FIELD: chemistry.
SUBSTANCE: invention relates to construction industry and specifically to techniques of preparing compositions for fine-grained concrete mixtures. The mixture for making fine-grained concrete contains the following in kg/m3 of the mixture: portland cement 300-350; screenings from crushing quartzite sandstone with particle size not greater than 0.63 mm 1100-1300; the said mechanically activated quartzite sandstone screenings with specific surface area not less than 700 m2/kg 90-140; water - the rest.
EFFECT: increased strength of hardened cement paste.
1 ex
| Title | Year | Author | Number |
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| FINE-GRAIN CEMENT | 2011 |
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RU2361834C1 |
