1、Designation: C1691 09Standard 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, the year of last
2、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 (AAC), acementitio
3、us 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 provided for informa
4、tion 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 and health practices and determine the applica-bility of regulatory
5、 limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C1232 Terminology of MasonryC1693 Specification for Autoclaved Aerated Concrete(AAC)3. Terminology3.1 DefinitionsTerms defined in Terminology C1232 shallapply in this practice.3.2 Definitions of Terms Specific to This Standard:3.2.
6、1 autoclaved aerated concrete (AAC), nlow-densitycementitious product of calcium silicate hydrates in which thelow density is obtained by the formation of macroscopic airbubbles, mainly by chemical reactions within the mass duringthe liquid or plastic phase. The air bubbles are uniformlydistributed
7、and are retained in the matrix on setting, hardening,and subsequent high-pressure steam curing, to produce acellular structure. Material specifications for this product areprescribed in Specification C1693.4. Classification4.1 AAC masonry units manufactured in accordance withthis specification shall
8、 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 materialconforming to Specification C1693.6. Physical Requirements6.1 Compressive StrengthThe compressive strength of
9、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 DensityThe dry bulk density shall be deter-mined according to Specification C1693 and shall conform tothe req
10、uirements of Specification C1693 for the strength classin which the units are classified.6.3 Drying ShrinkageThe drying shrinkage shall be de-termined in accordance with Specification C1693 and shallconform to the requirements of Specification C1693 for thestrength class in which the units are speci
11、fied.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)shall differ by more than18 in. (3 mm) from the correspondingspecified dimension8. Visual Inspection8.1 Al
12、l 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 usual methods of manufacture, orresulting from customary methods of handling in shipment anddelivery, sha
13、ll 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 Autoclaved Aerated Concrete Masonry Units.Current edition approved July 1, 2009. Published November 2009.
14、DOI:10.1520/C1691-09.2For 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.1Copyright ASTM International, 100 Barr
15、Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.9. Sampling and Testing9.1 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 Rehear
16、ing10.1 If the shipment fails to conform to the specific require-ments, the manufacture shall be permitted to sort it, and newspecimens shall be selected by the purchaser from the retainedlot and tested. If the second set of specimens fails to conformto the test requirements, the entire lot shall be
17、 rejected.NOTE 1Unless otherwise specified in the purchase order, the cost oftests is typically borne 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 t
18、he unitsdo conform to the requirements of this specification, the cost is typicallyborne by the purchaser.11. Keywords11.1 autoclaved aerated concrete (AAC); compressivestrength; density; masonry units; shrinkageASTM International takes no position respecting the validity of any patent rights assert
19、ed 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 their own responsibility.This standard is subject to revision at any time by t
20、he 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 be addressed to ASTM International Headquarters. Your comments will receive
21、 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 Standards, at the address shown below.This standard is copyrighted by ASTM Interna
22、tional, 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).C1691 092
