1、Designation: C1692 09Standard 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 Method for Measurement of Masonry FlexuralBond StrengthC1232 Terminology of MasonryC1691 Specification for Unreinforced Autoclaved AeratedConcrete (AAC) Masonry UnitsC1693 Specification for Autoclaved Aerated Concrete(AAC)E72 Test Meth
8、ods of Conducting Strength Tests of Panelsfor Building ConstructionE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE514 Test Method for Water Penetration and LeakageThrough MasonryE518 Test Methods for Flexural Bond Strength of MasonryE519 Test Method for Diagonal Tension (Shear) in Ma
9、sonryAssemblages2.2 Other Standard:TMS 602-08 / ACI 530.1-08 / ASCE 6-08 Specification forMasonry Structures33. Terminology3.1 DefinitionsTerms 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-densi
10、ty ce-mentitious 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 and are retained in the matrix on setting, ha
11、rdening,and subsequent high-pressure steam curing, to produce acellular structure. Material specifications for this product areprescribed in Specification C1693.3.2.2 thick-bed AAC masonryAAC masonry whose mor-tar joints are approximately 0.38-in. (10-mm) thick.1This practice is under the jurisdicti
12、on of ASTM Committee C15 on Manufac-tured Masonry Units and is the direct responsibility of Subcommittee C15.10 onAutoclaved Aerated Concrete Masonry Units.Current edition approved July 1, 2009. Published November 2009. DOI:10.1520/C1692-09.2For referenced ASTM standards, visit the ASTM website, www
13、.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.3Available from The Masonry Society, 3970 Broadway, Suite 201-D Boulder,CO 803041135, http:/www.masonrysociety.org.1Copy
14、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.3 thin-bed AAC masonryAAC masonry whose mortarjoints are approximately 0.06-in. (1.5-mm) thick.4. Significance and Use4.1 This practice applies to the materials and methods usedin the co
15、nstruction 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 requirementsparticular to AAC masonry.5. Mat
16、erials5.1 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 meet the per-formance standards prescribed by the AAC manufacturer.NOTE 1In general, A
17、AC 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 flex
18、ural 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 stren
19、gthof 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 presen
20、ce, 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 Specification
21、 C1693.Itistherefore appropriate to report those same strengths, which SpecificationC1693 requires AAC manufacturers to determine and report.6.2 Flexural Strength Test for AAC MasonryAssemblagesIf required, conduct flexural strength tests inaccordance with Test Methods E72, E518,orC1072.6.2.1 If con
22、ducting 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 Test Methods E5
23、18, 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 meeting the perform
24、ancerequirements of the AAC manufacturer.NOTE 3Until a relationship is developed between full panel tests (TestMethods E72) and small-scale test specimens (Test Methods E518 andC1072) for AAC masonry, Test Methods E72 should be used to establishdesign stresses.6.3 Shear Strength Test for AAC Masonry
25、 AssemblagesIfrequired, conduct shear strength tests in accordance with TestMethod E519. Cure the gypsum capping material for at leastsix hours prior to testing.6.4 Modulus of Elasticity of AAC UnitsIf required, deter-mine the modulus of elasticity in accordance with SpecificationC1693.7. Workmanshi
26、p 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.7.3 Use thick-bed mortar
27、 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 sanding the surfaces of theu
28、nits 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 Thin-bed AAC Masonry8.1 W
29、orkmanship 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 with 5.3.8.4 Mix thin-
30、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 the units aredesigned to
31、 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 striking on the end and topo
32、f 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 necessary to field-cut
33、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 space to be grouted.C1692 0929. Exterior Surface Treatment9.1 AAC masonry exposed to weather shall be protectedwith an exterior
34、 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 leak-age when tested usi
35、ng 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 two pieces at the join
36、t 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. (50 and 100 mm), and a h
37、eight 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 original height of wa
38、ter, 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 beconsidered to have shown
39、 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. Keywords10.1 autoclaved
40、 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).FIG. 1 Masonry Assemblage for Testing Liquid Permeability of Exterior Surface Treatment for AAC MasonryC1692 093
