Experimental results indicate the following: firstly, the initial cracking time of mortar increase and free shrinkage decrease with the percentage of blended fly ash increasing.
试验表明，随着粉煤灰掺量的增加，粉煤灰砂浆的初始开裂时间显著增加。
A small percentage of the world's fly ash is already absorbed by the construction industry as an additive to cement, and is mixed-in with clay in bricks.
小部分的粉煤灰已经被建筑业吸收用作生产水泥的添加物，和粘土一起烧成砖块。
A small percentage of the world's fly ash is already absorbed by the construction industry as an additive to cement, and is mixed-in with clay in bricks.
小部分的粉煤灰已经被建筑业吸收用作生产水泥的添加物，和粘土一起烧成砖块。
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