Influence of Blast-Furnace Slag Powder on Long Age Strength of Concrete With Ecocement

Abstract

A report has been compiled on the use of blast-furnace slag powder with Ecocement to improve the long-term strength gain. This study discusses the long-term strength gain of Ecocement with blast-furnace slag powder that it examined the influence of the water cementitious material ratio, mixing ratio of the blast furnace slag powder and the curing condition, in order to obtain basic data to clarify the mechanism on the long-term strength gain of Ecocement with blast-furnace slag powder. As a result, it was able to be confirmed that the long-term strength gain of Ecocement with blast-furnace slag powder was improved regardless of the water cementitious material ratio, mixing ratio of the blast furnace slag powder and the curing condition. Results of pore size distribution, Ecocement with blast-furnace slag powder was acknowledged densification of pore volume. This study had a high correlation between a decrease in the pore volume of 0.01µm or more and compressive strength, it was clarified that the long-term strength gain had improved because of a decrease in these pore volume