1、Designation: C 332 07Standard Specification forLightweight Aggregates for Insulating Concrete1This standard is issued under the fixed designation C 332; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript 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*1.1 This specification covers lightweight aggregates in-t
3、ended 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 fi
4、gures) 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 the
5、 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.1.4 The following precautionary caveat pertains only to thetest method portion, Section 6, of the specification: Thisstandard does not purpo
6、rt 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 safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C 29/C
7、 29M Test Method for Bulk Density (“Unit Weight”)and Voids in AggregateC 136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC 177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusD75 Practice for Sampling A
8、ggregatesE11 Specification for Wire Cloth and Sieves for TestingPurposes3. Classification3.1 Two general types of lightweight aggregate are coveredby this specification as follows:3.1.1 Group IAggregates prepared by expanding productssuch as perlite or vermiculite.NOTE 1These aggregates generally pr
9、oduce 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).3.1.2 Group IIAggregates prepared by expanding, calcin-ing, or sintering products such as blast-furnace slag, clay,diatom
10、ite, 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 ofwhich may be expected to range from 1.05 to 3.0
11、0 BTUin/hft2 F (0.15to 0.43 W/mK).3.2 The aggregate shall be composed predominantly oflightweight cellular and granular inorganic material.4. Physical Properties4.1 Insulating PropertiesThe thermal insulating proper-ties of concrete made from the lightweight aggregate under testshall conform to the
12、following limits:Maximum Average 28-Day Maximum AverageOven-Dry Thermal Conductivity,Bulk Density, lb/ft3Btuin/hft2F(kg/m3) (W/mK)50 (800)90 (1440)1.50 (0.22)3.00 (0.43)4.2 GradingThe grading shall conform to the require-ments shown in Table 1.1This specification 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 July 15, 2007. Published August 2007. Originallyapproved in 1954. Last previous edition approved in 1999 as C 332 99.2For referenced A
14、STM 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.1*A Summary of Changes section appears at the end of this standard.Copyright A
15、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2.1 Uniformity of GradingTo ensure reasonable unifor-mity in the gradation of successive shipments of lightweightaggregates, fineness modulus determination shall be madeperiodically. If the finen
16、ess modulus of the aggregate differs bymore than 7 % from that of the sample submitted for accep-tance, the aggregate is subject to rejection, unless the supplierdemonstrates that it will produce concrete of the requiredcharacteristics.4.3 Loose Bulk Density (Test Method C 29/C 29M)Thedry loose bulk
17、 density of lightweight aggregates shall conformto the requirements shown in Table 2.4.3.1 Uniformity of Loose Bulk DensityThe dry loosebulk density of successive shipments of lightweight aggregatesshall not differ by more than 10 % from that of the samplesubmitted for acceptance.5. Sampling and Tes
18、ting for Aggregate Properties5.1 Sample lightweight aggregates and determine the prop-erties enumerated in this specification in accordance with thefollowing methods:5.1.1 SamplingPractice D75, except sample bagged ma-terials by riffling and then quartering.5.1.2 GradingMethod C 136, except that whe
19、n a me-chanical sieving device is used, the sieving time shall be 5 minand the following modification shall apply:5.1.2.1 Fine aggregateThe mass of the test sample shallbe in accordance with the following table:Nominal Densitylb/ft3(kg/m3)Mass of TestSample, g5 to 15 (80 to 240) 5015 to 25 (240 to 4
20、00) 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) 3505.1.2.2 Coarse AggregateThe sample shall be not lessthan 0.1 ft3(2830 cm3) of the material obtained in making thebulk density determination.5.1.3 Loose Bulk DensityT
21、est Method C 29/C 29M utiliz-ing the shoveling procedure described in Test Method C 29/C 29M, except test the aggregate in an oven-dry condition.5.1.4 Fineness ModulusCalculate as described in TestMethod C 136.6. Test Methods for Insulating Concrete Properties6.1 Determine the density and thermal co
22、nductivity of theconcrete in accordance with the following methods:6.1.1 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 days and then remove them from the moist roomand
23、 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 exceed 1 % in a 24-h period.6.1.2 Concrete Density
24、Determine the density from speci-mens each of which has a volume of not less than 0.1 ft3(2 L).TABLE 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.)4.7
25、5-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 . . . 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
26、IIFine aggregate:4.75-mm (No. 4) to 0. . 100 85 to 100 . 40 to 80 . 10 to 35 5 to 25Coarse Aggregate: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
27、to 20 . . . .Combined Fine andCoarse Aggregate:12.5-mm (12-in.) to 0 100 95 to 100 . 50 to 80 . . . 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 ove
28、n-dry unit weights for the two gradings.TABLE 2 Bulk Density Requirement for Lightweight Aggregatesof 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 (
29、880)Combined fine and coarseaggregate. 65 (1040)C332072Determine the mass and dimensions of the oven-dry specimensand compute the volume and the density from the average dataobtained.6.1.3 Thermal ConductivityDetermine the thermal con-ductivity in accordance with Test Method C 177, exceptprepare and
30、 cure the specimens in accordance with 6.1.1. Thedimensions of the specimens shall be as required for the testingequipment available. Report the details of the composition andfabrication procedure used in preparing the specimens.7. Rejection and Rehearing7.1 Material that fails to conform to the req
31、uirements 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 orsupplier shall make claim for a rehearing.7.2 The purchaser of materials covered by this speci
32、ficationshall have the option of evaluating these materials for rejectionby either minimum mass or approximate volume as stated.7.3 Individual packages are subject to rejection when:7.3.1 The contents, on a mass basis, are 5 % less than thatindicated on the package, or7.3.2 The contents, on a volume
33、 basis, are 10 % less thanthat indicated on the package.7.4 The entire shipment is subject to rejection.7.4.1 On a mass basis when the average contents of twopackages for each 100, but not less than 6 packages selected atrandom, in any one shipment, are less than that indicated on thepackage.7.4.2 O
34、n 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.7.5 The net mass of the contents shall be determined byweighing the package or packages and deducting
35、the mass ofthe container.7.6 The volume of the contents in the package shall becalculated by determining the mass of the contents of thepackage and then obtaining the bulk density of the aggregate,from an average mass package of the samples selected in 7.4.2,by the procedure given in Test Method C 2
36、9/C 29M and thendividing the mass of the contents of the bag by the bulk densityof aggregate.8. Certification8.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspecte
37、d 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.9. Packaging and Package Marking9.1 When lightweight aggregates covered by this specifica-tion are delivered in packages
38、, the name of the manufacturer,type of aggregate, and minimum mass and approximate vol-ume of the contents shall be plainly indicated thereon.10. Keywords10.1 insulating concrete; lightweight aggregate; thermalpropertiesSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes
39、to this specification since the last issue,C 332 99, that may impact the use of this specification. (Approved July 15, 2007)(1) Changed the words “unit weight” to “bulk density,”“weight” to “density,” or “weight” to “mass” throughout.ASTM International takes no position respecting the validity of an
40、y 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 subject to rev
41、ision at any time by the responsible technical 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
42、 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 standard is copyr
43、ighted by ASTM International, 100 Barr Harbor 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.astm.org).C332073
