《AS NZS 4672.2-2007 Steel prestressing materials Part 2 Testing requirements.pdf》由会员分享，可在线阅读，更多相关《AS NZS 4672.2-2007 Steel prestressing materials Part 2 Testing requirements.pdf（21页珍藏版）》请在三一文库上搜索。
1、 AS/NZS 4672.2:2007 Australian/New Zealand Standard Steel prestressing materials Part 2: Testing requirements AS/NZS 4672.2:2007 Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 AS/NZS 4672.2:2007 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee BD-084,
2、 Steel Reinforcing and Prestressing Materials. It was approved on behalf of the Council of Standards Australia on 14 August 2006 and on behalf of the Council of Standards New Zealand on 9 June 2006. This Standard was published on 18 January 2007. The following are represented on Committee BD-084: AU
3、STROADS Association of Consulting Engineers Australia Australian Chamber of Commerce and Industry Australian Post Tensioning Association Australian Steel Association Australian Wire Industry Association Bureau of Steel Manufacturers of Australia Business New Zealand Cement produced by the same feed
4、material, process, equipment and conditions in a continuous production run. 4.3 Unit of product A quantity of product comprising a subdivision of a unit of manufacture, not exceeding 3.5 t of wire or strand or 15 t of bar, generally in the form as delivered to the customer. Accessed by TAFE NSW - NO
5、RTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing 5 AS/NZS 4672.2:2007 COPYRIGHT TABLE 1 DEFINING OR LIMITING QUANTITY MATERIAL Type of product Unit of manufacture Unit of product Wire The wire product from one or more rod coil, produced by the same feed material,
6、process, equipment and conditions in a continuous operation, to a maximum of 50 t A smaller coil cut from a unit of manufacture, the maximum mass being the product of one rod coil Strand The product of one set of coils of wire placed in the stranding machine also known as a mother coil A coil cut fr
7、om a single mother coil Bar The quantity of bars of the same nominal diameter and technical class from the same steel heat manufactured at the same time A maximum of 15 tonnes of bar from the same unit of manufacture 5 REQUIREMENTS 5.1 Test piece Unless otherwise agreed, test specimens shall be take
8、n from finished product before packaging. Special care shall be taken when sampling packaged product (e.g., coil or bundle), in order to avoid plastic deformation, which could change the properties of the sample used to provide the test pieces. Samples to be taken shall permit the determination of g
9、eometrical, mechanical and special properties of each size and type of product. The size and length of test pieces shall conform to the requirements of AS/NZS 4672.1 and shall not be subjected to any post-production treatment that will unduly affect the test result. 5.2 Testing of properties Testing
10、 for tensile properties for compliance with this Standard shall be in accordance with the procedures of AS 1391 and AS/NZS 4672.1. 6 NOTATION The following symbols are used in this Standard: Agt = specified minimum value of the percentage total elongation at maximum force when tested in accordance w
11、ith AS 1391 E = modulus of elasticity K = a statistical factor k = acceptability index n = number of test results nup = number of test values determined in a unit of product nP = number of test values determined in a number of units of product u X = mean of individual test values determined in a par
12、ticular unit of product p X = mean of individual test values determined in a number of units of products xn = mean value of characteristic strength for n number of test pieces xs = an individual test value Rm = characteristic minimum breaking force or tensile strength Accessed by TAFE NSW - NORTH CO
13、AST INSTITUTE on 06 Oct 2007 AS/NZS 4672.2:2007 6 COPYRIGHT Re0.1 = 0.1% proof force Re0.2 = 0.2% proof force s = estimated standard deviation of the population sn = standard deviation of n test pieces 7 SAMPLING AND TESTING FREQUENCY Prestressing steel shall be sampled and tested for the relevant p
14、arameters specified in AS/NZS 4672.1, as appropriate. The minimum frequency of sampling and testing for each of the quality parameters where specified and determined in accordance with this Standard are summarized in Tables 2 to 5. The chemical composition of the steel, expressed as a percentage by
15、mass of sulphur and phosphorus, shall be determined for cast analysis from which a test specimen is taken. NOTE: Upon request, compliance with AS/NZS 4672.1 may be demonstrated by presentation of the relevant test certificate or certificate of compliance from the steel producer. TABLE 2 MINIMUM FREQ
