1、Designation: C1692 10Standard Practice forConstruction and Testing of Autoclaved Aerated Concrete(AAC) Masonry1This standard is issued under the fixed designation C1692; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONMasonry units of autoclaved aerated concrete (AAC) can be produced with dimensional tolerancesas small as 0.06 in. (1.5
3、 mm). As a consequence, AAC masonry units can be laid with mortar jointsapproximately 0.38 in. (10 mm) thick, and also with thinner joints. The exterior face of the resultingAAC masonry wall is then protected from the elements using an exterior wythe of masonry, a claddingsystem, or a breathable coa
4、ting resistant to penetration by liquid water. The interior face can beplastered, furred, or painted.1. Scope1.1 This practice applies to construction and testing ofmasonry made of AAC units. It includes or references termi-nology, material specifications, and methods of test. It refer-ences specifi
5、cations and test methods.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 information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafe
6、ty 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.2. Referenced Documents2.1 ASTM Standards:2C270 Specification for Mortar fo
7、r Unit MasonryC476 Specification for Grout for MasonryC1072 Test Methods for Measurement of Masonry FlexuralBond StrengthC1232 Terminology of MasonryC1660 Specification for Thin-bed Mortar for AutoclavedAerated Concrete (AAC) MasonryC1691 Specification for Unreinforced Autoclaved AeratedConcrete (AA
8、C) Masonry UnitsC1693 Specification for Autoclaved Aerated Concrete(AAC)C1717 Test Methods for Conducting Strength Tests ofMasonry Wall PanelsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE514 Test Method for Water Penetration and LeakageThrough MasonryE518 Test Methods for Flexural
9、Bond Strength of MasonryE519 Test Method for Diagonal Tension (Shear) in MasonryAssemblages2.2 Other Standards:TMS 40208 / ACI 53009 / ASCE 508 Building CodeRequirements for Masonry Structures3TMS 602-08 / ACI 530.1-08 / ASCE 6-08 Specification forMasonry Structures33. Terminology3.1 DefinitionsTerm
10、s defined in Terminology C1232 shallapply in this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 autoclaved aerated concrete (AAC)low-density ce-mentitious product of calcium silicate hydrates in which thelow density is obtained by the formation of macroscopic airbubbles, mainly b
11、y chemical reactions within the mass duringthe liquid or plastic phase. The air bubbles are uniformlydistributed and are retained in the matrix on setting, hardening,1This practice is under the jurisdiction of ASTM Committee C15 on Manufac-tured Masonry Units and is the direct responsibility of Subc
12、ommittee C15.10 onAutoclaved Aerated Concrete Masonry Units.Current edition approved Dec. 15, 2010. Published December 2010. Originallyapproved in 2009. Last previous edition approved in 2009 as C1692 09. DOI:10.1520/C1692-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orco
13、ntact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from The Masonry Society, 3970 Broadway, Suite 201-D Boulder,CO 803041135, http:/www.masonrysociety.org.1Copyright ASTM Inte
14、rnational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.and subsequent high-pressure steam curing, to produce acellular structure. Material specifications for this product areprescribed in Specification C1693.4. Significance and Use4.1 This practice applies to
15、the materials and methods usedin the construction of AAC masonry. It directly references theAAC materials standards under the jurisdiction of ASTMCommittee C27 and the workmanship requirements ofTMS 602-08 / ACI 530.1-08 / ASCE 6-08 and supplementsthose workmanship requirements with additional requi
16、rementsparticular to AAC masonry.5. Materials5.1 AAC masonry units shall conform to SpecificationC1691.5.2 Mortar for thick-bed AAC masonry shall meet theperformance standards prescribed by the AAC manufacturer.5.3 Mortar for thin-bed AAC masonry shall comply withSpecification C1660.NOTE 1In general
17、, AAC manufacturers performance standards formortar for AAC masonry address minimum dry compressive strength,minimum wet compressive strength, minimum bond strength, minimumopen time, and minimum working time. They also require that the mortarprovide sufficient bond to the AAC masonry unit so that f
18、lexural tensilestrength is controlled by the flexural tensile strength of the units ratherthan by the bond between units and mortar.5.4 Grout shall conform to Specification C476.6. Methods of Test6.1 Compressive Strength Test for AAC MasonryReportthe compressive strength of the AAC masonry as the st
19、rengthof the AAC material determined in accordance with Specifi-cation C1693.NOTE 2Bond-strength requirements for AAC masonry mortar (Note1) result in AAC masonry assemblages that behave monolithically. Thecompressive strength of anAAC prism depends on the prisms aspect ratioonly, and not on the pre
20、sence, number, or orientation of joints. Anyreasonable aspect ratio can be used to verify compressive strength,provided that the same aspect ratio is used to calibrate design equations.Design equations for AAC masonry are calibrated using compressivestrengths determined in accordance with Specificat
21、ion C1693.Itistherefore appropriate to report those same strengths, which SpecificationC1693 requires AAC manufacturers to determine and report.NOTE 3The tests noted in subsections 6.2 through 6.4 are not requiredby TMS 40208 / ACI 53009 / ASCE 508 or TMS 602-08 / ACI530.1-08 / ASCE 6-08. They may b
22、e required for research purposes orother reasons.6.2 Flexural Strength Test for AAC MasonryAssemblagesIf required, conduct flexural strength tests inaccordance with Test Methods C1717, E518,orC1072.6.2.1 If conducting flexural strength tests in accordancewith Test Methods E518, construct at least fi
23、ve test specimensas stack-bonded prisms at least 32 in. (0.81 m) high. Usemortar meeting the performance requirements of the AACmanufacturer. Conduct the flexural strength test in accordancewith Test Methods E518, Test Method A (Simply SupportedBeam with Third-point Loading).6.2.2 If conducting flex
24、ural strength tests in accordancewith Test Method C1072, construct test specimens as stack-bonded prisms comprising at least three bed joints. Test a totalof at least five joints. Use mortar complying with 5.2 or 5.3 asappropriate.6.3 Shear Strength Test for AAC Masonry AssemblagesIfrequired, conduc
25、t shear strength tests in accordance with TestMethod E519. Cure the gypsum capping material for at leastsix hours prior to testing. Use mortar complying with 5.2 or 5.3as appropriate.6.4 Modulus of Elasticity of AAC UnitsIf required, deter-mine the modulus of elasticity in accordance with Specificat
26、ionC1693.7. Workmanship for Thick-bed AAC Masonry7.1 Workmanship shall be in accordance with TMS 602-08/ ACI 530.1-08 / ASCE 6-08 (Part 3Execution), and with theadditional requirements of this practice.7.2 Install the first course in a full bed of mortar conformingto Specification C270,TypeM,SorN.7.
