GB STANDARD HIGH QUALITY HOT ROLLED STEEL REINFORCEMENT BAR
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 100000 m.t./month
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Product Description
Appearance: Black
Technique: Slitting hot rolled steel coil
Grade: Q235, Q195,A36 SS400 S235jr.St37-2
Standard: AISI,GB,DIN,ASTM,EN,JIS
Length: 6m, 9m, 12m or as your requirement.
Width: 10mm-1010mm
Thickness: 1.5mm-20mm
Place of origin: Tianjin China (Mainland)
Packaging Details: In bundles for exporting and sea worthy
Delivery Detail: Within 15-35 days after receiving L/C or deposite T/T
General specification as below:
Flat Bar Specification | |||
Width (mm) | Thickness (mm) | Length (m) | Theoretical Weight (kg/m) |
20 | 2.0 | 6/9/12 | 0.31 |
20 | 2.5 | 6/9/12 | 0.39 |
20 | 2.75 | 6/9/12 | 0.43 |
25 | 2.5 | 6/9/12 | 0.49 |
25 | 3.75 | 6/9/12 | 0.74 |
30 | 2.5 | 6/9/12 | 0.59 |
30 | 3.5 | 6/9/12 | 0.82 |
30 | 9.75 | 6/9/12 | 2.30 |
40 | 3.5 | 6/9/12 | 1.10 |
40 | 4.75 | 6/9/12 | 1.50 |
40 | 11.75 | 6/9/12 | 3.69 |
50 | 2.75 | 6/9/12 | 1.08 |
50 | 4.5 | 6/9/12 | 1.77 |
50 | 9.75 | 6/9/12 | 3.83 |
60 | 5.5 | 6/9/12 | 2.60 |
60 | 7.5 | 6/9/12 | 3.53 |
60 | 11.5 | 6/9/12 | 5.42 |
80 | 5.5 | 6/9/12 | 3.45 |
80 | 7.5 | 6/9/12 | 4.71 |
80 | 11.75 | 6/9/12 | 7.38 |
100 | 3.25 | 6/9/12 | 2.55 |
100 | 4.75 | 6/9/12 | 3.73 |
100 | 7.5 | 6/9/12 | 5.89 |
120 | 9.75 | 6/9/12 | 9.18 |
120 | 11.75 | 6/9/12 | 11.07 |
150 | 9.75 | 6/9/12 | 11.48 |
150 | 11.5 | 6/9/12 | 13.54 |
150 | 13.5 | 6/9/12 | 15.90 |
160 | 11.75 | 6/9/12 | 14.76 |
200 | 9.5 | 6/9/12 | 14.92 |
250 | 5.75 | 6/9/12 | 11.28 |
340 | 7.75 | 6/9/12 | 20.68 |
Products Advantages
1. high quality competitive price and Accurate in size
2. high dimensional accuracy
3. Guaranteed raw material
4.high utilization rate of material
5.convenient in construction, saving much time and labor
6. high mechanical strength
Application: Widely used for construction, Ship building, Machinery manufacturing ,steel structure,agriculture and steel grating.
- Q:How do steel rebars affect the overall corrosion resistance of marine structures?
- The overall corrosion resistance of marine structures is significantly affected by steel rebars. Depending on various factors, the presence of steel rebars in concrete marine structures can either enhance or deteriorate their resistance to corrosion. To begin with, when appropriate preventive measures are taken, steel rebars can enhance corrosion resistance. For example, if the rebars are adequately coated with anti-corrosion materials like epoxy or zinc, they can provide an additional layer of protection against the corrosive effects of seawater. Moreover, ensuring proper concrete cover and compaction during construction can help prevent seawater from penetrating the rebars, reducing the risk of corrosion. Conversely, if steel rebars are not properly coated or if the concrete cover is insufficient, they can contribute to the degradation of marine structures. When exposed to the aggressive marine environment, rebars can corrode, leading to rust formation. Rust occupies more space than steel, causing expansion that exerts pressure on the surrounding concrete. This pressure can result in concrete cracking and spalling, further exposing the rebars to corrosion and compromising the overall structural integrity of the marine structure. Regular maintenance and inspection are crucial to mitigate the negative effects of steel rebars on corrosion resistance. Periodic inspections can help identify any signs of corrosion, enabling timely repairs or replacement of rebars. Additionally, implementing cathodic protection systems can provide an electrochemical countermeasure against corrosion, ensuring the longevity and durability of the marine structure. In conclusion, steel rebars play a vital role in the corrosion resistance of marine structures. Proper coating, concrete cover, and maintenance measures are essential to ensure the positive contribution of rebars to corrosion resistance. Neglecting these factors can lead to the degradation of marine structures.
