrete samples made by using a composite binder containing a highly dispersed fraction of secondary concrete was established.

References

[1] D.D. Netsvet, V.V. Nelyubova and V.V. Strokova, Composite binder with mineral additives for non-autoclaved foam concrete, Bulletin of the BSTU named after V.G. Shukhov. 4 (2019) 122-131.

DOI: 10.34031/article_5cb1e65d077f65.54773394

[2] V.V. Nelyubova, V.V. Strokova, N.V. Pavlenko and I.V. Zhernovsky, Construction composites using nanostructured binder based on raw materials of various genetic types, Construction materials. 2 (2013) 11-15.

[3] R.V. Lesovik, M.S. Ageeva, G.A. Lesovik, G.G. Bogusevich, S.M. Shapovalov and D.M. Sopin, Increasing the efficiency of large-pored expanded clay concrete by using composite binders from technogenic raw materials of various nature, Bulletin of BSTU named after V.G. Shukhov. 11 (2016) 58-62.

DOI: 10.12737/22545

[4] M.Yu. Elistratkin, A.V. Minakova, A.N. Jamil, V.V. Kukovitsky, Issa Jamal and Issa Eleyan, Composite binders for finishing compositions, Construction Materials and Products. 1(2) (2018) 37-44.

DOI: 10.34031/2618-7183-2018-1-2-37-44

[5] V.S. Lesovik, M.V. Absimetov, M.Yu. Elistratkin, M.A. Pospelova and S.V. Shatalova, For the study of peculiarities of structure formation of composite binders for non-autoclaved aerated concrete, Construction Materials and Products. 2 (3) (2019) 41-47.

DOI: 10.34031/2618-7183-2019-2-3-41-47

[6] L.A. Veshnyakova, A.M. Ayzenstadt and M.A. Frolova, Evaluation of surface activity of highly dispersed raw materials for composite building materials, Physics and chemistry of materials processing. 2 (2015) 68-72.

[7] V.S. Lesovik, M.A. Frolova and A.M. Ayzenstadt, Surface activity of rocks, Construction materials.11 (2013) 71-74.

[8] L.A. Veshnyakova, T.A. Drozdyuk, A.M. Ayzenstadt, M.A. Frolova and A.S. Tutygin, Surface activity of silicic rocks, Materials Science. 5 (2016) 45-48.

[9] R.Z. Rakhimov, N.R. Rakhimova and G.A. Fatykhov, On the complex use of slags and concrete scrap in the production of slag-alkali binders, Proceedings of the Kazan State University of Architecture and Construction. 2(16) (2011) 218-223.

[10] I.I. Fayzrakhmanov, M.I. Khaliullin, A.N. Leklu and O. Amiri, Use of fine-dispersed screenings of concrete scrap in cement compositions for obtaining building solutions, Proceedings of the Kazan State University of Architecture and Construction. 4 (2016) 395-401.

[11] B.V. Gusev and V.A. Zagursky, Secondary use of concrete, Stroyizdat, (1988).

[12] I.M. Krasny, On the mechanism of increasing the strength of concrete when introducing a micro-filler, Concrete and reinforced concrete. 5 (1987) 10-11.

[13] Yu.M. Bazhenov, Multicomponent fine-grained concrete, Construction materials, equipment, technologies of the XXI century. 10 (2001) 24-26.

[14] V.I. Roldugin, Physical chemistry of surfaces, textbook, monograph, Intelligence, Dolgoprudny, (2008).

[15] E.V. Korolev, V.A. Smirnov, and A.I. Albakasov, Some aspects of designing multi-component composite materials, Nanotechnologies in construction: an online scientific journal. 6 (2011) 32-43.

[16] V.V. Strokova, A.V. Cherevatova, I.V. Zhernovsky and E.V. Voytovich, Features of phase formation in composite nanostructured gypsum binder, Construction materials. 7 (2012) 9–12.

[17] A.M. Glezer, Amorphous and nanocrystalline structures: similarity, differences, mutual transitions, J. Rus. chem. Soc. named after D.I. Mendeleev. XLVI(5) (2002) 57-63.

[18] V.V. Zuev, L.N. Potselueva, and Yu.D. Goncharov, Crystal energy as a basis for evaluating the magnesian properties of solid materials (including magnesian cements), Saint Petersburg, (2006).

[19] I.R. Abramovskaya, A.M. Ayzenstadt, L.A. Veshnyakova, M.A. Frolova, V.S. Lesovik and S.A. Kazlitin, Calculation of the energy intensity of rocks as raw materials for the production of building materials, Industrial and civil construction. 10 (2012) 23-25.

[20] M.A. Frolova, A.S. Tutygin, A.M. Ayzenstadt, V.S. Lesovik, T.A. Makhova and T.A. Pospelova, Criteria for evaluating energy properties of a surface, Nanosystems: physics, chemistry, mathematics. 2(4) (2011) 1-6.

[21] A.A. Serdyukova and I.Sh. Rakhimbaev, Influence of water-cement ratio on the kinetics of heat release of cements, Cement and its application. 3 (2012) 123-126.

[22] V.V. Babitsky, Forecasting the kinetics of concrete hardening during thermos holding of structures, Building materials, technology and equipment of the XXI century. 4 (2005) 66-67.