A New Type of the Modifier of Concrete Structure is an Additive on the Basis of Bio-Silicified Nano-Tubes

Results of the study of a new type of the modifier of concrete structure, a nano-disperse additive on the basis of bio-silicified nano-tubes from cyanobacteria of Leptolyngbya sp. 0511, Leptolyngbya laminosa 0412, Leptolyngbya sp. 0612 of the Baikal Rift Zone, are presented. Various types of stabilizers of the additive have been studied. It is shown that the dependence of sizes of bio-silicated nanotubes particles and the stability of dispersed phases of suspensions in water medium of the superplasticizer C-3 and polyvinyl alcohol on the duration of ultrasound dispersion has an extreme character. It is established that the maximum effect of the use of the nano-dispersed additive on the basis of bio-silicated nanotubes and C-3 is achieved when the additive content is 0.3–0.5% of the cement mass. At that, the concrete compressive strength increases after 3 days of hardening by 1.7–2.5 times, after 28 days of hardening – by 1.6–2 times, flexural strength – by 2–3.6 times, water absorption reduces by 2.3–4 times.

N.P. LUKUTTSOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.G. USTINOV, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
I.Yu. GREBENCHENKO, Master student (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Bryansk State Engineering-Technological University (3, Stanke Dimitrova Avenue, Bryansk, 241037, Russian Federation)

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