ASTM C265-08
Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar

Standard No.

ASTM C265-08

Release Date

2008

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C265-08

Scope

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.

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.

1.4 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.

ASTM C265-08 Referenced Document

• ASTM C114 Standard Test Methods for Chemical Analysis of Hydraulic Cement
• ASTM C1157 Standard Performance Specification for Hydraulic Cement
• ASTM C150 Standard Specification for Portland Cement
• ASTM C219 Standard Terminology Relating to Hydraulic and Other Inorganic Cements
• ASTM C305 Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
• ASTM C563 Standard Test Method for Optimum SO3 in Hydraulic Cement Using 24-h Compressive Strength
• ASTM C595 Standard Specification for Blended Hydraulic Cements
• ASTM C778 Standard Specification for Standard Sand
• ASTM D1193 Standard Specification for Reagent Water
• ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes
• IEEE/ASTM SI 10 American National Standard for Metric Practice

ASTM C265-08 history

• 2008 ASTM C265-08 Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• 2006 ASTM C265-06 Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• 2003 ASTM C265-03a Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• 2003 ASTM C265-03 Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• 2001 ASTM C265-01 Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar
• 1999 ASTM C265-99 Standard Test Method for Water-Extractable Sulfate in Hydrated Hydraulic Cement Mortar