ASTM C1827-20

Standard Test Method for Determination of the Air-Entraining Admixture Demand of a Cementitious Mixture

SIGNIFICANCE AND USE
5.1 For a specific mixture of cementitious material and AEA solution, the foam index or the absolute volume of AEA determined by this test method provides a measure of effectiveness in producing a stable air-void system for that specific mixture. Values of foam index can be compared only if the AEA solutions used in each test have the same concentration of AEA, the same type of AEA is used, and the same cementitious materials are used. Values of absolute volume of AEA can be compared only if the AEA solutions used in each test are prepared using the same AEA type.  
5.2 The foam index or the absolute volume of AEA of a cementitious mixture can be expressed as an absolute value, or as a ratio with the foam index or the absolute volume of AEA, respectively, obtained using a slurry of only portland cement and water.  
5.3 When successive foam index or absolute volume of AEA test results are compared, changes can be detected in the effectiveness of the AEA with a specific mixture of cementitious material in producing concrete with a suitable entrained air-void system.  
5.4 The foam index and the absolute volume of AEA are not a quantitative measure of AEA dosage for a concrete mixture.
SCOPE
1.1 This test method is for the determination of the air-entraining admixture (AEA) demand of a mixture of cementitious materials, AEA, and water.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2  
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.

General Information

• Status: Published
• Publication Date: 14-Feb-2020
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.48 - Performance of Cementitious Materials and Admixture Combinations

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: C1827 − 20
Standard Test Method for
Determination of the Air-Entraining Admixture Demand of a
1
Cementitious Mixture
This standard is issued under the fixed designation C1827; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 For definitions of terms used in this test method, refer
to Terminology C125.
1.1 This test method is for the determination of the air-
3.2 Definitions of Terms Specific to This Standard:
entraining admixture (AEA) demand of a mixture of cementi-
3.2.1 absolute volume of AEA, n—the air-entraining admix-
tious materials, AEA, and water.
ture demand expressed as volume of un-diluted air-entraining
1.2 The values stated in SI units are to be regarded as
admixture to produce a stable foam.
standard. No other units of measurement are included in this
3.2.2 air-entraining admixture demand, n—the quantity of
standard.
air-entraining admixture required to produce a stable foam for
1.3 This standard does not purport to address all of the
a specific mixture of cementitious materials, air-entraining
safety concerns, if any, associated with its use. It is the
admixture, and water.
responsibility of the user of this standard to establish appro-
3.2.3 foam index, n—the air-entraining admixture demand
priate safety, health, and environmental practices and deter-
expressed as the number of drops of a dilute solution of
mine the applicability of regulatory limitations prior to use.
air-entraining admixture required to produce a stable foam.
Warning—Fresh hydraulic cementitious mixtures are caustic
3.2.3.1 Discussion—For a given combination of materials,
and may cause chemical burns to skin and tissue upon
the number of drops required to produce a stable foam will
2
prolonged exposure.
depend on the concentration of the AEA solution that is used.
1.4 This international standard was developed in accor-
3.2.4 slurry concentration, n—the concentration in percent
dance with internationally recognized principles on standard-
volume of air-entraining admixture in the liquid portion of the
ization established in the Decision on Principles for the
slurry of combined cement, test material, and AEA solution.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3.2.5 solution concentration, n—the concentration in per-
Barriers to Trade (TBT) Committee.
centvolumeofair-entrainingadmixtureinanaqueoussolution
that is prepared and added to the test sample dropwise.
2. Referenced Documents
3.2.6 stable foam, n—a continuous foam layer that covers
3
2.1 ASTM Standards:
the entire surface at the air/liquid interface of a mixture of
C114Test Methods for Chemical Analysis of Hydraulic
cementitiousmaterials,air-entrainingadmixture,andwaterand
Cement
maintains that coverage for a specified duration.
C125Terminology Relating to Concrete and Concrete Ag-
4. Summary of Test Method
gregates
4.1 The cementitious material or combination of materials
3. Terminology
to be tested is combined with water and a dilute solution of
AEA that is added one drop at a time (dropwise), and the
3.1 Definitions:
mixtureisagitatedforafixedperiodoftimetoproduceafoam.
The stability of the foam is observed. If the foam is not stable,
1
This test method is under the jurisdiction of ASTM Committee C09 on additional AEA solution is added dropwise and the agitation
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
and observation is repeated. The combined cycle of AEA
C09.48 on Performance of Cementitious Materials and Admixture Combinations.
addition, agitation, and observation is repeated until a stable
Current edition approved Feb. 15, 2020. Published April 2020. DOI: 10.1520/
foam is observed. The number of drops required to achieve a
C1827-20.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM
stable foam is recorded as the foam index.
Standards, Vol. 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5. Significance and Use
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.1 ForaspecificmixtureofcementitiousmaterialandAEA
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. solution, the foam index or the absolute volume of AEA
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

-----------------
...