SELF-LEVELLING CONCRETE

摘要

The invention relates to uniformed concrete comprising, in percentages by weight, (d) 87% to 98% of particles comprising more than 90 wt.-% alumina, (c) 1% to 7% silica fume particles, (f) 1% to 8% particles of a hydraulic cement, the fraction of said particles having a size less than 40 μm being distributed as follows, in percentage by weight in relation to the weight of the unformed concrete:
fraction <0.5 μm: ≧4%,fraction <2 μm: ≧5%,fraction <10 μm: ≧19%,fraction <40 μm: 34%-52%,fraction between 2 μm and 40 μm: 26.5%-34%,

the concentration of Zro2, in percentage by weight on the basis of the uniformed concrete, being less than 2%, and the concentration of organic fibres, in percentage by weight on the basis of the uniformed concrete, being less than or equal to 0.03%.

主权项

1. An unshaped concrete comprising, as percentages by weight,
(a) 87% to 98% of particles comprising more than 90% by weight of alumina, (b) 1% to 7% of particles of silica fume, (c) 1% to 8% of particles of a hydraulic cement,the fraction of said particles having a size of less than 40 μm being distributed, as percentages by weight with respect to the weight of the unshaped concrete, in the following way:
fraction <0.5 μm: ≧4%,fraction <2 μm: ≧5%,fraction <10 μm: ≧19%,fraction <40 μm: 34%-52%,provided that the percentage by weight, with respect to the weight of unshaped concrete, of the fraction of between 2 μm and 40 μm is between 26.5% and 34%, the content of ZrO2, as percentage by weight on the basis of the unshaped concrete, being less than 2% and the content of organic fibers, as percentage by weight on the basis of the unshaped concrete, being less than or equal to 0.03%.