1、Designation: C1691 11 (Reapproved 2017)Standard Specification forUnreinforced Autoclaved Aerated Concrete (AAC) MasonryUnits1This standard is issued under the fixed designation C1691; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 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 solid, unreinforced masonryunits manufactured from autoclaved aerated concrete
3、(AAC), acementitious product. This specification addresses dimensionaltolerances, maximum limits for drying shrinkage, and shippingand handling.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are pr
4、ovided for information onlyand are not considered standard.1.3 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, health, and environmental practices and deter-mi
5、ne the applicability of regulatory limitations prior to use.1.4 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
6、 issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C1232 Terminology for MasonryC1693 Specification for Autoclaved Aerated Concrete(AAC)3. Terminology3.1 DefinitionsTerms defined in Terminology C1232 shallapply in this specif
7、ication.4. Classification4.1 AAC masonry units manufactured in accordance withthis specification shall be classified according to their strengthclass.5. Materials and Manufacture5.1 AAC masonry units manufactured in accordance withthis specification shall be composed entirely of AAC materialconformi
8、ng to Specification C1693.6. Physical Requirements6.1 Compressive StrengthThe compressive strength of theunits shall be determined according to Specification C1693 andshall conform to the requirements of Specification C1693 forthe strength class in which the units are classified.6.2 Dry Bulk Density
9、The dry bulk density shall be deter-mined according to Specification C1693 and shall conform tothe requirements of Specification C1693 for the strength classin which the units are classified.6.3 Drying ShrinkageThe drying shrinkage shall be deter-mined in accordance with Specification C1693 and shal
10、lconform to the requirements of Specification C1693 for thestrength class in which the units are specified.7. Dimensions and Permissible Variations7.1 The specified dimensions of the units shall be estab-lished by the AAC unit manufacturer.7.2 No overall unit dimension (width, height, or length)shal
11、l differ by more than18 in. (3 mm) from the correspondingspecified dimension8. Visual Inspection8.1 All units shall be sound and free of defects that wouldinterfere with the proper placing of the unit or impair thestrength or permanence of the construction. Minor imperfec-tions incidental to the usu
12、al methods of manufacture, orresulting from customary methods of handling in shipment anddelivery, shall not be deemed grounds for rejection.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.10 on Auto
13、claved Aerated Concrete Masonry Units.Current edition approved Dec. 1, 2017. Published January 2018. Originallyapproved in 2009. Last previous edition approved in 2011 as C1391 11. DOI:10.1520/C1691-11R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer S
14、ervice 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 i
15、n 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.19. Sampling and Testing9.
16、1 The purchaser or the authorized representative shall beaccorded proper facilities to inspect and sample the units at theplace of manufacture from the lots ready for delivery.10. Rejection and Rehearing10.1 If the shipment fails to conform to the specificrequirements, the manufacturer shall be perm
17、itted to sort it, andnew specimens shall be selected by the purchaser from theretained lot and tested. If the second set of specimens fails toconform to the test requirements, the entire lot shall berejected.NOTE 1Unless otherwise specified in the purchase order, the cost oftests is typically borne
18、as follows: If the results of the tests show that theunits do not conform to the requirements of this specification, the cost istypically borne by the seller. If the results of the tests show that the unitsdo conform to the requirements of this specification, the cost is typicallyborne by the purcha
19、ser.11. Keywords11.1 autoclaved aerated concrete (AAC); compressivestrength; density; masonry units; shrinkageASTM International 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
20、 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 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either rea
21、pproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If yo
22、u 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 copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual
23、 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 11 (2017)2
