C109/C109M – 20a Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using2-in.”or [5o-mm] Cube Specimens)

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Designation: C109/C109M - 20a Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using2-in."or [5o-mm] Cube Specimens)11. Scope@1.1 This test method covers determination of the compres-sive strength of hydraulic cement mortars，using 2-in. or[50-mm] cube specimens.NonE 1——Test Method C349 provides an altermative procedure for thisdetermination (not to be usod for acceptanoe tcsts).1.2 This test method covers the application of the test usingeither inch-pound or Sl units. The values staed in either SIunits or inch-pound units are to be regarded separatcly asstandard. Within the text, the SI units are shown in brackets.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.1.3 Values in SI units shall be obtained by measurement inSl units or by approprialte conversion, using the Rules forConversion and Rounding given in lEEE/ASTM SI-10.ofmeasurements made in other units.1.4 This sianrdard does nor puarport to address all of thesafety concernas.if any. associcted wirhirs use.It is rhere sponsibility of the us

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