| 摘要 |
The invention pertains to a concrete material for a support layer of a permanent way for railroads or streetcars that is realized in a ballastless fashion, as well as the utilization of this material for producing such a support layer. This material should make it possible to effectively reduce the thus far required expenditure of manual labor for installation and compacting work--particularly for banked tracks in curves. This is achieved in that the concrete material has a limestone powder content of 240-280 kg/m3 and an aggregate content of 1500-1700 kg/m3, wherein 35-45% of the aggregate consist of an aggregate with grain sizes on the order of 0 to 2 mm, 25-35% consist of an aggregate with grain sizes on the order of 2 to 8 mm and 25-35% consist of an aggregate with grain sizes on the order of 8 to 16 mm, and wherein a flow agent content is inversely proportional to the geometric cant of the support layer of the permanent way.
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