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    ASTM C1012 / C1012M - 18b

    Standard Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution

    Active Standard ASTM C1012 / C1012M | Developed by Subcommittee: C01.29

    Book of Standards Volume: 04.01

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    Significance and Use

    3.1 This test method provides a means of assessing the sulfate resistance of mortars made using portland cement, blends of portland cement with pozzolans or slags, and blended hydraulic cements. Test Method C452 is suitable for evaluating portland cements but not blended cements or blends of portland cement with pozzolans or slags.

    3.2 The standard exposure solution used in this test method, unless otherwise directed, contains 352 moles of Na2SO4 per m3 (50 g/L). Other sulfate concentrations or other sulfates such as MgSO4 may be used to simulate the environmental exposure of interest. Further discussion of these and other technical issues is given in the Appendix.

    1. Scope

    1.1 This test method covers the determination of length change of mortar bars immersed in a sulfate solution. Mortar bars made using mortar described in Test Method C109/C109M are cured until they attain a compressive strength of 20.0 ± 1.0 MPa [3000 ± 150 psi], as measured using cubes made of the same mortar, before the bars are immersed.

    1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

    1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)

    C114 Test Methods for Chemical Analysis of Hydraulic Cement

    C150/C150M Specification for Portland Cement

    C157/C157M Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete

    C215 Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens

    C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

    C348 Test Method for Flexural Strength of Hydraulic-Cement Mortars

    C349 Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)

    C452 Test Method for Potential Expansion of Portland-Cement Mortars Exposed to Sulfate

    C490/C490M Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete

    C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

    C595/C595M Specification for Blended Hydraulic Cements

    C597 Test Method for Pulse Velocity Through Concrete

    C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

    C778 Specification for Standard Sand

    C989/C989M Specification for Slag Cement for Use in Concrete and Mortars

    C1157/C1157M Performance Specification for Hydraulic Cement

    D1193 Specification for Reagent Water

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    American Concrete Institute Reports

    ACI C201-2R-01 Guide to Durable Concrete Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094, http://www.concrete.org.

    ICS Code

    ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

    UNSPSC Code

    UNSPSC Code 30111504(Mortars)

    Referencing This Standard
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    DOI: 10.1520/C1012_C1012M-18B

    Citation Format

    ASTM C1012 / C1012M-18b, Standard Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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