Optimal waste gypsum mixed is roughly 20% of cement by weight.

废石膏的最佳掺量一般为水泥用量的20 %左右。

youdao

The optimal amount of gypsum is about 20% of cement by weight.

废石膏的最佳掺量一般为水泥用量的20%左右。

youdao

The optimal amount of gypsum is about 20% of cement by weight.

废石膏的最佳掺量一般为水泥用量的20%左右。

youdao