| 摘要 |
FIELD: construction. ^ SUBSTANCE: invention relates to the industry of construction materials. The artificial rock contains the following in wt %: cement 30-32, calcium carbonate based sand 38.5-43.3, sludge from filtration fields of water treatment stations 1-10, superplasticiser C-3 1.5-2.0, water 20-22. ^ EFFECT: high strength. ^ 1 tbl |
