BS 4482-2005 Steel wire for the reinforcement of concrete products - Specification《混凝土配筋用钢丝 规范》.pdf

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1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58SpecificationICS 77.140.15; 91.080.40Steel wire for the reinforcement of concrete products BRITISH

2、STANDARDBS 4482:2005Incorporating Amendment No. 1BS 4482:2005Bars, wire bodiBBritish Concrete SocietyDeGInstiUK CerThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2005 BSI 2007First published August 1969First revision November 19

3、85Second revision September 2005The following BSI references relate to the work on this British Standard: Committee reference ISE/9/1Draft for comment 04/30109893 DCISBN 0 580 46588 8Precast Concrete Federationpartment of Transport Highways Agencyalvanizers Associationtution of Structural Engineerst

4、ification Authority for Reinforcing SteelsUK Steel AssociationAmendments issued since publicationAmd. No. Date Comments17104 30 April 2007 See forewordCommittees responsible for this British StandardThe preparation of this British Standard was entrusted by Technical Committee ISE/9, Steel for concre

5、te reinforcement, to Subcommittee ISE/9/1, and fabric for concrete reinforcement, upon which the following es were represented: ritish Coatings FederationBS 4482:2005 BSI 2007ContentsPageCommittees responsible Inside front coverForeword ii1Scope 12 Normative references 13 Terms and definitions 14Sym

6、bols 45 Designations 56 Steelmaking and manufacturing processes 57 Product characteristics 58 Evaluation of conformity 109 Test methods 1210 Identification 1311 Verification of properties in the case of dispute 13Annex A (normative) Bond test for ribbed and indented steel wire Beam test 14Annex B (n

7、ormative) Identification requirements 22Bibliography 24Figure 1 Rib geometry example with two rows of transverse ribs 8Figure 2 Indentation geometry (example with three rows of indentations) 9Figure A.1 Dimensions of the hinge for beam type A (d 8 5cbeteeE BSI 20079BS 4482:20058 Evaluation of confor

8、mity8.1 Routine inspection and testing8.1.1 GeneralReinforcing steels shall be produced under a permanent system of routine inspection and testing, which shall include evaluation of specified properties, as described in 8.1.2 and 8.1.3.8.1.2 Sampling and testing of finished products8.1.2.1 CoilsThe

9、test unit shall be the cast or part quantity of the cast.The rate of testing shall be as follows:a) For chemical composition, one analysis per test unit. The chemical composition (cast analysis) of the steel shall be determined by the steel producer.b) For rebend tests, mass per metre and surface ge

10、ometry, one test piece per test unit and nominal diameter.c) Test results shall be evaluated in accordance with 8.1.3.8.1.2.2 Decoiled productsThe processor of products in coil shall ensure that the decoiled products continue to meet the specified property requirements of this standard. Inspection a

11、nd testing of decoiled wires shall include as a minimum:a) visual inspection for surface geometry damage of every coil processed;b) surface geometry measurement on at least one sample per day and produced size;c) tensile testing at a frequency of at least one sample per machine type (roller or spinn

12、er) per week from each of two processed sizes. The sampling shall be such that all machines and sizes are covered in a six-month period. Only one sample shall be taken from each coil.Testing may be carried out either by the processor using its own resources (internal or external) or by the processor

13、 in co-operation with the coil manufacturer. The tests shall not be seen as release tests, but as the basis for the assessment of the long-term quality level (LTQL) as described in 8.2.8.1.3 Evaluation of test results8.1.3.1 Tensile propertiesWhere the characteristic value Cvis specified as a lower

14、limit, the results shall be deemed to conform to this standard if either:a) all individual values are greater than or equal to the specified characteristic value Cv; orb) wherea1is 10 MPa for Re, zero for Rm/Re, and 0 % for Agt,and all individual values are greater than or equal to the minimum value

15、s given in Table 9.Table 9 Absolute minimum values of tensile propertiesNominal diameter, dGrade Yield strength, ReTensile/yield strength ratio, Rm/ReTotal elongation at maximum force, Agtmm MPa %k12 250 243 1.13 4.0xCva1+!For tensile tests, one test piece per 30 t with at least one test piece per t

16、est unit and per nominaldiameter.“ 10 BSI 20078 500 485 1.01 0.8U8 500 485 1.03 2.0BS 4482:20058.1.3.2 Bend performance, geometry, mass per metreIn the rebend test, all test pieces shall fulfil the requirements of 7.2.4.If testing the surface geometry, the results shall meet the requirements of 7.4.

