| Authors |
Lim Nam-Gi ; Kim Hyo-Youl |
| Keywords |
high-blaine blast furnace slag powder ; slump ; air content ; compressive strength ; depth of carbonation |
| Abstract |
This study lies in close examine the fluidity property of concrete using granulate high-blaine blast- furnace slag powder which treated granulate blast-furnace slag powder over 7,000㎠/g and early and long-age compressive strength development property, and investigate the trait of carbonation to provide essential information about durability. ??1. There are somewhat differences on concrete slump according to the change of granulate blast- furnace slag powder's fineness and replacing rate. Slump 14±2.5㎝ was satisfied in all conditions. 2. Air content according to the granulate blast-furnace slag powder and replacing rate satisfied the range of air content in all conditions. Air content were decreased a little by increasing fineness. 3. Improvement effect of early-age compressive strength of concrete was shown by increasing granulate blast-furnace slag powder' fineness. In particular, outstanding improvement effect was shown over 10,000㎠/g of fineness and it was revealed that the utilization as concrete admixture was magnificent. 4. As a result of using slag make into high-blaine powder, carbonation depth of concrete was decreased by increasing fineness and replacing rate. |