This standard is issued under the fixed designation C 204; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. | Designation C 204 00 American Association State Highway and Transportation Officials Standard AASHTO No. T 153 Standard Test Method for Fineness of Hydraulic Cement by Air-Permeability Apparatus1 This standard is issued under the fixed d ii r atic n c 204 the number immediately fc llc Wr ig the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1. Scope This test method covers determination of the finetmss of hydraulic cement using the Blaine air-permeability apparatus in terms of the specific surface expressed as lota 1 surface area in square centimetres per gram or square metres per kilogram of cement. Although the test method may be and has been used for the determination of the measures of fneness of various other materials it should be understood that in general relative rather than absolute fineness vahics arc obtained. This test method is known to work well for portland cements. However the user should exercise judgement in determining its suitability with regard to fneness measurements of cements with densities or porosities that differ from those assigned to Standard Reference Material No. 114. The values stated in SI units are to be regarded as the standard. This standard does not purport to address all of the safety concerns if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents ASTM Standards A 582 A 582M Specification for Free-Machining Stahncss and Heat-Resisting Steel Bars2 C 670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials3 E 832 Specification for Laboratory Fiilt e Prap e 4 Other Document
