The hydration degree of fly ash in blended cement-fly ash paste was estimated by selective dissolution.The effect of curing temperature, curing time, water-cement ratio(mw/mc), water of external sources on the hydration degree of fly ash in blended cement-fly ash paste was discussed.The results show that the rate of hydration is improved by the raise of curing temperature.The hydration degree of fly ash does not have a remarkable increase after 1 -2 months at certain curing temperature and mw/mc.The mw/mc determines the maximum degree of hydration of fly ash, higher mw/mc is benefit for the hydration of fly ash.However, the external supply of water cannot supply an extra hydration for the late stage.%采用选择性溶解法测定了水泥-粉煤灰复合浆体中粉煤灰火山灰反应的程度,探讨了养护温度、养护龄期、水灰比、外界水的影响.结果表明:提高养护温度可以加速复合浆体中粉煤灰的火山灰反应;在给定的养护温度、水灰比条件下,复合浆体中粉煤灰的火山灰反应程度在1～2月后不再随龄期的延长而明显增加;水灰比决定了复合浆体中粉煤灰的最大火山灰反应程度,高水灰比有利于粉煤灰的火山灰反应;外界水对粉煤灰后期参与火山灰反应的程度没有明显的影响.
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