ASTM C1702-14
(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 (Poole (2007) (1)).
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 − 14
StandardTest 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* 3.1.1 baseline, n—the time-series signal from the calorim-
eter when measuring output from a sample of approximately
1.1 This test method specifies the apparatus and procedure
the same mass and thermal properties as a cement sample, but
for determining total heat of hydration of hydraulic cementi-
which is not generating or consuming heat.
tious materials at test ages up to 7 days by isothermal
conduction calorimetry. 3.1.2 heat, n—the time integral of thermal power measured
in joules (J).
1.2 This test method also outputs data on rate of heat of
hydration versus time that is useful for other analytical 3.1.3 isothermal conduction calorimeter, n—a calorimeter
purposes, as covered in Practice C1679. thatmeasuresheatflowfromasamplemaintainedataconstant
temperature by intimate thermal contact with a constant
1.3 The values stated in SI units are to be regarded as
temperature heat sink.
standard. No other units of measurement are included in this
standard. 3.1.4 reference cell, n—a heat-flow measuring cell that is
dedicatedtomeasuringpowerfromasamplethatisgenerating
1.4 This standard does not purport to address all of the
no heat.
safety concerns, if any, associated with its use. It is the
3.1.4.1 Discussion—The purpose of the reference cell is to
responsibility of the user of this standard to establish appro-
correct for baseline drift and other systematic errors that can
priate safety and health practices and determine the applica-
occur in heat-flow measuring equipment.
bility of regulatory limitations prior to use.
3.1.5 sensitivity, n—the minimum change in thermal power
2. Referenced Documents
reliably detectable by an isothermal calorimeter.
2
2.1 ASTM Standards:
3.1.5.1 Discussion—Forthisapplication,sensitivityistaken
C186Test Method for Heat of Hydration of Hydraulic
as ten times the random noise (standard deviation) in the
Cement
baseline signal.
C670Practice for Preparing Precision and Bias Statements
3.1.6 thermal mass, n—the amount of thermal energy that
for Test Methods for Construction Materials
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
capacity of typical quartz and limestone is 0.75 and 0.84
1 J/(g·K), respectively. The specific heat capacity of most amor-
ThistestmethodisunderthejurisdictionofASTMCommitteeC01onCement
and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration. phous supplementary cementitious material, such as fly ash or
Current edition approved July 15, 2014. Published August 2014. Originally
slag, is approximately 0.8 J/(g·K).
approved in 2009. Last previous edition approved in 2013 as C1702–13a. DOI:
10.1520/C1702-14.
3.1.7 thermal power, n—the heat production rate measured
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
in joules per second (J/s).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.7.1 Discussion—This is the property measured by the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. calorimeter.ThethermalpowerunitofmeasureisJ/s,whichis
*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 − 14
equivalent to the watt. The watt is also a common unit of 6.1.2 Volumetric Dispenser—A device for measuring vol-
measure used to represent thermal power. ume or mass of water, accurate to 0.1 mL. This could be a
syringe, pipette, or weighing device.
4. Summary of Test
...
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 − 13a C1702 − 14
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
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
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 Dec. 15, 2013July 15, 2014. Published February 2014August 2014. Originally approved in 2009. Last previous edition approved in 2013 as
C1702–13.–13a. DOI: 10.1520/C1702-13A.10.1520/C1702-14.
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
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---------------------- Page: 1 ----------------------
C1702 − 14
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 ability of a material to store thermal energy 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.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.
...
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