1、Designation: C109/C109M 16aStandard Test Method forCompressive Strength of Hydraulic Cement Mortars (Using2-in. or 50-mm Cube Specimens)1This standard is issued under the fixed designation C109/C109M; the number immediately following the designation indicates the yearof original adoption or, in the
2、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 T
3、his test method covers determination of the compres-sive strength of hydraulic cement mortars, using 2-in. or50-mm cube specimens.NOTE 1Test Method C349 provides an alternative procedure for thisdetermination (not to be used for acceptance tests).1.2 This test method covers the application of the te
4、st usingeither inch-pound or SI units. The values stated in either SIunits or inch-pound units are to be regarded separately 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 independentl
5、y 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 inSI units or by appropriate conversion, using the Rules forConversion and Rounding given in IEEE/ASTM SI-10, ofmeasurements made in other unit
6、s.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility 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. (WarningFres
7、hhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C91 Specification for Masonry CementC114 Test Methods for Chemical Analysis of HydraulicCementC150 Specification for Portland CementC230/C2
8、30M Specification for Flow Table for Use in Testsof Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC349 Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken inFlexure)C511 Specification for
9、Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC670 Practice for Preparing Precision and
10、Bias Statementsfor Test Methods for Construction MaterialsC778 Specification for Standard SandC989 Specification for Slag Cement for Use in Concrete andMortarsC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1157
11、Performance Specification for Hydraulic CementC1328 Specification for Plastic (Stucco) CementC1329 Specification for Mortar CementC1437 Test Method for Flow of Hydraulic Cement MortarE4 Practices for Force Verification of Testing Machines2.2 IEEE/ASTM Standard:3IEEE/ASTM SI-10 Standard for Use of th
12、e InternationalSystem of Units (SI): The Modern Metric System3. Summary of Test Method3.1 The mortar used consists of 1 part cement and 2.75 partsof sand proportioned by mass. Portland or air-entrainingportland cements are mixed at specified water/cement ratios.Water content for other cements is tha
13、t sufficient to obtain aflow of 110 6 5 in 25 drops of the flow table. Two-inch or50-mm test cubes are compacted by tamping in two layers.1This test method is under the jurisdiction ofASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.27 on Strength.Current edition appr
14、oved March 1, 2016. Published April 2016. Originallyapproved in 1934. Last previous edition approved in 2016 as C109/C109M 16.DOI: 10.1520/C0109_C0109M-16A.2See the section on Safety, Manual of Cement Testing, Annual Book of ASTMStandards, Vol 04.01.3For referenced ASTM standards, visit the ASTM web
15、site, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor
16、Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1The cubes are cured one day in the molds and stripped andimmersed in lime water until tested.4. Significance and Use4.1 This test method provides a means of determining thecompressive strength of hydraulic cement and other mortarsan
17、d results may be used to determine compliance with speci-fications. Further, this test method is referenced by numerousother specifications and test methods. Caution must be exer-cised in using the results of this test method to predict thestrength of concretes.5. Apparatus5.1 Weights and Weighing D
18、evices, shall conform to therequirements of Specification C1005. The weighing deviceshall be evaluated for precision and accuracy at a total load of2000 g.5.2 Glass Graduates, of suitable capacities (preferably largeenough to measure the mixing water in a single operation) todeliver the indicated vo
19、lume at 20C.The permissible variationshall be 62 mL. These graduates shall be subdivided to at least5 mL, except that the graduation lines may be omitted for thelowest 10 mL for a 250-mL graduate and for the lowest 25 mLof a 500-mL graduate. The main graduation lines shall becircles and shall be num
20、bered. The least graduations shallextend at least one seventh of the way around, and intermediategraduations shall extend at least one fifth of the way around.5.3 Specimen Molds, for the 2-in. or 50-mm cube speci-mens shall be tight fitting. The molds shall have not more thanthree cube compartments
21、and shall be separable into not morethan two parts. The parts of the molds when assembled shall bepositively held together.The molds shall be made of hard metalnot attacked by the cement mortar. For new molds theRockwell hardness number of the metal shall be not less than55 HRB. The sides of the mol
22、ds shall be sufficiently rigid toprevent spreading or warping. The interior faces of the moldsshall be plane surfaces and shall conform to the tolerances ofTable 1.5.3.1 Cube molds shall be checked for conformance to thedesign and dimensional requirements of this test method atleast every 2 years.5.
23、4 Mixer, Bowl and Paddle, an electrically driven mechani-cal mixer of the type equipped with paddle and mixing bowl,as specified in Practice C305.5.5 Flow Table and Flow Mold, conforming to the require-ments of Specification C230/C230M.5.6 Tamper, a nonabsorptive, nonabrasive, nonbrittle mate-rial s
24、uch as a rubber compound having a Shore A durometerhardness of 80 6 10 or seasoned oak wood rendered nonab-sorptive by immersion for 15 min in paraffin at approximately392F or 200C, shall have a cross section of 0.5 (60.06) by1-in (60.06) 13 (61.6) by 25 (61.6) mm and a length of 5 to6 in. or 120 to
25、 150 mm. The tamping face shall be flat and atright angles to the length of the tamper.5.6.1 Tampers shall be checked for conformance to thedesign and dimensional requirements of this test method atleast every six months.NOTE 2Each day that the tamper is used a visual inspection shouldconfirm that t
26、he end is flat and at a right angle to the long axis of thetamper. Rounded or peeling tampers should not be allowed for use.5.7 Trowel, having a steel blade 4 to 6 in. 100 to 150 mmin length, with straight edges.5.8 Moist Cabinet or Room, conforming to the require-ments of Specification C511.5.9 Tes
27、ting Machine, either the hydraulic or the screw type,with sufficient opening between the upper bearing surface andthe lower bearing surface of the machine to permit the use ofverifying apparatus. The load applied to the test specimen shallbe indicated with an accuracy of 61.0 %. If the load applied
28、bythe compression machine is registered on a dial, the dial shallbe provided with a graduated scale that can be read to at leastthe nearest 0.1 % of the full scale load (Note 3). The dial shallbe readable within 1 % of the indicated load at any given loadlevel within the loading range. In no case sh
29、all the loadingrange of a dial be considered to include loads below the valuethat is 100 times the smallest change of load that can be readon the scale. The scale shall be provided with a graduation lineequal to zero and so numbered. The dial pointer shall be ofsufficient length to reach the graduat
30、ion marks; the width of theend of the pointer shall not exceed the clear distance betweenthe smallest graduations. Each dial shall be equipped with azero adjustment that is easily accessible from the outside of thedial case, and with a suitable device that at all times until reset,will indicate to w
31、ithin 1 % accuracy the maximum load appliedto the specimen.5.9.1 If the testing machine load is indicated in digital form,the numerical display must be large enough to be easily read.The numerical increment must be equal to or less than 0.10 %of the full scale load of a given loading range. In no ca
32、se shallthe verified loading range include loads less than the minimumnumerical increment multiplied by 100. The accuracy of theindicated load must be within 1.0 % for any value displayedTABLE 1 Permissible Variations of Specimen Molds2-in. Cube Molds 50-mm Cube MoldsParameter New In Use New In UseP
33、laneness of sides ,1,1)9 orequivalent, or use statistical tables to find the confidence ina one-tailed, paired-value t-test on the set of round errors.NOTE 1The qualification method fails for bias if (1) the MRErexceeds the MAREr, % limit; or if (2) the GRE, % exceeds the MGREglimit and the CL, % exceeds 95 %.C109/C109M 16a10
