C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/38 (2006.01) C04B 7/52 (2006.01) C04B 20/10 (2006.01) C04B 28/04 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2160917
A method for producing cement useful for preparing pastes, mortars, concretes and other cement-based materials, which method comprises a mechano-chemical treatment of cement. The invention is characterized in that the method comprises a two-stage mechano- treatment of a mixture of cement and at least one component of two components, the first component being an SiO2 containing microfiller and the second component being a polymer in the form of a powdery water-reducing agent, in that in the first stage the cement and said first and/or said second component are intensively mixed in a dry state, in that in the second stage the mixture obtained in said first stage is treated in a milling equipment where the particles in said mixture receive in a quick succession a large number of direct-changed impact impulses and in that said treatment in said second stage is carried out during a sufficiently long period of time in order that a 1-day compressive strength of 20 millimeter side cube cement paste, which has been properly compacted under vibration and hardened at +20 °C in sealed conditions at least equals 60 MPa.
Haggstrom Marwin
Ronin Vladimir P.
Fetherstonhaugh & Co.
Haggstrom Marwin
Ronin Vladimir P.
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