This test method covers determination of the fineness of hydraulic cement, using the Blaine airpermeability apparatus, in terms of the specific surface expressed as total surface area in squarecentimeters per gram, or square meters per kilogram of cement. Two test methods are given: TestMethod A is the Reference Test Method using the manually operated standard Blaine apparatus,while Test Method B permits the use of an automated apparatus that is in accordance with thequalification requirements of this test method’s demonstrated acceptable performance. Althoughthe test method may be, and has been, used for the determination of the measures of fineness ofvarious other materials, it should be understood that, in general, relative rather than absolutefineness values are obtained.
This test method is known to work well for portland cements. However, the user should exercise judgment in determining its suitability with regard to fineness measurements of cements with densities or porosities that differ from those assigned to Standard Reference Material No. 114.
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