- Q:Can steel rebars be painted or coated?
- Yes, steel rebars can be painted or coated. Painting or coating steel rebars helps to protect them from corrosion and extend their lifespan. It is a common practice in construction and reinforcement projects to apply paint or protective coatings on steel rebars to enhance their durability and resistance to environmental factors.
- Q:What is the average lifespan of steel rebars in concrete structures?
- The average lifespan of steel rebars in concrete structures can vary depending on various factors such as the quality of the steel, environmental conditions, and maintenance practices. However, under normal conditions, steel rebars in concrete structures are expected to have a lifespan of around 50 to 100 years.
- Q:What are the different grades of steel rebars used in bridge construction?
- The construction of bridges requires the use of different grades of steel rebars, which are selected based on the specific demands and load-bearing capacities of the structure. The following are the most frequently employed grades of steel rebars in bridge construction: 1. Grade 40: This is the lowest grade of steel rebar utilized in bridge construction. It possesses a minimum yield strength of 40,000 pounds per square inch (psi). Grade 40 steel rebars are typically employed for lighter loads and smaller bridge structures. 2. Grade 60: This is the grade of steel rebar most commonly used in bridge construction. It boasts a minimum yield strength of 60,000 psi. Grade 60 steel rebars are suitable for medium to heavy loads and are frequently employed in bridge piers, girders, and deck slabs. 3. Grade 75: This grade of steel rebar possesses a minimum yield strength of 75,000 psi. Grade 75 steel rebars are employed for heavy loads and large bridge structures that necessitate greater strength. They are commonly utilized in the construction of high-rise bridges and long-span structures. 4. Grade 80 and Grade 100: These are high-strength steel rebars with minimum yield strengths of 80,000 psi and 100,000 psi, respectively. These grades of steel rebars are used in specialized bridge construction projects that require exceptional strength and durability. They are commonly employed in the construction of cable-stayed bridges and suspension bridges. It is worth noting that the selection of the appropriate grade of steel rebar for bridge construction relies on various factors, including anticipated loads, span length, design specifications, and local building codes. Consulting with structural engineers and adhering to recommended guidelines ensures the utilization of the appropriate grade of steel rebar, thereby guaranteeing the safety and longevity of the bridge structure.
- Q:How do steel rebars impact the overall energy efficiency of a structure?
- Steel rebars can have both positive and negative impacts on the overall energy efficiency of a structure. On one hand, steel rebars can enhance the structural integrity and durability of the building, leading to a longer lifespan and reduced energy consumption for repairs and maintenance. Additionally, steel rebars can be used to reinforce concrete, which provides better insulation and thermal efficiency. On the other hand, the production of steel rebars requires significant energy and emits greenhouse gases, contributing to the carbon footprint of the structure. Therefore, the overall energy efficiency of a structure depends on various factors, including the design, construction techniques, and the use of sustainable materials alongside steel rebars.
- Q:How are steel rebars marked for identification on construction sites?
- Various methods are commonly used to mark steel rebars for identification on construction sites. The primary method involves attaching tags or labels to the rebars, which contain crucial information like the rebar's diameter, grade, length, and any necessary specifications or codes. In addition to tags, rebars can also be marked with paint or ink. This can be achieved by either spraying or stenciling the required information directly onto the rebar's surface. Paint or ink markings are typically used for temporary identification or when using tags is not feasible. Another marking method involves using colored plastic or vinyl caps on the ends of the rebars. These caps are usually color-coded to indicate different characteristics, such as rebar size or type. This allows for easy visual identification on the construction site. It's important to note that the specific method of marking rebars may vary based on local regulations, project requirements, or the preferences of the construction company or engineer. The purpose of these markings is to ensure that rebars can be easily identified and sorted during construction, promoting proper installation and adherence to design specifications.
- Q:What are the environmental impacts of using steel rebars in construction?