16、UENCY OF SAMPLING AND TESTING WIRE Property Frequency of sampling and testing Maximum or breaking force Visual inspection of tensile test fracture Diameter (for plain wire) Indentation (for indented wire) One test per unit of product Mass per metre (for indented wire) One test per 5 units of product
17、 0.1% characteristic proof force Total percentage elongation at maximum force Reverse bend test One test per 5 units of product Relaxation In accordance with Table 3 and at least one 1000 h test per product per annum Straightness, rib height One test every 10 units of product Fatigue As agreed (see
18、Clause 1.6.5 of AS/NZS 4672.1) but, if required, not less than one test per product per year NOTE: Only rib heights or indentation depths to be measured for each unit of product, with circumferential gap and transverse rib spacing or indentation spacing to be measured at each roll change or adjustme
19、nt. TABLE 3 MINIMUM TESTING FREQUENCY OF RELAXATION TESTING Production run duration Minimum No. of tests per product per production line Location of test piece (approx.) Less than 4 weeks 1 per 2 runs At 5% to 10% from start of run More than 4 weeks but less than 13 weeks 1 per run At 5% and 50% fro
20、m start of run More than 13 weeks but less that 26 weeks 2 per run At 5%, 50% and 95% from start of run More than 26 weeks 4 per run per calendar yearAt approximately 8 weekly intervals Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing 7 AS
21、/NZS 4672.2:2007 COPYRIGHT TABLE 4 MINIMUM FREQUENCY OF SAMPLING AND TESTING STRAND Property Frequency of sampling and testing Maximum or breaking force 0.1% characteristic proof force Total percentage elongation at maximum force Straightness Visual inspection of tensile test fracture Diameter A tes
22、t from the beginning and end of a unit of manufacture and one further test from every 3 coils from the same unit of manufacture Relaxation In accordance with Table 3 and at least one 1000 h test per product per annum Fatigue As agreed (see Clause 1.6.5 of AS/NZS 4672.1) but, if required, not less th
23、an one tests per product per year Mass per length A test from the beginning and end of a unit of manufacture Mass per length (for indented strand) One test per unit of manufacture. At least 3 tests pieces per test Pitch or lay length One test per production run. At least 2 tests pieces per test Diam
24、eter relationship of core wire to outer wire (plain and indented 7 wire strand only) One test per unit of manufacture NOTE: The bend test is not applicable to strand. TABLE 5 MINIMUM FREQUENCY OF SAMPLING AND TESTING OF BAR Property Frequency of sampling and testing Maximum or breaking force 0.1% ch
25、aracteristic proof force Rib or thread height Total percentage elongation at maximum force Visual inspection of tensile test fracture Mass per metre (for threaded bars) One test per unit if product Bend test Two tests per unit of manufacture Relaxation In accordance with Table 3 and at least one 100
26、0 h test per product per annum Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 AS/NZS 4672.2:2007 8 COPYRIGHT TABLE 6 SUMMARY OF TEST PARAMETERS Parameter As-drawn (mill coil) wire Stress- relieved wire Quenched and tempered wire Strand Bars Crimped wire Chemistry Yes Yes Yes Yes Yes Yes
27、 Mechanical Max tensile Rm Yes Yes Yes Yes Yes Yes Proof stress Re0.1 or Re0.2 Yes Yes Yes Yes Yes Uniform elongation Agt Yes Yes Yes Yes Yes Modulus of elasticity (E) Yes Yes Yes Yes Ductility (bend test) Yes Yes Yes Optional Relaxation Yes Yes Yes Yes Yes Fatigue Optional Optional Optional Optiona
28、l Optional Dimensional Mass/length Yes Yes Yes Yes Yes Yes Straightness Yes Yes Yes Pitch Yes Yes Surface geometry Optional Optional Optional Yes 8 EVALUATION AND CONFORMANCE OF UNIT OF MANUFACTURE QUALITY PARAMETERS 8.1 Tensile parameters 8.1.1 Unit of manufacture parameters The value of each of th
29、e tensile parameters Rm Re0.1, Re0.2, Agt and E for a unit of manufacture shall be taken as the mean () up Xof the individual test values (xs) from the samples from the unit of product as follows: upsup /nxX= 8.1.2 Unit of manufacture conformance A unit of manufacture may be deemed to conform to the
30、 tensile parameters specified in this Standard, if the following are satisfied: (a) For Rm: mupm 13 . 1 02. 1RXR 1.753, the testing shall continue. Forty-five further test specimens shall be taken and tested from different units of production, so that a total of 60 test results are available (n = 60
