Improvement of Efficiency of No-Fines Haydite Concrete with Nano-Disperse Additives

Physical-mechanical properties and structure of no-fines (no-sand) haydite concrete (NHC) with the use of haydite gravel modified by nano-disperse additive-suspensions obtained as a result of the ultra-sound dispersion of meta-kaolin in water media of organic stabilizer: the superplasticizer C-3 and polyvinyl alcohol have been studied. It is established that the saturation of haydite gravel with developed additives before mixing with Portland cement leads to increase (by 55–75%) in the compressive strength of no-fines haydite concrete. Increasing the strength of NHC is due to the interaction of metakaolin particles with Portlandite with formation, on the haydite surface and in the surface layer of haydite granules, of additional quantity of crystal new-formations identical to hydrosilicate and calcium hydro-aluminate, as well as ettringite facilitating compaction and strengthening of a contact zone of the cement matrix with a filler.

A.A. PYKIN, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
S.V. VASYUNINA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.A. KALUGIN, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.A. SPODENEYKO, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Yu.A. AVER’YANENKO, Master student (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.N. ALEKSANDROVA, 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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