- The utilization of steel rebars in construction yields various environmental effects, both advantageous and disadvantageous. One of the positive consequences is that steel possesses exceptional durability and longevity, resulting in structures constructed with steel rebars having an extended lifespan. Consequently, the frequency of repairs or replacements is reduced, thereby diminishing the accumulation of waste over time. Nevertheless, the manufacture of steel rebars entails considerable adverse environmental outcomes. The production of steel involves the extraction and processing of iron ore, which necessitates extensive mining operations. These mining activities contribute to deforestation, the destruction of habitats, and soil erosion. Furthermore, the extraction and processing of iron ore consume substantial amounts of energy, thereby emitting greenhouse gases and polluting the air. Additionally, the manufacturing process of steel rebars entails the utilization of various chemicals, such as limestone and coke, which, if not adequately managed, can detrimentally affect local ecosystems and water sources. The discharge of pollutants and waste products during steel production can also contribute to water and soil pollution. Furthermore, the transportation of steel rebars from production facilities to construction sites entails environmental implications. Long-distance transportation can result in heightened carbon emissions and energy consumption, particularly when importing rebars from distant locations. To mitigate these environmental impacts, sustainable practices can be implemented in the production and utilization of steel rebars. The recycling of steel is an essential measure in reducing the demand for new production and minimizing the environmental footprint. By employing recycled steel, the energy consumption and greenhouse gas emissions associated with production can be significantly diminished. Moreover, the implementation of efficient transportation methods, such as utilizing rail or waterways instead of trucks, can diminish the carbon footprint of steel rebars. In conclusion, while steel rebars offer durability and longevity in construction, their production and utilization bear significant environmental implications. The adoption of sustainable practices and an emphasis on recycling can help mitigate the negative impacts and render their use more environmentally friendly.
- Q:What is the role of steel rebars in reducing concrete creep?
- Concrete creep, the gradual deformation of concrete over time under sustained loading, is significantly reduced by the incorporation of steel rebars. These high-strength reinforcement bars enhance the structural integrity and durability of concrete structures by providing tensile strength to counteract the forces that cause creep. Under sustained loads, concrete experiences internal stresses that can lead to creep. However, the presence of steel rebars helps distribute these stresses more evenly throughout the structure, acting as reinforcement to absorb and redistribute the tensile forces and minimize concrete deformation. Additionally, steel rebars improve the bond between concrete and reinforcement, ensuring they work together as a composite material. This bond prevents the formation of cracks, which can contribute to creep. Moreover, steel rebars enhance the overall stiffness and rigidity of concrete structures, resisting the deformation caused by creep and maintaining stability over time. In conclusion, steel rebars play a crucial role in reducing concrete creep by providing tensile strength, distributing internal stresses, improving the bond between concrete and reinforcement, and enhancing overall stiffness. Engineers can effectively mitigate the effects of creep and ensure long-term performance and durability by incorporating steel rebars into concrete structures.
- Q:What are the common mistakes to avoid while using steel rebars in construction?
- Some common mistakes to avoid while using steel rebars in construction include inadequate spacing between rebars, incorrect placement of rebars, inadequate cover for rebars, improper anchoring of rebars, and using damaged or rusted rebars.
- Q:What are the factors that determine the strength of steel rebars?
- Several factors contribute to the strength of steel rebars. Firstly, the composition of the steel used in their manufacture plays a crucial role. The presence of elements like carbon, manganese, and silicon significantly impacts the steel's strength by enhancing its ability to resist tension and provide structural stability. Secondly, the manufacturing process of rebars influences their strength. Quenching and tempering, a process involving rapid cooling after heating, is typically employed to achieve the desired strength. The precise temperature and duration of this process affect the grain structure and chemical properties of the steel, thereby impacting the rebars' strength. The size and shape of rebars also affect their strength. The diameter and length of a rebar determine its load-bearing capacity. Thicker and longer rebars generally possess higher strength as they can withstand greater stress and distribute it more effectively. Furthermore, the presence of impurities or defects in the steel can weaken rebars. Cracks, voids, or inclusions compromise the structural integrity of the rebar and reduce its strength. Finally, environmental conditions must be considered when determining the strength of rebars. Factors like temperature, humidity, and exposure to corrosive substances can impact their strength over time. Taking precautions, such as using corrosion-resistant coatings or stainless steel rebars, is essential to ensure the longevity and strength of rebars in such environments. In conclusion, the strength of steel rebars depends on the composition of the steel, the manufacturing process, the size and shape of the rebars, the presence of defects, and the environmental conditions in which they will be used. Considering these factors is crucial to ensure the durability and reliability of steel rebars in construction applications.
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GB STANDARD HIGH QUALITY HOT ROLLED STEEL REINFORCEMENT BAR
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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