1、Designation: C332 17Standard Specification forLightweight Aggregates for Insulating Concrete1This standard is issued under the fixed designation C332; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num
2、ber 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 U.S. Department of Defense.1. Scope*1.1 This specification covers lightweight aggregates in
3、-tended for use in concrete not exposed to the weather, in whichthe prime consideration is the thermal insulating property ofthe resulting concrete.1.2 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and
4、figures) shall not be consideredas requirements of the standard.1.3 With regard to sieve size and the size of aggregate asdetermined by the use of testing sieves, the values in inch-pound units are shown for the convenience of the user;however, the standard sieve designation shown in parenthesesis t
5、he standard value as stated in Specification E11.1.3.1 With regard to other units of measure, the valuesstated in inch-pound units are to be regarded as standard. Thevalues given in parentheses are mathematical conversions to SIunits that are provided for information only and are notconsidered stand
6、ard.1.4 The following precautionary caveat pertains only to thetest method portion, Section 7, of the specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safe
7、ty and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Sta
8、ndards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density (“Unit Weight”)and Voids in AggregateC125 Terminology Relating to Concrete and Concrete Ag-gregatesC1
9、36/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusD75/D75M Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and T
10、estSieves3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification, referto Terminology C125.4. Classification4.1 Two general types of lightweight aggregate are coveredby this specification as follows:4.1.1 Group IAggregates prepared by expanding productssuch as perlite
11、 or vermiculite.NOTE 1These aggregates generally produce concrete having a densityfrom 15 to 50 lb/ft3(240 to 800 kg/m3), the thermal conductivity of whichmay be expected to range from 0.45 to 1.50 Btuin/hft2F (0.065 to 0.22W/mK).4.1.2 Group IIAggregates prepared by expanding,calcining, or sintering
12、 products such as blast-furnace slag, clay,diatomite, fly ash, shale, or slate; and aggregates prepared byprocessing natural materials, such as pumice, scoria, or tuff.NOTE 2These aggregates generally produce concrete having a densityfrom 45 to 90 lb/ft3(720 to 1440 kg/m3), the thermal conductivity
13、ofwhich may be expected to range from 1.05 to 3.00 BTUin/hft2 F (0.15to 0.43 W/mK).1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.21 on Lightweight Aggregates and Concrete.Current edition appro
14、ved June 15, 2017. Published July 2017. Originallyapproved in 1954. Last previous edition approved in 2009 as C332 09. DOI:10.1520/C0332-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
15、e 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 Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed i
16、n accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.2 The aggregate shall b
17、e composed predominantly oflightweight cellular and granular inorganic material.5. Physical Properties5.1 Insulating PropertiesThe thermal insulating proper-ties of concrete made from the lightweight aggregate under testshall conform to the following limits:Maximum Average 28-Day Maximum AverageOven
18、-Dry Thermal Conductivity,Bulk Density, lb/ft3Btuin/hft2F(kg/m3) (W/mK)50 (800)90 (1440)1.50 (0.22)3.00 (0.43)5.2 GradingThe grading shall conform to the require-ments shown in Table 1.5.2.1 Uniformity of GradingTo ensure reasonable unifor-mity in the gradation of successive shipments of lightweight
19、aggregates, fineness modulus determination shall be madeperiodically. If the fineness modulus of the aggregate differs bymore than 7 % from that of the sample submitted foracceptance, the aggregate is subject to rejection, unless thesupplier demonstrates that it will produce concrete of therequired
20、characteristics.5.3 Loose Bulk Density (Test Method C29/C29M)The dryloose bulk density of lightweight aggregates shall conform tothe requirements shown in Table 2.5.3.1 Uniformity of Loose Bulk DensityThe dry loose bulkdensity of successive shipments of lightweight aggregates shallnot differ by more
21、 than 10 % from that of the sample submittedfor acceptance.6. Sampling and Testing for Aggregate Properties6.1 Sample lightweight aggregates and determine the prop-erties enumerated in this specification in accordance with thefollowing methods:6.1.1 SamplingPractice D75/D75M, except samplebagged mat
22、erials by riffling and then quartering.6.1.2 GradingMethod C136/C136M, except that when amechanical sieving device is used, the sieving time shall be 5min and the following modification shall apply:6.1.2.1 Fine aggregateThe mass of the test sample shallbe in accordance with the following table:Nomin
23、al Densitylb/ft3(kg m3)Mass of TestSample, g5 to 15 (80 to 240) 5015 to 25 (240 to 400) 10025 to 35 (400 to 560) 15035 to 45 (560 to 720) 20045 to 55 (720 to 880) 25055 to 65 (880 to 1040) 30065 to 70 (1040 to 1120) 3506.1.2.2 Coarse AggregateThe sample shall be not lessthan 0.1 ft3(2830 cm3) of the
24、 material obtained in making thebulk density determination.6.1.3 Loose Bulk DensityTest Method C29/C29M utiliz-ing the shoveling procedure described in Test Method C29/C29M, except test the aggregate in an oven-dry condition.6.1.4 Fineness ModulusCalculate as described in TestMethod C136/C136M.TABLE
25、 1 Grading Requirements for Lightweight Aggregates for Insulating ConcreteNominalSizeDesigna-tionPercentages (Mass) Passing Sieves Having Square Openings19.0-mm(34-in.)12.5-mm(12-in.)9.5-mm(38-in.)4.75-mm(No. 4)2.36-mm(No. 8)1.18-mm(No. 16)600-m(No. 30)300-m(No. 50)150-m(No. 100)Group IPerlite . . .
