Analysis and Evaluation on Measurement Uncertainty of Apparent Porosity of Silica Refractory Bricks

According to GB/T 2997-2000, the apparent porosity of silica refractory bricks were measured and calculated. The measurement uncertainty component which affecting apparent porosity measurement was analyzed and evaluated. The various components of the measurement uncertainty were computed and synthetic, finally, the measurement uncertainty results of apparent porosity of silica refractory bricks were: πa=20.2%, U=0.2%, k=2.