| 摘要 |
The field of the invention is the building industry, and it can be used to produce concrete coble-stones, wall blocks, decoration plates as well as board stones and reinforced products, covering elements etc. Its goal is to improve the quality of concrete and ferroconcrete products. The method offered for production of monoconcrete products is implemented in two stages. In stage one, the moistened concrete mixture is compacted in the mold by means of the common vibration compaction method. In the next stage, the mold is closed and is affected by periodic mutually orthogonal impact impulses and vibrations. As a result, the internal friction of the concrete mass is reduced radically, and, affected by the pressing force, parts of fillers' components are rearranged, and they take the most convenient position with respect to one another, gaps between those get reduced, as well as the consumption of binding agents decreases. The concrete mix pre-compacted in the mold by means of vibration is pressed in closed space by impact and vibratory impulses until the moment when the ratio Vb/Vs is less or equal to 0,75, where Vb is the volume of the mold at the end of pressing, Vs - is the volume of the mold at the beginning of pressing. At this ratio provided that P is greater than 6 MPa the average resistance exponent tends to infinity. When the ratio Vb/Vs is greater than 0,75 jump is not obtained qualitative. This method is tested in pilot production at the constant speed of mold volume variation.
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