26、 100 85 to 100 40 to 85 20 to 60 5 to 25 0 to 10VermiculiteA(Coarse) . . 100 98 to 100 60 to 100 30 to 85 2 to 45 1 to 20 0 to 10Vermiculite (Fine) . . . . 100 85 to 100 35 to 85 2 to 40 0 to 10Group IIFine aggregate:4.75-mm (No. 4) to 0. . 100 85 to 100 . 40 to 80 . 10 to 35 5 to 25Coarse Aggregate
27、:12.5 to 4.75-mm(12-in. to No. 4)100 90 to 100 40 to 80 0 to 20 0 to 10 . . . .9.5 to 2.36-mm (38-in.to No. 8). 100 80 to 100 5 to 40 0 to 20 . . . .4.75 to 2.36-mm (No. 4to No. 8). . 100 90 to 100 0 to 20 . . . .Combined Fine andCoarse Aggregate:12.5-mm (12-in.) to 0 100 95 to 100 . 50 to 80 . . .
28、5 to 20 2 to 159.5-mm (38-in.) to 0 .10090 to 100 65 to 90 35 to 65 . . 10 to 25 5 to 15AAttention is directed to the need for adjustment in water content and air entrainment to achieve comparable oven-dry unit weights for the two gradings.TABLE 2 Bulk Density Requirement for Lightweight Aggregateso
29、f Insulating ConcreteSize DesignationDry Loose Bulk Densitylb/ft3(kg/m3)Min MaxGroup I:Perlite 7.5 (120) 12 (196)Vermiculite 5.5 (88) 10 (160)Group II:Fine aggregate . 70 (1120)Coarse aggregate . 55 (880)Combined fine and coarseaggregate. 65 (1040)C332 1727. Test Methods for Insulating Concrete Prop
30、erties7.1 Determine the density and thermal conductivity of theconcrete in accordance with the following methods:7.1.1 Specimen PreparationPrepare three specimens foreach type of test, applying the same composition and fabrica-tion procedure as is proposed for use. Moist-cure the speci-mens for 7 da
31、ys and then remove them from the moist roomand store at a temperature of 73.4 6 3F(236 1.7 C) and ata relative humidity of 50 6 5 % until the time of test. Dry thespecimens at the age of 28 days in an oven at 230 6 18 F (1106 10 C) and weigh them at 24-h intervals until the loss inmass does not exce
32、ed 1 % in a 24-h period.7.1.2 Concrete DensityDetermine the density from speci-mens each of which has a volume of not less than 0.1 ft3(2 L).Determine the mass and dimensions of the oven-dry specimensand compute the volume and the density from the average dataobtained.7.1.3 Thermal ConductivityDeter
33、mine the thermal con-ductivity in accordance with Test Method C177, except prepareand cure the specimens in accordance with 7.1.1. The dimen-sions of the specimens shall be as required for the testingequipment available. Report the details of the composition andfabrication procedure used in preparin
34、g the specimens.8. Rejection and Rehearing8.1 Material that fails to conform to the requirements of thisspecification is subject to rejection. Rejection shall be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the result of the test, the producer orsupplie
35、r shall make claim for a rehearing.8.2 The purchaser of materials covered by this specificationshall have the option of evaluating these materials for rejectionby either minimum mass or approximate volume as stated.8.3 Individual packages are subject to rejection when:8.3.1 The contents, on a mass b
36、asis, are 5 % less than thatindicated on the package, or8.3.2 The contents, on a volume basis, are 10 % less thanthat indicated on the package.8.4 The entire shipment is subject to rejection.8.4.1 On a mass basis when the average contents of twopackages for each 100, but not less than 6 packages sel
37、ected atrandom, in any one shipment, are less than that indicated on thepackage.8.4.2 On a volume basis when the average contents of twopackages for each 100, but not less than 6 packages selected atrandom, in any one shipment differ by more than 5 % from thatindicated on the package.8.5 The net mas
38、s of the contents shall be determined byweighing the package or packages and deducting the mass ofthe container.8.6 The bulk volume of the contents in a package shall becalculated by determining the mass of the contents of thepackage and dividing by the bulk density of the aggregate. Thebulk density
39、 of the aggregate shall be determined in accordancewith the shoveling procedure given in Test Method C29/C29Musing material from one or more of the packages selected in8.4.2.9. Certification9.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished
40、 to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification and hasbeen found to meet the requirements. When specified in thepurchase order or contract, a report of the test results shall befurnished.10. Packaging and Package Marking10.1 W
41、hen lightweight aggregates covered by this specifi-cation are delivered in packages, the name of the manufacturer,type of aggregate, and minimum mass and approximate vol-ume of the contents shall be plainly indicated thereon.11. Keywords11.1 insulating concrete; lightweight aggregate; thermalpropert
42、iesSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this specification since the last issue,C332 09, that may impact the use of this specification. (Approved June 15, 2017.)(1) Added terminology section.C332 173ASTM International takes no position respecting the val
43、idity of any patent rights asserted in connection with 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 sub
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45、rters. Your comments will receive careful consideration 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 standa
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