1. Scope
1.1 This practice describes the apparatus and procedure for evaluating relative differences in hydration of hydraulic cementitious mixtures in paste, mortar, or concrete, including those containing admixtures, various supplementary cementitious materials (SCM), and other fine materials, by measuring temperature change over time using temperature-recording equipment. 1.2 Calorimetry is the measurement of heat lost or gained during a chemical reaction such as cement hydration; these measurements as a function of time can be used to describe and evaluate hydration and related influences. Calorimetry may be performed under isothermal conditions (as described in Practice C1679) or under adiabatic or semi-adiabatic conditions. While the method covered in this practice cannot be described as calorimetry since measurements are not quantitative, it can be used for similar applications. Variables that should be considered are discussed in the Appendix. 1.3 Units-The values stated in SI units are to be regarded as the standard. No other units of measurement are included in 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 and health 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.)
This practice can be used as a research and quality control tool by concrete producers, contractors, materials suppliers, and researchers.
Keywords
cementadmixture interactions; thermal measurement testing; hydration; thermal profiles; sulfate balance
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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