| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to production of nanocement. Proposed process comprises grinding by crushing rolls of Portland cement clinker, mineral siliceous additive containing SiOin amount of at least 30 wt % and gypsum stone to the following grain size, wt %: 15-25 mm - 10-15; 5-7 mm - 15-20; powder - 60-75. Obtained mix is homogenized in the mixer by forced mixing. Then, it is subjected to mechanochemical activation in three-chamber ball mill to specific surface of 300-900 m/kg. Polymer modifying agent is added to said ball mill which contains at least 60 wt % of sodium naphthalene sulphonate to form on Portland cement grains the solid nanocapsules of 20-100 nm in depth composed by CHSOCaNa at the following ratio of initial components, wt %: Portland cement clinker - 30.0-90.0, gypsum stone - 0.3-6.0, modifying agent - 0.5-2.0, said mineral siliceous additive making the rest. Invention relates also to nanocement thus produced.EFFECT: higher properties of cement to class of 72,5-82,5, lower costs, fuel saving, decreased emissions of NO, SOand CO.2 cl, 7 dwg, 11 tbl |
