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    • 6. 发明专利
    • Cement admixture and cement composition for mass concrete
    • 水泥混凝土水泥组合物和水泥组合物
    • JP2009263164A
    • 2009-11-12
    • JP2008114817
    • 2008-04-25
    • Denki Kagaku Kogyo Kk電気化学工業株式会社
    • MORIOKA MINORU
    • C04B24/00C04B22/06C04B22/08C04B22/14C04B28/02C04B103/60
    • C04B40/0039C04B20/1025C04B22/008C04B2111/346C04B14/043C04B14/14C04B14/363C04B22/064C04B28/00C04B40/0641
    • PROBLEM TO BE SOLVED: To provide a cement admixture and cement composition for a mass concrete which is effective for suppressing a temperature crack of the mass concrete, which has a good storage stability without causing a setting retardation, moreover wherein an addition amount is reduced.
      SOLUTION: In the cement admixture for the mass concrete, an expanding material containing free lime and one or more kinds of hydraulic compounds selected from among hauyne, calcium silicate, calcium ferrite and calcium aluminoferrite, and the expanding material containing the free lime and anhydrous gypsum, further the expanding material containing the free lime, the hydraulic compounds and the anhydrous gypsum are used as an included substance, and the expanding material is capsulated with a capsule membrane agent. In the cement admixture for the massive concrete, the capsule membrane agent is a wax, a hardened oil or a paraffine. The cement composition contains the cement and the cement admixture for the mass concrete.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种有效抑制大型混凝土的温度裂纹的水泥混合物和水泥组合物,该混凝土具有良好的储存稳定性而不引起凝固阻力,此外,其中添加量 降低了。 解决方案:在大体积混凝土的水泥混合物中,含有游离石灰的膨胀材料和选自胡须,硅酸钙,铁酸钙和铝铁氧体的一种或多种水硬化合物,以及含游离石灰的膨胀材料 无水石膏,还含有游离石灰的膨胀材料,水硬性化合物和无水石膏作为包含物质,膨胀材料用胶囊膜剂包封。 在大块混凝土的水泥混合物中,胶囊膜剂是蜡,硬化油或石蜡。 水泥组合物含有水泥和大体积混凝土的水泥混合物。 版权所有(C)2010,JPO&INPIT