2023 Volume 77 Issue 1 Pages 197-205
Toward the carbon-neutral society, the cement industry is trying to increase the use of mineral admixtures. On the other hand, the amount of blast furnace slag, a typical mineral admixture, is expected to decrease in the future. Therefore, we investigated the properties of mortar and its influencing factors of blended cement using limestone powder as a partial replacement of blast furnace slag cement. The results showed that the mortar flow was improved, setting time was shortened, and short-term compressive strength was improved due to addition of limestone powder, and the 28-day compressive strength and water penetration rate coefficient were similar values when the replacement ratio of limestone powder was up to 10％. The results also suggest that the influencing factor for compressive strength is porosity, whereas the influencing factor for the water penetration rate coefficient is the complexity of the pore structure.
