| 摘要 |
The invention is related to nanocement production methods by modifying portland cement, as well as to nanocement compositions. The nanocement production method involves a mechanochemical activation of dispersed grains of portland cement in the presence of polymeric modifier, with the sodium naphthalenesulfonate content of at least 60 wt %, mineral siliceous additive containing at least 30 wt % SiO 2 and gypsum, to form continuous nanoshells - capsules of 20-100 nm in thickness on portland cement grains made of sodium naphthalenesulfonate structured by calcium cations; in this case, the mechanochemical activation of portland cement is combined with grinding the material to a specific surface area of 300-900 m 2 /kg and is carried out in a ball mill with the following ratio of initial components, wt %: This method makes it possible to improve the cement construction and technical properties to classes 72.5-82.5, to reduce the cement prime cost, to reduce drastically the specific fuel consumption, and emissions of NO x , SO 2 and CO 2 . |
