摘   要：研究了不同粉煤灰和矿粉掺量下水泥砂浆试件的力学强度发展过程，并对标养28d后该砂浆在恒温变湿条件下的质量损失、线性收缩率等进行了研究。结果表明，本试验条件下，在RH（100%～80%）湿度变化区间，随着湿度降低各试件质量损失率由大到小为1＞2＞3-3＞3-2＞3-1＞0。各试件的线性收缩率基本呈现快速收缩RH（100%～50％）和相对平衡RH（50%～35％）两个阶段。RH（100%～50％）湿度变化区间随着湿度降低各试件线性收缩率与其质量损失率大小顺序一致。

Abstract: Under the environment of invariable temperature and variation humidity, the compressive strength, mass losing and linear shrinkage of cement mortars mixed with fly ash and slag powder are tested after 28 days standard maintenance. The results indicate that under this experimental condition, in the RH (100%～80%) humidity change interval, the mass loss rate of specimens changed with lower humidity from large to small as 1＞2＞3-3＞3-2＞3-1＞0. Linear shrinkage rate of each specimen basically showed two stages as rapid contraction RH (100%～50%) and relative balance RH (50%～35%). In the RH (100%～50%) humidity change interval, the linear shrinkage rate of the specimen and mass loss rate show the same consistent order with lower humidity.