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在活性激发剂的作用下,利用矿渣、磷石膏(PG)和水泥混合制备磷石膏基胶凝材料(PGS),然后研究砂率和粉煤灰掺量对PGS砂浆性能的影响.结果表明:当激发剂掺量为3%时,20℃(湿度大于70%)养护28d的PGS固化体的抗压强度和抗折强度(41.9MPa和7.1MPa)分别较未掺激发剂时提高了89.6%和73.2%,28d软化系数为0.94;PGS固化体28d的总孔隙率(12.21%)较7d的总孔隙率降低了46.8%;当砂率为1∶1时,磷石膏砖的性能最佳,28d的抗压强度和抗折强度分别为56.9MPa和4.8MPa;当粉煤灰掺量为20%时,磷石膏砖的28d抗压强度和抗折强度分别为35.8MPa和3.3MPa,28d吸水率和软化系数分别为2.3%和0.90,质量损失率、抗压强度损失率和抗折强度损失率分别为1.9%、5.5%和4.3%.

参考文献

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