FIELD: chemistry.
SUBSTANCE: invention relates to production of concrete castings which can be used to line inner walls of vessels and smelting furnaces for producing liquid metal, glass etc. The castings are obtained from casting compositions with low water content, not more than 2.8 wt %, wherein refractory filler with narrow particle fractions with a given population and given intervals in particle size distribution is used: refractory granules of a larger fraction are separated from granules of a smaller fraction by an interval in which the ratio of the diameter of the granules of the larger fraction to that of the smaller fraction is equal to at least the square root of two. The composition can contain at least four granule fractions.
EFFECT: obtaining castings with a high modulus of rupture, high cold cracking strength and low porosity.
29 cl, 5 tbl, 7 dwg
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