1、Designation: C1692 11Standard 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. Scope*1.1 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 specif
5、ications 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 thesaf
6、ety 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 f
7、or 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 (A
8、AC) 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 DefinitionsTer
10、ms defined in Terminology C1232 shallapply in this practice.4. Significance and Use4.1 This practice applies to 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 requirem
11、ents ofTMS 602-08 / ACI 530.1-08 / ASCE 6-08 and supplementsthose workmanship requirements with additional requirementsparticular to AAC masonry.1This practice is under the jurisdiction of ASTM Committee C15 on Manufac-tured Masonry Units and is the direct responsibility of Subcommittee C15.10 onAut
12、oclaved Aerated Concrete Masonry Units.Current edition approved Dec. 1, 2011. Published December 2011. Originallyapproved in 2009. Last previous edition approved in 2010 as C1692 10. DOI:10.1520/C1692-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Se
13、rvice 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.1*A Summary of Changes section appears at
14、the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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
15、AAC manufacturer.5.3 Mortar for thin-bed AAC masonry shall comply withSpecification C1660.NOTE 1In general, AAC manufacturers performance standards formortar for AAC masonry address minimum dry compressive strength,minimum wet compressive strength, minimum bond strength, minimumopen time, and minimu
16、m working time. They also require that the mortarprovide sufficient bond to the AAC masonry unit so that flexural 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 Te
17、st6.1 Compressive Strength Test for AAC MasonryReportthe compressive strength of the AAC masonry as the strengthof 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 monolit
18、hically. Thecompressive strength of anAAC prism depends on the prisms aspect ratioonly, and not on the presence, 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 eq
19、uations for AAC masonry are calibrated using compressivestrengths determined in accordance with Specification 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
20、.4 are not requiredby TMS 40208 / ACI 53009 / ASCE 508 or TMS 602-08 / ACI530.1-08 / ASCE 6-08. They may be 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,orC1
21、072.6.2.1 If conducting flexural strength tests in accordancewith Test Methods E518, construct at least five 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
22、 Test Methods E518, Test Method A (Simply SupportedBeam with Third-point Loading).6.2.2 If conducting flexural 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 com
23、plying with 5.2 or 5.3 asappropriate.6.3 Shear Strength Test for AAC Masonry AssemblagesIfrequired, conduct 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
24、 of Elasticity of AAC UnitsIf required, deter-mine the modulus of elasticity in accordance with SpecificationC1693.7. 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 p
25、ractice.7.2 Install the first course in a full bed of mortar conformingto Specification C270,TypeM,SorN.7.3 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-
26、08 / ACI 530.1-08 / ASCE 6-08(Part 3Execution) for laying solid units.7.6 Make minor adjustments by sanding 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
27、 grouting, to ensure that the grout flows to completely fillthe space to be grouted.8. Workmanship for Thin-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 co
28、urse in a full bed of mortar conformingto Specification C270,TypeM,SorN.8.3 Use thin-bed mortar complying 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 tosprea
29、d the thin-bed mortar so that it completely fills the bedjoints. Similarly fill the head joints, unless the 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 mortardr
30、ies. Set the units into final position, in mortar joints approxi-mately 0.06-in. (1.5-mm) thick, by striking 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
31、 reference. Make minor adjustments bysanding the surfaces of the units with a sanding board.8.7 If it is necessary to field-cut units, cut them totolerances consistent with 5.1.8.8 If AAC masonry is to be grouted, wet it thoroughlybefore grouting, to ensure that the grout flows to completely fillthe
32、 space to be grouted.9. Exterior Surface Treatment9.1 AAC masonry exposed to weather shall be protectedwith 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 T
33、est Methods E96/E96M, shallnot be less than 5.9.3 Liquid PermeabilityThe coating shall show no leak-age when tested using the following procedure:C1692 1129.3.1 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). M
34、ake the assemblage usingtwo pieces of AAC material with a vertically oriented jointbetween them. Join the 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 specim
35、en, over the joint, a clear glassor plastic measurement tube with an inside diameter between 2and 4 in. (50 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 th
36、e reference tube with water to a heightof 21.6 in. (0.55 m), within a tolerance of 61 in. (25 mm). Notethe 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 measure
37、ment tube, and in the reference tube. Ifthose differences differ by less than 1 mm, the coating shall beconsidered 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
38、water-penetration resistance of anAAC masonry system, tests such as Test Method E514 are appropriate.10. Keywords10.1 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/).C1692 114
