This standard specifies the marking, requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of unbonded prestressed steel strand products. This standard applies to unbonded prestressed steel strands used in post-tensioned prestressed concrete structures. JG 161-2004 Unbonded Prestressed Steel Strand JG161-2004 Standard download decompression password: www.bzxz.net

ICS_91.100.30
Construction industry standard of the People's Republic of China JG 161—2004
Replaces G30061993
Unbonded prestressing steel strand
Unbonded prestressing steel strand2004-06-04Promulgated
Ministry of Construction of the People's Republic of China
Implementation on 2004-12-01
This standard replaces 1G300-1993 Unbonded prestressing steel strand made of pure steel. The main technical changes of this standard compared with JG3 (1993) are as follows: JG 1612004 || TT || The Chinese name of the standard is changed to "Unbonded Prestressed Steel Wire" (1993 version is "Steel Wire", the English name of this standard is "Unbonded Prestressed Steel Wire Bundle" (1993 version is "Steel Wire Bundle"). iraslnns)g--Added a chapter on terminology, definition and symbols! Also in Chapter 3 of this edition]; cancelled the pre-return force of the steel wire bundle (Chapter 1, 3.1, 4.1 and 4.4 of the 193 edition); quickly revised the product marking of the unbonded prestressed steel grade line (3.2 of the 1993 edition; 4.1 and 4.2 of this edition); modified and stipulated that the sheath material generally adopts high-seating-rate olefin resin (4.3 of the 1993 edition, 5.1.3.1 of this edition> quickly made the steel for unbonded prestressed tendons more competitive performance and the newly revised relevant standards or specifications--<1993 edition Section 4.4: This test.2)
Completed the unbonded prestressed steel line product and raw material judgment test method (93 edition 3.1.5.2, 5.3, 5.4 of this edition) The 6th edition of this standard modifies the product inspection classification into: raw material inspection, type inspection and output inspection (6.1 of 1994: 7.1 of this edition) 1-detailed provisions for the inspection of unbonded prestressed strands, batching, sampling and demarcation rules (see 7.2, 7.3 and 7.4 of this edition). 5.1.2.2 of this standard is a mandatory clause. Section A of this standard is an informative section. This standard is proposed by the Standard and Norms Research Institute of the Ministry of Construction and approved by the Ministry of Construction of the People's Republic of China. The standard is the standard of the China Academy of Building Sciences, the technical unit of the Ministry of Construction of the People's Republic of China. The standard was drafted by the China Academy of Building Sciences, Tianjin Zhan Gang Song Group Co., Ltd. and Shizhou City Building Machinery Factory. 、Xi Jingshan Er#: Dongtuan Co., Ltd. Chuanghu Electric Changsha Petroleum Plant Sencan Dongcao Herbal Standard Main Drafters: Feng Daduan, Ding Bin, Qiu Di, Fang Zhongzi, Luan Wenbin, Lu Jin. Zhang Hejie. Wood The standard was released once in August 1993, and this is the first revision: 1 Fan Tian
Unbonded prestressed steel strand
[G1612004
This standard defines the requirements for the marking, testing methods, inspection rules, packaging, transportation, and monitoring of unbonded prestressed concrete strands.
