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ASTM International - ASTM C856-04

Standard Practice for Petrographic Examination of Hardened Concrete

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Organization: ASTM International
Publication Date: 1 January 2004
Status: inactive
Page Count: 17
ICS Code (Concrete and concrete products): 91.100.30
scope:

1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or portions thereof, or they may be concrete or mortar specimens that have been exposed in natural environments, or to simulated service conditions, or subjected to laboratory tests. The phrase "concrete constructions" is intended to include all sorts of objects, units, or structures that have been built of hydraulic cement concrete.

Note 1-A photographic chart of materials, phenomena, and reaction products discussed in Sections 7-12 and Table 1-6 are available as Adjunct C856 (ADJCO856).

1.2 The petrographic procedures outlined herein are applicable to the examination of samples of all types of hardened hydraulic-cement mixtures, including concrete, mortar, grout, plaster, stucco, terrazzo, and the like. In this practice, the material for examination is designated as "concrete," even though the commentary may be applicable to the other mixtures, unless the reference is specifically to media other than concrete.

1.3 outlines an uranyl acetate method for identifying locations where alkali-silica gel may be present. It is a requirement that the substances in those locations must be identified using any other more definitive techniques, such as petrographic microscopy.

1.4 The purposes of and procedures for petrographic examination of hardened concrete are given in the following sections:

Section
Qualifications of Petrographers and Use of Technicians3
Purposes of Examination4
Apparatus5
Selection and Use of Apparatus6
Samples 7
Examination of Samples8
Specimen Preparation9
Visual and Stereomicroscope Examination10
Polarizing Microscope Examination11
Paste Features12
Report13

1.5 The values stated in inch-pound units are to be regarded as the standard. The SI units in parentheses are provided for information purposes only.

1.6 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. A specific hazard statement is given in 5.2.10.1.

abstract:

This practice outlines the standard procedures for performing petrographic examination of hardened concrete samples. The samples examined may be taken from concrete constructions, that is, all... View More

Document History

July 1, 2018
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
March 1, 2018
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
January 1, 2017
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
June 1, 2014
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
November 1, 2013
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
April 1, 2011
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
ASTM C856-04
January 1, 2004
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
August 10, 2002
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
September 13, 1999
Standard Practice for Petrographic Examination of Hardened Concrete
1.1 This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or...
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