| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to composition of a concrete mixture for producing high-strength concrete and can be used in industrial-civil, ameliorative construction and when building unique high-load structures - bridges, television relay towers, oil and gas platforms, piers and berths. The concrete mixture contains portland cement, polycarboxylate ether-based superplasticiser, microsilica, average or coarse quartz or feldspar sand, dense rock chips with crushing capacity grade 1200-2000, very fine quartz sand with particle size 0.1-0.63 mm and ground quartz sand or dense rock flour with specific surface area (3-5)103 cm2/g and water, with the following ratio of components in kg/m3 of the concrete mixture: portland cement of a grade not lower than M500 330-480, polycarboxylate ether-based superplasticiser as a percentage of the weight of the cement in terms of dry substance 0.5-1.5, microsilica as a percentage of the weight of the cement 10-15, average or coarse quartz or feldspar sand 300-600, dense rock chips 800-900, ground quartz sand or rock flour 200-350, fine quartz sand with particle size 0.1-0.63 mm 400-600, water 140-180. ^ EFFECT: low specific consumption of cement per unit strength of the concrete. ^ 2 tbl |
