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In this paper the hydration behavior,the development of strength,the pore structure and the penetration of chloride ions of a newly high performance mortar was studied and the properties of mechanic was tested,it is shown that the high performance mortar has excellent properties,such as very high strength,good118density and resistance to chloride ion diffusion because of the very low porosity in cement stone,the use of the high performance mortar in different engineering was discussed.