GB/T 33953-2017 in English
SUPERSEDEDCorrosion resistance bars for the reinforcement of concrete
- Issued on:2017-07-12
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 33953-2017钢筋混凝土用耐蚀钢筋》由TC183（全国钢标准化技术委员会）归口，TC183SC7（全国钢标准化技术委员会钢筋混凝土用钢分会）执行，主管部门为中国钢铁工业协会。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 33953—2017
Comparison table of standard frameworks
| Standard Dimensions | GB/T 33953—2017 | Related Standards |
|---|---|---|
| Definition and Scope | The definition and scope of application of corrosion-resistant steel bars are clarified, and they are applicable to ribbed steel bars in hot-rolled or controlled-rolled and controlled-cooled states. | GB/T1499.2 Steel for Reinforced Concrete Standard is used as the basic reference. |
| Classification and grades | Divided into industrial atmosphere corrosion resistant steel bars and chloride ion corrosion resistant steel bars, grades include HRB400a, HRB500cE, etc. | Refer to YB/T 4367-2015 Steel bar corrosion test method series standards. |
| Technical requirements | Including detailed provisions on chemical composition, mechanical properties, bending and reverse bending properties, corrosion resistance, etc. | Combined with GB/T 228.1 Metal material tensile test method and GB/T 232 Metal material bending test method. |
Standard Formulation Background and Technology Evolution Analysis
With the increasing durability requirements of modern buildings, reinforced concrete structures are susceptible to chloride ion erosion and industrial atmospheric corrosion in complex environments. In order to meet market demand, GB/T 33953-2017 standard came into being, aiming to improve the corrosion resistance of steel bars through alloying technology, filling the domestic gap and aligning with international standards.
Professional Terminology Explanation and Practical Application Cases
1. Corrosion Resistance Bars
Definition:Hot-rolled ribbed steel bars with improved corrosion resistance by adding alloying elements such as Cu, Cr, and Ni.
Application:Widely used in marine engineering, bridges, tunnels and other fields, especially in salt spray environments and areas with severe industrial pollution.
2. Relative Corrosion Rate
Definition:A comparison index of the average corrosion rate of corrosion-resistant steel bars compared with ordinary steel bars.
Calculation formula:Relative corrosion rate = (average corrosion rate of corrosion-resistant steel bars / average corrosion rate of ordinary steel bars) × 100%
Application:Used to evaluate the performance advantages of corrosion-resistant steel bars in different environments and ensure their use in harsh environments.
Implementation suggestions
- Material selection suggestions:Choose the appropriate grade according to the engineering environment (such as HRB400a for industrial atmosphere, HRB500cE for areas with severe chloride ion corrosion).
- Construction precautions:Avoid mechanical damage to the steel bar surface and ensure that the thickness of the protective layer meets the design requirements.
- Quality Control: It is recommended to use a combination of batch inspection and random sampling, focusing on chemical composition, mechanical properties and corrosion resistance.
- Maintenance Recommendations: Regularly conduct surface inspections in corrosion-prone areas and deal with local corrosion problems in a timely manner.
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