| 摘要 |
<p>PURPOSE: A blast furnace slag micro powder composition with improved activity is provided to remarkably improve early strength and activity of concrete by adding desulfurization slag to the blast furnace slag in a specific ratio. CONSTITUTION: A blast furnace slag micro powder composition with improved activity comprises 70-99.9 parts by weight of ground granulated blast-furnace slag and 0.1-30 parts by weight of desulphurizer slag. The ground granulated blast-furnace slag has fineness of 2,700-10,000cm^2/g. The blast furnace slag comprises 20-40 weight% of SiO2, 0-2 weight% of Al2O3, 5-17 weight% of Fe2O3, 20-40 weight% of CaO, 5-17 weight% of MgO, 0-5 weight% of MnO, 0-2 weight% of SO3. The desulphurizer slag comprises 40-70 weight% of CaO, 10-30 weight% of SiO2, 5-20 weight% of Al2O3, 1-15 weight% of MgO, 0.5-30 weight% of T-Fe, and 0.1-20 weight% of SO3.</p> |
