The unfired and uncured mud brick made of red mud, fly ash, aggregates and so on is pressed and cured in nature.
利用中铝赤泥、粉煤灰、骨料等材料采用模压成型，自然养护制成了赤泥免烧免蒸砖。
Sintering-expanded haydite has been prepared by using red mud with glasses, fly ash and a little of other additive.
以拜耳法赤泥为主要原料，通过掺加废玻璃、粉煤灰等固体废弃物，再加入少量的添加剂制备烧胀陶粒。
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