
Silica fume rate in mixing concrete with microsilica
Precautions for the use of micro silicon powder: 1, content: generally the amount is 5-10% cementitious material. The method of adding silica fume are internal and external admixture. (1) internal mixing: under the premise of constant water volume, 1 silica fume can replace 3-5 times cement (weight) and keep the…