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    • 100. 发明申请
    • Ultrahigh-performance, self-compacting concrete, preparation method thereof and use of same
    • 超高性能,自密实混凝土,其制备方法和用途
    • US20070163470A1
    • 2007-07-19
    • US10589138
    • 2005-02-11
    • Sandrine ChanutThierry Thibaux
    • Sandrine ChanutThierry Thibaux
    • C04B14/38C04B7/00C04B24/00C04B14/00
    • C04B28/02C04B2111/00103C04B2111/62C04B2111/802C04B2201/52Y02P40/146Y02W30/94C04B14/06C04B14/28C04B14/303C04B14/48C04B18/146C04B20/0076C04B20/008C04B2103/32C04B2103/50C04B14/386C04B16/0633C04B16/0691
    • The invention relates to an ultra-high-performance, self-compacting light-coloured concrete comprising: a cement; a mixture of calcined bauxite sands of different grain sizes, the finest sand having an average grain size of less than 1 mm and the thickest sand having an average grain size of less than 10 mm; optionally silica fume, whereby 90% of the particles thereof have a size of less than 1 ?m and the average diameter is approximately 0.5 ?m, said silica fume representing at most 15 parts by weight per 100 parts of cement; an antifoaming agent; water-reducing superplasticiser; optionally fibres; and water. The inventive concrete also comprises: ultrafine calcium carbonate particles having a specific surface area that is equal to or greater than 10 m2/g and a form factor (IF) that is equal to or greater than 0.3 and, preferably, equal to or greater than 0.4. The grain size distribution of the cements, sands, ultrafine calcium carbonate particles and silica fume is such that at least three, and at most five, different grain size ranges are present, the ratio between the average diameter of one grain size range and that of the range immediately above is approximately 10. The invention also relates to the method of preparing one such concrete and to the uses thereof.
    • 本发明涉及超高性能,自密实的浅色混凝土,其包括:水泥; 不同粒度的煅烧铝土矿砂的混合物,平均粒度小于1mm的最细砂,平均粒径小于10毫米的最厚砂; 任选的硅灰,其中90%的颗粒具有小于1μm的尺寸,平均直径约为0.5μm,所述硅灰每100份水泥代表最多为15重量份; 消泡剂; 减水超增塑剂; 可选纤维; 和水。 本发明的混凝土还包括:比表面积等于或大于10m 2 / g的超细碳酸钙颗粒和等于或大于0.3的形状因子(IF)和等于或大于0.3的形状因子 ,优选等于或大于0.4。 水泥,砂,超细碳酸钙颗粒和硅灰的粒度分布使得存在至少三个,至多五个不同的晶粒尺寸范围,一个晶粒尺寸范围的平均直径与 上述范围大约为10.本发明还涉及制备这种混凝土及其用途的方法。