Phosphogypsum-lime-fly ash composite cementing material and preparation method thereof

The invention discloses a phosphogypsum-lime-fly ash composite cementing material and a preparation method thereof. The phosphogypsum-lime-fly ash composite cementing material is prepared from the following raw materials in parts by weight: 44-56 parts of phosphogypsum, 4-16 parts of cement, 8-16 parts of quick lime, 24-32 parts of fly ash and 0.8-1.6 parts of a curing agent. The method has the characteristics of simple process, improvement of the comprehensive utilization rate of the phosphogypsum and the fly ash, excellent compression resistance and water resistance, proper setting time, micro-expansibility and the like. 本发明公开了一种磷石膏-二灰系复合胶凝材料及制备方法。按重量份计，是以下述原料制得：磷石膏：44～56份、水泥：4～16份、生石灰：8～16份、粉煤灰：24～32份、固化剂：0.8～1.6份。本发明具有工艺简单、提高磷石膏和粉煤灰综合利用率、抗压及耐水性能优良、具有适宜的凝结时间和微膨胀性等特点。