ASTM C1694-2009 Standard Specification for Reinforced Autoclaved Aerated Concrete (AAC) Elements《增强热压加气混凝土(AAC)构件的标准规范》.pdf

1、Designation: C1694 09Standard Specification forReinforced Autoclaved Aerated Concrete (AAC) Elements1This standard is issued under the fixed designation C1694; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi

2、on. 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 reinforced solid elementsmanufactured from autoclaved aerated concrete (AAC), acementitious product add

3、ressed by Specification C1693. Thespecification addresses dimensional tolerances, maximum lim-its for drying shrinkage, requirements for steel reinforcement,and shipping and handling.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathemat

4、icalconversions to SI units that are provided 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 and health

5、 practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A82/A82M Specification for Steel Wire, Plain, for ConcreteReinforcementC1693 Specification for Autoclaved Aerated Concrete(AAC)3. Classification3.1 Reinforced AAC elements ma

6、nufactured in accordancewith this specification shall be classified according to theirstrength class.4. Materials and Manufacture4.1 Reinforced AAC elements manufactured in accordancewith this specification shall be composed entirely of AACmaterial conforming to Specification C1693.5. Physical Requi

7、rements5.1 Compressive StrengthThe compressive strength of theelements shall be determined according to SpecificationC1693, and shall conform to the requirements of SpecificationC1693 for the strength class in which the elements areclassified.5.2 Dry Bulk DensityThe dry bulk density shall be deter-m

8、ined according to Specification C1693, and shall conform tothe requirements of Specification C1693 for the strength classin which the elements are classified.5.3 Drying ShrinkageThe drying shrinkage shall be de-termined in accordance with Specification C1693, and theaverage drying shrinkage shall co

9、nform to the requirements ofSpecification C1693 for the strength class in which theelements are specified.5.4 Steel ReinforcemenThe properties of the steel rein-forcement shall be determined in accordance with SpecificationA82/A82M and shall conform to the requirements of Table 1.5.5 Weld-Point Shea

10、r StrengthThe weld-point shearstrength in the reinforcement shall be determined in accordancewith Section 8 and shall conform to the requirements of Table2.5.6 Concrete Cover of Steel ReinforcementThe minimumconcrete cover over the steel reinforcement shall be 0.375 in.(10 mm). The reinforcing steel

11、 shall receive a corrosion-resistant coating before casting.NOTE 1Acover greater than 0.375 in. (10 mm) may be required in fireresistant applications.5.7 Effectiveness of Corrosion Protection of SteelReinforcementThe effectiveness of the corrosion protectionfor the steel reinforcement shall be deter

12、mined according toSection 7, and the resulting percentage of surface area that iscorroded shall not exceed 5 % of the total surface area.6. Dimensions and Permissible Variations6.1 The dimensions of the reinforced elements shall be asspecified by theAAC manufacturer.Allowable deviations fromthe spec

13、ified element dimensions are provided in Table 3.1This specification is under the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.60 onPrecast Autoclaved Aerated Concrete.Current edition approved Oct. 1, 2009. Published November 2009

14、. DOI:10.1520/C1694-09.2For 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 Bar

15、r Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Corrosion Protection of Steel Reinforcement in AAC7.1 Apparatus:7.1.1 Storage Container, with dimensions sufficient to com-pletely immerse AAC specimens.7.2 Test SpecimensA test set shall consist of six testspecimens hav

16、ing the dimensions 16 in. (400 mm) by width ofthe reinforced element by thickness of the reinforced element.The exposed surface areas of the steel reinforcement at eachend of the test specimen shall be coated with the corrosion-protection compound and allowed to dry before testing. Threespecimens ar

17、e to be kept as reference specimens, and threespecimens shall be tested.7.3 Procedure:7.3.1 Reference SpecimensStore the reference specimensin a room having a temperature of 59 to 68F (15 to 20C) anda relative humidity of 50 to 70 %.7.3.2 Test SpecimensImmerse the test specimens in anaqueous sodium

18、chloride solution, 3 % sodium chloride (NaCl)by mass, for periods of2hatintervals of three days. Repeat fora total of ten test cycles. When the specimens are not immersedin the sodium chloride solution, store them under the sameconditions as the reference specimens.After completing the tentesting cy

19、cles, allow the specimens to air dry for 4 h.7.3.3 Inspection for RustAfter completing the testingprocedure, remove the autoclaved aerated concrete around thesteel reinforcement in the reference specimen and the testspecimens. By visual inspection, determine the area of rustcovering the steel and ex

20、press that area as a percentage of thetotal area of the specimen, using the following calculation:At5pn1d1l11pn2d2l2mm2! (1)Ar5 ( wilimm2! (2)Pr5 100 Ar/At! (3)where:At= total surface of reinforcement present in the specimen(mm2)n1= number of longitudinal reinforcing rods,d1= diameter of the longitu

