| 摘要 |
<p>The invention relates to a process for producing a building material and binder having increased water resistance based on natural and/or synthetic anhydrite having a high milled fineness, an activator, a very finely milled filler and additives giving the water resistance, which binder or building material has a fineness by the Blaine method of at least 2500 cm<2>/g, which is characterised in that the additive used is commercial quicklime (burnt lime) and/or slaked lime. The additive is preferably mixed in. Preferably, a high-alumina cement in an amount of at least 2% by weight, based on the total weight, is preferably added as further additional additive. The synthetic anhydrite used is preferably one which is obtained as byproduct in the chemical industry. Furthermore, the finely milled filler can be a marl having an alumina content of at least 4% by weight. The further filler material used can be fly ash and/or very finely milled granulated blast furnace slag.</p> |
