1、Designation: C 513 11Standard Test Method forObtaining and Testing Specimens of Hardened LightweightInsulating Concrete for Compressive Strength1This standard is issued under the fixed designation C 513; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. Scope1.1 This
3、 test method covers obtaining, preparing, and test-ing specimens of hardened, lightweight, insulating concretemade with either lightweight aggregate conforming to Speci-fication C332 or using preformed foam made from a foamingagent conforming to Specification C869 and having an oven-dry density not
4、exceeding 800 kg/m350 lb/ft3.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may r
5、esult in non-conformancewith the standard.1.3 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 regulator
6、y limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C39/C39M Test Method for Compressive Strength of Cy-lindrical Concrete SpecimensC88 Test Method for Soundness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC125 Terminology Relating to Concrete and Concrete Ag-gregates
7、C332 Specification for Lightweight Aggregates for Insulat-ing ConcreteC617 Practice for Capping Cylindrical Concrete SpecimensC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC869 Specification for Foaming Agents Used in MakingPreformed Foam for Cel
8、lular ConcreteC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic Cements3. Terminology3.1 Definitions3.1.1 For definitions of terms used in this test method, referto Terminology C125.4. Significance and Use4.1 This test met
9、hod is used to determine the compressivestrength of hardened lightweight insulating concrete usingsamples taken from the field. The test results can be used todetermine specification compliance when results of tests onspecimens molded at the time of construction are not availableor are defective, an
10、d to establish the strength properties ofexisting construction.5. Apparatus5.1 Masonry or Carpenters Saw, for removing a samplefrom hardened concrete and cutting cubes from the sample. Acore drill is permitted for concrete thicker than 150 mm 6 in.5.2 Testing Machine, conforming to the requirements
11、in TestMethod C39/C39M.5.3 Scales and Weights, used in weighing specimens shallconform to Specification C1005.5.4 Drying Oven, conforming to the requirements in TestMethod C88.6. Sampling6.1 Remove a sufficiently large sample, from each samplelocation, so that at least four test specimens for compre
12、ssivestrength, and one for density (unit weight), can be preparedwithout the inclusion of any concrete that has been cracked,spalled, undercut, or otherwise damaged. The sample shall beof such length and width as to permit the cubes and prisms to1This test method is under the jurisdiction of ASTM Co
13、mmittee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.21 on Lightweight Aggregates and Concrete.Current edition approved Oct. 1, 2011. Published November 2011. Originallyapproved in 1963. Last previous edition approved in 1995 as C 513 89(1995).DOI: 10.15
14、20/C051311.2For referenced ASTM standards, visit the ASTM website, 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.1Copyright ASTM International, 100 Barr Harbor Dri
15、ve, PO Box C700, West Conshohocken, PA 19428-2959, United States.be cut therefrom without approaching any edge of the samplecloser than 25 mm 1 in. Unless otherwise specified, thesample shall not be obtained until the concrete is at least 14days old. Indicate the casting direction on the sample.7. T
16、est Specimens7.1 Compressive strength specimens shall be cubes not lessthan 50 mm 2 in., nor more than 100 mm 4 in. on a side.The dimensions of the cubes shall be equal to the thickness ofthe concrete slab unless that thickness exceeds 100 mm 4 in.,in which case the depth of the specimen shall be re
17、duced to 100mm 4 in. by sawing off the lower portion as placed. Thecasting direction shall be marked on each prepared cube so thatload can be applied in the direction of casting.7.2 Specimens for density (unit weight) determination shallbe oven-dry prism-shaped specimens with a volume of at least650
18、 mL 40 in.3.8. Preparation of Test Specimens8.1 The surfaces of compressive strength specimens thatwill be in contact with the bearing surfaces of the testingmachine shall be plane within 0.5 mm 0.02 in.). Theplaneness of the bearing surfaces of the specimens shall bechecked by means of a straighted
19、ge and feeler gauge, makingmeasurements across both diagonals of the bearing faces of thecube. If the bearing surfaces depart from a plane more than 0.5mm 0.02 in., they shall be ground to within this tolerance orcapped with materials conforming to Specification C617. Thecapped surface shall be plan
20、e within 0.05 mm 0.002 in. (Note1). The surface of the specimen in contact with the lowerbearing block of the testing machine shall not depart fromperpendicularity to the axis by more than 1 (approximatelyequivalent to 0.8 mm 0.03 in. in 50 mm 2 in. or 1.7 mm0.07 in.) in 100 mm 4 in.), and the combi
21、ned departure ofthe two bearing surfaces from perpendicularity to the axis shallnot exceed 3. The difference between the longest and shortestcube edge shall not exceed 3 mm 18 in.NOTE 1These relatively low-strength materials can tolerate greaterdeviation from planeness of bearing surfaces without af
22、fecting strengththan can more rigid materials. However, if the specimen is capped, thecapped surface shall conform to the more restrictive specification.8.2 Store specimens in laboratory air until drying is initi-ated.8.3 The specimens to be tested for compressive strengthshall be dried in an oven a
23、t 60 6 3 C 140 6 5 F for 3 daysprior to testing if the insulating concrete is made usinglightweight aggregate. If the insulating concrete is made usingpreformed foam, air dry the specimens for 3 days at 23 6 2C73.5 6 3.5 F.8.4 Measure the lengths of the sides of each specimen atabout midheight to th
24、e nearest 0.25 mm 0.01 in. Determinethe average length of opposite sides and used those values tocalculate the cross-sectional area to the nearest 10 mm20.01in.2. Measure the height of the specimen along each verticaledge to the nearest 0.25 mm 0.01 in. and calculate theaverage height.8.5 The specim
25、ens for determination of density (unitweight) shall be dried in an oven at 110 6 5 C 230 6 10 Fand weighed at 24-h intervals until the loss in mass does notexceed1%ina24hperiod. Measure the mass and dimensionsof the oven-dry specimens. Calculate the density of eachspecimen in units of kg/m3lb/ft3.9.
