Abstract：For researching the effects of different mineral fine admixture on the chloride ion permeability coefficient of reactive powder concrete,uses NEL method to compare the RPC-resistance chloride coefficient of four-groups double mixtures of fly ash and silica fume,quartz powder and silica fume,silicon powder and silica fume,the triple adding of fly ash,and quartz powder and silica fume.The results show that(1) chloride ion permeability coefficient decreases with curing age extending and curing temperature increasing,(2) the fly ash has little effect under same curing conditions,(3) quartz powder and silica fume will raise chloride ion permeability coefficient,while the triple adding of fly ash,quartz powder and silica fume decrease the chloride ion permeability coefficient.

Keyword：concrete;mineral fine admixture;chloride;