高炉スラグ細骨材の固結とその抑制技術

抄録

This study deals with the caking of granulated blast furnace slag sand and its suppressive technique. The above mechanism is also discussed. The caking rate was steeply increased with temperature during storing. The caking occurred by the reason that the hydration product, which is presumably noncrystallin C-S-H, filled the space among the slag grains. By adding sodium gluconate and mixing natural sand, respectively, the caking was depressed chemically and physically. However, when a crushed limestone sand was mixed, the caking was promoted because of its chemical reaction with slag. The effect of granulated blast furnace slag sand containing sodium gluconate on the concrete properties was actually negligible.