不同减水剂对β型磷建筑石膏性能的影响

Different Water Reducing Agents on the Properties ofβ Type Building Phosphogypsum

研究了聚羧酸系减水剂和磺化三聚氰胺减水剂在不同掺量的情况下对β型磷建筑石膏的流动性,减水率,凝结时间,以及绝干抗压强度的影响规律。同时利用软件对最佳减水剂(聚羧酸系)不同掺量的绝干抗压强进行非线性拟合,并将拟合结果和实验结果进行对比。结果表明,聚羧酸系减水剂对β型磷建筑石膏的流动性,凝结时间,以及绝干抗压强度有明显的改善,且减水效果较好;磺化三聚氰胺对β型磷建筑石膏的性能总体上没有影响。通过拟合和实验结果得出,掺量为0.48%聚羧酸系减水剂更适用于β型磷建筑石膏。

The effects of polycarboxylate superplasticizer and sulfonated melamine superplasticizer on the fluidity,water reducing rate,setting time and dry compression strength of β type building phosphogypsum were studied. At the same time,the nonlinear fitting of the best dry reducing strength of the best water reducing agent（ polycarboxylic acid） was performed by software,the fitting results and experimental results were compared. The results show that polycarboxylic acid water reducing agent has obvious improvement on fluidity,setting time and dry compression strength of β type building phosphogypsum,and the water reducing effect is better; especially in setting time. Sulfonated melamine has a little influence on the performance of β type building gypsum. By fitting and experimental results,the dosage of0. 48% polycarboxylate superplasticizer is more suitable for the β type building phosphogypsum.