17、If testing the mass per metre, no individual value shall be outside the tolerances specified in 7.3.2.8.1.3.3 RetestsIf any test specimen fails to meet the yield strength, stress ratio, total elongation at maximum force, rebend or rib or indentation geometry requirements, two additional test specime

18、ns shall be taken from different wires of the same batch to undergo tests. If both additional test specimens pass the retests, the batch shall be deemed to conform to this standard. If either of the additional test specimens fails the retests, the batch shall be deemed not to conform to this standar

19、d.8.1.4 Traceability and test reportsDelivered batches shall be identifiable and traceable to the manufacturer and to their production data. The manufacturer shall establish and maintain the records required and shall identify the products and their delivery documentation accordingly.For each delive

20、ry, manufacturers shall supply the following information:a) the cast number and cast analysis, including all specified elements and elements used for the calculation of the carbon equivalent value;b) the carbon equivalent value;c) the results of the tensile and rebend tests;d) mass per metre;e) the

21、manufacturing process route; andf) for ribbed or indented wires, the rolled on manufacturers mark.8.2 Assessment of the long-term quality level8.2.1 GeneralThe results of tests on all test units of continuous production shall be collated and statistically evaluated for Re, Agt, and Rm/Retaking eithe

22、r the number of results corresponding to the preceding six months operation or the last 200 results, whichever is the greater.8.2.2 Determination of the long-term quality levelThe evaluation shall be carried out per nominal diameter.The following requirement shall be satisfied for Re, Agtand Rm/Re:w

23、hereis the average value;s is the estimate of the standard deviation of the population;k is the coefficient listed in Table 10 for Reand in Table 11 for Agtand Rm/Re;Cvis the specified characteristic value.The foregoing is based on the assumption that the distribution of a large number of results is

24、 normal but this is not a requirement of this standard. However, the following alternative methods may be used to establish conformity of the production with the requirements of this standard:a) graphical methods including control charts;b) non-parametric statistical techniques.xks Cvx BSI 200711BS

25、4482:2005Table 10 Coefficient k as a function of the number n of test results (for a reliable failure rate of 5 % p = 0.95at a probability of 90 %)Table 11 Coefficient k as a function of the number (n) of test results (for a reliable failure rate of 10 % p = 0.90 at a probability of 90 %)9 Test meth

26、odsThe tensile test for the determination of Re, Rm/Reand Agt, the rebend test, the measurement of the surface n k n k5 3.40 30 2.086 3.09 40 2.017 2.89 50 1.978 2.75 60 1.939 2.65 70 1.9010 2.57 80 1.8911 2.50 90 1.8712 2.45 100 1.8613 2.40 150 1.8214 2.36 200 1.7915 2.33 250 1.7816 2.30 300 1.7717

27、 2.27 400 1.7518 2.25 500 1.7419 2.23 1000 1.7120 2.21 Z 1.64n k n k5 2.74 30 1.666 2.49 40 1.607 2.33 50 1.568 2.22 60 1.539 2.13 70 1.5110 2.07 80 1.4911 2.01 90 1.4812 1.97 100 1.4713 1.93 150 1.4314 1.90 200 1.4115 1.87 250 1.4016 1.84 300 1.3917 1.82 400 1.3718 1.80 500 1.3619 1.78 1000 1.3420

28、1.77 Z 1.2812 BSI 2007geometry and the determination of the relative rib or indentation area fRor fPthe determination of deviation from nominal mass per metre and the methods for chemical analysis shall be in accordance with BS EN ISO 15630-1:2002, supplemented with the instructions in this standard

29、. In particular, pre-test conditioning shall be in accordance with 7.2.2.BS 4482:200510 IdentificationEach reinforcing steel shall have identification marks to identify the manufacturer according to the requirements of Annex B.Where CE marking is required, product marking shall be in accordance with

30、 BS EN 10080:2005.11 Verification of properties in the case of dispute11.1 Mechanical properties11.1.1 Whenever the determination of a property specified in this standard as a characteristic value creates a dispute, the value shall be verified by selecting and testing three test pieces from various

31、pieces from the batch under examination.If one test result is less than the specified characteristic value, both the test piece and the test method shall be carefully examined. If there is a local fault in the test piece or reason to believe that an error has occurred in the test, the test result sh

32、all be ignored. In this case a further single test shall be carried out.If the three valid test results are greater than or equal to the specified characteristic value, the batch shall be deemed to conform to this standard. If not, the requirements of 11.1.2 shall apply.11.1.2 If 11.1.1 is not fulfi

33、lled, 10 additional test pieces shall be selected from different products in the batch.The batch shall be deemed to conform to this standard if the average test result of the 10 test pieces is higher than the characteristic value and the individual values are higher than the minimum value given in T

