FIELD: chemistry.
SUBSTANCE: group of inventions relates to dry concrete or mortar composition, containing porous granules and to concrete or mortar, manufactured from said composition. Dry concrete or mortar composition, containing particles-cores, to the surfaces of which particle of hydraulic binding substance are fixed, and separate particles of hydraulic binding substance, particles-cores consist of inert or pozzolanic material and together with binding substance attached to them form porous granules, which, in their turn, are fixed to the surface of dry filling agent. Concrete or mortar, manufactured from said dry composition, mixed with water, is described. Invention is developed in dependent items of the invention formula.
EFFECT: increase of strength and fire resistance of concrete, obtained from claimed dry composition.
25 cl, 2 ex
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