This standard is applicable to post-strength prestressed concrete strands used in post-strength prestressed concrete structures. 2 Normative references
The following documents have become clauses of this standard through reference in this standard. All referenced documents with a month date are included in the following The following documents are not applicable to the following standards (excluding those in the period mentioned above); however, all parties that have reached an agreement based on this standard may use the latest versions of these documents. The latest versions of the undated referenced documents are used in this standard, GB/T 5221-200g concrete steel wire GE: 1111 ethylene resin tire
/1010 wing material hot stretch test square
H934 wall material bending test
[G313 non-stationary prestressed steel bar special anti-magic belt 3 wood coordination definitions and numbers
3.1 Terms and definitions
The following terms and definitions apply to this standard:
non-bonded prestressed steel bar unhknndedpresiressfng Steel strands are wrapped with anti-separation grease. 3. t.2
5unbondediendonB
Unbonded prestressed steel strands are prestressed steel strands with unbonded prestressed steel strands. This kind of prestressed steel strands and the surrounding concrete can be relatively stable. 3. 1. 3
Anti-corrosion lubricating corroslon-resistan1andlubricatlngerease is a special anti-corrosion lubricating grease suitable for unbonded prestressed steel strands. This lubricating grease is made of a mixture of fatty acids and is made of deep refined mineral oil. It is also added with a variety of additives and has anti-rust and anti-dampness properties! 3.1. 4
Plastic sleeves are used to protect the steel strands and the anti-corrosion lubricating grease. Used to protect the stress-sensitive wire from corrosion and to prevent the load between the two concrete bodies. 3.2. Symbols The following symbols are applicable to this standard: W——mass of stress-sensitive steel per meter length, in grams per meter (g/m); Mass of grease in prestressed steel wire after removing oil and sheathing agent per meter length, in grams per meter (R/W); Weight of grease in prestressed steel wire per meter length, in grams per meter (g/): Coefficient of local deviation of unbonded prestressed steel bars per meter length: F, Tension unit: kV: F: Fixed unit: Thousand (V);
The central angle of the circle enclosed by the unbonded prestressed wire segment from the tensioning end to the calculated surface, in degrees (ra7) The length of the unbonded prestressed tendon from the tensioning end to the calculated surface, in meters (m) 4 Marking Www.bzxZ.net
4.1 Marking content
The mark of unbonded prestressed wire consists of the product name code, special material code and main number, UPS-L
Sub-grade, in megawatts (MPu)
Steel wire diameter, in millimeters (mn)
Unbonded prestressed stranded wire
4.2 Marking example
Example: The mark of unbonded prestressed copper warp wire with a nominal diameter of mm and a strength level of MP: is: UPS15.20-1860.
5 Jiangqiu
5. 1 Materials
5.1.1 Steel
5.7.11 The steel bars used for making unbonded prestressed tendons shall comply with the provisions of GB/T5224-2-3, and shall be accompanied by product quality certification documents and test reports provided by the steel production line. 5.1.1.2 The wire used for making unbonded prestressed tendons shall be well protected during transportation and storage, and its surface shall not be rusted or contaminated by other debris before being wrapped with oil. 5.1.2 Anti-corrosion grease
5.1.2. The anti-corrosion grease used in the production of unbonded prestressed tendons shall have good chemical properties: no corrosion effect on the material, can block water, moisture and corrosion, has good oil resistance, and reduces the rate of connection resistance within the specification It does not sink at high temperature and does not become brittle at low temperature within the specified temperature range. The grease shall provide quality certification documents and issue product inspection reports. 5.1.2.2 The performance of the anti-noise grease shall comply with the requirements of Table 1 in JG3907-1993. 5.1.3 Sheath
5.1.3.1 The raw material for making the sheath without pre-stitching steel wire should be the same as the extruded high-density grease, and its quality should meet the requirements of 11! Regulations: The raw material supplier shall provide quality certification and the performance inspection plan of the batch of products. 5.1.3.2 The other items of the filling material shall be reported when the type is changed. 5.1.3.3 The color of the sheath shall be black. When there is a requirement, other colors can also be used, but at this time, the color of the masterbatch shall not reduce the performance of the sheath.
6.7 Specifications and properties of unbonded prestressed steel strands. The main specifications and performance requirements are shown in Table 1.2.
Partial diameter I
Public forest commercial area:
Specifications and performance of unbonded prestressed steel strands Table 1
Pressure index
Public ball group density
Quantity w, g/m
Not less than
Protection tolerance/nm
Processing, after negotiation between supply and demand parties, also strictly supply its electrical display complete and straight light load-free special air travel right. 5.3 Requirements for the manufacture of unbonded prestressed steel strands 0.04--6.10
..4--0.30
f,4-0,10
.IG 161—2004
0. 003 -- 2, 2:4
5. 5.--3. 2..
