【発明の名称】セメントの製造方法

Japanese Patent JP3272360

B2

PCT No. PCT/SE94/00389 Sec. 371 Date Oct. 30, 1995 Sec. 102(e) Date Oct. 30, 1995 PCT Filed Apr. 29, 1994 PCT Pub. No. WO94/25411 PCT Pub. Date Nov. 10, 1994A method for producing cement useful for preparing pastes, mortars, concretes and other cement-based materials, having a high workability with reduced water content, high strength and density, and a rapid development of strength, which method includes a mechanicochemical treatment of cement. The method includes a two-stage mechanicochemical treatment of a mixture of cement and at least one of two components, the first component being a SiO2-containing microfiller and the second component being a polymer in the form of a powdery water-reducing agent. In the first stage the cement and the first and/or the second component are intensively mixed in a dry state, whereby particles of the first and/or the second component are adsorbed on the cement particles. In the second stage the mixture obtained in the first stage is treated in milling equipment where the particles in the mixture receive in quick succession a large number of direct-changed impact impulses resulting in modification of the surface properties of the cement particles in the form of substantial increase of surface energy and chemical reactivity. The treatment in the second stage is carried out during a sufficiently long period of time in order that a 1-day compressive strength of a 20 millimeter per side cube of cement paste, which has been properly compacted under vibration and hardened at +20 DEG C. in sealed conditions, at least equals 60 MPa.

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Ronin, Bradymir Pea.
Huggstrom, malvyn

JP52417494A

April 08, 2002

April 29, 1994

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Ronin, Bradymir Pea.
Haggstrom, Malvin

B28C5/48; B28C7/04; C04B7/52; B28C5/00; C04B20/10; C04B28/04; C04B40/00; (IPC1-7): B28C7/04; B28C5/00; B28C5/48

Akira Asamura (3 outside)

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