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    ASTM C1897 - 20

    Standard Test Methods for Measuring the Reactivity of Supplementary Cementitious Materials by Isothermal Calorimetry and Bound Water Measurements

    Active Standard ASTM C1897 | Developed by Subcommittee: C09.24

    Book of Standards Volume: 04.02

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    Significance and Use

    5.1 These test methods are used to assess the chemical (pozzolanic or hydraulic) reactivity of SCMs over a curing time of 7 days. The results of these test methods can be used to estimate the potential contribution of a SCM to the development of strength, or other properties such as lower permeability, when used with portland cement. However, the test results are not a substitute for direct measurement of the same properties of concrete made with that SCM.

    5.2 The calcium hydroxide, calcium carbonate, potassium sulfate, and potassium hydroxide are combined in proportions to provide a paste where the dissolved ions from these components simulate the pore solution in a portland cement system.

    5.3 The pastes are cured at 40 °C to accelerate the rate of reaction of slowly reactive SCMs.

    5.4 These test methods allow for the direct measurement of the hydraulic or pozzolanic reactivity of a potential SCM. These test methods are also suitable for screening purposes in the development and research of SCMs for use in portland cement-based systems. Furthermore, these test methods may be used in manufacturing control of portland cement-based products for assessing the hydraulic or pozzolanic reactivity of a SCM component.

    5.5 These test methods are based on the work by Avet et al.4 and are a result of the work of RILEM Technical Committee 267 – Tests for Reactivity of Supplementary Cementitious Materials.5 The test methods are based on established correlations between strength development and evolution of heat and binding of water for SCMs covered by Specifications C618, C989/C989M, and C1240, and by Guide C1709. For other alternative SCMs, the validity of such correlations has not been established.

    5.6 There is no requirement to use Method A and Method B for a given application. In many instances the choice is based on the user’s determination of available equipment. Method A can also provide an indication of rate of reactivity because measurements are taken continuously during the test period, while Method B provides the level of reactivity up to a single point in time.

    1. Scope

    1.1 These two alternative test methods are used to assess the chemical reactivity of a supplementary cementitious material (SCM) as determined by measurements of cumulative heat release or bound water content of hydrated pastes composed of the SCM, calcium hydroxide, calcium carbonate, potassium sulfate, and potassium hydroxide cured at 40 °C for 3 and 7 days.

    1.1.1 These two test methods do not distinguish between hydraulic and pozzolanic reactivity.

    1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

    1.3 The text of the standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.

    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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)2

    1.5 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

    C114 Test Methods for Chemical Analysis of Hydraulic Cement

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C311/C311M Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete

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

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

    C1240 Specification for Silica Fume Used in Cementitious Mixtures

    C1702 Test Method for Measurement of Heat of Hydration of Hydraulic Cementitious Materials Using Isothermal Conduction Calorimetry

    C1709 Guide for Evaluation of Alternative Supplementary Cementitious Materials (ASCM) for Use in Concrete

    C1738/C1738M Practice for High-Shear Mixing of Hydraulic Cement Pastes

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves

    Referencing This Standard
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    DOI: 10.1520/C1897-20

    Citation Format

    ASTM C1897-20, Standard Test Methods for Measuring the Reactivity of Supplementary Cementitious Materials by Isothermal Calorimetry and Bound Water Measurements, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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