1、Designation: C332 09Standard 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 Department of Defense.1. Scope*1.1 This specification covers lightweight aggregates in-tend
3、ed 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 figur
4、es) 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 st
5、andard 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 standard.1
6、.4 The following precautionary caveat pertains only to thetest method portion, Section 6, 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 safety an
7、d healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density (“Unit Weight”)and Voids in AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC177 Test Method for Steady-
8、State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. Classification3.1 Two general types of lightweight aggregate are coveredby this specifica
9、tion as follows:3.1.1 Group IAggregates prepared by expanding productssuch as perlite 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 (0.06
10、5 to 0.22W/mK).3.1.2 Group IIAggregates prepared by expanding, calcin-ing, or sintering 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 conc
11、rete 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 3.00 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
12、 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-Dry Thermal Conductivity,Bulk Density, lb/ft3Btuin/hft2F(kg/m3) (W/mK)50 (800)90 (1440)1.50 (0.22)3.00 (
13、0.43)4.2 GradingThe grading shall conform to the require-ments shown in Table 1.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.21 on Lightweight Aggregates and Concrete.Current edition approve
14、d Nov. 1, 2009. Published December 2009. Originallyapproved in 1954. Last previous edition approved in 2007 as C332 07. DOI:10.1520/C0332-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volu
15、me 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 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2.1 Uniformity of GradingTo ensure re
16、asonable unifor-mity in the gradation of successive shipments of lightweightaggregates, fineness modulus determination shall be madeperiodically. If the fineness modulus of the aggregate differs bymore than 7 % from that of the sample submitted for accep-tance, the aggregate is subject to rejection,
17、 unless the supplierdemonstrates that it will produce concrete of the requiredcharacteristics.4.3 Loose Bulk Density (Test Method C29/C29M)The dryloose bulk density of lightweight aggregates shall conform tothe requirements shown in Table 2.4.3.1 Uniformity of Loose Bulk DensityThe dry loosebulk den
18、sity of successive shipments of lightweight aggregatesshall not differ by more than 10 % from that of the samplesubmitted for acceptance.5. Sampling and Testing for Aggregate Properties5.1 Sample lightweight aggregates and determine the prop-erties enumerated in this specification in accordance with
19、 thefollowing methods:5.1.1 SamplingPractice D75, except sample bagged ma-terials by riffling and then quartering.5.1.2 GradingMethod C136, except that when a mechani-cal sieving device is used, the sieving time shall be 5 min andthe following modification shall apply:5.1.2.1 Fine aggregateThe mass
20、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 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) 3505.1.2.2 Co
21、arse 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 DensityTest Method C29/C29M utiliz-ing the shoveling procedure described in Test Method C29/C29M, except test the aggregate in an oven-dry condition.5.1.
22、4 Fineness ModulusCalculate as described in TestMethod C136.6. Test Methods for Insulating Concrete Properties6.1 Determine the density and thermal conductivity of theconcrete in accordance with the following methods:6.1.1 Specimen PreparationPrepare three specimens foreach type of test, applying th
23、e 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 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 i
24、n 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 DensityDetermine 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
25、 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 . . . 100 85 to 100 40 to 85 20 to 60 5 to 25 0 to 10Ve
26、rmiculiteA(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:12.5 to 4.75-mm(12-in. to No. 4)100 90 to 100 40
27、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 . . . 5 to 20 2 to 159.5-mm (38-in.) to 0 .10090 to 100
28、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 Aggregatesof Insulating ConcreteSize DesignationDry Loose Bul
29、k 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 092Determine the mass and dimensions of the oven-dry specimensand compute the volume and the dens
30、ity from the average dataobtained.6.1.3 Thermal ConductivityDetermine the thermal con-ductivity in accordance with Test Method C177, except prepareand cure the specimens in accordance with 6.1.1. The dimen-sions of the specimens shall be as required for the testingequipment available. Report the det
31、ails of the composition andfabrication procedure used in preparing the specimens.7. Rejection and Rehearing7.1 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 ofdi
32、ssatisfaction with the result of the test, the producer orsupplier shall make claim for a rehearing.7.2 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.7.3 Individual packa
33、ges 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 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 conte
34、nts 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 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 b
35、y 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 the mass ofthe container.7.6 The bulk volume of the contents in a package shall becalculated by determining the mass of the contents of thepackage a
36、nd dividing by the bulk density of the aggregate. Thebulk density 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 in7.4.2.8. Certification8.1 When specified in the purchase order or c
37、ontract, aproducers or suppliers certification shall be furnished 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
38、results shall befurnished.9. Packaging and Package Marking9.1 When lightweight aggregates covered by this specifica-tion 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.10. Keywords
39、10.1 insulating concrete; lightweight aggregate; thermalpropertiesSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this specification since the last issue,C332 07, that may impact the use of this specification. (Approved November 1, 2009)(1) Revised 7.6.ASTM Interna
40、tional takes no position respecting the validity 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 th
41、eir own responsibility.This standard is subject to revision 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
42、 be addressed to ASTM International Headquarters. 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 Standa
43、rds, at the address shown below.This standard is copyrighted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C332 093
