ASTM C563-16
(Guide)Standard Guide for Approximation of Optimum SO3 in Hydraulic Cement Using Compressive Strength
Standard Guide for Approximation of Optimum SO<inf>3</inf> in Hydraulic Cement Using Compressive Strength
SIGNIFICANCE AND USE
3.1 The purpose of this guide is to estimate the SO3 content for a hydraulic cement that gives maximum compressive strength in mortar made and cured at 23°C. The value obtained is one way to establish an appropriate level of sulfate in the manufacture of cements specified in Specifications C150, C595 and C1157.
3.2 The SO3 content of a cement giving maximum compressive strength is different at different ages of mortar; typically this SO3 content is higher at 3 days than the 24-h, and often higher for 7 days than that for 3 days. A manufacturer can choose the age of 24-h, 3 days or 7 days for specimens at which to determine optimum SO3 content.
3.3 This guide indicates optimum SO3 content for cement in mortar made and cured at a standard temperature of 23.0 ± 2.0°C (73.5 ± 3.5°F). The optimum SO3 increases with increasing temperature and may increase when water-reducing admixtures are used.
3.4 It should not be assumed that the optimum SO3 estimated in this guide is the same SO3 content for optimum performance of a concrete prepared from the cement.
3.5 The guide is applicable to cements specified in Specifications C150, C595, and C1157.
SCOPE
1.1 This guide describes the determination of approximate optimum SO3 for maximum compressive strength at 24 h, 3 days, or 7 days by measuring the change in strength produced in hydraulic cement mortar as a result of substituting calcium sulfate for a portion of the cement.
1.2 This guide refers to the sulfur trioxide (SO3) content of the cement only. Slag cements and occasionally other hydraulic cements can contain sulfide or other forms of sulfur. The determination of SO3 content by rapid methods may include these other forms, and may therefore produce a significant error. If a significant error occurs, analyze the cement for SO3 content using the reference test method of Test Methods C114 for sulfur trioxide.
1.3 Values stated as SI units are to be regarded as 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: C563 − 16
Standard Guide for
Approximation of Optimum SO in Hydraulic Cement Using
3
1
Compressive Strength
This standard is issued under the fixed designation C563; 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 Pastes and Mortars of Plastic Consistency
C471M Test Methods for ChemicalAnalysis of Gypsum and
1.1 This guide describes the determination of approximate
Gypsum Products (Metric)
optimum SO for maximum compressive strength at 24 h,
3
C511 Specification for Mixing Rooms, Moist Cabinets,
3 days,or7daysbymeasuringthechangeinstrengthproduced
Moist Rooms, and Water Storage Tanks Used in the
in hydraulic cement mortar as a result of substituting calcium
Testing of Hydraulic Cements and Concretes
sulfate for a portion of the cement.
C595 Specification for Blended Hydraulic Cements
1.2 This guide refers to the sulfur trioxide (SO ) content of
3
C1157 Performance Specification for Hydraulic Cement
thecementonly.Slagcementsandoccasionallyotherhydraulic
C1437 Test Method for Flow of Hydraulic Cement Mortar
cements can contain sulfide or other forms of sulfur. The
determination of SO content by rapid methods may include
3. Significance and Use
3
these other forms, and may therefore produce a significant
3.1 The purpose of this guide is to estimate the SO content
3
error. If a significant error occurs, analyze the cement for SO
3
for a hydraulic cement that gives maximum compressive
content using the reference test method of Test Methods C114
strength in mortar made and cured at 23°C.The value obtained
for sulfur trioxide.
is one way to establish an appropriate level of sulfate in the
1.3 Values stated as SI units are to be regarded as standard.
manufactureofcementsspecifiedinSpecificationsC150,C595
and C1157.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2 TheSO contentofacementgivingmaximumcompres-
3
responsibility of the user of this standard to establish appro-
sive strength is different at different ages of mortar; typically
priate safety and health practices and determine the applica-
this SO content is higher at 3 days than the 24-h, and often
3
bility of regulatory limitations prior to use.
higher for 7 days than that for 3 days. A manufacturer can
choosetheageof24-h,3daysor7daysforspecimensatwhich
2. Referenced Documents
to determine optimum SO content.
