ASTM C641-07

Standard Test Method for Iron Staining Materials in Lightweight Concrete Aggregates

SIGNIFICANCE AND USE
This test method evaluates the potential degree of staining attributable to the presence of iron compounds in a lightweight aggregate sample primarily by means of a visual classification method. Such compounds may or may not produce stains on the surface of the concrete in which the aggregate is incorporated.
SCOPE
1.1 This test method covers the testing of lightweight concrete aggregates to evaluate the potential degree of staining from iron compounds.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound values given in parentheses are provided for information only.
This standard does not purport to address 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2006
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.21 - Lightweight Aggregates and Concrete

Relations

• Replaces: ASTM C641-98e1 - Standard Test Method for Staining Materials in Lightweight Concrete Aggregates
• Effective Date: 01-Jan-2007
• Replaced By: ASTM C641-09 - Standard Test Method for Iron Staining Materials in Lightweight Concrete Aggregates
• Effective Date: 01-Oct-2009
• Referred By: ASTM C1761/C1761M-23 - Standard Specification for Lightweight Aggregate for Internal Curing of Concrete
• Effective Date: 01-Jan-2007
• Referred By: ASTM C331/C331M-23 - Standard Specification for Lightweight Aggregates for Concrete Masonry Units
• Effective Date: 01-Jan-2007
• Referred By: ASTM C330/C330M-23 - Standard Specification for Lightweight Aggregates for Structural Concrete
• Effective Date: 01-Jan-2007

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C641–07
Standard Test Method for
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Iron Staining Materials in Lightweight Concrete Aggregates
This standard is issued under the fixed designation C641; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 4. Apparatus
1.1 This test method covers the testing of lightweight 4.1 Balance—Abalanceorscaleaccuratetowithin0.1 %of
concrete aggregates to evaluate the potential degree of staining the test load at any point within the range of use.
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from iron compounds. 4.2 Sieves— 9.5-mm ( ⁄8-in.) and 600-µm (No. 30) sieves
1.2 The values stated in SI units are to be regarded as the conforming to Specification E11.
standard. The inch-pound values given in parentheses are 4.3 Filter Paper—250 6 10-mm diameter, rapid filtering,
provided for information only. highwetburstingstrength,quantitativegradewhitefilterpaper.
1.3 This standard does not purport to address the safety 4.4 Cheesecloth Wrapping—Twothicknesses,reagentgrade
problems associated with its use. It is the responsibility of the cheesecloth,approximately457mm(18in.)squareissufficient
user of this standard to establish appropriate safety and health for wrapping each sample.
practices and determine the applicability of regulatory limita- 4.5 Steam Bath—Any suitable apparatus that will meet the
tions prior to use. requirement of the test procedure. Water in the steam bath, and
makeup water, shall be iron-free water or distilled water.
2. Referenced Documents
NOTE 1—Anoventopglasswaresterilizermadeofnonferrousmaterials
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2.1 ASTM Standards:
is satisfactory.
C330 Specification for Lightweight Aggregates for Struc-
tural Concrete 5. Reagents
C331 Specification for Lightweight Aggregates for Con-
5.1 Purity of Reagents—Reagent grade chemicals shall be
crete Masonry Units
used in all tests. Unless otherwise indicated, it is intended that
C702 Practice for Reducing Samples of Aggregate to Test-
all reagents shall conform to the specifications of the Commit-
ing Size
tee onAnalytical Reagents of theAmerican Chemical Society,
D75 Practice for Sampling Aggregates 3
where such specifications are available.
E11 SpecificationforWovenWireTestSieveClothandTest
5.2 Purity of Water—Unless otherwise indicated, references
Sieves
to water shall be understood to mean distilled water or water of
equal purity.
3. Significance and Use
5.3 Concentration of Reagents:
3.1 This test method evaluates the potential degree of
5.3.1 ConcentratedAcid andAmmonium Hydroxide—When
staining attributable to the presence of iron compounds in a
reagents are specified by name it shall be understood that
lightweight aggregate sample primarily by means of a visual
concentrated reagents of the following specific gravity are
classification method. Such compounds may or may not
intended:
produce stains on the surface of the concrete in which the
Hydrochloric acid (HCl) sp gr 1.19
aggregate is incorporated.
Ammonium hydroxide (NH OH) sp gr 0.90
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5.3.2 Diluted acid is described in terms of the number of
volumes of the concentrated reagent to be added to a given
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This test method is under the jurisdiction of ASTM Committee C09 on
numberofvolumesofwater.ThusHCl(1 + 2)means1volume
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.21 on Lightweight Aggregates and Concrete.
of HCl (sp gr 1.19) added to 2 volumes of water.
Current edition approved Jan. 1, 2007. Published February 2007. Originally
´1
approved in 1969. Last previous edition approved in 1998 as C641 – 98 . DOI:
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10.1520/C0641-07. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Standards volume information, refer to the standard’s Document Summary page on Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United States
the ASTM website. Pharmacopeia.”
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C641–07
6. Sampling 7.6 When required by Specification C330 and Specification
C331, follow the procedure of the ChemicalAnalysis Method.
6.1 Sample in accordance with Practice D75.
7.6.1 Chemical Analys
...