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Expansion of use of mixed cement is effective as a measure to reduce CO2 emissions in the cement industry. Since ground granulated blast furnace slag can feely set the substitution rate according to the use and conditions of concrete, it can be used wider than ground granulated blast furnace slag cement and is expected. Since the initial strength development of concrete using blast furnace slag is slow, it is effective to utilize ground granulated blast furnace slag with a large specific surface area as an improvement method. In this study, we investigated the long term strength of concrete by changing the combination of the specific surface area and the substitution rate, for a wide range of ground granulated blast furnace slag with a specific surface area of 4000 to 30000 (cm 2 /g). As a result, from the conditions such as the specific surface area and the substitution rate of the ground granulated blast furnace slag, the effect of strength development of concrete using ground granulated blast furnace slag was quantitatively clarified.

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61コンクリート工学論文集 第 28 巻，61-69，2017 年

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