ASTM C845/C845M-18
(Specification)Standard Specification for Expansive Hydraulic Cement
Standard Specification for Expansive Hydraulic Cement
ABSTRACT
This specification covers hydraulic cements that expand during the early hardening period after setting. The cement covered by this specification is suitable for use in shrinkage-compensating concrete and shall be designated as Type E-1. Expansive cement shall conform to the requirements as to chemical composition prescribed. Expansive cement shall conform to the physical requirements prescribed. The cement shall be sampled and the properties shall be determined with the following test methods: sampling, chemical analysis, time of setting, air content, restrained expansion of mortar, compressive strength, and density.
SCOPE
1.1 This specification covers hydraulic cements that expand during the early hardening period after setting.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:C845/C845M −18
Standard Specification for
1
Expansive Hydraulic Cement
This standard is issued under the fixed designation C845/C845M; 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 C465 Specification for Processing Additions for Use in the
Manufacture of Hydraulic Cements
1.1 This specification covers hydraulic cements that expand
C688 Specification for Functional Additions for Use in
during the early hardening period after setting.
Hydraulic Cements
1.2 The values stated in either SI units or inch-pound units
C806 Test Method for Restrained Expansion of Expansive
are to be regarded separately as standard. The values stated in
Cement Mortar
each system may not be exact equivalents; therefore, each
C807 Test Method for Time of Setting of Hydraulic Cement
system shall be used independently of the other. Combining
Mortar by Modified Vicat Needle
values from the two systems may result in non-conformance
with the standard.
3. Terminology
1.3 The text of this standard references notes and footnotes
3.1 Definitions:
which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered 3.1.1 expansive cement (K)—an expansive cement contain-
as requirements of this standard. ing anhydrous calcium aluminosulfate (4CaO·3Al O ·SO ),
2 3 3
calcium sulfate, and uncombined calcium oxide.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1.2 expansive cement (M)—an expansive cement contain-
ization established in the Decision on Principles for the
ing calcium aluminate cement and calcium sulfate.
Development of International Standards, Guides and Recom-
3.1.3 expansive cement (S)—an expansive cement contain-
mendations issued by the World Trade Organization Technical
ing tricalcium aluminate (C A) and calcium sulfate.
3
Barriers to Trade (TBT) Committee.
3.1.4 expansive hydraulic cement—a cement composed es-
2. Referenced Documents
sentiallyofhydrauliccalciumsilicates,calciumaluminatesand
2
2.1 ASTM Standards:
calcium sulfates, which, upon being mixed with water, forms a
C33/C33M Specification for Concrete Aggregates
paste that increases significantly in volume during the early
C109/C109M Test Method for Compressive Strength of
hardening period occurring after setting. This volume increase
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
is due principally to the reaction of the calcium aluminates and
Specimens)
calcium sulfates.
C114 Test Methods for Chemical Analysis of Hydraulic
3.1.5 shrinkage-compensating concrete—concrete that is in-
Cement
ternally restrained with resilient reinforcing and made with
C183/C183M Practice for Sampling and the Amount of
expansivecementwhichinducesbothcompressivestressinthe
Testing of Hydraulic Cement
concrete and positive steel strain that approximately off-sets
C185 Test Method for Air Content of Hydraulic Cement
tensile stresses and negative strains induced by drying shrink-
Mortar
age.
C188 Test Method for Density of Hydraulic Cement
4. Classification
1
This specification is under the jurisdiction of ASTM Committee C01 on
Cement and is the direct responsibility of Subcommittee C01.13 on Special 4.1 The cement covered by this specification is suitable for
Cements.
use in shrinkage-compensating concrete and shall be desig-
Current edition approved July 1, 2018. Published July 2018. Originally approved
nated as Type E-1.
in 1976. Last previous edition approved in 2012 as C845 – 12. DOI: 10.1520/C0845
_C0845M-18.
2 NOTE1—ThreekindsofexpansivecementareidentifiedinSection3by
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the letters K, M, and S. The appropriate letter should be used as a suffix
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
to the type designation when one of these kinds is desired. Expansive
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cement may also be prepared in other ways.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C845/C845M−18
TABLE 2 Optional Chemical Requirements
5. Ordering Information
Alkalies (Na2O + 0.658 × K2O) max, % 0.60
5.1 When it is desired that an optional requirement apply or
that the cement be of a particular kind,
...
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: C845/C845M − 12 C845/C845M − 18
Standard Specification for
1
Expansive Hydraulic Cement
This standard is issued under the fixed designation C845/C845M; 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 specification covers hydraulic cements that expand during the early hardening period after setting.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of this standard.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C33C33/C33M Specification for Concrete Aggregates
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
C183C183/C183M Practice for Sampling and the Amount of Testing of Hydraulic Cement
C185 Test Method for Air Content of Hydraulic Cement Mortar
C188 Test Method for Density of Hydraulic Cement
C465 Specification for Processing Additions for Use in the Manufacture of Hydraulic Cements
C688 Specification for Functional Additions for Use in Hydraulic Cements
C806 Test Method for Restrained Expansion of Expansive Cement Mortar
C807 Test Method for Time of Setting of Hydraulic Cement Mortar by Modified Vicat Needle
3. Terminology
3.1 Definitions:
3.1.1 expansive cement (K)—an expansive cement containing anhydrous calcium aluminosulfate (4CaO·3Al O ·SO ), calcium
2 3 3
sulfate, and uncombined calcium oxide.
3.1.2 expansive cement (M)—an expansive cement containing calcium aluminate cement and calcium sulfate.
3.1.3 expansive cement (S)—an expansive cement containing tricalcium aluminate (C A) and calcium sulfate.
3
3.1.4 expansive hydraulic cement—a cement composed essentially of hydraulic calcium silicates, calcium aluminates and
calcium sulfates, which, upon being mixed with water, forms a paste that increases significantly in volume during the early
hardening period occurring after setting. This volume increase is due principally to the reaction of the calcium aluminates and
calcium sulfates.
3.1.5 shrinkage-compensating concrete—concrete that is internally restrained with resilient reinforcing and made with
expansive cement which induces both compressive stress in the concrete and positive steel strain that approximately off-sets tensile
stresses and negative strains induced by drying shrinkage.
1
This specification is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.13 on Special Cements.
Current edition approved Dec. 15, 2012July 1, 2018. Published February 2013July 2018. Originally approved in 1976. Last previous edition approved in 20042012 as
C845 – 04.C845 – 12. DOI: 10.1520/C0845_C0845M-12.10.1520/C0845_C0845M-18.
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 ----------------------
C845/C845M − 18
4. Classification
4.1 The cement covered by this specification is suitable for use in shrinkage-compensating concrete and shall be designated as
Type E-1.
NOTE 1—Three kinds of expansive cement are identified in Section 3 by the letters K, M, and S. The appropriate letter should be used as a suffix to
the type designation when one of these kinds is desired. Expansive cement may also be prepared in o
...
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