ASTM_C_1693_-_11_2017.pdf

Designation:C169311(Reapproved 2017)Standard Specification forAutoclaved Aerated Concrete(AAC)1This standard is issued under the fixed designation C1693;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers autoclaved aerated concrete(AAC),a cementitious product based on calcium silicatehydrates in which low density is attained by the inclusion of anagent resulting in macroscopic voids,and in which curing iscarried out using high-pressure steam.1.2 The raw materials used in the production of autoclavedaerated concrete are portland cement or blended cements,quartz sand,water,lime,gypsum or anhydrite,and an agentresulting in macroscopic voids.The quartz sand used as a rawmaterial may be replaced by a siliceous fine aggregate otherthan sand,and usually is ground to a fine powder before use.Fly ash may be used as a sand replacement.The batched rawmaterials are mixed thoroughly together to form a slurry.Theslurry is cast into steel molds.Due to the chemical reactionsthat take place within the slurry,the volume expands.Aftersetting,and before hardening,the mass is machine cut intounits of various sizes.The units then are steam-cured underpressure in autoclaves where the material is transformed into ahard calcium silicate.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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 regulatory limitations prior to use.See Section 6,7,and 8.1.5 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-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C22/C22M Specification for GypsumC33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC144 Specification for Aggregate for Masonry MortarC150 Specification for Portland CementC332 Specification for Lightweight Aggregates for Insulat-ing ConcreteC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC1692 Practice for Construction and Testing of AutoclavedAerated Concrete(AAC)MasonryE4 Practices for Force Verification of Testing MachinesE575 Practice for Reporting Data from Structural Tests ofBuilding Constructions,Elements,Connections,and As-semblies3.Classification3.1 AAC units manufactured in accordance with this speci-fication are classified according to their strength class.4.Materials and Manufacture4.1 Raw MaterialsMaterials shall conform to the follow-ing applicable specifications:4.1.1 Portland Cement,Specification C150.4.1.2 Blended Cements,Specification C595/C595M.4.1.3 Pozzolan,Specification C618.4.1.4 Gypsum,Specification C22/C22M.4.1.5 Aggregates,Specifications C33,C144,or C332.5.Physical Requirements5.1 Compressive StrengthThe compressive strength shallbe determined according to Section 6 and shall conform to therequirements of Table 1.1This specification is under the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.60 onPrecast Autoclaved Aerated Concrete.Current edition approved June 1,2017.Published July 2017.Originally approvedin 2009.Last previous edition approved in 2011 as C1693 11.DOI:10.1520/C1693-11R17.2For 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.Copyright 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 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.1 5.2 Dry Bulk DensityThe dry bulk density shall be deter-mined according to Section 7 and shall conform to therequirements of Table 1.5.3 Drying ShrinkageThe drying shrinkage shall be deter-mined in accordance with Section 8,and shall conform to therequirements of Table 1.5.4 M