1、Designation:C109/C109M11a Designation: C109/C109M 11bStandard 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 ori
2、ginal 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 Department of D
3、efense.1. Scope*1.1 This test method covers determination of the compressive strength of hydraulic cement mortars, using 2-in. or 50-mm cubespecimens.NOTE 1Test Method C349 provides an alternative procedure for this determination (not to be used for acceptance tests).1.2 This test method covers the
4、application of the test using either inch-pound or SI units. The values stated in either SI unitsor inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values statedin each system may not be exact equivalents; therefore, each system sh
5、all be used independently of the other. Combining valuesfrom the two systems may result in nonconformance with the standard.1.3 Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversionand Rounding given in Standard IEEE/ASTM SI-10,
6、of measurements made in other units.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimita
7、tions prior to use. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin andtissue upon prolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C91 Specification for Masonry CementC114 Test Methods for Chemical Analysis of Hydraulic CementC150 Specif
8、ication for Portland CementC230/C230M Specification for Flow Table for Use in Tests of Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic ConsistencyC349 Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Brok
9、en in Flexure)C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing ofHydraulic Cements and ConcretesC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in ConcreteC67
10、0 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsC778 Specification for SandC989 Specification for Slag Cement for Use in Concrete and MortarsC1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical
11、Testing ofHydraulic CementsC1157 Performance Specification for Hydraulic CementC1328 Specification for Plastic (Stucco) CementC1329 Specification for Mortar CementC1437 Test Method for Flow of Hydraulic Cement Mortar1This test method is under the jurisdiction of ASTM Committee C01 on Cement and is t
12、he direct responsibility of Subcommittee C01.27 on Strength .Current edition approved Oct.Dec. 1, 2011. Published November 2011.March 2012. Originally approved in 1934. Last previous edition approved in 2011 asC109/C109M 11a. DOI: 10.1520/C0109_C0109M-11AB.2See the section on Safety, Manual of Cemen
13、t Testing, Annual Book of ASTM Standards, Vol 04.01.3For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This docu
14、ment is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as
15、appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Unite
16、d States.E4 Practices for Force Verification of Testing MachinesIEEE/ASTM SI-10 Standard for Use of the International System of Units (SI): The Modern Metric System3. Summary of Test Method3.1 The mortar used consists of 1 part cement and 2.75 parts of sand proportioned by mass. Portland or air-entr
17、aining portlandcements are mixed at specified water/cement ratios. Water content for other cements is that sufficient to obtain a flow of 110 65 in 25 drops of the flow table. Two-inch or 50-mm test cubes are compacted by tamping in two layers. The cubes are cured oneday in the molds and stripped an
18、d immersed in lime water until tested.4. Significance and Use4.1 This test method provides a means of determining the compressive strength of hydraulic cement and other mortars andresults may be used to determine compliance with specifications. Further, this test method is referenced by numerous oth
19、erspecifications and test methods. Caution must be exercised in using the results of this test method to predict the strength ofconcretes.5. Apparatus5.1 Weights and Weighing Devices, shall conform to the requirements of Specification C1005. The weighing device shall beevaluated for precision and ac
20、curacy at a total load of 2000 g.5.2 Glass Graduates, of suitable capacities (preferably large enough to measure the mixing water in a single operation) todeliver the indicated volume at 20 C. The permissible variation shall be 62 mL. These graduates shall be subdivided to at least5 mL, except that
21、the graduation lines may be omitted for the lowest 10 mL for a 250-mL graduate and for the lowest 25 mL ofa 500-mL graduate. The main graduation lines shall be circles and shall be numbered. The least graduations shall extend at leastone seventh of the way around, and intermediate graduations shall
22、extend at least one fifth of the way around.5.3 Specimen Molds, for the 2-in. or 50-mm cube specimens shall be tight fitting. The molds shall have not more than threecube compartments and shall be separable into not more than two parts. The parts of the molds when assembled shall be positivelyheld t
23、ogether. The molds shall be made of hard metal not attacked by the cement mortar. For new molds the Rockwell hardnessnumber of the metal shall be not less than 55 HRB. The sides of the molds shall be sufficiently rigid to prevent spreading orwarping. The interior faces of the molds shall be plane su
24、rfaces and shall conform to the tolerances of Table 1.5.3.1Cube5.3.1 Cube molds shall be checked for conformance to the design and dimensional requirements of this test methodat least every 2 years.5.4 Mixer, Bowl and Paddle, an electrically driven mechanical mixer of the type equipped with paddle a
25、nd mixing bowl, asspecified in Practice C305.5.5 Flow Table and Flow Mold, conforming to the requirements of Specification C230/C230M.5.6 Tamper, a nonabsorptive, nonabrasive, nonbrittle material such as a rubber compound having a ShoreAdurometer hardnessof 80 6 10 or seasoned oak wood rendered nona
26、bsorptive by immersion for 15 min in paraffin at approximately 392 F or 200C, shall have a cross section of about12 by 1 in. or 13 by 25 mm and a convenient length of about 5 to 6 in. or 120 to 150mm. The tamping face shall be flat and at right angles to the length of the tamper.5.6.1Tampers5.6.1 Ta
27、mpers shall be checked for conformance to the design and dimensional requirements of this test methodat least every 2 years.5.7 Trowel, having a steel blade 4 to 6 in. 100 to 150 mm in length, with straight edges.5.8 Moist Cabinet or Room, conforming to the requirements of Specification C511.5.9 Tes
28、ting Machine, either the hydraulic or the screw type, with sufficient opening between the upper bearing surface and thelower bearing surface of the machine to permit the use of verifying apparatus. The load applied to the test specimen shall beindicated with an accuracy of 61.0 %. If the load applie
29、d by the compression machine is registered on a dial, the dial shall beprovided with a graduated scale that can be read to at least the nearest 0.1 % of the full scale load (Note 2). The dial shall bereadable within 1 % of the indicated load at any given load level within the loading range. In no ca
30、se shall the loading range ofa dial be considered to include loads below the value that is 100 times the smallest change of load that can be read on the scale.The scale shall be provided with a graduation line equal to zero and so numbered. The dial pointer shall be of sufficient length toTABLE 1 Pe
31、rmissible Variations of Specimen Molds2-in. Cube Molds 50-mm Cube MoldsParameter New In Use New In UsePlaneness of sides ,1,1)9 or equiva-lent, or use statistical tables to find the confidence in aone-tailed, paired-value t-test on the set of round errors.NOTEThe qualification method fails for bias if (1) the MREr exceedsthe MAREr, % limit; or if (2) the GRE, % exceeds the MGREg limit andthe CL, % exceeds 95 %.C109/C109M 11b12
