ASTM C845/C845M-12

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.

General Information

• Status: Historical
• Publication Date: 14-Dec-2012
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.13 - Special Cements

Relations

• Replaces: ASTM C845-04 - Standard Specification for Expansive Hydraulic Cement
• Effective Date: 15-Dec-2012
• Referred By: ASTM C465-23 - Standard Specification for Processing Additions for Use in the Manufacture<brk/> of Hydraulic Cements
• Effective Date: 15-Dec-2012
• Referred By: ASTM C878/C878M-22 - Standard Test Method for Restrained Expansion of Shrinkage-Compensating Concrete
• Effective Date: 15-Dec-2012
• Referred By: ASTM C1222-23 - Standard Practice for Evaluation of Laboratories Testing Hydraulic Cement
• Effective Date: 15-Dec-2012
• Referred By: ASTM C183/C183M-23 - Standard Practice for Sampling and the Amount of Testing of Hydraulic Cement
• Effective Date: 15-Dec-2012
• Referred By: ASTM C807-21 - Standard Test Method for Time of Setting of Hydraulic Cement Mortar by Modified Vicat Needle
• Effective Date: 15-Dec-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C845/C845M −12
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 C806 Test Method for Restrained Expansion of Expansive
Cement Mortar
1.1 This specification covers hydraulic cements that expand
C807 Test Method for Time of Setting of Hydraulic Cement
during the early hardening period after setting.
Mortar by Modified Vicat Needle
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3. Terminology
each system may not be exact equivalents; therefore, each
3.1 Definitions:
system shall be used independently of the other. Combining
3.1.1 expansive cement (K)—an expansive cement contain-
values from the two systems may result in non-conformance
ing anhydrous calcium aluminosulfate (4CaO·3Al O ·SO ),
with the standard. 2 3 3
calcium sulfate, and uncombined calcium oxide.
1.3 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-
sentiallyofhydrauliccalciumsilicates,calciumaluminatesand
2. Referenced Documents
calcium sulfates, which, upon being mixed with water, forms a
2
2.1 ASTM Standards:
paste that increases significantly in volume during the early
C33 Specification for Concrete Aggregates
hardening period occurring after setting. This volume increase
C109/C109M Test Method for Compressive Strength of
is due principally to the reaction of the calcium aluminates and
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
calcium sulfates.
Specimens)
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 Practice for Sampling and the Amount of Testing of expansivecementwhichinducesbothcompressivestressinthe
Hydraulic Cement concrete and positive steel strain that approximately off-sets
tensile stresses and negative strains induced by drying shrink-
C185 Test Method for Air Content of Hydraulic Cement
Mortar age.
C188 Test Method for Density of Hydraulic Cement
C465 Specification for Processing Additions for Use in the 4. Classification
Manufacture of Hydraulic Cements
4.1 The cement covered by this specification is suitable for
C688 Specification for Functional Additions for Use in
use in shrinkage-compensating concrete and shall be desig-
Hydraulic Cements
nated as Type E-1.
NOTE1—ThreekindsofexpansivecementareidentifiedinSection3by
1
This specification is under the jurisdiction of ASTM Committee C01 on the letters K, M, and S. The appropriate letter should be used as a suffix
Cement and is the direct responsibility of Subcommittee C01.13 on Special to the type designation when one of these kinds is desired. Expansive
Cements. cement may also be prepared in other ways.
Current edition approved Dec. 15, 2012. Published February 2013. Originally
approved in 1976. Last previous edition approved in 2004 as C845 – 04. DOI:
5. Ordering Information
10.1520/C0845_C0845M-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 When it is desired that an optional requirement apply or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
that the cement be of a particular kind, a specific request to this
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. effect should be made by the purchaser.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C845/C845M−12
TABLE 2 Optional Chemical Requirements
6. Chemical Composition
Alkalies (Na2O + 0.658 × K2O) max, % 0.60
6.1 Expansive cement shall conform to the requirements as
to chemical composition prescribed in Table 1.
6.2 The purchaser has the option of specifying that the
TABLE 3 Physical Requirements
alkalies (Na O + 0.658K O) shall not exceed 0.60 % (See
2 2
Time of setting, min, minutes 75
Air conten
...

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 − 04 C845/C845M − 12
Standard Specification for
1
Expansive Hydraulic Cement
This standard is issued under the fixed designation C845;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.
2. Referenced Documents
2
2.1 ASTM Standards:
C33 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
C183 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.
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.
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 July 1, 2004Dec. 15, 2012. Published July 2004February 2013. Originally approved in 1976. Last previous edition approved in 19962004 as
C845–96.–04. DOI: 10.1520/C0845-04.10.1520/C0845-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 − 12
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 other ways.
5. Ordering Information
5.1 When it is desired that an optional requirement apply or that the cement be of a particular kind, a specific request to this
effect should be made by the purchaser.
6. Chemical Composition
6.1 Expansive cement shall conform to the requirements as to chemical composition prescribed in Table 1.
6.2 The purchaser has the option of specifying that the alkalies (Na O + 0.658K O) shall not exceed 0.60 % (See Table 2).
2 2
NOTE 2—This limit should be specified when the cement is to be used in concrete with aggregates that may be reactive. Reference
...