| 摘要 |
<p>The invention relates to the use of a hydraulically setting multi-component mixture as construction material and backfill material in mining practice, which material consists of a alpha -gypsum, bituminous coal fly ash, a coarse-grained mineral aggregate and a lime donor and to which a quantity of water required for setting has been added in a manner known per se. In this case, the proportions of the alpha -gypsum and of the fly ash each amount to 25-55% by weight, that of the coarse-grained mineral aggregate amounts to 10-40% by weight and that of the lime donor amounts to 1-6% by weight, the proportion of the lime donor being between 3 and 12% by weight relative to the fly ash; the upper grain size limits are 1 mm for the alpha -gypsum, 25 mm for the coarse-grained mineral aggregate and 0.5 mm for the lime donor, whereas the fly ash is used as received. <IMAGE></p> |
