| 摘要 |
Moulded objects having a coherent matrix comprising homogeneously arranged inorganic solid particles A of a size ranging from approx. 50 angstrom to 0.5 μ such as silica dust particles, and densely packed solid particles B having a size in the order of magnitude 0.5-100 μ and being at least one order of magnitude larger than the respective particles A, for example Portland cement particles, in which the particles A are homogeneously distributed, especially densely packed, in the space between the particles B, are made from an easy-flowing composite material containing a very small quantity of liquid and an extremely high quantity of a dispersant, for example a concrete superplastifier. Specimens having Portland cement-silica dust-based matrices with dense packing of the silica dust have higher compressive strengths than previously described in the literature and reinforcements such as fibres or steel rods are fixed to very high measure in the dense Portland cement-silica dust matrix owing to the density of the matrix in contact with the reinforcement, as shown in Fig. 5, which figure shows a plastics fibre incorporated in the dense matrix. The composite material for the manufacture of the moulded object comprises dispersant in sufficiently high quantity to obtain viscous to plastic consistency in the composite material with a small liquid volume necessary to fill the space between the particles A and B. The forming of the composite material can be carried out in a low-tension region and without any exchange of liquid with the environment. <IMAGE>
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