ASTM C1702-09a
(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
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) (4)).
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 − 09a
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. 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* 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
3.1.2 heat, n—the time integral of thermal power measured
for determining total heat of hydration of hydraulic cementi-
in joules (J).
tious materials at test ages up to 7 days by isothermal
conduction calorimetry.
3.1.3 isothermal conduction calorimeter, n—a calorimeter
thatmeasuresheatflowfromasamplemaintainedataconstant
1.2 This test method also outputs data on rate of heat of
temperature by intimate thermal contact with a constant
hydration versus time that is useful for other analytical
temperature heat sink.
purposes, as covered in Practice C1679.
3.1.4 reference cell, n—a heat-flow measuring cell that is
1.3 The values stated in SI units are to be regarded as
dedicated to measuring power from a sample that is generating
standard. No other units of measurement are included in this
no heat.
standard.
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-
3.1.5 sensitivity, n—the minimum change in thermal power
priate safety and health practices and determine the applica-
reliably detectable by an isothermal calorimeter.
bility of regulatory limitations prior to use.
3.1.5.1 Discussion—For this application, sensitivity is taken
as ten times the random noise (standard deviation) in the
2. Referenced Documents
baseline signal.
2
2.1 ASTM Standards:
3.1.6 thermal power, n—the heat production rate measured
C186 Test Method for Heat of Hydration of Hydraulic
in joules per second (J/s).
Cement
3.1.6.1 Discussion—This is the property measured by the
C670 Practice for Preparing Precision and Bias Statements
calorimeter.The thermal power unit of measure is J/s, which is
for Test Methods for Construction Materials
equivalent to the watt. The watt is also a common unit of
C1679 Practice for Measuring Hydration Kinetics of Hy-
measure used to represent thermal power.
draulic Cementitious Mixtures Using Isothermal Calorim-
etry
4. Summary of Test Method
3. Terminology
4.1 Principle—An isothermal heat conduction calorimeter
consists of a constant-temperature heat sink to which two
3.1 Definitions of Terms Specific to This Standard:
heat-flow sensors and sample holders are attached in a manner
3.1.1 baseline, n—the time-series signal from the calorim-
resulting in good thermal conductivity. One heat-flow sensor
eter when measuring output from a sample of approximately
and sample holder contains the sample of interest. The other
heat-flow sensor is a reference cell containing a blank sample
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
that evolves no heat. The heat of hydration released by the
and is the direct responsibility of Subcommittee C01.26 on Heat of Hydration.
reacting cementitious sample flows across the sensor and into
Current edition approved Dec. 1, 2009. Published January 2010. Originally
the heat sink. The output from the calorimeter is the difference
approved in 2009. Last previous edition approved in 2009 as C1702–09. DOI:
10.1520/C1702-09a.
in heat flow (thermal power) between the sample cell and the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
reference cell. The heat-flow sensor actually senses a small
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
temperature gradient that develops across the device, however
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the heat is removed from the hydrating sample fast enough
*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 − 09a
that, for practical purposes, the sample remains at a constant 6.1.3 Sample Holder—Adevice that holds the cement paste
temperature (isothermal). and provides intimate contact with the calorimet
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C1702–09 Designation:C1702–09a
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
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.
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 power, n—the heat production rate measured in joules per second (J/s).
3.1.6.1 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 conductivity. One heat-flow sensor and sample
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 July 1, 2009. Published August 2009. DOI: 10.1520/C1702-09.
Current edition approved Dec. 1, 2009. Published January 2010. Originally approved in 2009. Last previous edition approved in 2009 as C1702–09. DOI:
10.1520/C1702-09a.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
*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 ----------------------
C1702–09a
holdercontainsthesampleofinterest.Theotherheat-flowsensorisareferencecellcontainingablanksamplethatevolvesnoheat.
The heat of hydration released by the reacting cementitious sample flows across the sensor and into the heat sink.The output from
the calorimeter is the difference in heat flow (thermal power) between the sample cell and the reference cell. T
...
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