ASTM C641-98e1

Standard Test Method for Staining Materials in Lightweight Concrete Aggregates

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 inch-pound units are to be regarded as the standard.  
1.3 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: 09-Nov-1999
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.21 - Lightweight Aggregates and Concrete

Relations

• Replaced By: ASTM C641-07 - Standard Test Method for Iron Staining Materials in Lightweight Concrete Aggregates
• Effective Date: 01-Jan-2007
• Referred By: ASTM C330/C330M-23 - Standard Specification for Lightweight Aggregates for Structural Concrete
• Effective Date: 10-Nov-1999
• Referred By: ASTM C331/C331M-23 - Standard Specification for Lightweight Aggregates for Concrete Masonry Units
• Effective Date: 10-Nov-1999
• Referred By: ASTM C1761/C1761M-23 - Standard Specification for Lightweight Aggregate for Internal Curing of Concrete
• Effective Date: 10-Nov-1999

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation:C641–98
Standard Test Method for
Iron Staining Materials in Lightweight Concrete Aggregates
This standard is issued under the fixed designation C 641; 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.
e NOTE—Editorial corrections were applied to Figure 3 and 9.1.2.
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.
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 E 11.
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—Two thicknesses, reagent grade
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
2.1 ASTM Standards:
is satisfactory.
C 330 Specification for Lightweight Aggregates for Struc-
tural Concrete 5. Reagents
C 331 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
C 702 Practice for Reducing Field Samples ofAggregate to
all reagents shall conform to the specifications of the Commit-
Testing Size
tee onAnalytical Reagents of theAmerican Chemical Society,
D 75 Practice for Sampling Aggregates 3
where such specifications are available.
E 11 Specification for Wire-Cloth and Sieves for Testing
5.2 Purity of Water—Unless otherwise indicated, references
Purposes
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
ThistestmethodisunderthejurisdictionofASTMCommitteeC-9onConcrete
and ConcreteAggregatesand is the direct responsibility of Subcommittee C09.21on “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
Lightweight Aggregates. cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
Current edition approved Nov. 10, 1998. Published May 1999. Originally theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
published as C 641 – 69. Last previous edition C 641 – 82 (1991). Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United States
Annual Book of ASTM Standards, Vol 04.02. Pharmacopeia.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C641
5.3.2 Diluted acid is described in terms of the number of 7.5 Rate the extent of staining on the filter papers by the
volumes of the concentrated reagent to be added to a given Visual Classification Method.
numberofvolumesofwater.ThusHCl(1 + 2)means1volume
7.5.1 Visual Classification Method—Evaluatetheextentand
of HCl (sp gr 1.19) added to 2 volumes of water.
intensity of the sta
...