ASTM C1702-13a
(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 − 13a
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
3.1.2 heat, n—the time integral of thermal power measured
conduction calorimetry.
in joules (J).
1.2 This test method also outputs data on rate of heat of
3.1.3 isothermal conduction calorimeter, n—a calorimeter
hydration versus time that is useful for other analytical
thatmeasuresheatflowfromasamplemaintainedataconstant
purposes, as covered in Practice C1679.
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
3.1.4 reference cell, n—a heat-flow measuring cell that is
standard.
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
reliably detectable by an isothermal calorimeter.
2. Referenced Documents
3.1.5.1 Discussion—Forthisapplication,sensitivityistaken
2
2.1 ASTM Standards:
as ten times the random noise (standard deviation) in the
C186Test Method for Heat of Hydration of Hydraulic
baseline signal.
Cement
3.1.6 thermal mass, n—the ability of a material to store
C670Practice for Preparing Precision and Bias Statements
thermal energy (J/K).
for Test Methods for Construction Materials
3.1.6.1 Discussion—Thethermalmassofagivenmaterialis
C1679Practice for Measuring Hydration Kinetics of Hy-
calculatedbymultiplyingthemassbythespecificheatcapacity
draulicCementitiousMixturesUsingIsothermalCalorim-
of the material.The specific heat capacity of a typical portland
etry
cement and water is 0.75 and 4.18 J/g/K, respectively.
E691Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
3.1.7 thermal power, n—the heat production rate measured
in joules per second (J/s).
3. Terminology
3.1.7.1 Discussion—This is the property measured by the
calorimeter.ThethermalpowerunitofmeasureisJ/s,whichis
3.1 Definitions of Terms Specific to This Standard:
equivalent to the watt. The watt is also a common unit of
measure used to represent thermal power.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC01onCement
and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.
4. Summary of Test Method
Current edition approved Dec. 15, 2013. Published February 2014. Originally
4.1 Principle—An isothermal heat conduction calorimeter
approved in 2009. Last previous edition approved in 2013 as C1702–13. DOI:
10.1520/C1702-13A.
consists of a constant-temperature heat sink to which two
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
heat-flow sensors and sample holders are attached in a manner
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
resulting in good thermal conductivity. One heat-flow sensor
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and sample holder contains the sample of interest. The other
*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 − 13a
heat-flow sensor is a reference cell containing a blank sample give precision test results at specific test ages required for
that evolves no heat. The heat of hydration released by the specification compliance.
reacting cementitious sample flows across the sensor and into
the heat sink.The output from the calorimeter is the
...
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 − 13 C1702 − 13a
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 Oct. 1, 2013Dec. 15, 2013. Published October 2013February 2014. Originally approved in 2009. Last previous edition approved in 20092013
as C1702–09a.–13. DOI: 10.1520/C1702-13.10.1520/C1702-13A.
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 − 13a
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 (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. The
specific heat capacity of a typical portland cement and water is 0.75 and 4.18 J/g/K, respectively.
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 thermal power unit of measure is J/s, which is equivalent to the watt. The
watt is also a common unit of measure used to represent thermal power.
4. Summary of Test Method
4.1 Principle—An isothermal heat conduction calorimeter consists of a constant-temperature heat sink to which two heat-flow
sensors and sample holders are attached in a manner resulting in good thermal conductiv
...
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