5. 63:.-.2.204
C. C03--3. X:
Steel system load, anti-expansion grease and high-density channel materials shall be used after passing the stacking test. The production of the cold expansion sleeve shall be completed in one step. The production of the sleeve shall be formed by splicing machine. 5.3.3 The anti-expansion grease shall be fully inspected and the quality of the service shall comply with the requirements of Table 1 of 5.2 and 5. 9. 2
The protection year star shall comply with the provisions of Table 1 of 52. The tensile strength, bending strength and elongation at break shall conform to the specifications in Table 2. Table 2 Sheath properties
Tensile strength: MP:
not less than 3
Le/MP
not less than
56 years of non-stress-induced stress steel strands can be composed of the same core and the same reduction in elongation:
not less than 605
5.3.7 The non-bonded stress-induced stress steel strand has good straightness, according to the provisions of GBI>224-2003. 5.4 Appearance requirements
5.4.1 The surface of the non-bonded stress-induced stress steel strand shall be smooth, without visible damage, atmospheric, and free from obvious damage and mechanical damage.
5.4.2 The minor damage of the unstressed prestressed wire can be repaired without external ethylene biting. 5.5 High quality parts requirements
5.5.1 The supplier of unstressed prestressed wire shall provide the supplier with product quality certification documents, which shall include: supplier name, wire production unit, anti-friction lubricant production unit, grease brand, contractor name, contract number, product mark, quality, number of pieces, standard number, inspection report, inspection and adjustment factory statement.
5.5.2 The manufacturer of large bonded prestressed wire shall be equipped with complete technical documents, production and operation records and raw material data documents, and the liquid documents shall be removable.
JG161—2004
6 Test method
6.1 Steel wire drawing
6.1.1 The basis for the measurement of the vertical load of the steel wire is the positive cross-section of the whole steel wire: the distance between the outer surface of the two relatively bright steel wires and the furnace is determined as the diameter of the vehicle wire, or the distance between the outer surface of the two relatively bright steel wires and the furnace is not less than .2m. It is measured twice in different directions and the lower part is taken. 6.1.2 The steel wire drawing must be carried out in accordance with the relevant provisions of GB/T52242303. 6.1.3 The elongation test method of the wire shall be in accordance with the relevant provisions of GB/T52242001. 6.1.4 The quality of the wire shall be tested by the daily measurement method. 6.2 Anti-corrosion lubricant
6.2.1 Special anti-corrosion lubricant for heat stress steel wire without powder formation The performance test method shall be carried out in accordance with the provisions of Chapter 3 of JG3 ((017-1553). 2.2 The pressure measurement method shall be a steel load of 1m in length, and the error shall not be less than 1. The weight of the steel shall be (W, and then the grease on the steel shall be removed and the pressure shall be W. The weight of grease per meter W, - W, assuming: 6.3 Protection attenuation || tt || 6.3, 1 high-strength ethylene material performance test method shall be carried out in accordance with the provisions of GB115. 6.3.2 Sheath pulling sample and special performance test method shall be carried out in accordance with the relevant provisions of GB/T1040)(115/841. 6.3.3 Sheath thickness measurement method shall be a 1m long non-bonded flow line: remove the relatively large line and note that the weight shall not be less than 10.mm. Each end of the sleeve has 3 points of escape on the surface. Take the smaller value of 6. 4. Strict and low test coefficient
The length of the straight reinforcement and the concrete upper member or the seat by the line (ground line) shall not be less than 5Ⅱ. At the tensioning end, a pressure transmitter of not less than 1.5%FS shall be set respectively. When tensioning, the two increased tensions are used as the signal. First, the straight line energy is calculated, and then the value is calculated according to the previous line reinforcement. The prestressed anchor is replaced by the tensioning end for a certain number of times, and the arithmetic average is taken. The value is calculated as follows:
x=-IRtF/F2(H line reinforcement 9= C)
Value calculation
6.5 Appearance inspection of non-bonded prestressed steel wire
