This standard applies to bending and reverse bending tests of steel bars for reinforced concrete. The purpose of the reverse bending test is to determine the reverse bending deformation performance of steel bars after bending plastic deformation and aging. YB/T 5126-2003 Bending and reverse bending test methods for steel bars for reinforced concrete YB/T5126-2003 Standard download decompression password: www.bzxz.net

YB/T51262003
This research adopts 1:19 shot blasting and bending test method (English 2nd edition) and this standard 15030651890 is newly drafted. In the appendix, the article number of this standard is compared with the article number of 1500065:1S99.
Taking into account the national conditions of my country and the technical principle of this standard, this standard has been adjusted when adopting 1S00651590. The relevant technical differences have been compiled in the following text, and the vertical single line mark is placed in the margin of the page where they are applied. A list of the reasons for these technical differences is given in the specification for reference. For 1500065:1S92, the following editorial modifications are made to this standard: a! "National Le Standard Difficult" is collected as \This standard" 1 In addition to S10061990's foreword:
C current normative use of my country's legal measurement units and industry numbers, this standard I if H/13126-1993 national interval bend re-test method This standard Y: T51 effective -193 mainly in the following aspects of the quality of the machine supplement: add Chapter 3 normative references Chapter 3 test report: add the elaboration on the test principle,
: - added and modified some symbols and definitions: in addition to the original standard about the bending by the force formula related content; in the test equipment, the tower plan can accurately measure and control the commercial curve and the friend bend out of the degree of the flap type and other installation stomach, remove the original ladder content;
.… The most people's connection pursuit of the kidney curve and the reverse test curve was adjusted: add the effect of heat treatment Temperature protection room and its setting requirements: except for the original requirement A, cancel the five-class easy treatment of the test results, and only conduct one "qualified" "unqualified" assessment! Add information on pregnancy A, information on Appendix B
Appendix 1 and Appendix B of this standard are both informative appendices. This standard is issued by China Iron and Steel Association.
This standard is not under the jurisdiction of the National Standardization Technical Committee. The originating units of this standard: Chongqing Iron and Steel Research Institute, Iron and Steel Research Institute, Yinan Shijin Group Co., Ltd., and the originators of this standard are Sun Aojin, Zhang Gexin, Li Jiulin, and Lianxiu Ke. The standard replaces the standard version released as follows: GBE0291985.YB:T51261993
1 Juyuan
Steel for reinforced concrete
Test method for bending and reverse bending
YB/T 5125--2003
This standard applies to the bending test of steel concrete. The purpose of the reverse bending test is to determine the plastic deformation before and after aging. The terms in the normative referenced documents
documents are not the same as the terms in this standard. All the parts with a specified period of compression shall not be used in this standard (excluding the whole light weight of the product) or revised versions. However, all parties involved in the standard are encouraged to study and cooperate with the standard. The latest versions of these documents can be recorded. For any referenced items without a date, their latest versions are applicable to this standard. 1122 Steel and its products Mechanical properties test sample preparation G29F: 996egIS757) G/232 Full material re-test method G352-33e01S438-9853 Principle
The test is to make the test wire two pairs of back force, so that the test wire will be subjected to the specified self-tensioning blood center and produce plastic deformation around the medical nest surface to a specific medium test. The aging performance book is the same as the Bending test: color bending test age and heat treatment, and then the sample area to the bending standard to restore a certain degree,
4 Symbols and meanings
The symbols and definitions used in this standard are shown in Table 1: Table 1 will be the symbols and definitions
5 Test equipment
5.1 Blood bending device
refers to the increase in the determination of the core
Test sample direct price
Small diameter
Medium bending angle
Reverse bending angle
Figure 1 is an example of a bending device, Fixed, guide a quick test around the empty user and let the user return to the empty space and (Li Xin) carry out bending: the fixed, mountain round and (Ji Xinyu called the system to make the sample around the round bend to prove the actual situation by the test can also be carried out according to (stop/1232. What effort is required for the test ceremony? The same is equipped with a policy indicator about the bending condition: 5.2 Reverse bending device -
Figure ≥ is an example of a reverse bending device. The degree can be indicated on the negative degree display. The bending angle and degree YB/T5126—2003 are shown in Figure 3.
5.3 Aging heat treatment
Aging heat treatment can be carried out with heat treatment or water addition. When heating is used, a temperature control device should be used to control the temperature. When heating with water, no temperature control device is required. 5.4 Required degree drawing device
Test equipment All accurate angle measurement or control devices are equipped with zone (center)
and use;
First center
· Turn over the plate!
High bending device actual drawing
Use 2, with a phase indicator of the reverse change of the typical cover example empty camp
Respect the bending flow this place,
3-this room position
6 Sample preparation
3 Check the bending angle of the reverse package
6.1 Cut the sample according to the relevant provisions of GH:T3975 or the agreement between the supply and demand parties, and the sample becomes the delivery state: 6.2 The sample should retain the original rolling surface and should be straight. The length of the sample is usually accepted to meet the test requirements. 6.3 The parts of the model are not equipped with any gates or marks under the training, 7 Test procedures
7.1 Bending test
7.1.1 The test should be carried out at room temperature of ~35. YB/I5126-2003
7.1.2 The bending is limited (centering, the angle surface) should meet the requirements of relevant product standards.
7.1 The bending rate is not completed. The bending can be accurately controlled by the automatic indicator. The position indicator can also be used to automatically control the angle of each section. After the test is completed, the test should be carefully observed. If there is no crack, it is evaluated as qualified. 7.2 Reverse bending test
7.2.1 The test group shall be determined by the product standard. The bending extension and the non-side bending extension shall be tested under the condition of 13-35 ℃ in the room. 7.2.2 After bending, the specimen shall be subjected to aging heat treatment under the condition of free ridge in the air for at least 1-2 hours to room temperature, and then the reverse bending test shall be carried out. If the product standard or the supplier stipulates that the bending specimens can be subjected to aging heat treatment without aging, the bending specimens can be directly subjected to the bending extension under room conditions. 7.2.3 The reverse bending angle shall not exceed 2/3. The test equipment shall be able to accurately measure the bending angle. The test shall be completed and the actual test result shall be determined to be qualified. Test report
The test report shall contain the following contents:
) This standard;
YB/T5126—2003
Specimen identification;
Specimen grade and nominal diameter
Bending diameter:
Production and reverse transformation degree;
Specimen test results,
(Material Appendix)
This standard chapter number and S010065:1990 chapter number comparison table A1 gives a comparison table of standard chapter number and S010065:1990 chapter number. A.1 The service number of this standard is the same as that of 1S010065:1990. The corresponding chapter number of this standard is 7.1~3.1.3.7.2-7.3.3.YB/T:5126-2D03. The corresponding international standard number is 5.1.1~5.2.6.2-3. 2
Note: Except for the items in this standard, all other items are the same as those in 1501C51930. The corresponding ratios are 5
YB/I5126—2003
Informative Appendix:
This standard has technical differences with 15131D265, 1990 and their limits. Table B1 gives the technical differences and limitations between this standard and 1S0191:65:1990. 1 This standard is not directly related to IS01 10065; 1990. The minimum technical differences are as follows: resistance to deformation, deformation resistance, and color performance improvement. The international standard is adopted in accordance with the national standard non-real ratio diagram: meter end standard ET tR2975.
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