ASTM C 109 Compressive Strength of Hydraulic Cement Mortars

Designation:C109/C109M–02

Standard Test Method for

Compressive Strength of Hydraulic Cement Mortars

(Using2-in.or[50-mm]Cube Specimens)1

This standard is issued under thefixed designation C109/C109M;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 Department of Defense.

1.Scope*

1.1This test method covers determination of the compres-sive strength of hydraulic cement mortars,using2-in.or [50-mm]cube specimens.

N OTE1—Test Method C349provides an alternative procedure for this determination(not to be used for acceptance tests).

1.2This test method covers the application of the test using either inch-pound or SI units.The values stated in either system shall be regarded separately as standard.Within the text,the SI units are shown in brackets.The values stated in each system are not exact equivalents;therefore,each system shall be used independently of the bining values from the two systems may result in nonconformance with the specification.

1.3Values in SI units shall be obtained by measurement in SI units or by appropriate conversion,using the Rules for Conversion and Rounding given in Standard IEEE/ASTM SI 10,of measurements made in other units.

1.4This 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 appro-priate safety and health practices and determine the applica-bility 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)

2.Referenced Documents

2.1ASTM Standards:

C230Specification for Flow Table for Use in Tests of Hydraulic Cement3

C305Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency3

C349Test Method for Compressive Strength of Hydraulic Cement Mortars(Using Portions of Prisms Broken in Flexure)3

C511Specification for Moist Cabinets,Moist Rooms and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes3

C670Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials4

C778Specification for Standard Sand3

C1005Specification for Reference Masses and Devices for Determining Mass and V olume3

C1437Test Method for Flow of Hydraulic Cement Mor-tar3

IEEE/ASTM SI10Standard for Use of the International System of Units(SI):The Modern Metric System5

3.Summary of Test Method

3.1The mortar used consists of1part cement and2.75parts of sand proportioned by mass.Portland or air-entraining portland cements are mixed at specified water/cement ratios. Water content for other cements is that sufficient to obtain a flow of11065in25drops of theflow table.Two-inch or [50-mm]test cubes are compacted by tamping in two layers. The cubes are cured one day in the molds and stripped and immersed in lime water until tested.

4.Significance and Use

4.1This test method provides a means of determining the compressive strength of hydraulic cement and other mortars and results may be used to determine compliance with speci-fications.Further,this test method is referenced by numerous other specifications and test methods.Caution must be exer-cised in using the results of this test method to predict the strength of concretes.

5.Apparatus

5.1Weights and Weighing Devices,shall conform to the requirements of Specification C1005.The weighing device shall be evaluated for precision and bias at a total load of2000 g.

5.2Glass Graduates,of suitable capacities(preferably large enough to measure the mixing water in a single operation)to

1This test method is under the jurisdiction of ASTM Committee C01on Cement and is the direct responsibility of Subcommittee C01.27on Strength.

Current edition approved June10,2002.Published August2002.Originally published as C109–st previous edition C109/C109M–01.

2See the section on Safety,Manual of Cement Testing,Annual Book of ASTM

Standards,V ol04.01.

3Annual Book of ASTM Standards,V ol04.01.

4Annual Book of ASTM Standards,V ol04.02.

5Annual Book of ASTM Standards,V ol14.04. 1

*A Summary of Changes section appears at the end of this standard. Copyright©ASTM International,100Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.

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