1、Designation:C33217Standard 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 number in
2、 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-tended for
3、 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 figures)shall
4、 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 standard valu
5、e 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.1.4 The follow
6、ing 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 safety and healthpractices
7、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 Standards,Guides and Recom
8、-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-gregatesC136/C136M Test Method for Sie
9、ve 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 TestSieves3.Terminology3.1 De
10、finitions: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 or vermiculite.NOTE1These aggr
11、egates 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 products such as blast-furnace sla
12、g,clay,diatomite,fly ash,shale,or slate;and aggregates prepared byprocessing natural materials,such as pumice,scoria,or tuff.NOTE2These 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
13、 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 approved June 15,2017.Published July 2017.Originall
14、yapproved 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 volume information,refer to the standards Document Summary p
15、age 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 in accordance with internationally recognized principles on st
16、andardization 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.1 4.2 The aggregate shall be 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:Maximu
