| 摘要 |
<p>A new high sulphate slag cement with a Blaine specific surface ratio of 4500-5500 cm<2>/g, consists of water-granulated blast furnace slag (80-85%) which contains the following ingredients as indicated; CaO (40-50%), Al2O3 (14- 20%), SiO2 (30-35%), MgO (5-8%) and, in addition to the slag described above, the additional following ingredients; CaSO4 (13-17%), Portland cement (1.5-2.5%), organic carbonic acid or its alkali metal salts (0.1- 0.5%), water-soluble highly polymerized compounds (0.03- 0.6) e.g. methyl cellulose sodium stearate, and sodium benzene sulphate, and sodium sulphate (0.6-2%). The basicity of the slag may be increased by heating with Al2O3 and/or CaO and regranulating with water.</p> |
