Construction material, process for the production thereof and use thereof

摘要

A construction material consists of a set and/or puzzolanically hardened mixture containing 5 to 30% by weight of sulphite-containing flue-gas desulphurisation product from dry and/or quasi-dry processes, 70 to 95% of fly ash, if appropriate additionally up to 15% by weight, based on the mixture, of a hardening agent and, if desired, additionally up to 3% by weight of further additives and auxiliaries. It is preferably used in the form of subsequently ground briquettes, pellets, mechanically compacted blocks, extruded material or cast pasty compositions. It may be used as construction material, in particular as mineral concrete, for base courses of buildings, car parks, cycle tracks, as filling material in civil engineering and earthwork, as filler in dam construction and dyke construction and aggregate for mining mortar and also, with or without aggregate, as mining mortar.