1、Standard Specification for Steel Wire, Plain, for Concrete Reinforcement AASHTO Designation: M 32M/M 32-09 (2013) ASTM Designation: A82/A82M-07 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4g M 32M/M 32-1 AASHTO
2、 Standard Specification for Steel Wire, Plain, for Concrete Reinforcement AASHTO Designation: M 32M/M 32-09 (2013) ASTM Designation: A82/A82M-07 1. SCOPE 1.1. This specification covers cold-drawn steel wire, as drawn or galvanized, to be used as such or in fabricated form, for the reinforcement of c
3、oncrete, in sizes not less than 2.03 mm 0.080 in. nominal diameter. 1.2. Supplement S1 describes high-strength wire, which shall be furnished when specifically ordered. It shall be permissible to furnish high-strength wire in place of regular wire if mutually agreed to by the purchaser and the manuf
4、acturer. 1.3. The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in noncon
5、formance with the standard. (The inch-pound units are shown in brackets except in Table 6.) 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 55M/M 55, Steel Welded Wire Reinforcement, Plain, for Concrete T 244, Mechanical Testing of Steel Products 2.2. ASTM Standards: A641/A641M, Standard Specificat
6、ion for Zinc-Coated (Galvanized) Carbon Steel Wire A700-05, Standard Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment (withdrawn 2014) E83, Standard Practice for Verification and Classification of Extensometer Systems 2.3. Military Standard: MIL-STD-129, Marking
7、for Shipment and Storage 2.4. Federal Standard: Fed. Std. No. 123, Marking for Shipments (Civil Agencies) 2.5. Other Standard: ACI 318, Building Code Requirements for Structural Concrete 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication i
8、s a violation of applicable law.TS-4g M 32M/M 32-2 AASHTO 3. ORDERING INFORMATION 3.1. It shall be the responsibility of the purchaser to specify all requirements that are necessary for the manufacture and delivery of the wire under this specification. Such requirements to be considered include, but
9、 are not limited to, the following: 3.1.1. Quantity (mass) weight, 3.1.2. Name of material (cold-drawn steel wire for concrete reinforcement), 3.1.3. Wire size number (see Section 8), 3.1.4. Yield strength measurement (see Sections 5.1 and 11.3), 3.1.5. Packaging (see Section 15), 3.1.6. AASHTO desi
10、gnation and year of issue, and 3.1.7. Special requirements, if any (see Supplement S1). Note 1A typical ordering description is as follows: 50 000 kg 100,000 lb cold-drawn steel wire for concrete reinforcement, size No. W5 in 800 kg 2000 lb secured coils, to M 32M/M 32-_. 4. MATERIALS AND MANUFACTUR
11、E 4.1. The steel shall be made by one or more of the following processes: open hearth, electric furnace, or basic oxygen. 4.2. The wire shall be cold drawn from rods that have been hot rolled from billets. 4.3. Unless otherwise specified, the wire shall be supplied uncoated. When specified as galvan
12、ized, it shall be galvanized at finish size. 5. MECHANICAL PROPERTY REQUIREMENTS 5.1. Tension Tests: 5.1.1. When tested as described in T 244, the material, except as specified in Section 5.1.2, shall conform to the tensile property requirements in Table 1, based on nominal area of wire. Table 1Tens
13、ion Test Requirements Tensile strength, min MPa ksi 550 80 Yield strength, min MPa ksi 485 70 Reduction of area, min % 30aaFor material testing over 690 MPa 100 ksi tensile strength, the reduction of area shall be not less than 25 percent. 2015 by the American Association of State Highway and Transp
14、ortation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4g M 32M/M 32-3 AASHTO 5.1.2. When required by the purchaser, yield strength shall be determined as described using a Class B-1 extensometer described in ASTM E83. The yield strength shall be determined as descri
15、bed in T 244 at an extension under load of 0.5 percent of gauge length. It shall be permissible to remove the extensometer after the yield strength has been determined. The wire shall meet the requirements of Table 1 or Table 2, whichever is applicable. 5.1.3. For material to be used in the fabricat
16、ion of welded wire reinforcement, the tensile and yield strength properties shall conform to the requirements given in Table 2, based on nominal area of the wire. Table 2Tension Test Requirements Material for Welded Wire Reinforcement Size MW7.7 W1.2 and Larger Smaller than Size MW7.7 W1.2 Tensile s
17、trength, min MPa ksi 515 75 485 70 Yield strength, min MPa ksi 450 65 385 56 Reduction of area, min % 30a30aaFor material testing over 690 MPa 100 ksi tensile strength, the reduction of area shall be not less than 25 percent. 5.1.4. The material shall not exhibit a definite yield point as evidenced
