Properties of Natural Zeolite for Producing High-Strength Fine Concrete

Results of the study of natural zeolite from Egypt are presented. To establish comparative dependences of the rates of natural zeolite from the Sinai Peninsula of Egypt with mineral additives of the Russian market of building materials, natural zeolite-containing marl of the Tatarsko-Shatrashanskoe Deposit, silica fume, metakaolin were used. It is established that the water-aggregate ratio of powders studied increases in the following sequence: zeolite from Egypt, ground sand, silica fume, zeolite-containing marl, and metakaolin. The limit shear stress of water-mineral pastes is calculated according to reotechnological indexes, their plasticizing sensitivity to liquefiers of different chemical nature is determined. The pozzolanic activity of natural zeolite concerning CaO absorption which is equal to 510 g/l is researched, the change in pH of the medium of hydrating zeolite-cement suspensions is determined, the value of which declined to 12.7. Fine cement concretes with strength from 75 to 86 MPa with a content of the natural zeolite from Egypt – 5 and 10% have been obtained.

H.A. QAIS, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
N.N. MOROZOVA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Kazan State University of Architecture and Engineering (1, Zelenaya Street, Kazan, 420043, Russian Federation)

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