ASTM C1073-18(2023)

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: C1073 − 18 (Reapproved 2023)
Standard Test Method for
Hydraulic Activity of Slag Cement by Reaction with Alkali
This standard is issued under the fixed designation C1073; 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* C219 Terminology Relating to Hydraulic and Other Inor-
ganic Cements
1.1 This test method covers the rapid determination of
C305 Practice for Mechanical Mixing of Hydraulic Cement
hydraulic activity of slag cement. This test method measures
Pastes and Mortars of Plastic Consistency
the accelerated strength development of the slag cement by
C670 Practice for Preparing Precision and Bias Statements
using sodium hydroxide solution as mixing water and curing at
for Test Methods for Construction Materials
elevated temperature.
C778 Specification for Standard Sand
1.2 The values stated in SI units are to be regarded as
C989/C989M Specification for Slag Cement for Use in
standard. No other units of measurement are included in this
Concrete and Mortars
standard.
1.3 The text of this standard references notes and footnotes 3. Terminology
which provide explanatory information. These notes and foot-
3.1 Definitions:
notes (excluding those in tables) shall not be considered as
3.1.1 Definitions are given in Terminology C125 and C219.
requirements of this standard.
3.2 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.2.1 slag, n—granulated blast-furnace slag as defined in
safety concerns, if any, associated with its use. It is the
Terminology C125 and ground to cement fineness.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use. A
4.1 This test method can be used as a quality-control test for
specific warning statement is given in Section 6.
slag production from a single source after adequate correlation
1.5 This international standard was developed in accor-
with tests stipulated in Specification C989/C989M.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.2 This test method may be used as an evaluation technique
Development of International Standards, Guides and Recom-
for slag cement, when an appropriate correlation with various
mendations issued by the World Trade Organization Technical
finenesses of slag cements from a specific source ground in a
Barriers to Trade (TBT) Committee.
specific laboratory mill has been previously developed.
4.3 The hydraulic activity as measured by this test method
2. Referenced Documents
on slag cement samples can provide guidance to a manufac-
2.1 ASTM Standards:
turer as to fineness level required to maintain a certain level of
C109/C109M Test Method for Compressive Strength of
hydraulic activity.
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
4.4 While this test method is intended primarily as a quality
Specimens)
control test, some studies have shown that the test method is
C125 Terminology Relating to Concrete and Concrete Ag-
capable of evaluating the hydraulic activity of slag cements
gregates
from different sources.
This test method is under the jurisdiction of ASTM Committee C09 on 5. Apparatus
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
5.1 Three-Gang Molds for 2-in. or 50-mm Cubes and
C09.27 on Slag Cement.
Current edition approved Oct. 1, 2023. Published October 2023. Originally
Compression Test Machine, as specified in Test Method C109/
approved in 1985. Last previous edition approved in 2018 as C1073 – 18. DOI:
C109M (Note 1).
10.1520/C1073-18R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—Silicone grease is recommended for protection of mold
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
surfaces from the caustic solution in this test.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.2 Mixer, as specified in Method C305.
*A Summary of Changes section appears at the end of this standard
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C1073 − 18 (2023)
5.3 Curing Chamber, capable of maintaining a temperature from the curing chamber and examine each container for leaks.
of air or water bath of 55°C 6 2 °C. If more than 15 mL of water has escaped or more than 5 mL of
water has entered, discard the specimens and retest. Remove
5.4 Containers, capable of holding one three-cube mold in
the specimens from the mold and store in room air until tested.
an essentially vapor-tight condition. If polyethylene or other
plastic bags are used, they shall have a closure of the zip type. 7.4 Determination of Compressive Strength—Test the speci-
If rigid containers are used, they shall have tight sealing covers mens for compressive strength at 24 6 ⁄2 h in accordance with
(Note 2). The acceptability of containers shall be determined Test Method C109/C109M.
by measuring the water loss after curing in air or the gain after
8. Calculation
curing in water bath. Water loss shall be less than 15 mL in a
...