| 摘要 |
When producing building elements of lightweight concrete a viscous slurry is poured into a mould in order to form a stiff mould body. By means of parting planes this mould body is divided into individual elements of smaller sizes. According to the invention a plurality of zones having different densities and/or natures are formed in the mould body, the individual partin g plane being located within such a zone. Hereby one obtains building elements which include at least two portions having different densities and/or natures. |
