废渣黄石膏配制胶结材和混凝土的研究

Research on Preparation of Binding Material and Concrete with Waste Sludge Yellow Gypsum

以废渣黄石膏、水泥、石子、砂子、外加剂为原料配制胶结材和混凝土，并对其性能进行了研究。结果表明：加入10％黄石膏的水泥胶砂抗压抗折强度均满足P．042．5水泥的强度指标要求，其凝结时间及安全性合格；采用配比为黄石膏30％、水泥70％、CJ-1高效减水剂1．2％-2．0％可以配制C30混凝土，其抗渗性能达到P12抗渗等级要求。该工艺既可以大量利用废渣黄石膏，又可以解决环境污染问题。

The binding material and concrete are prepared by waste sludge yellow gypsum, cement, stone,sand and admixture. The performances of the binding material are studied in this paper. The experimental results showed that it is feasible to prepare the binding material by using cement, yellow gypsum and superplasticizer after drying and grinding of yellow gypsum. The cement micellae compressive and bending strength of adding yellow gypsum（ 10 percent） can meet the standard requirements of P. 042.5,which means the binding material＇s set time and soundness are qualified. To prepare C30 concrete ,whose impermeability meets the requirements of P12, the yellow gypsum（ 30 percent） ,cement（70 percent）, CJ-1 superplasticizer（ 1.2to 2.0 percent ） are mixed. The research can not only massively use waste sludge yellow gypsum but also solve environmental pollution.