=-hF/F)
Bonded prestressed wire is more intense than wire. The daily test method is used for inspection: 7 Inspection rules
7.1 Inspection classification
....tl
The inspection of non-bonded prestressed wire products is divided into three categories: raw material inspection, production unit type inspection, and production unit factory inspection: dead bonded prestressed wire site acceptance application instructions refer to Appendix A. 7.1.1 Raw material inspection is the production order 7.1.2 The test is the inspection of the product performance of the production unit. It is carried out in any of the following ways:
Trial production of new products or product conversion production h) After the formal production, if there are major changes in materials, technology and production, which may affect the product performance; = After a certain period of production or tracking, generally once every 2-3 years d) After the long-term production of products, the registration of production attachment:
! When the factory inspection results are significantly different from the above-mentioned type inspection: When the national quality supervision agency proposes the requirement for type inspection, the type inspection determined by the national quality supervision agency or the quality supervision agency should be carried out by the quality inspection agency authorized by the company; the type inspection used for product quality control in the development of new products and production can be carried out in the unit. 7.1.3 Factory inspection is a quality control inspection conducted by the quality inspection department in the factory before the delivery of each batch of products. 7.2 Inspection items 7.2.1 Raw material inspection items shall be as specified in Table 3. Table 3 Raw material inspection items | |tt||Liquid spray
Specification system maximum force
Standard force
Maximum total elongation
Slip products
72? The core inspection of the non-knotted pre-seat steel shall comply with the provisions of Table 4. The type inspection and factory inspection items of the table
Type inspection
The whole steel effect is my general meeting
Requirements
Non-standard
Working degree
Disease test
To the right
Prevention period slip assessment quality
! Tensile strength
Pregnancy classics retain the neck you
Protection will be thick certificate
7.3 Raw material certification, inspection and judgment criteria.
High Benz 7. Epoxy tire
Through the body flow market car
Pulling service strength change
Breaking elongation
"Mountain" test
Long creation of the maximum force
Determine the "break elongation
Quantity total long abundance
Disease test
Anti-slip quality
Tensile strength
Change eye strength
Protection can develop
7.3.1 Compared with the batch of line group, the sampling and demarcation shall be carried out in accordance with the provisions of /T524-200: .3.2 Anti-slip grease shall be inspected in batches. Each batch shall be made of the same brand and produced by the same production process. The quality of the material batch is not too wide. Brain oil is taken from the column layer 2.kk for monthly inspection. The inspection results shall be determined in accordance with the provisions of [G3307-1!!s1 Section 7. Inspection data shall be taken from the factory for inspection. 7.3.3 The sheath raw materials shall be inspected in batches. Each batch shall be made of the same brand and produced by the same production process. The high-density ethylene grease shall be made up of each batch of 5
JG 161—2004
The mass is not more than 5℃t. Randomly select 2.0kg for the inspection specified in Table 7.2.1. The inspection results shall be determined according to the technical rules specified in C1:5
7.4 Unbonded stress-stressed steel strand product batching, sampling and judgment rules 7.4.1 Factory inspection batches and auxiliary samples
7.4.1.1 Unbonded steel strands shall be composed of copper strands of the same number, specification and production process before acceptance. The mass of each batch shall not be more than t. Three strands of steel strands shall be randomly selected from each batch for inspection according to the items specified in Table 4 of 7.2.2. 7.4.1.2 Anti-lubrication drop point and corrosion test batches and sampling shall be carried out as specified in 7.3.2. 7.4.1.3 The quality of the non-bonded prestressed steel wire shall be inspected in batches. Take 3 samples for inspection every 60 seconds. 7.4.1.4 The non-bonded prestressed steel wire shall be inspected in batches. Take 3 samples for inspection every 60 seconds. 7.4.1.5 The thickness of the sheath shall be inspected in batches. Take 3 samples for inspection every 30 seconds. 7.4.1.6 The quantity of non-bonded prestressed steel wire shall be inspected in batches: 00% 7.4.2. Determination and inspection of factory inspection
