1.1This specification pertains to the criteria and tests to be used for determining whether a(n) organic or inorganic processing addition, when used in the recommended amount at the option of the cement producer in the manufacture of hydraulic cements, meets the requirements as prescribed by definition in Specifications C150, C1157, C845, and C595. The materials listed in the following former ASTM Specifications shall be considered as meeting the organic processing additions requirements of this specification:

	C150 - 62, for Portland Cement
	C205 - 58 T, for Portland Blast-Furnace Slag Cement
	C340 - 58 T, for Portland Pozzolan Cement
	C358 - 58, for Slag Cement

1.2The following safety hazards caveat pertains only to the test methods described in this specification. 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.

1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.