进行掺固硫灰活性粉末混凝土(RPC)配合比的正交设计试验,研究了养护制度对掺固硫灰RPC强度和收缩性能的影响以及固硫灰对RPC收缩性能的影响.结果表明:应用固硫灰、硅灰、高效减水剂、中级石英砂、P·O42.5R及湿热养护工艺,可配制出抗折强度26 MPa、抗压强度140 MPa的活性粉末混凝土;湿热养护可促进掺固硫灰RPC的水化,形成较致密的结构,其早期强度比标准养护高30MPa左右,但高温使早期形成的AFt转变成AFm,故后期的强度有所倒缩；与标准养护相比,湿热养护促进掺固硫灰RPC的早期收缩,降低了其后期干缩,但总体收缩率仍大于标准养护;固硫灰的膨胀性特性可有效改善RPC自收缩大的缺点.
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