ASTM A951 A951M-2011 Standard Specification for Steel Wire for Masonry Joint Reinforcement《加固圬工接缝所用钢丝的标准规格》.pdf
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1、Designation: A951/A951M 11Standard Specification forSteel Wire for Masonry Joint Reinforcement1This standard is issued under the fixed designation A951/A951M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers masonry joint reinforcementfabricated from cold-drawn steel wire. Joint reinforcementconsists of longit
3、udinal wires welded to cross wires.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems
4、 may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2A82/A82M Specification for Steel Wire, Plain, for ConcreteReinforcementA152 Specification for Wrought Iron Rivets and RivetRounds3A185/A185M Specification for Steel Welded Wire Rein-forcement, Plain, for Concr
5、eteA496/A496M Specification for Steel Wire, Deformed, forConcrete ReinforcementA580/A580M Specification for Stainless Steel WireA641/A641M Specification for ZincCoated (Galvanized)Carbon Steel WireA1064/A1064M Specification for Steel Wire and WeldedWire Reinforcement, Plain and Deformed, for Concret
6、e3. Ordering Information3.1 It shall be the responsibility of the purchaser to specifyall requirements that are necessary for the manufacture anddelivery of the wire under this specification. Such requirementsto be considered include, but are not limited to, the following:3.1.1 Quantity (metres line
7、ar feet),3.1.2 Type (truss, ladder),3.1.3 Width (nominal thickness of masonry wall),3.1.4 Wire size and wire specification,3.1.5 Finish (see Section 6),3.1.6 Packaging (see Section 12), and3.1.7 ASTM designation number and year of issue.4. Materials and Manufacture4.1 Wire used in the manufacture of
8、 masonry joint rein-forcement shall be round and shaped and conform to theapplicable provisions of Specifications A82/A82M, A1064/A1064M,orA580/A580M, Type 304, except as modifiedherein.NOTE 1Specifications A82/A82M, A185/A185M, and A496/A496Mhave been replaced by Specification A1064/A1064M.4.2 Maso
9、nry joint reinforcement shall be assembled byautomatic machines or by other suitable mechanical means thatwill assure accurate spacing and alignment of all members ofthe finished product.4.3 Longitudinal and cross wires shall be securely con-nected at every intersection by an electric-resistance wel
10、dingprocess that includes both fusion welding together with appliedpressure to join the materials.4.4 Longitudinal wires shall be deformed. One set of twodeformations shall occur around the perimeter of the wire at amaximum spacing of 0.7 times the diameter or width of thewire, but not less than eig
11、ht sets per 25 mm 1 in. of length.NOTE 2Wire used for joint reinforcement is knurled to form defor-mations and as such it does not come under the deformation requirementsin Specifications A496/A496M or A1064/A1064M.5. Mechanical Requirements5.1 Tensile PropertiesWire used in the fabrication ofmasonr
12、y joint reinforcement shall conform to the requirementsof Table 1 based on nominal area of the wire.5.2 Tension Tests:5.2.1 Tension tests shall be made on individual wires cutfrom the finished product and tested either across or betweenthe welds. No less than 50 % shall be across welds.5.2.2 Tension
13、 tests across a weld shall have the welded jointlocated approximately at the center of the wire being tested.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.C
14、urrent edition approved Oct. 1, 2011. Published October 2011. Originallyapproved in 1996. Last previous edition approved in 2004 as A951/A951M 04.DOI: 10.1520/A0951_A0951M-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
15、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internati
16、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.3 Tensile strength shall be the average of four test valuesdetermined by dividing the maximum test load by the specifiednominal cross-sectional area of the wire.5.3 Reduction of AreaThe ruptured section of
17、the tensilespecimen is measured to determine this property. The measure-ment shall be made only when rupture has occurred at asufficient distance from the center of the weld to permit anaccurate measurement of the fractured section. Additionaltesting is permitted when a suitable ruptured section is
18、notobtained from the initial test. The wire shall meet the minimumreduction of area requirements of Table 1.5.4 Weld Shear StrengthThe weld shear strength in New-tons shall not be less than 172 multiplied by the nominal areain square millimetres or in pounds-force shall not be less than25 000 multip
19、lied by the specified nominal area of the largerwire in square inches.NOTE 3Since industry practice is to use butt welds in the manufactureof joint reinforcement, the weld shear strength in pounds-force isprescribed as 25 000 times the area of the larger wire rather than 35 000times the area of the
20、larger wire.5.5 Weld Shear Strength Tests:5.5.1 Test specimens shall be obtained from the finishedproduct by cutting a section of longitudinal wire that includesone weld.5.5.2 Weld shear strength tests shall be conducted using afixture of such design as to prevent rotation of the cross wire.The cros
21、s wire shall be placed in the anvil of the testing devicewhich is secured in the tensile machine and the load thenapplied to the longitudinal wire.5.5.3 Weld shear strength shall be the average test load inNewtons pounds of four test specimens selected at random.5.6 Bend Tests:5.6.1 Test specimens s
22、hall be obtained from the fabricatedproduct by cutting a section of longitudinal wire without welds.5.6.2 The test specimens shall be bent at room temperaturethrough 180 around a pin, the diameter of which is equal tothe nominal diameter of the specified wire. Shaped wires shallbe placed on the pin
23、so that the minimum dimension isperpendicular to the axis of the pin.5.6.3 The specimen shall not break nor shall there be visiblecracks of the base metal on the outside diameter of the bend.6. Other Requirements6.1 When corrosion protection of joint reinforcement isprovided, it shall be in accordan
24、ce with one of the following:6.1.1 Mill GalvanizedZinc coated, in accordance with thehot-dip method of Specification A641/A641M, with a mini-mum of 30 g/m20.1 oz per ft2 of surface area. It shall bepermissible to apply the coating before fabrication.6.1.2 Hot-Dip GalvanizedZinc coated, by the hot-di
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