| Title |
The Study on Compressive Strength Properties of Concrete Using the Air-Cooled Blast Furnace Slag High Volume Powder |
| Keywords |
Air-Cooled Blast-Furnace Slag High Volume Powder ; Fineness ; Slump ; Compressive Strength ; Accelerator |
| Abstract |
Accordingly, we made slow cooling ground granulated slag powder of which fineness is 7,000, 10,000, 20,000㎠/g by using grinder and examined properties of concrete using that in this study. We carried out slump test, air contents test and compressive strength test to examine properties of concrete according to fineness of slow cooling ground granulated blast- furnace slag, substitute ratio, additive quantity and additive way of calcium hydroxide. The results are as follows (1) Slump and air contents of concrete using slow cooling ground granulated blast-furnace slag varied with fineness and substitute ratio of it but were similar to plain concrete. (2) Compressive strength increased according to rising of fineness of slow cooling ground granulated blast-furnace slag and declined with rising of substitute ratio of it. We judged that fineness of slow cooling ground granulated blast-furnace slag has to be more than 20,000㎠/g to use it as concrete admixture through comparing compressive strength of plain concrete with it of all water curing. (3) Compressive strength of concrete of slow cooling blast-furnace slag ground granulated was improved according to adding accelerator. In case of way adding powder at 4%, 6% and diluting with water at 6%, 8% was excellent. |