26、 Procedure9.1 Test four specimens from a single sample location forcompressive strength in accordance with the following:9.1.1 Placing of SpecimenWipe clean the bearing faces ofthe upper and lower bearing blocks of the compression testingmachine and of the test specimen and place the test specimenon
27、 the lower bearing block. Test specimens in the direction inwhich they were cast. Align the axis of the specimen with thecenter of thrust of the spherically seated block. Tilt themoveable portion of the spherically seated block by hand sothat the bearing face appears to be parallel to the end of the
28、 testspecimen.9.1.2 Rate of LoadingApply the load continuously andwithout shock at a constant rate such that the maximum loadwill be reached in 50 6 30 s. Record the maximum loadsustained by the specimen.9.2 Calculate the compressive strength of each specimen bydividing the maximum load by the cross
29、-sectional area. Cal-culate the average compressive strength of the four specimensrepresenting the sample location, and record this averagestrength to the nearest 0.1 MPa 10 psi.10. Report10.1 Report the following for each specimen tested, whereapplicable:10.1.1 Source of sample,10.1.2 Identificatio
30、n number,10.1.3 Dimensions to nearest 0.25 mm 0.01 in.,10.1.4 Cross-sectional area to nearest 10 mm20.01 in.2,10.1.5 Type of cap, if used,10.1.6 Maximum load, kilonewtons pounds-force,10.1.7 Average compressive strength of the four specimensfrom a single sample location, to the nearest 0.1 MPa 10 ps
31、i,10.1.8 Defects in either specimen or caps,10.1.9 Age, in days, and10.1.10 Calculated oven-dry density.11. Precision and Bias11.1 Precision:11.1.1 Single Operator PrecisionThe single-operatorstandard deviation of a compressive strength test result (theaverage of four individual determinations) is g
32、iven in the firstcolumn of Table 1. The results of two properly conducted testsby the same operator on the same concrete are not expected todiffer by more than the values in the second column of Table 1.The range (difference between highest and lowest) of the fourindividual determinations obtained b
33、y the same operator arenot expected to exceed the values in column 3 of Table 1.11.1.2 Multi-Laboratory PrecisionThe multi-laboratorystandard deviation of a test result for compressive strength isgiven in the first column of Table 2. Therefore, results of twoproperly conducted tests in different lab
34、oratories on the sameconcrete are not expected to differ by more than the valuesshown in column 2 of Table 2.C513112NOTE 2The data used to develop the precision statements wereobtained in a study involving three laboratories, three materials, twooperators per laboratory, and six replicates. The prec
35、ision indices shown inSI units are exact conversions of the inch-pound values in brackets.11.2 BiasNo standard reference material is available fordetermination of the bias of this test method.ASTM International takes no position respecting the validity of any patent rights asserted in connection wit
36、h any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible techn
37、ical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considerati
38、on at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Har
39、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www
40、.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Single-Operator PrecisionStandard Deviation,MPa psiAAcceptable DifferenceBetween Two TestResults, MPa psiAAcceptable Rangefor Four IndividualDeterminations, MPa psiBIns
41、ulating concrete made with preformed foam0.28 40 0.76 110 2.00 290Insulating concrete made with lightweight aggregate0.14 20 0.41 60 1.03 150AThese numbers represent the (1s) and (d2s) limits described in Practice C670.BAcceptable range is based on Table 2 in Practice C670.TABLE 2 Multi-Laboratory P
42、recisionStandard Deviation,MPa psiAAcceptable DifferenceBetween Two TestResults, MPa psiAInsulating concrete made with preformed foam0.28 40 0.76 110Insulating concrete made with lightweight aggregate0.14 20 0.41 60AThese numbers represent the (1s) and (d2s) limits described in Practice C670.C513113
