ASTM_C_1660_-_10.pdf

Designation:C166010Standard Specification forThin-bed Mortar for Autoclaved Aerated Concrete(AAC)Masonry1This standard is issued under the fixed designation C1660;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 applies to thin-bed mortar for auto-claved aerated concrete(AAC)masonry.1.2 The testing laboratory performing these test methodsshall be evaluated in accordance with Practice C1093.1.3 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 may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C91 Specification for Masonry CementC144 Specification for Aggregate for Masonry MortarC150 Specification for Portland CementC207 Specification for Hydrated Lime for Masonry Pur-posesC595 Specification for Blended Hydraulic CementsC1006 Test Method for Splitting Tensile Strength of Ma-sonry UnitsC1093 Practice for Accreditation of Testing Agencies forMasonryC1157 Performance Specification for Hydraulic CementC1180 Terminology of Mortar and Grout for Unit MasonryC1232 Terminology of MasonryC1329 Specification for Mortar CementC1384 Specification for Admixtures for Masonry MortarsC1386 Specification for Precast Autoclaved Aerated Con-crete(AAC)Wall Construction Units(Withdrawn 2013)3C1452 Specification for Reinforced Autoclaved AeratedConcrete Elements(Withdrawn 2013)3C1555 Practice for Autoclaved Aerated Concrete Masonry(Withdrawn 2009)3C1600/C1600M Specification for Rapid Hardening Hydrau-lic Cement3.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,refer to Terminologies C1180 and C1232,andSpecification C1386.3.2 Definitions of Terms Specific to This Standard:3.2.1 thin-bed mortar,npreblended mortar for use inconstruction of AAC unit masonry whose joints are approxi-mately116to18-in.(2 to 3-mm)thick.4.Significance and Use4.1 This specification applies to the thin-bed mortar mate-rials used in the construction of AAC masonry.It referencesdirectly the AAC materials standards under the jurisdiction ofASTM Committees C15 and C27 including SpecificationsC1386,C1452,and C1555.5.Materials5.1 Materials used in the preparation of thin-bed mortar forAAC masonry shall conform to the requirements specified.5.1.1 Masonry cement shall conform to Specification C91.5.1.2 Fine aggregates shall conform to Specification C144with the exception of the gradation requirements,which shallnot apply.The maximum aggregate size shall be that passing a#6 standard sieve.5.1.3 Portland cement shall conform to Specification C150.5.1.4 Hydrated lime shall conform to Specification C207.Type N lime is permitted if shown by test or performancerecord not to be detrimental to soundness of mortar.1This specification is under the jurisdiction of ASTM Committee C12 onMortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-mittee C12.03 on Specifications for Mortars.Current edition approved June 1,2010.Published June 2010.Originallyapproved in 2009.Last previous edition approved in 2009 as C1660 09.DOI:10.1520/C1660-10.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.5 Blended hydraulic cement shall conform to Specifica-tion C595.5.1.6 Hydraulic cement shall conform to SpecificationC1157.5.1.7 Mortar cement shall conform to Specification C1329.5.1.8 Rapid hardening hydraulic cement shall conform toSpecification C1600/C1600M.5.1.9 AdhesivesAt the maximum recommended dosage,the adhesive admixture shall add not more than 65 ppm(0.0065%)water soluble chloride,or 90 ppm(0.0090%)acid-soluble chloride to the mortars overall chloride content asdetermined by testing of the reference and admixed mortars inaccordance with the Soluble Chloride Content section ofSpecification C1384.5.1.10 Other materials are permitted if shown by test orperformance record not to be detrimental to the durability ofthe mortar or embedded items.6.Methods of Test6.1 Splitting Tensile Strength Test:6.1.1 Con