ASTM C295-03

Standard Guide for Petrographic Examination of Aggregates for Concrete

SCOPE
1.1 This guide outlines procedures for the petrographic examination of samples representative of materials proposed for use as aggregates in cementitious mixtures or as raw materials for use in production of such aggregates. This guide is based on Ref (1).
1.2 This guide outlines the extent to which petrographic techniques should be used, the selection of properties that should be looked for, and the manner in which such techniques may be employed in the examination of samples of aggregates for concrete.
1.3 The rock and mineral names given in Descriptive Nomenclature C 294 should be used, insofar as they are appropriate, in reports prepared in accordance with this guide.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
1.5 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.

General Information

• Status: Historical
• Publication Date: 09-Jan-2003
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.65 - Petrography

Relations

• Replaces: ASTM C295-98 - Standard Guide for Petrographic Examination of Aggregates for Concrete
• Effective Date: 10-Jan-2003
• Replaced By: ASTM C295-08 - Standard Guide for Petrographic Examination of Aggregates for Concrete
• Effective Date: 01-Jul-2008
• Referred By: ASTM C823/C823M-12(2017) - Standard Practice for Examination and Sampling of Hardened<brk/> Concrete in Constructions
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1105-08a(2016) - Standard Test Method for Length Change of Concrete Due to Alkali-Carbonate Rock Reaction
• Effective Date: 10-Jan-2003
• Referred By: ASTM C666/C666M-15 - Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1528/C1528M-20 - Standard Guide for Selection of Dimension Stone
• Effective Date: 10-Jan-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C295–03
Standard Guide for
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Petrographic Examination of Aggregates for Concrete
This standard is issued under the fixed designation C 295; 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.
This standard has been approved for use by agencies of the Department of Defense.
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1. Scope D 75 Practice for Sampling Aggregates
E 11 Specification for Wire Cloth and Sieves for Testing
1.1 This guide outlines procedures for the petrographic
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Purposes
examination of samples representative of materials proposed
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E 883 Guide for Reflected-Light Photomicrography
for use as aggregates in cementitious mixtures or as raw
materials for use in production of such aggregates. This guide
3. Summary of Method
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is based on Ref (1).
3.1 The specific procedures employed in the petrographic
1.2 This guide outlines the extent to which petrographic
examination of any sample will depend to a large extent on the
techniques should be used, the selection of properties that
purpose of the examination and the nature of the sample. In
should be looked for, and the manner in which such techniques
most cases the examination will require the use of optical
may be employed in the examination of samples of aggregates
microscopy. Complete petrographic examinations for particu-
for concrete.
lar purposes and to investigate particular problems may require
1.3 The rock and mineral names given in Descriptive
examination of aggregates or of selected constituents by means
Nomenclature C 294 should be used, insofar as they are
of additional procedures, such as X-ray diffraction (XRD)
appropriate, in reports prepared in accordance with this guide.
analysis,differentialthermalanalysis(DTA),infraredspectros-
1.4 The values stated in SI units are to be regarded as the
copy, or other scanning electron microscopy (SEM) energy-
standard. The values given in parentheses are provided for
dispersive x-ray analysis (EDX). In some instances, such
information purposes only.
procedures are more rapid and more definitive than are
1.5 This standard does not purport to address all of the
microscopical methods.
safety concerns, if any, associated with its use. It is the
3.2 Identification of the constituents of a sample is usually a
responsibility of the user of this standard to establish appro-
necessary step towards recognition of the properties that may
priate safety and health practices and determine the applica-
be expected to influence the behavior of the material in its
bility of regulatory limitations prior to use.
intendeduse,butidentificationisnotanendinitself.Thevalue
2. Referenced Documents of any petrographic examination will depend to a large extent
on the representativeness of the samples examined, the com-
2.1 ASTM Standards:
3 pleteness and accuracy of the information provided to the
C 33 Specification for Concrete Aggregates
petrographer concerning the source and proposed use of the
C 117 Test Method for Materials Finer than 75-µm (No.
3 material, and the petrographer’s ability to correlate these data
200) Sieve in Mineral Aggregates by Washing
with the findings of the examination.
C 136 Test Method for Sieve Analysis of Fine and Coarse
3 3.3 This guide does not attempt to describe the techniques
Aggregates
of petrographic work since it is assumed that the guide will be
C 294 Descriptive Nomenclature for Constituents of Con-
3
used by persons who are qualified by education and experience
crete Aggregates
to employ such techniques for the recognition of the charac-
C 702 Practice for Reducing Samples of Aggregate to
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teristic properties of rocks and minerals and to describe and
Testing Size
classifytheconstituentsofanaggregatesample.Insomecases,
the petrographer will have had experience adequate to provide
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This guide is under the jurisdiction ofASTM Committee C09 on Concrete and
Concrete Aggregates and is the direct responsibility of Subcommittee C09.65 on
Petrography.
Current edition approved Jan. 10, 2003. Published March 2003. Originally
approved in 1954. Last previous edition approved in 1998 as C 295-98.
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The boldface numbers in parentheses refer to the list of references at the end of Annual Book of ASTM Standards, Vol 04.03.
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this standard. Annual Book of ASTM Standards, Vol 14.02.
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Annual Book of ASTM Standards, Vol 04.02. Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C295–03
detailed interpretation of the results. In others, the interpreta- otherwise altere
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