The mix proportion of reactive powder concrete (RPC ) with rice husk ash was investigated through experiment .On the basis of maximum density theory , the primary mix proportion of RPC with rice husk ash was designed .Influences of two kinds of fine aggregate , such as quartz sand and natural sand ,on the property of RPC were investigated .Experiments on RPC with different water binder ratios were done , and a range for water binder ratio was suggested .The rice husk ash was used to replace the silica fume in RPC ,and the influences of the replacement ratio on flowability ,strength and durability were investigated .The results show that there is little influence on flexural strength ,compressive strength and fluidity by taking natural sand as fine aggregate replacing quartz sand .The appropriate water binder ratio of RPC with rice husk ash is 0 .20‐0 .22 .With the increasing of amount of rice husk ash replacing silica fume ,the shrinkage rate reduces and change slowly with ages ,and the chloride‐penetration resistance reduces .It is suggested that the silica fume in RPC can be replaced by rice husk ash partially or completely according to different application requirements.%通过试验研究了掺稻壳灰的活性粉末混凝土（RPC ）的配合比，根据最大密实度理论对掺稻壳灰的RPC进行了基本配合比设计；试验比较了石英砂和天然砂2种细集料对RPC性能的影响；对不同水胶比的RPC进行试验，推荐了适宜水胶比；以稻壳灰替代硅灰，试验研究不同稻壳灰替代率对RPC的流动性、强度及耐久性的影响。结果表明：采用天然砂替代石英砂作为细骨料对RPC抗折强度、抗压强度及流动度影响不大；掺稻壳灰的RPC的适宜水胶比为0．20～0．22；随着稻壳灰替代硅灰掺量的增加，其收缩率降低且随龄期增长变化减缓，同时其抗氯离子渗透性能有所下降；建议根据不同使用性能要求选择稻壳灰部分或完全替代硅灰的RPC。
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