ASTM C1702-23

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

SIGNIFICANCE AND USE
5.1 This method is suitable for determining the total heat of hydration of hydraulic cement at constant temperature at ages up to 7 days to confirm specification compliance.  
5.2 This method compliments Practice C1679 by providing details of calorimeter equipment, calibration, and operation. Practice C1679 emphasizes interpretation significant events in cement hydration by analysis of time dependent patterns of heat flow, but does not provide the level of detail necessary to give precision test results at specific test ages required for specification compliance.
SCOPE
1.1 This test method specifies the apparatus and procedure for determining total heat of hydration of hydraulic cementitious materials at test ages up to 7 days by isothermal conduction calorimetry.  
1.2 This test method also outputs data on rate of heat of hydration versus time that is useful for other analytical purposes, as covered in Practice C1679.  
1.3 The values stated in SI units are to be regarded as 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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.

General Information

• Status: Published
• Publication Date: 31-Jul-2023
• ICS: 17.200.10 - Heat. Calorimetry
• Technical Committee: C01 - Cement
• Drafting Committee: C01.26 - Heat of Hydration

Standards Content (Sample)

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.
Designation: C1702 − 23
Standard Test Method for
Measurement of Heat of Hydration of Hydraulic
Cementitious Materials Using Isothermal Conduction
1
Calorimetry
This standard is issued under the fixed designation C1702; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1.1 This test method specifies the apparatus and procedure
for determining total heat of hydration of hydraulic cementi-
3.1.1 baseline, n—the time-series signal from the calorim-
tious materials at test ages up to 7 days by isothermal eter when measuring output from a sample of approximately
conduction calorimetry.
the same mass and thermal properties as a cement sample, but
which is not generating or consuming heat.
1.2 This test method also outputs data on rate of heat of
3.1.2 heat, n—the time integral of thermal power measured
hydration versus time that is useful for other analytical
purposes, as covered in Practice C1679. in joules (J).
3.1.3 isothermal conduction calorimeter, n—a calorimeter
1.3 The values stated in SI units are to be regarded as
that measures heat flow from a sample maintained at a constant
standard. No other units of measurement are included in this
temperature by intimate thermal contact with a constant
standard.
temperature heat sink.
1.4 This standard does not purport to address all of the
3.1.4 reference cell, n—a heat-flow measuring cell that is
safety concerns, if any, associated with its use. It is the
dedicated to measuring power from a sample that is generating
responsibility of the user of this standard to establish appro-
no heat.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 3.1.4.1 Discussion—The purpose of the reference cell is to
1.5 This international standard was developed in accor- correct for baseline drift and other systematic errors that can
occur in heat-flow measuring equipment.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3.1.5 sensitivity, n—the minimum change in thermal power
Development of International Standards, Guides and Recom-
reliably detectable by an isothermal calorimeter.
mendations issued by the World Trade Organization Technical
3.1.5.1 Discussion—For this application, sensitivity is taken
Barriers to Trade (TBT) Committee.
as ten times the random noise (standard deviation) in the
baseline signal.
2. Referenced Documents
3.1.6 thermal mass, n—the amount of thermal energy that
2
2.1 ASTM Standards:
can be stored by a material (J/K).
C1679 Practice for Measuring Hydration Kinetics of Hy-
3.1.6.1 Discussion—The thermal mass of a given material is
draulic Cementitious Mixtures Using Isothermal Calorim-
calculated by multiplying the mass by the specific heat capacity
etry
of the material. For the purpose of calculating the thermal mass
E691 Practice for Conducting an Interlaboratory Study to
used in this standard, the following specific heat capacities can
Determine the Precision of a Test Method
be used: The specific heat capacity of a typical unhydrated
portland cement and water is 0.75 and 4.18 J/(g·K), respec-
tively. Thus a mixture of A g of cement and B g of water has
1
a thermal mass of (0.75 × A + 4.18 × B) J/K. The specific heat
This test method is under the jurisdiction of ASTM Committee C01 on Cement
and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.
capacity of typical quartz and limestone is 0.75 and
Current edition approved Aug. 1, 2023. Published August 2023. Originally
0.84 J ⁄(g·K), respectively. The specific heat capacity of most
approved in 2009. Last previous edition approved in 2017 as C1702 – 17. DOI:
amorphous supplementary cementitious material, such as fly
10.1520/C1702-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or ash or slag, is approximately 0.8 J/(g·K).
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.1.7 thermal power, n—the heat production rate measured
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. in joules per second (J/s).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1702 − 23
3.1.7.1 Discussion—This is the prope
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1702 − 17 C1702 − 23
Standard Test Method for
Measurement of Heat of Hydration of Hydraulic
Cementitious Materials Using Isothermal Conduction
1
Calorimetry
This standard is issued under the fixed designation C1702; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*Scope
1.1 This test method specifies the apparatus and procedure for determining total heat of hydration of hydraulic cementitious
materials at test ages up to 7 days by isothermal conduction calorimetry.
1.2 This test method also outputs data on rate of heat of hydration versus time that is useful for other analytical purposes, as
covered in Practice C1679.
1.3 The values stated in SI units are to be regarded as 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
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
2
2.1 ASTM Standards:
3
C186 Test Method for Heat of Hydration of Hydraulic Cement (Withdrawn 2019)
C1679 Practice for Measuring Hydration Kinetics of Hydraulic Cementitious Mixtures Using Isothermal Calorimetry
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 baseline, n—the time-series signal from the calorimeter when measuring output from a sample of approximately the same
mass and thermal properties as a cement sample, but which is not generating or consuming heat.
3.1.2 heat, n—the time integral of thermal power measured in joules (J).
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.
Current edition approved Feb. 1, 2017Aug. 1, 2023. Published February 2017August 2023. Originally approved in 2009. Last previous edition approved in 20152017 as
C1702 – 15b.C1702 – 17. DOI: 10.1520/C1702-17.10.1520/C1702-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1702 − 23
3.1.3 isothermal conduction calorimeter, n—a calorimeter that measures heat flow from a sample maintained at a constant
temperature by intimate thermal contact with a constant temperature heat sink.
3.1.4 reference cell, n—a heat-flow measuring cell that is dedicated to measuring power from a sample that is generating no heat.
3.1.4.1 Discussion—
The purpose of the reference cell is to correct for baseline drift and other systematic errors that can occur in heat-flow measuring
equipment.
3.1.5 sensitivity, n—the minimum change in thermal power reliably detectable by an isothermal calorimeter.
3.1.5.1 Discussion—
For this application, sensitivity is taken as ten times the random noise (standard deviation) in the baseline signal.
3.1.6 thermal mass, n—the amount of thermal energy that can be stored by a material (J/K).
3.1.6.1 Discussion—
The thermal mass of a given material is calculated by multiplying the mass by the specific heat capacity of the material. For the
purpose of calculating the thermal mass used in this standard, the following specific heat capacities can be used: The specific heat
capacity of a typical unhydrated portland cement and water is 0.75 and 4.18 J/(g·K), respectively. Thus a mixture of A g of cement
and B g of water has a thermal mass of (0.75 × A + 4.18 × B) J/K. The specific heat capacity of ty
...