| 摘要 |
PURPOSE: A brick composition with excellent strength is provided to neutralize strong alkali leachate generated in solidified bricks and to prevent the outflow of poisonous heavy metal by using a neutralizing agent including iron sludge and waste acid gypsum. CONSTITUTION: A brick composition comprises 0.02-0.1 parts by weight of an activator against the iron sludge 100.0, 30-50 parts by weight of an alkali activator, and 10-50 parts by weight of a neutralizing agent. The alkali activator is blast furnace slag. The neutralizing agent includes waste acid gypsum. The particle size of the blast furnace slag is 3000-4000cm / g. The neutralizing agent further includes clay. The alkali promoter is on the pH level of 12-14. The alkali promoter is one or more among NaOH, potassium hydroxide and lithium hydroxide. The waste acid gypsum is one or more among phospho-gypsum and hydrofluoric acid gypsum. |
