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: C942/C942M - 21 INTERNATIONAL Standard Test Method for Compressive Strength of Grouts for Preplaced-Aggregate Concrete in the Laboratoryl This standard is issued under the fixed designation C942/C942M; 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 (e) 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* C109/C109M Test Method for Compressive Strength of 1.1 This test method covers the determination of the com- Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube pressive strength of hydraulic cement grout for preplaced- Specimens) C125 Terminology Relating to Concrete and Concrete Ag- aggregate (PA) concrete. gregates 1.2 The values stated in either SI units or inch-pound units C219 Terminology Relating to Hydraulic and Other Inor- are to be regarded separately as standard. The values stated in ganic Cements each system are not necessarily exact equivalents; therefore, to C937 Specification for Grout Fluidifier for Preplaced- ensure conformance with the standard, each system shall be Aggregate Concrete used independently of the other, and values from the two C938 Practice for Proportioning Grout Mixtures for systems shall not be combined. Preplaced-Aggregate Concrete 1.3 This standard does not purport to address all of the C939 Test Method for Flow of Grout for Preplaced- safety concerns, if any, associated with its use. It is the Aggregate Concrete (Flow Cone Method) responsibility of the user of this standard to establish appro- C1437 Test Method for Flow of Hydraulic Cement Mortar priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. 3. Terminology Warning-Fresh hydraulic cementitious mixtures are caustic 3.1 Definitions: and may cause chemical burns to skin and tissue upon 3.1.1 For definitions of terms used in this testmethod,refer prolonged exposure.2 to Terminologies C125 and C219. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- 4. Summary of Test Method ization established in the Decision on Principles for the 4.1 Compressive strength of hardened grout is determined DevelopmentofInternational Standards,Guides andRecom- using top-restrained cubes as defined in Test Method C109/ mendations issued by the World Trade Organization Technical C109M. Barriers to Trade (TBT) Committee. 5. Significance and Use 2. Referenced Documents 5.1 This test method affords a means for determining the 2.1 ASTM Standards.3 C31/C31M Practice for Making and Curing Concrete Test compressive strength of grouts that expand and, in use, harden under conditions of partial to total restraint. Specimens in the Field 5.2 It is particularly applicable for determining the effect on compressive strength of grout fluidifier to be used with grout This test method is under the jurisdiction of ASTM Committee Co9 on forPAconcrete(See SpecificationC937). Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.41 on Hydraulic Cement Grouts. 6. Apparatus approved in 1981. Last previous edition approved in 2015 as C942-15. DOI: 6.1 Scales, masses, sieves, glass graduates, and three-gang 10.1520/C0942-21 2 Section on Safety Precautions, Manual of Aggregate and Concrete Testing molds, for 50 mm [2 in.] cube specimens, baseplates, trowel, Annual Book of ASTM Standards, Vol. 04.02.