This standard is issued under the fixed designation C 151; 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 151 - 00 Standard Test Method for Autoclave Expansion of Portland Cement1 This standard is issued under the fixed d ii r atic n c 151 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 autoclave expansion of portland cement by means of a test on a neat cement specimen. The values stated in inch-pound 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. For specific precaution statements see the section on Safety Precautions. 2. Referenced Documents ASTM Standards C 187 Test Method for Normal Consistency of Hydraulic Cement2 C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency2 C 490 Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste Mortar and Concrete2 C 511 Specification For Moiss CiT i iM lte Moiss Rooms and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes2 C 1005 Specification lor Weights and Weiglfing Devices for Use in the Physical Testing of Hydraulic Cements2 3. Significance and Use The autoclave expansion test provides an index of potential delayed expansion caused by the hydration of CaO or MgO or both when present in portland 4. Apparatus Weighing Devices and Weights for determining the mass of materials conforming to the requirements of Specif -cation C 1005. Glass Graduates 200 or 250-mL capacity and conform 1 This test method