3
2
2.1 ASTM Standards:
3.3 This guide indicates optimum SO content for cement in
3
C109/C109M Test Method for Compressive Strength of
mortar made and cured at a standard temperature of 23.0 6
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
2.0°C (73.5 6 3.5°F). The optimum SO increases with
3
Specimens)
increasing temperature and may increase when water-reducing
C114 Test Methods for Chemical Analysis of Hydraulic
admixtures are used.
Cement
3.4 It should not be assumed that the optimum SO esti-
3
C150 Specification for Portland Cement
mated in this guide is the same SO content for optimum
3
C204 Test Methods for Fineness of Hydraulic Cement by
performance of a concrete prepared from the cement.
Air-Permeability Apparatus
C305 Practice for Mechanical Mixing of Hydraulic Cement 3.5 The guide is applicable to cements specified in Specifi-
cations C150, C595, and C1157.
4. Apparatus
1
This guide is under the jurisdiction of ASTM Committee C01 on Cement and
is the direct responsibility of Subcommittee C01.28 on Sulfate Content
4.1 Use the apparatus as specified in Test Method C109/
Current edition approved July 1, 2016. Published July 2016. Originally approved
C109M.
in 1965. Last previous edition approved in 2015 as C563 – 15. DOI: 10.1520/
C0563-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Materials
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 CalciumSulfate—Usecalciumsulfateforadditiontothe
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cement that is either a high-grade natural gypsum having an
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C563 − 16
2
SO content of at least 46 %, or the calcium sulfate from the Strength 5 a SO 1bSO 1c
~ !
3 3
3
source used for the intended plant production. Grind the
where a, b, and c are fitting coefficients.
calcium sulfate to 100 % passing the 75-µm (No. 200) sieve,
NOTE 2—Spreadsheet and graphing programs have the capability to
2
and at least 800 m /kg Blaine fineness (Test M
...
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: C563 − 15 C563 − 16
Standard Test Method Guide for
Approximation of Optimum SO in Hydraulic Cement Using
3
1
Compressive Strength
This standard is issued under the fixed designation C563; 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 describes the determination of approximate optimum SO for maximum compressive strength at 24 h, 3
3
days, or 7 days by measuring the change in strength produced in hydraulic cement mortar as a result of substituting calcium sulfate
for a portion of the cement.
1.2 This test method refers to the sulfur trioxide (SO ) content of the cement only. Slag cements and occasionally other
3
hydraulic cements can contain sulfide or other forms of sulfur. The determination of SO content by rapid methods may include
3
these other forms, and may therefore produce a significant error. If a significant error occurs, analyze the cement for SO content
3
using the reference test method of Test Methods C114 for sulfur trioxide.
1.3 Values stated as SI units are to be regarded as 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:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C114 Test Methods for Chemical Analysis of Hydraulic Cement
C150 Specification for Portland Cement
C204 Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C471M Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C595 Specification for Blended Hydraulic Cements
C778 Specification for Standard Sand
C1157 Performance Specification for Hydraulic Cement
C1437 Test Method for Flow of Hydraulic Cement Mortar
3. Significance and Use
3.1 The purpose of this test method is to estimate the SO content for a hydraulic cement that gives maximum compressive
3
strength in mortar made and cured at 23°C. The value obtained is one way to establish an appropriate level of sulfate in the
manufacture of cements specified in Specifications C150, C595 and C1157.
3.2 The SO content of a cement giving maximum compressive strength is different at different ages of mortar; typically this
3
SO content is higher at 3 days than the 24-h, and often higher for 7 days than that for 3 days. A manufacturer can choose the age
3
of 24-h, 3 days or 7 days for specimens at which to determine optimum SO content.
3
1
This test method guide is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.28 on Sulfate Content
Current edition approved Sept. 1, 2015July 1, 2016. Published October 2015July 2016. Originally approved in 1965. Last previous edition approved in 20132015 as
C563 – 13.C563 – 15. DOI: 10.1520/C0563-15.10.1520/C0563-16.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C563 − 16
3.3 This test method indicates optimum SO content for cement in mortar made and cured at a standard temperature of 23.0 6
3
2.0°C (73.5 6 3.5°F). The optimum SO increases with increasing temperature and may increase when water-reducing admixtures
3
are used.
3.4 It should not be assumed that the optimum SO estimated in this test method is the same SO content for optimum
3 3
performance of a concrete prepared from the cement.
3.5 The test method is applicable to cements specified in Specifications C150, C595, and C1157.
4. Apparatus
4.1 Use the apparatus as specified in Test Method C109/C109M.
5. Materials
5.1 C
...
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