| 摘要 |
<p>An alkali-free accelerator for concrete mixtures comprises the following components as initial materials: from 10% to 80% by weight of aluminium nitrate in 6% solution, from 5 to 30% by weight of alumina, up to 30% by weight of sulphuric acid, from 5 to 40% by weight of fluorosilicic acid, up to 5.0% by weight of diethanolamine, and water in sufficient quantity. The accelerator may further comprise up to 60% by weight of aluminium sulphate in 8% solution.</p> |
