Designation: C942 - 15 INTERNATIONAL Standard Test Method for Compressive Strength of Grouts for Preplaced-Aggregate Concrete in the Laboratory1 This standard is issued under the fixed designation C942; 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* 3.1.1 For definitions of terms used in this test method, refer 1.1 This test method covers the determination of the com- to Terminologies C125 and C219. pressive strength of hydraulic cement grout for preplaced- aggregate (PA) concrete. 4. Summary of Test Method 1.2 The values stated in SI units are to be regarded as 4.1 Compressive strength of hardened grout is determined standard. using top-restrained cubes as defined in Test Method C109/ 1.3 This standard does not purport to address all of the C109M. safety concerns, if any, associated with its use. It is the 5. Signicance and Use responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- 5.1 This test method affords a means for determining the bilityofregulatorylimitationspriortouse. compressive strengthofgroutsthatexpand and,inuse,harden 2. Referenced Documents under conditions ofpartial to total restraint. 5.2 It is particularly applicable for determining the effect on 2.1 ASTM Standards.2 compressive strengthof groutfluidifier to be used with grout C31/C31M Practice for Making and Curing Concrete Test for PA concrete (See Specification C937). Specimens in the Field C109/C109M Test Method for Compressive Strength of 6. Apparatus Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens) 6.1 Scales, masses, sieves, glass graduates, and three-gang C125 Terminology Relating to Concrete and Concrete Ag- molds, for 2-in. (or 50-mm) cube specimens, baseplates, trowel, and testing machine as specified in Test Method gregates C219 Terminology Relating to Hydraulic Cement C109/C109M C937 Specification for Grout Fluidifier for Preplaced- 6.2 Plates, to cover specimen molds, capable of supporting Aggregate Concrete the weight or being held down by C-clamps, as described in C938 Practice for Proportioning Grout Mixtures for 10.3. Preplaced-Aggregate Concrete 6.3 Mass of 7 kg (or 15 Ib) or C-clamps, for holding down C939 Test Method for Flow of Grout for Preplaced- Aggregate Concrete (Flow Cone Method) the cover plates. C1437 Test Method for Flow of Hydraulic Cement Mortar 7. Temperature and Humidity 3. Terminology 7.1 Temperature and humidity conditions for tests per- 3.1 Denitions: formed in thelaboratory shall bein accordance withTest Method C109/C109M unless otherwise specified. This test method is under the jurisdiction of ASTM Committee C09 on 7.2Temperatureand humidity conditions for tests per- C09.41 on Hydraulic Cement Grouts. formed in the field shall be as prescribed for curing cylinders ition approved Aug.1, 2015.Published October 2015.Originally inPracticeC31/C31M. approved in 1981. Last previous edition approved in 2010 as C942-10. DOI: 10.1520/C0942-15 Iced ASTM standards, visit the ASTM website 8. Sampling contact ASTM Customer Service at [email protected] AnnualBook of ASTM Standards volume information, refer to the standard's Document Summary page on 8.1 The test sample shall consist of approximately 1500 mL the ASTM website. of grout and shall be representative of the material in the mixer. *A Summary of Changes section appears at the end of this standard Copyright ASTM Intemational, 100 Bar Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 1 C942 - 15 8.2 Grout proportioned at the mixer from hydraulic ce- 11. Storage and Curing ment(s) with or without other materials shall