ASTM C1702-15b
(Test Method)Standard Test Method for Measurement of Heat of Hydration of Hydraulic Cementitious Materials Using Isothermal Conduction Calorimetry
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. It gives test results equivalent to Test Method C186 up to 7 days of age (1).3
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C1702 − 15b
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* the same mass and thermal properties as a cement sample, but
which is not generating or consuming heat.
1.1 This test method specifies the apparatus and procedure
for determining total heat of hydration of hydraulic cementi- 3.1.2 heat, n—the time integral of thermal power measured
tious materials at test ages up to 7 days by isothermal in joules (J).
conduction calorimetry.
3.1.3 isothermal conduction calorimeter, n—a calorimeter
1.2 This test method also outputs data on rate of heat of
thatmeasuresheatflowfromasamplemaintainedataconstant
hydration versus time that is useful for other analytical temperature by intimate thermal contact with a constant
purposes, as covered in Practice C1679. temperature heat sink.
1.3 The values stated in SI units are to be regarded as 3.1.4 reference cell, n—a heat-flow measuring cell that is
standard. No other units of measurement are included in this
dedicatedtomeasuringpowerfromasamplethatisgenerating
standard. no heat.
3.1.4.1 Discussion—The purpose of the reference cell is to
1.4 This standard does not purport to address all of the
correct for baseline drift and other systematic errors that can
safety concerns, if any, associated with its use. It is the
occur in heat-flow measuring equipment.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.1.5 sensitivity, n—the minimum change in thermal power
bility of regulatory limitations prior to use.
reliably detectable by an isothermal calorimeter.
3.1.5.1 Discussion—Forthisapplication,sensitivityistaken
2. Referenced Documents
as ten times the random noise (standard deviation) in the
2
2.1 ASTM Standards:
baseline signal.
C186Test Method for Heat of Hydration of Hydraulic
3.1.6 thermal mass, n—the amount of thermal energy that
Cement
can be stored by a material (J/K).
C1679Practice for Measuring Hydration Kinetics of Hy-
3.1.6.1 Discussion—Thethermalmassofagivenmaterialis
draulic Cementitious Mixtures Using Isothermal Calorim-
calculatedbymultiplyingthemassbythespecificheatcapacity
etry
ofthematerial.Forthepurposeofcalculatingthethermalmass
E691Practice 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-
3. Terminology
tively. Thus a mixture of A g of cement and B g of water has
3.1 Definitions of Terms Specific to This Standard:
a thermal mass of (0.75 × A + 4.18 × B) J/K. The specific heat
3.1.1 baseline, n—the time-series signal from the calorim-
capacity of typical quartz and limestone is 0.75 and
eter when measuring output from a sample of approximately
0.84J⁄(g·K), respectively. The specific heat capacity of most
amorphous supplementary cementitious material, such as fly
1 ash or slag, is approximately 0.8 J/(g·K).
ThistestmethodisunderthejurisdictionofASTMCommitteeC01onCement
and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.
3.1.7 thermal power, n—the heat production rate measured
Current edition approved Dec. 1, 2015. Published January 2016. Originally
in joules per second (J/s).
approved in 2009. Last previous edition approved in 2015 as C1702–15a. DOI:
10.1520/C1702-15B.
3.1.7.1 Discussion—This is the property measured by the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
calorimeter.ThethermalpowerunitofmeasureisJ/s,whichis
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
equivalent to the watt. The watt is also a common unit of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. measure used to represent thermal power.
*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 − 15b
4. Summary of Test Method 6.1.2 Volumetric Dispenser—A device for measuring vol-
ume or mass of water, accurate to 0.1 mL. This could be a
4.1 Principle—An isothermal heat conduction calorimeter
syringe, pipette, or weighing device.
consists of a constant-temperature he
...
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 − 15a C1702 − 15b
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*
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C186 Test Method for Heat of Hydration of Hydraulic Cement
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).
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.
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 Aug. 1, 2015Dec. 1, 2015. Published August 2015January 2016. Originally approved in 2009. Last previous edition approved in 2015 as
C1702 – 15.C1702 – 15a. DOI: 10.1520/C1702-15A.10.1520/C1702-15B.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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—
*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
---------------------- Page: 1 ----------------------
C1702 − 15b
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 typical quartz and limestone is
0.75 and 0.84 J ⁄(g·K), respectively. The specific heat capacity of most amorphous supplementary cementitious material, such as
fly ash or slag, is approximately 0.8 J/(g·K).
3.1.7 thermal power, n—the heat production rate measured in joules per second (J/s).
3.1.7.1 Discussion—
This is the property measured by the calorimeter. The t
...
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