使用脱硫石膏和粉煤灰生产石膏基粉刷材料是燃煤电厂两大固体废弃物的有效利用途径.研究了不同掺量的粉煤灰、缓凝剂和保水剂对石膏基粉刷材料的凝结时间、保水率及力学性能的影响.结果表明,脱硫石青与粉谋灰的最佳质量比为3:2,SC缓凝剂效果最好,适宜掺量0.2%～0.3%,保水剂的掺量应不低于0.2%时,粉刷石膏的成本较低,性能满足标准要求.%It was an effective way to make use of flue gas desulfuration gypsum and fly ash of two solid wastes from coal fired power plant in producing desulfuration plaster gypsum. In this paper, the setting time, water retention rate and mechanical properties of desulfuration plaster gypsum were achieved by different content of fly ash, retarder and water retention agent. The experimental results showed that the low price and good performance of desulfuration plaster gypsum could be produced under the following conditions: the best ratio of flue gas desulfuration gypsum and fly ash was 3: 2, the optimal retarder was SC gypsum retarder and its proportion was 0.2％～0.3％ and the content of water retention agent should be not less than 0.2％.
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