31、). The unit of manufacture may be deemed to comply with this Australian/New Zealand Standard if m6060 671. 1RsX . . . 12.4.1(3) and all the test values for Agt are equal to or exceed the specified percentage total elongation at maximum force. 12.4.2 Inspection by attributes When testing the properti
32、es listed in Clause 12.3(b), either one of the following applies: (a) All the results determined on the 15 test specimens shall conform to this Standard. (b) If a maximum of two of the 15 results do not conform to this Standard, 45 further test specimens shall be taken and tested from different item
33、s in the test unit, making 60 test results available. The unit shall be deemed to conform to this Standard if no more than two of the 60 test specimens fail the test. 12.4.3 Relaxation test The production unit shall be deemed to conform with the relaxation requirement if the 1000 h relaxation value
34、is less than the specified value of the relevant section. Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing 13 AS/NZS 4672.2:2007 COPYRIGHT 12.5 Test report A test report shall be produced, which shall include the following data: (a) The ma
35、nufacturers name or trademark. (b) The nominal diameter of the prestressing steel. (c) The type, strength grade, and ductility and relaxation class of the prestressing steel. (d) The marking on the prestressing steel. (e) The batch number. (f) The date of testing. (g) The mass of the test unit. (h)
36、The individual test results for all the properties specified in Clause 12.3. Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 AS/NZS 4672.2:2007 14 NOTES Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing 15 AS/NZS 4672.2:2007 NOT
37、ES Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 AS/NZS 4672.2:2007 16 NOTES Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing Standards Australia Standards Australia is an independent company, limited by guarantee, which prep
38、ares and publishes most of the voluntary technical and commercial standards used in Australia. These standards are developed through an open process of consultation and consensus, in which all interested parties are invited to participate. Through a Memorandum of Understanding with the Commonwealth
39、government, Standards Australia is recognized as Australias peak national standards body. Standards New Zealand The first national Standards organization was created in New Zealand in 1932. The Standards Council of New Zealand is the national authority responsible for the production of Standards. St
40、andards New Zealand is the trading arm of the Standards Council established under the Standards Act 1988. Australian/New Zealand Standards Under a Memorandum of Understanding between Standards Australia and Standards New Zealand, Australian/New Zealand Standards are prepared by committees of experts
41、 from industry, governments, consumers and other sectors. The requirements or recommendations contained in published Standards are a consensus of the views of representative interests and also take account of comments received from other sources. They reflect the latest scientific and industry exper
42、ience. Australian/New Zealand Standards are kept under continuous review after publication and are updated regularly to take account of changing technology. International Involvement Standards Australia and Standards New Zealand are responsible for ensuring that the Australian and New Zealand viewpo
43、ints are considered in the formulation of international Standards and that the latest international experience is incorporated in national and Joint Standards. This role is vital in assisting local industry to compete in international markets. Both organizations are the national members of ISO (the
44、International Organization for Standardization) and IEC (the International Electrotechnical Commission). Visit our web sites www.standards.org.au www.standards.co.nz .au Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 GPO Box 476 Sydney NSW 2001 Administration Phone (02) 8206 6000 Fax (0
45、2) 8206 6001 Email .au Customer Service Phone 1300 65 46 46 Fax 1300 65 49 49 Email .au Internet www.standards.org.au Level 10 Radio New Zealand House 155 The Terrace Wellington 6001 (Private Bag 2439 Wellington 6020) Phone (04) 498 5990 Fax (04) 498 5994 Customer Services (04) 498 5991 Information
46、Service (04) 498 5992 Email snzstandards.co.nz Internet www.standards.co.nz ISBN 0 7337 7985 9 Printed in Australia Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007 The Standard is downloaded from Standard Sharing This page has been left intentionally blank. Accessed by TAFE NSW - NORTH COAST INSTITUTE on 06 Oct 2007