21、dinal reinforcing rods (mm),l1= length of the longitudinal reinforcing rods (mm),n2= number of transverse reinforcing rods,d2= diameter of transverse reinforcing rods (mm),l2= length of the transverse reinforcing rods (mm),Ar= area of rusted surface,wi= unrolled width of the corroded surface,li= len

22、gth of the corroded surface, andPr= percentage of surface area which is rusted.The total area of corroded surface shall be reported as theaverage total area for the three test and the three referencespecimens.8. Weld-Point Shear Strength8.1 ApparatusPerform this test using the device shown inFig. 1

23、or an equivalent device that can be fitted into a normaltension testing machine.8.2 SpecimenUse a specimen of the shape shown in Fig.2. Take specimens at random from welded mats of reinforce-ment that have not been coated with a corrosion-resistantcompound. The bar with the largest diameter shall be

24、 selectedas the test specimen. Do not fabricate special test specimens forthis test, except for initial qualification of the welding device.8.3 ProcedureGrip the specimen in the test fixture so thatthe tension bar is centrally located and rotation of the anchor-ing bar is prevented. Load at a rate n

25、ot exceeding 112 lbf/s (0.5kN/s).8.4 Test ResultsReport the following:8.4.1 Nominal steel quality.8.4.2 Diameter of the longitudinal bar (tensioned bar).8.4.3 Diameter of the transverse bar (anchoring bar).8.4.4 Ultimate shear force.9. Shipping and Handling of Reinforced AAC Elements9.1 Protect rein

26、forced AAC elements from damage duringshipping by placement on pallets or other supports, banding ofthe elements, placement of material between the elements, orany other method deemed appropriate by the AAC manufac-turer. Handle reinforced AAC elements using lifting devices orclamps recommended by t

27、he AAC manufacturer.10. Visual Inspection10.1 All elements shall be sound and free of defects thatwould interfere with the proper placement of the unit or impairthe strength or permanence of the construction. Minor imper-fections incidental to the usual methods of manufacture, orresulting from custo

28、mary methods of handling in shipment anddelivery, shall not be deemed grounds for rejection.TABLE 1 Properties of Steel ReinforcementProperty Minimum Characteristic ValueYield strength, min, ksi (MPa) 70 (485)Tensile strength, min, ksi (MPa) 80 (550)Reduction of area, min, % 30AAFor material testing

29、 over 100 ksi (690 MPa) tensile strength, the reduction ofarea shall be not less than 25 %.TABLE 2 Weld-Point Shear Strength for Steel ReinforcementDiameter of theLongitudinal Reinforcement, in. (mm)Minimum Shear Strengthof the Joint, lbf (kN)0.16 (4.0) 495 (2.20)0.18 (4.5) 598 (2.66)0.20 (5.0) 771

30、(3.43)0.24 (6.0) 1113 (4.95)0.28 (7.0) 1513 (6.73)0.32 (8.0) 1987 (8.84)0.35 (9.0) 2502 (11.13)0.40 (10.0) 3091 (13.75)0.43 (11.0) 3741 (16.64)0.47 (12.0) 5339 (19.79)TABLE 3 Dimensional Tolerances for Reinforced AAC ElementsDimension Floor, Roof, and Wall PanelsLength 60.20 in. (65 mm)Width 60.12 i

31、n. (63 mm)Thickness 60.12 in. (63 mm)Tongue/groove alignment 60.12 in. (63 mm)C1694 09211. Sampling and Testing11.1 The purchaser or his authorized representative shall beaccorded proper facilities to inspect and sample the elements atthe place of manufacture from the lots ready for delivery.11.2 Th

32、e elements shall be sampled and tested in accor-dance with test methods of this specification.12. Rejection and Rehearing12.1 If the shipment fails to conform to the specific require-ments, the manufacturer shall be permitted to sort it, and newspecimens shall be selected by the purchaser from the r

33、etainedlot and tested at the expense of the manufacturer. If the secondFIG. 1 Weld-Point Shear Strength Test ApparatusFIG. 2 Weld-Point Shear Strength Test SpecimensC1694 093set of specimens fails to conform to the test requirements, theentire lot shall be rejected.13. Expense of Tests13.1 Except as

34、 specified in Section 12, and unless otherwiseagreed, the expense of inspection and testing shall be borne bythe purchaser.14. Precision and Bias14.1 The precision and bias of the test procedures describedin Section 8, Section 9, and Section 10 are being determinedand will be provided when sufficien

35、t data are available toindicate acceptable tolerances in repeatability and reproduc-ibility.15. Keywords15.1 autoclaved aerated concrete (AAC); compressivestrength; density; reinforced elements; reinforcementASTM International takes no position respecting the validity of any patent rights asserted i

36、n 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 the r

37、esponsible 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 car

38、eful 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 Internation

39、al, 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).C1694 094