FIELD: construction.
SUBSTANCE: raw mixture for production of concrete contains, wt %: Portland cement 18-28; fine aggregate 29.9-38.5; plasticizing agent 0.1-1.5; water 12-26; used calculators crushed and sieved through the mesh No. 5 with previously extracted from them storage batteries 16-30.
EFFECT: safe disposal of the used calculators, while maintaining the strength characteristics of concrete.
1 tbl
| Title | Year | Author | Number |
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