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根据透气法测定水泥比表面积的原理可知,空气透过具有确定的空隙率和厚度的粉末料层时,所受到的阻力与粉末料的比表面积相关。粉末料的比表面积越大,则空气透过时的阻力越大,一定量的空气透过时所用的时间越长。理论推导与试验数据表明:在相同试验条件下,空气透过样品所用的时间与样品比表
According to the principle of measuring the specific surface area of cement by the air permeability method, it can be seen that the resistance encountered when the air permeates the powder layer with a certain porosity and thickness is related to the specific surface area of the powder material. The larger the specific surface area of the powder material, the greater the resistance to air permeation and the longer the time taken for a given amount of air to pass through. Theoretical deduction and experimental data show that: under the same test conditions, the air through the sample with the time and sample ratio