18、by a distinct drop of the beam or halt in the gauge of the testing prior to reaching ultimate tensile load. 5.2. Bend TestsThe bend-test specimen shall stand being bent at room temperature through 180 degrees without cracking on the outside of the bent portion, as prescribed in Table 3. Table 3Bend-
19、Test Requirements Size Number of Wire Bend Test MW45 W7 and smaller Bend around a pin the diameter of which is equal to the diameter of the specimen. Larger than MW45 W7 Bend around a pin the diameter of which is equal to twice the diameter of the specimen. 5.3. Reduction of Area TestThe reduction o
20、f area shall be determined as described in T 244, and the wire shall conform to the reduction of area requirements in Table 1 and Table 2. 6. PERMISSIBLE VARIATION IN WIRE DIAMETER 6.1. The permissible variation in the diameter of the wire shall conform to the requirements in Table 4. 6.2. The diffe
21、rence between the maximum and minimum diameters, as measured on any given cross section of the wire, shall not exceed the tolerances listed in Table 4 for the given wire size. Table 4Permissible Variation in Wire Diameter Size Number Nominal Diameter, mm in. Permissible Variation Plus and Minus, mm
22、in. Smaller than MW32 W5 under 6.40 0.252 0.08 0.003 MW32 W5 to MW77 W12, incl 6.40 0.252 to 9.93 0.391, incl 0.10 0.004 Over MW77 W12 to MW129 W20, incl over 9.93 0.391 to 12.83 0.505, incl 0.15 0.006 Over MW129 W20 over 12.83 0.505 0.20 0.008 2015 by the American Association of State Highway and T
23、ransportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4g M 32M/M 32-4 AASHTO 7. WORKMANSHIP, FINISH, AND APPEARANCE 7.1. The wire shall be free of detrimental imperfections and shall have a workmanlike finish. 7.2. Galvanized wire shall be produced as described
24、 in ASTM A641/A641M, regular coating. 7.3. Rust, surface seams, or surface irregularities shall not be a cause for rejection provided the requirements of Section 7.4 are met; and the minimum dimensions and mechanical properties of a hand wire-brushed test specimen are not less than the requirements
25、of this specification. 7.4. Wire intended for welded wire reinforcement shall be sufficiently free of rust and drawing lubricant so as not to interfere with electric resistance welding. 8. GENERAL REQUIREMENTS 8.1. When wire for concrete reinforcement is ordered by size number, the relations between
26、 size number, diameter, and area shown in Table 5 and Table 6 shall apply. Table 5Dimensional Requirements for Plain WireSI Units Wire Sizes Size NumberaNominal Diameter mm in. Nominal Area mm2in.2 MW 5 2.52 0.099 5 0.008 MW 10 3.57 0.140 10 0.016 MW 15 4.37 0.172 15 0.023 MW 20 5.05 0.199 20 0.031
27、MW 25 5.64 0.222 25 0.039 MW 30 6.18 0.243 30 0.047 MW 35 6.68 0.263 35 0.054 MW 40 7.14 0.281 40 0.062 MW 45 7.57 0.298 45 0.070 MW 50 7.98 0.314 50 0.078 MW 55 8.37 0.329 55 0.085 MW 60 8.74 0.344 60 0.093 MW 65 9.10 0.358 65 0.101 MW 70 9.44 0.372 70 0.109 MW 80 10.10 0.397 80 0.124 MW 90 10.70 0
28、.421 90 0.140 MW 100 11.30 0.444 100 0.155 MW 120 12.40 0.487 120 0.186 MW 130 12.90 0.507 130 0.202 MW 200 16.00 0.628 200 0.310 MW 290 19.20 0.757 290 0.450 aTable 1 represents a hard metrication of the most readily available size in the welded wire reinforcement industry. Table 5 should be used i
29、n projects that are designed using SI units. Table 6 should be used in projects designed using inch-pound units. Areas of wire should be checked with the most efficient and readily available material from producers. Other wire sizes are available, and many manufacturers can produce them in 1-mm20.00
30、15-in.2 increments. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4g M 32M/M 32-5 AASHTO Table 6Dimensional Requirements for Plain WireInch-Pound Units Wire Sizes Size NumberaNominal Diameter, in. m
31、m Nominal Area, in.2mm2 Size Number Nominal Diameter, mm in. Nominal Area mm2in.2 W0.5 0.080 2.03 0.005 3.23 W11 0.374 9.50 0.110 71.00 W1.2 0.124 3.14 0.012 7.74 W12 0.391 9.93 0.120 77.40 W1.4 0.134 3.39 0.014 9.03 W14 0.422 10.70 0.140 90.30 W2 0.160 4.05 0.020 12.90 W16 0.451 11.50 0.160 103.00
32、W2.5 0.178 4.53 0.025 16.10 W18 0.479 12.20 0.180 116.00 W2.9 0.192 4.88 0.029 18.70 W20 0.505 12.80 0.200 129.00 W3.5 0.211 5.36 0.035 22.60 W22 0.529 13.40 0.220 142.00 W4 0.226 5.73 0.040 25.80 W24 0.553 14.00 0.240 155.00 W4.5 0.239 6.08 0.045 29.00 W26 0.575 14.60 0.260 168.00 W5 0.252 6.41 0.0
33、50 32.30 W28 0.597 15.20 0.280 181.00 W5.5 0.265 6.72 0.055 35.50 W30 0.618 15.70 0.300 194.00 W6 0.276 7.02 0.060 38.70 W31 0.628 16.00 0.310 200.00 W8 0.319 8.11 0.080 51.60 W45 0.757 19.20 0.450 290.00 W10 0.357 9.06 0.100 64.50 aThis table represents the most recently available sizes in the weld
