This study discusses the drying shrinkage and the carbonation of Ecocement with ground granulated blast-furnace slag, as compared with those of Ordinary portland cement with ground granulated blast-furnace slag. As a result, The drying shrinkage of Ecocement with ground granulated blast-furnace slag had become small, as compared with that of Ordinary portland cement with ground granulated blast-furnace slag, in case of ground granulated blast-furnace slag 50% mixture. The carbonation of Ecocement and Ordinary portland cement with ground granulated blast-furnace slag was increase, but the increase ratio of carbonation when ground granulated blast-furnace slag was mixed was different in Ecocement and the Ordinary portland cement.

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This study discusses compressive strength, penetration of chloride ion and pore size distribution of Ecocemet concrete exposed in marine environments for five years. As a results，Compressive strength is not recognized to lower after exposed for five years．Penetration of chloride ion was admitted to permeate into Ecocement concrete. Total pore volume was admitted to decrease passing in the age , but the pore volume influencing the penetration of chloride ion was a lot of volumes. Ecocement concrete with blast-furnace slag powder was recognized the long-term strength gain, and Penetration of chloride ion did not permeate into Ecocement concrete with blast-furnace slag powder.

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