ASTM C265-06

Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar

SIGNIFICANCE AND USE
Excess soluble sulfate ions in hardened cement can result in reduced durability. This test method is intended to show whether calcium sulfate has been used in cement in such amount to leave excess soluble sulfate in hardened mortar. The test method is used to establish compliance in Specification C 595 for those cements in which optimized SO3 exceeds the table limit. This test method also can provide useful information on other hydraulic cements, such as those specified in Specifications C 150 and C 1157.
When this test method is used in conjunction with Test Method C 563, use the appropriate age of test specimens (24 h, 3 days, or 7 days) to coincide with the age of specimens used in Test Method C 563.
SCOPE
1.1 This test method covers the measurement of water-extractable SO3 in hardened hydraulic cement mortar. This measurement is assumed to represent unreacted, available sulfate remaining in the mortar.
1.1.1 Warning-Fresh hydraulic cementious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 Values in SI units were obtained by measurement in SI units or by appropriate conversion using the Rules for Conversion and Rounding given in IEEE/ASTM SI-10 Standard of measurements made in other units.
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: 30-Jun-2006
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.28 - Sulfate Content

Relations

• Replaces: ASTM C265-03a - Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• Effective Date: 01-Jul-2006
• Replaced By: ASTM C265-08 - Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar (Withdrawn 2017)
• Effective Date: 01-May-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C265–06
Standard Test Method for
Water-Extractable Sulfate in Hydrated Hydraulic Cement
1
Mortar
This standard is issued under the fixed designation C 265; 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.
1. Scope* C 563 Test Method for Optimum SO in Hydraulic Cement
3
Using 24-h Compressive Strength
1.1 This test method covers the measurement of water-
C 595 Specification for Blended Hydraulic Cements
extractable SO in hardened hydraulic cement mortar. This
3
C 778 Specification for Standard Sand
measurement is assumed to represent unreacted, available
C 1157 Performance Specification for Hydraulic Cement
sulfate remaining in the mortar.
D 1193 Specification for Reagent Water
1.1.1 Warning—Fresh hydraulic cementious mixtures are
E11 Specification for Wire Cloth and Sieves for Testing
caustic and may cause chemical burns to skin and tissue upon
Purposes
prolonged exposure.
IEEE/ASTM SI-10 Standard for Use of the International
1.2 The values stated in SI units are to be regarded as the
System of Units (SI): The Modern Metric System
standard. The values given in parentheses are for information
only.
3. Terminology
1.3 Values in SI units were obtained by measurement in SI
3.1 Definitions—The terms used in this test method are
units or by appropriate conversion using the Rules for Conver-
defined in accordance with Terminology C 219.
sion and Rounding given in IEEE/ASTM SI-10 Standard of
measurements made in other units.
4. Significance and Use
1.4 This standard does not purport to address all of the
4.1 Excess soluble sulfate ions in hardened cement can
safety concerns, if any, associated with its use. It is the
result in reduced durability. This test method is intended to
responsibility of the user of this standard to establish appro-
show whether calcium sulfate has been used in cement in such
priate safety and health practices and determine the applica-
amount to leave excess soluble sulfate in hardened mortar. The
bility of regulatory limitations prior to use.
test method is used to establish compliance in Specification
2. Referenced Documents C 595 for those cements in which optimized SO exceeds the
3
2 table limit. This test method also can provide useful informa-
2.1 ASTM Standards:
tion on other hydraulic cements, such as those specified in
C 109/C 109M Test Method for Compressive Strength of
Specifications C 150 and C 1157.
Hydraulic Cement Mortars(Using 2-in. or [50-mm] Cube
4.2 When this test method is used in conjunction with Test
Specimens)
Method C 563, use the appropriate age of test specimens (24 h,
C114 Test Methods for Chemical Analysis of Hydraulic
3 days, or 7 days) to coincide with the age of specimens used
Cement
in Test Method C 563.
C 150 Specification for Portland Cement
C 219 Terminology Relating to Hydraulic Cement
5. Apparatus
C 305 PracticeforMechanicalMixingofHydraulicCement
5.1 Sieve—A 2.36-mm (No.8) sieve conforming to Specifi-
Pastes and Mortars of Plastic Consistency
cationE11.
5.2 Mixer, Bowl, and Paddle—An electrically driven me-
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement chanical mixer equipped with a paddle and bowl, as specified
and is the direct responsibility of Subcommittee C01.28 on Sulfate Content.
in the Apparatus section of Practice C 305.
Current edition approved July 1, 2006. Published August 2006. Originally
5.3 Polyethylene Containers—Watertightpolyethylenebags
approved in 1951. Last previous edition approved in 2003 as C 265 – 03a.
2
of 1-L (1-qt) capacity or approximately 360-mm (14-in.) sheet
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
material, made using polyethylene at least 0.10-mm (0.004-in.)
Standards volume information, refer to the standard’s Document Summary page on
in thickness.
the ASTM website.
*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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C265–06
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5.4 Mortar and Pestle—Amortar of 1.5-L(1 ⁄2-qt) size, and a type and speed that all particles of the slurry are suspended,
a pestle, both of which shall be iron or porcelain. with no settling and no appreciable increase of the temperature
5.5 Water Bath—Awater bath thermostatically controlled at of the slurry occurs.
23.0 6 0.15 °C . 10.2 Filter the slurry on a dry No. 2A Büchner funnel with
the aid of suction using a dry 90-mm, medium, ashless paper.
6. Reagents and
...