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ASTM C457-98

Historical Revision

Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete

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1.1 This test method describes procedures for microscopical determinations of the air content of hardened concrete and of the specific surface, void frequency, spacing factor, and paste-air ratio of the air-void system in hardened concrete (1). Two procedures are described:

1.1.1 Procedure A , the linear-traverse method (2, 3).

1.1.2 Procedure B , the modified point-count method (3, 4, 5, 6).

1.2 This test method is based on prescribed procedures that are applied to sawed and lapped sections of specimens of concrete from the field or laboratory.

1.3 It is intended to outline the principles of this test method and to establish standards for its adequate performance but not to describe in detail all the possible variations that might be used to accomplish the objectives of this test method.

1.4 The values stated in inch-pound units are to be regarded as the standard.

1.5 This standard does not purport to address all of the safety problems 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 hazard statements see Notes 3 and 6.


SDO ASTM: ASTM International
Document Number C457
Publication Date July 10, 1998
Language en - English
Page Count 14
Revision Level 98
Supercedes
Committee C09.65
Publish Date Document Id Type View
July 1, 2009 C0457-09 Revision
Dec. 15, 2008 C0457-08D Revision
Oct. 1, 2008 C0457-08C Revision
July 1, 2008 C0457-08B Revision
May 1, 2008 C0457-08A Revision
Jan. 1, 2008 C0457-08 Revision
Jan. 1, 2006 C0457-06 Revision
July 10, 1998 C0457-98 Revision