27、3 Use thick-bed mortar complying with 5.2.7.4 Mix thick-bed mortar as prescribed by the AAC manu-facturer.7.5 Lay subsequent courses using thick-bed mortar, follow-ing the provisions of TMS 602-08 / ACI 530.1-08 / ASCE 6-08(Part 3Execution) for laying solid units.7.6 Make minor adjustments by sandin
28、g the surfaces of theunits using a sanding board.7.7 If it is necessary to field-cut units, cut them totolerances consistent with 5.1.7.8 If AAC masonry is to be grouted, wet it thoroughlybefore grouting, to ensure that the grout flows to completely fillthe space to be grouted.8. Workmanship for Thi
29、n-bed AAC Masonry8.1 Workmanship shall be in accordance with TMS 602-08/ ACI 530.1-08 / ASCE 6-08 (Part 3Execution), and with theadditional requirements of this practice.8.2 Install the first course in a full bed of mortar conformingto Specification C270,TypeM,SorN.8.3 Use thin-bed mortar complying
30、with 5.3.8.4 Mix thin-bed mortar as prescribed by the AAC manu-facturer.8.5 Lay subsequent courses using thin-bed mortar. Use thespecial notched trowel available from theAAC manufacturer tospread the thin-bed mortar so that it completely fills the bedjoints. Similarly fill the head joints, unless th
31、e units aredesigned to be connected across the head joints by tongue-and-groove or other mechanical means rather than by thin-bedmortar. Spread mortar and place the next unit before the mortardries. Set the units into final position, in mortar joints approxi-mately 0.06-in. (1.5-mm) thick, by striki
32、ng on the end and topof the unit with a rubber mallet.8.6 Lay units in alignment with either the inside or theoutside plane of the wall. Align vertically and plumb usingonly the first course for reference. Make minor adjustments bysanding the surfaces of the units with a sanding board.8.7 If it is n
33、ecessary to field-cut units, cut them totolerances consistent with 5.1.C1692 1028.8 If AAC masonry is to be grouted, wet it thoroughlybefore grouting, to ensure that the grout flows to completely fillthe space to be grouted.9. Exterior Surface Treatment9.1 AAC masonry exposed to weather shall be pro
34、tectedwith an exterior wythe of masonry, a cladding system, or acoating complying with the requirements of 9.2 and 9.3.9.2 Vapor PermeabilityThe PERM rating of the coating,determined in accordance with Test Methods E96/E96M, shallnot be less than 5.9.3 Liquid PermeabilityThe coating shall show no le
35、ak-age when tested using the following procedure:9.3.1 As shown in Fig. 1, prepare an AAC masonryassemblage with plan dimensions of 12 by 12 in. (0.3 by 0.3 m)and a thickness of 1 in. (25 mm). Make the assemblage usingtwo pieces of AAC material with a vertically oriented jointbetween them. Join the
36、two pieces at the joint using thin-bed orthick-bed mortar as appropriate to the AAC masonry beingtested. Cover the top surface with the coating to be tested.Affixto the top surface of the specimen, over the joint, a clear glassor plastic measurement tube with an inside diameter between 2and 4 in. (5
37、0 and 100 mm), and a height of at least 24 in. (0.6m). Prepare a reference tube, closed at the bottom, of the samematerial and dimensions as the measurement tube. Fill themeasurement tube and the reference tube with water to a heightof 21.6 in. (0.55 m), within a tolerance of 61 in. (25 mm). Notethe
38、 original height of water, and the height after 5 h, in themeasurement tube and in the reference tube. Record thedifference between the initial height and the final height ofwater in the measurement tube, and in the reference tube. Ifthose differences differ by less than 1 mm, the coating shall beco
39、nsidered to have shown no leakage.NOTE 4The above test method is intended to verify the water-penetration resistance of the coating only, when applied to an AACmasonry substrate. To examine the water-penetration resistance of anAAC masonry system, tests such as Test Method E514 are appropriate.10. K
40、eywords10.1 autoclaved aerated concrete (AAC); masonry; work-manshipBIBLIOGRAPHY(1) Autoclaved Aerated Concrete: Properties, Testing, and Design,RILEM Recommended Practice, Taylor or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 1 Masonry Assemblage for Testing Liquid Permeability of Exterior Surface Treatment for AAC MasonryC1692 103
