| 1. | Baking - free brick was made by using fly ash , sand , cement and other industrial wastes , which makes the cost of material low . furthermore , when it was made , the degree of mechanization is very high , using few workers , production cycle is short , thus the cost was lowered
免烧砖是采用粉煤灰、砂子、石粉、矿渣等工业废渣按一定比例加入水泥振动，强力压制而成，原料来源价格低，加之生产时机械化程度高，用人少，生产周期短，因此成本低，免烧砖的价格比红砖低，装卸时不容易损坏边角，且没有粉尘，卫生条件好，对人体的呼吸道伤害小。 |
