ASTM C937-23

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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: C937 − 16 C937 − 23
Standard Specification for
Grout Fluidifier for Preplaced-Aggregate Concrete
This standard is issued under the fixed designation C937; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers fluidifier for grout used for preplaced-aggregate (PA) concrete.
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 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding
those in tables and figures) shall not be considered as requirements of the standard.
1.4 The following precautionary caveat pertains only to the test method portion, Section 8, of this standard: 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 healthsafety, 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 exposed
skin and tissue upon prolonged exposure. )
1.5 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
2.1 ASTM Standards:
C33/C33M Specification for Concrete Aggregates
C125 Terminology Relating to Concrete and Concrete Aggregates
C150/C150M Specification for Portland Cement
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C618 Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C637 Specification for Aggregates for Radiation-Shielding Concrete
C938 Practice for Proportioning Grout Mixtures for Preplaced-Aggregate Concrete
C939/C939M Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method)
C940 Test Method for Expansion and Bleeding of Freshly Mixed Grouts for Preplaced-Aggregate Concrete in the Laboratory
C941 Test Method for Water Retentivity of Grout Mixtures for Preplaced-Aggregate Concrete in the Laboratory
C942C942/C942M Test Method for Compressive Strength of Grouts for Preplaced-Aggregate Concrete in the Laboratory
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.41 on
Hydraulic Cement Grouts.
Current edition approved Feb. 1, 2016June 15, 2023. Published March 2016July 2023. Originally approved in 1980. Last previous edition approved in 20102016 as
C937C937 – 16.–10. DOI: 10.1520/C0937-16.10.1520/C0937-23.
See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol. 04.02.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C937 − 23
C953 Test Method for Time of Setting of Grouts for Preplaced-Aggregate Concrete in the Laboratory
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminologies C125 and C219.
4. Ordering Information
4.1 The purchaser shall specify the material desired as “grout fluidifier for preplaced-aggregate concrete.” The material shall meet
the requirements of this specification.
5. Materials
5.1 Grout ingredients shall conform to the following requirements:
5.1.1 Portland cement shall meet the requirements of Specification C150/C150M for the type to be used.
5.1.2 Pozzolan shall meet the requirements of Specification C618.
5.1.3 Fine aggregate shall meet the requirements of Specification C33/C33M except that grading shall conform to Specification
C637, Table number 2, Grading 1 for Fine Aggregate.
6. Physical Requirements
6.1 The fluidifier, when tested in grout as specified herein, shall conform to the requirements of Table 1.
7. Sampling
7.1 The test sample of fluidifier shall have a mass of at least 225 g and shall be representative of the material supplied. If feasible,
the test sample shall be composited from grab samples taken from not fewer than four packages selected at random.
8. Test Methods
8.1 Summary of Method—Physical properties of grout containing fluidifier are determined and compared with corresponding
properties of grout made without fluidifier.
8.2 Significance and Use—The effects of adding fluidifier to a standard grout mixture are determined in order to evaluate its ability
to reduce mixing water, prevent early stiffening, hold solid constituents in suspension, produce controlled expansion prior to initial
setting, and maintain or increase compressive strength.
8.3 Procedure:
8.3.1 Have all grout materials including mixing water at 23.0 6 2.0°C23.0 °C 6 2.0 °C at the start of the test.
8.3.2 Maintain the laboratory and curing room at 23.0 6 2.0°C23.0 °C 6 2.0 °C at all times during testing.
8.3.3 Grout Preparation:
8.3.3.1 Proportion two grout mixtures, one a control mixture without and one a test mixture with the grout fluidifier under
consideration, each containing equal parts, by mass, of cementitious material and fine aggregate, with sufficient water to produce
a grout efflux time
...