34、able 9, using the coefficient given in Table 10 or Table 11, as appropriate.If not, the batch is rejected.11.2 Product analysisIf during product analysis, a single sample falls outside the maximum deviation limits for the composition range of a specified element, given in Table 2, further samples sh

35、all be selected from the remainder of the batch as follows:a) at least two samples from the same cast for delivered masses up to 5 t;b) at least five samples from the same cast for delivered masses up to 20 t;c) at least eight samples for delivered masses over 20 t.If any of the further samples anal

36、ysed fall outside the maximum product analysis levels given in Table 2 for any element, the batch shall be deemed not to conform to this standard. BSI 200713BS 4482:2005Annex A (normative) Bond test for ribbed and indented steel wire Beam testA.1 IntroductionThis annex describes a method for testing

37、 the bond characteristics for ribbed and indented wires to be used as reinforcing steel in concrete structures. The beam test is intended to determine the bond of reinforcing steel and is to serve as a basis for the comparison of reinforcing wires of approximately the same wire diameter but with dif

38、ferent surface configurations.The test method is applicable for reinforcing steel wire in diameters k 32 mm.NOTE The method is based on the RILEM-Recommendation RC5, Bond test for reinforcement steel 1.A.2 Principle of the testA test beam is loaded by simple flexure until complete bond failure of th

39、e reinforcing steel occurs in both half-beams or until the reinforcing steel itself fails. During loading, the slip of the two ends of the reinforcing steel is measured.The beam used for the test consists of two parallelepipedal reinforced concrete blocks interconnected at the bottom by the reinforc

40、ing wire of which the bond is to be tested, and at the top by a steel hinge. The dimensions of the two blocks and the hinges are determined by the diameter of the reinforcing wire to be tested. The test is illustrated in Figure A.1, Figure A.2, Figure A.3, and Figure A.4.The dimensions of the test b

41、eams depend on the nominal diameter of the reinforcing wire for which the bond is to be determined. For nominal diameters less than 16 mm, a beam specimen of type A is used and for nominal diameters equal to or larger than 16 mm, a beam specimen of type B is used (see Figure A.3 and Figure A.4).NOTE

42、 Experience of testing bars with diameters larger than 32 mm is limited. To use the test method of this annex for such large diameters, a type testing program should be performed to evaluate the applicability of the test method.Dimensions in mmKey1 width = 100 mmFigure A.1 Dimensions of the hinge fo

43、r beam type A (d 16 mm)20906015602045114 BSI 2007BS 4482:2005Dimensions in mmKey1 width = 150 mmFigure A.2 Dimensions of the hinge for beam type B (d U 16 mm)Dimensions in mmKey1 Slip measuring device2 Steel hinge3 Plastic sleeves4 Movable supportFigure A.3 Beam test type A (d 16 mm)2010080206020451

44、650375 37515050LLL50L10dP/2 P/210030110d324d10018050 BSI 200715BS 4482:2005A.3 Samples and specimensIf various sizes of the same technical class of reinforcing steel and the same surface configuration are to be tested they may be grouped into series. All diameters within a group shall have the same

45、configuration with regard to ribs. A suitable grouping is shown in Table A.1.NOTE To have the same surface configuration implies that the relationship between rib height/wire diameter and rib spacing/wire diameter as well as the rib inclination is the same.Table A.1 Series of reinforcing wire diamet

46、ers for testing of bondTwenty-five beam tests shall be carried out for each series and type of surface geometry with the representative diameter of the series. Samples shall be selected to minimize the variation in surface configuration within a series. If all samples are not taken from the same wir

47、e, then they should be taken from as few wires as possible.If the representative diameter of a series is not manufactured, the largest diameter produced in the series shall be tested.If reinforcing wires with the same surface geometry but with different specified yield strength are to be characteriz

48、ed, the tests shall be carried out with the product having the highest specified yield strength.Dimensions in mmKey1 Slip measuring device 2 Steel hinge 3 Plastic sleeves 4 Movable supportFigure A.4 Beam test type B (d U 16 mm)Denomination of the seriesRange of nominal diameters, dRepresentative nom

49、inal diameter of the seriesmm mmSmall diameters d k 10 8Medium diameters 10 d k 20 16Large diameters 20 d k 32 32Very large diameters 32 d k 50 Each size to be tested600 60020060LL10dP/2 P/21504014LL10d1 1002d5031502405016 BSI 2007The surface geometry of the reinforcing steel to be used in the tests shall be described in accordance with BS EN 10080:2005 and measured in accordance with BS EN ISO 15630-1:2002. All the parameters required to calculate the relative rib area shall be