When all factory inspection items meet the technical requirements of this standard, the batch of products is qualified. When there are unqualified items in the inspection results, the unqualified items should be sampled for re-inspection. If the inspection results are still unqualified, all supplied products should be inspected one by one. The qualified difference is:
8. Marking, packaging, transportation, storage
8.1 Marking
No bonding stress data should be The mark should be marked with: manufacturer name, product name, specification, strength level, quantity, production date or production batch number:
8.2 Packaging
Prestressed steel strands must be packed with tape to prevent damage during normal handling. The diameter of the prestressed steel strand should not be less than 1.9m. The weight of the prestressed steel strand should not be less than 350kg
8.3 Prestressed steel strands should be transported in reels. During transportation and loading, the slings should be wrapped with rubber, nylon belts and other materials, and the prestressed steel strands should be loaded and unloaded lightly. It is forbidden to drop or drag on the filling, and it is forbidden to remove iron objects without standing on the prestressed steel strands. 8.4 Purchase and storage
Unbonded prestressed low warp strands should be classified and bundled according to different specifications, and piled in well-ventilated warehouses; when piled in large quantities, it is strictly prohibited to place them in places affected by heat, and they should not be directly connected to the ground and covered with rain cloth. When the mass of each coil is about 2okg, it is difficult to store them. 6
A.1 On-site acceptance
Appendix A
(Informative Appendix)
On-site acceptance and use instructions
JG1612004
1.1.1 On-site acceptance After the unit purchases the unbonded stress test stranded wire, it shall be inspected by on-site batch samples before use. For steel grain, the inspection can be conducted by a nationally authorized inspection agency. For other inspections, the inspection team can send the inspection agency for inspection. A.1.2 Recommended on-site inspection items are shown in Table A.1 Table A.1 On-site inspection items
Steel grain
Blue hate Steel rubber Total maximum force
Design, specific proportion Tensile force
Quantity Total force Unit length Room
Number Quality protection
Anti-separation grease quality
A, 1.3 Recommended on-site inspection group, sample | |tt||Sheath car installation
.1.3.1 Unbonded prestressed steel strands can be inspected in batches, and the quality of each batch shall not exceed 6(1! Outside
4,1.3.2 Three unbonded prestressed steel strands are randomly selected from each batch as samples. According to Table A, 1, the steel strands, lubricating tires and sheaths are inspected monthly:
4.1.3.3 Outside, the inspection shall be based on 1C% of the total supply quantity.4.2 Use Yueming
A,2.1 Construction adopts acid-free hoisting methods or large bonding jaws of potassium color trays , small twisted wire. A.2.2 The bondless prestressed steel wire shall be cut by wheel cutting machine during cutting. 4.2.3 It is recommended to take necessary measures to protect the sheath during cutting, transportation and installation of bondless prestressed steel wire. Minor local damage can be repaired, but serious damage cannot be used. A2.4 The bondless steel used in hot and cold environment should be small. It is necessary to ensure the effective sealing of the bondless prestressed steel wire and the joint parts. It can be sealed or a second layer of waterproof ethylene rubber bone is formed on the steel wire to make the steel grade The wire and anchor are in a fully enclosed grease protection state.
A.2.5 The unbonded prestressed steel strands shall not be exposed to excessively high temperatures. They shall not be affected by liquid spots and grounding. A.2.6 The pins and converters used in conjunction with unbonded prestressed steel strands shall comply with the Technical Specification for the Application of Anchors, Converters and Quick Connectors for Stress Relief (TC85-20021). A.2.7 The Technical Specification for the Use of Unbonded Prestressed Steel Strands shall comply with the provisions of [G]/T92.
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