34、ed wire enforcement industry in sizes using inch-pound units. Areas of wire should be checked with the most efficient and readily available material from producers. Other wire sizes are available, and many manufacturers can produce them in 0.0015-in.2increments. 9. SAMPLING 9.1. Test specimens for t
35、esting mechanical properties shall be full wire sections and shall be obtained from ends of wire coils as drawn or as galvanized. The specimens shall be of sufficient length to perform testing described in Sections 5.1 and 5.2. 9.2. If any test specimen exhibits obvious isolated imperfections that a
36、re not representative of the product, it may be discarded and another specimen substituted. 10. NUMBER OF TESTS 10.1. One tension and one bend test shall be made from each 9000 kg 10 tons or less of each size of wire or fraction thereof in a lot or a total of seven samples, whichever is fewer. A lot
37、 shall consist of all the coils of a single size offered for delivery at the same time. 11. INSPECTION 11.1. The inspector representing the purchaser shall have free entry at all times while work on the contract of the purchaser is being performed, to all parts of the manufacturers works that concer
38、n the manufacture of the material ordered. The manufacturer shall afford the inspector all reasonable facilities to assure him or her that the material is being furnished in accordance with this specification. 11.2. Except for yield strength, all tests and inspection shall be made at the place of ma
39、nufacture prior to shipment, unless otherwise specified. Such tests shall be so conducted as not to interfere unnecessarily with the operation of the works. 11.3. The purchaser shall have the option to require a yield strength measurement to determine compliance with yield strength requirements in S
40、ection 5.1 and shall specify that the measurement 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4g M 32M/M 32-6 AASHTO be performed by the manufacturer at the manufacturers facilities, a recognized
41、laboratory, or the purchasers representative at the manufacturers facilities. Such measurements shall be conducted without unnecessarily interfering with the manufacturing operations. 11.4. For U.S. Government Procurement OnlyExcept as otherwise specified in the contract, the contractor is responsib
42、le for the performance of all inspection and test requirements specified herein. Except as otherwise specified in the contract, the contractor may use his or her own or any other suitable facilities for the performance of the inspection and test requirements specified herein, unless disapproved by t
43、he purchaser at the time of purchase. The purchaser shall have the right to perform any of the inspections and tests at the same frequency as set forth in this specification where such inspections are deemed necessary to ensure that material conforms to prescribed requirements. 12. REJECTION 12.1. M
44、aterial that shows detrimental imperfections subsequent to its acceptance at the manufacturers works will be rejected, and the manufacturer shall be notified. 12.2. Failure of any of the test specimens to comply with the requirements of this specification shall constitute grounds for rejection of th
45、e lot represented by the specimen. 12.3. Any rejection based on tests made in accordance with the specification shall be reported to the manufacturer within two weeks of the date of inspection or test. The material must be adequately protected and correctly identified in order that the producer may
46、make a proper investigation. 13. REHEARING 13.1. Rejected materials shall be preserved for a period of at least two weeks from the date of inspection, during which time the manufacturer shall have the option to make claim for a rehearing and retesting. 13.2. The manufacturer shall have the option to
47、 resubmit the rejected lot for reinspection or retesting by inspecting or testing every coil for the property in which the test specimen failed and sorting out nonconforming coils. 14. CERTIFICATION 14.1. When specified in the purchase order or contract, the purchaser shall be furnished with the man
48、ufacturers written certification that the material was manufactured, sampled, tested, and inspected in accordance with, and meets the requirements of, this specification. When specified in the purchase order or contract, a report of the test results shall be furnished. The certification shall include the specification number, year-date of issue, and revision letter, if any. 14.2. A material test report, certificate of inspection, or similar document printed from or used in electronic form from an electronic data interchange (EDI) transmission shall be regarded
