Fiber Foam Concrete of Autoclave Hardening with the Use of Composite Binder

The possibility of using a composite binder and fiber to improve the physical and mechanical characteristics of autoclaved foam concrete is theoretically justified and experimentally confirmed. It is shown that the replacement of Portland cement in the foam concrete with binder composite TMTS-70 can increase its strength by 35%. Modified basalt fiber in the process of autoclaving acts as an active substrate for crystallization of hydration products of clinker minerals, prevents corrosion of fiber components of cement stone, leads to an increase in its adhesion to the matrix of the cemented substance, which together with composite binder TMTS-70 makes it possible to increase the strength class in comparison with the control composition of foam concrete from B1,5 to B2,5. Also, dispersed reinforcement of foam concrete helps to reduce the average pore size in the foam concrete matrix, while maintaining the average density, which improves the thermal insulation characteristics of foam concrete, reducing its thermal conductivity. Thus, multi-criteria optimization is carried out and rational limits of variation of prescription-technological factors for the production of autoclaved foam concrete are established.

A.L. POPOV, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
V.V. STROKOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Belgorod State Technological University named after V.G. Shukhov (46, Kostyukova Street, Belgorod, 308012, Russian Federation)

1. Nelyubova V.V. Improving the efficiency of production of silicate autoclave materials using a nano-dispersed modifier. Stroitel’nye Materialy [Construction Materials]. 2008. No. 9, pp. 89–92. (In Russian).
2. Svatovskaya L.B., Sycheva A.M., Eliseeva N.N. Improving the quality of non-autoclaved foamed concrete with nano-size additives. Nanotekhnologii v stroitel’stve: a scientific online journal. 2011. No. 1, pp. 50–62. (In Russian).
3. Mestnikov AE, Semenov S.S., Fedorov V.I. Production and use of autoclaved foamed concrete in Yakutia. Fundamental’nye issledovaniya. 2015. No. 12–3, pp. 490–494. (In Russian).
4. Volodchenko A.N., Strokova V.V. Improving the efficiency of autoclave hardening silicate cellular materials. Vestnik Severo-Vostochnogo federal’nogo universiteta im. M.K. Ammosova. 2017. No. 2 (58), pp. 60–69. (In Russian).
5. Kaftaeva M.V., Nikitin P.N. On the choice of sand for autoclaved cellular concrete in the Republic of Bashkortostan. Tekhnologii bettonov. 2012. No. 1–2 (66–67), pp. 12–14. (In Russian).
6. Strokova V.V., Cherevatova A.V., Nelyubova V.V. Silicate autoclave materials based on highly concentrated binding cement. Stroitel’nye Materialy [Construction Materials]. 2007. No. 10, pp. 10–16. (In Russian).
7. Popov A.L., Strokova V.V., Nelyubova V.V. Features of composite binder on quartz-feldspath sand. Stroitel’stvo i tekhnogennaya bezopasnost’. 2018. No. 12 (64), pp. 63–70. (In Russian).
8. Popov A.L., Nelyubova V.V. Features of the design of autoclaved materials with mineral fibers. Modern problems of construction and life support: safety, quality, energy and resource saving: collection of articles of V All-Russian scientific-practical conference.Yakutsk. March 29, 2018, pp. 155–158. (In Russian).
9. Klyuev S.V., Klyuev A.V., Lesovik R.V. Optimal design of high-quality fiber-reinforced concrete. Bulletin of BSTU named after V.G. Shukhov. 2015. No. 6, pp. 119–121. (In Russian).
10. Aloyan R.M., Ovchinnikov A.A., Akimov A.V. Investigation of the influence of the silica modifier on the mineralogical composition and strength properties of gasconcrete. Nauchnoe obozrenie. 2016. No. 2, pp. 6–13. (In Russian).
11. Ovchinnikov A.A., Akimov A.V., Khozin R.R. Porometric features of gas silicate and their influence on the properties of cellular concrete.Informatsionnaya sreda vuza. 2016. No. 1 (23), pp. 389–394. (In Russian).
12. Babaev V.B., Strokova V.V., Nelyubova V.V., Savgir N.L. On the alkali resistance of basalt fiber in the cement system. Bulletin of BSTU named after V.G. Shukhov. 2013. No. 2, pp. 63–66. (In Russian).
13. Babaev V.B., Strokova V.V., Nelyubova V.V. Basalt fiber as a component for micro-reinforcement of cement composites. Bulletin of BSTU named after V.G. Shukhov. 2012. No. 4, pp. 58–61. (In Russian).