ASTM C88 - 13

    Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

    Active Standard ASTM C88 | Developed by Subcommittee: C09.20

    Book of Standards Volume: 04.02


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    ASTM C88

    Significance and Use

    3.1 This test method provides a procedure for making a preliminary estimate of the soundness of aggregates for use in concrete and other purposes. The values obtained may be compared with specifications, for example Specification C33, that are designed to indicate the suitability of aggregate proposed for use. Since the precision of this test method is poor (Section 12), it may not be suitable for outright rejection of aggregates without confirmation from other tests more closely related to the specific service intended.

    3.2 Values for the permitted-loss percentage by this test method are usually different for fine and coarse aggregates, and attention is called to the fact that test results by use of the two salts differ considerably and care must be exercised in fixing proper limits in any specifications that include requirements for these tests. The test is usually more severe when magnesium sulfate is used; accordingly, limits for percent loss allowed when magnesium sulfate is used are normally higher than limits when sodium sulfate is used.

    Note 1Refer to the appropriate sections in Specification C33 establishing conditions for acceptance of coarse and fine aggregates which fail to meet requirements based on this test.

    1. Scope

    1.1 This test method covers the testing of aggregates to estimate their soundness when subjected to weathering action in concrete or other applications. This is accomplished by repeated immersion in saturated solutions of sodium or magnesium sulfate followed by oven drying to partially or completely dehydrate the salt precipitated in permeable pore spaces. The internal expansive force, derived from the rehydration of the salt upon re-immersion, simulates the expansion of water on freezing. This test method furnishes information helpful in judging the soundness of aggregates when adequate information is not available from service records of the material exposed to actual weathering conditions.

    1.2 The values given in parentheses are provided for information purposes only.

    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.


    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

    C33 Specification for Concrete Aggregates

    C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates

    C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

    C702 Practice for Reducing Samples of Aggregate to Testing Size

    D75 Practice for Sampling Aggregates

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves

    E100 Specification for ASTM Hydrometers

    E323 Specification for Perforated-Plate Sieves for Testing Purposes


    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    UNSPSC Code

    UNSPSC Code 30111800(Aggregates)


    DOI: 10.1520/C0088

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