CONCRETE MIX AND METHOD OF CONCRETE ITEM MANUFACTURE FROM CONCRETE MIX

摘要

FIELD: construction.;SUBSTANCE: inventions may be used for manufacturing concrete items intended for floor elements assembling in buildings and structures, for assembling sidewalks, pedestrian and lawn & garden paths, pedestrian squares and access platforms of public transport and particularly, for producing paving slabs and edge stones, fencing and outer lining, decorative items. The concrete mix includes, wt %: Portland cement 24.0-29.0, mineral filler - mine rock milling wastes - gabbro-diorite or gabbro-diabase, or quartzite from 0.01 to 10.0 mm fractions 40.3-49.8, sand 20.5-30.0, superplasticising agent 0.35-0.45, water 0.17-0.25. Method of concrete item manufacture from the above described concrete mix includes mixing the above Portland cement, mineral filler and sand. After that water is added with previously dissolved superplasticising agent until concrete balls are generated. The above mentioned concrete balls are subject to further horizontal vibration in plastic box until they are completely spread. The spread concrete balls are covered with polyethylene film to preserve moisture until they are completely set. Finally, the prepared solidified mixture is unloaded. The inventions are developed in the dependent points.;EFFECT: improved quality of concrete mix due to reduced water consumption, increased freezing resistance, increased strength characteristics, extended lifetime of concrete items and simplified technology.;4 cl, 4 ex, 1 tbl