BS4449 B460B Steel Rebar/Deformed bar Made in China

BS4449 B460B Steel Rebar/Deformed bar Made in China System 1

BS4449 B460B Steel Rebar/Deformed bar Made in China System 2

BS4449 B460B Steel Rebar/Deformed bar Made in China System 3

BS4449 B460B Steel Rebar/Deformed bar Made in China System 4

BS4449 B460B Steel Rebar/Deformed bar Made in China

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 10000 m.t./month

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BS4449 B460B Steel Rebar/Deformed bar Made in China

Details of the BS4449 B460B Steel Rebar/Deformed bar Made in China

Standard & Grade:	GB1499-98 : HRB335,HRB400,HRB500
	BS4449-1997 : GR460,GR500
	CAN/CSA-G30.18-M92 : 400W
	ASTM A615 : Gr.40, Gr.60
Diameter:	6mm;8mm;10mm;12mm;14mm;16mm;18mm;20mm;22mm;25mm;28mm;30mm;32mm;35mm;40mm
Length:	6m,9m,12m
Packing:	Bundle packing
Origin:	China
Application:	Construction,Road,Machinery processing,Welding fields.
Delivery time:	10-25 days
Shipment:	By bulk vessel or Container
Documents:	Mill Test Certificate,Commercial Invoice,Packing List,Certificate of Origin

Company Introduction of the BS4449 B460B Steel Rebar/Deformed bar Made in China

CNBM International Corporation is the most import and export platform of CNBM group(China National Building Material Group Corporation) ,which is a state-owned enterprise, ranked in 270th of Fortune Global 500 in 2015.

With its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high quality series of refractories as well as technical consultancies and logistics solution.

BS4449 B460B Steel Rebar/Deformed bar Made in China

Packaging & Delivery of the BS4449 B460B Steel Rebar/Deformed bar Made in China

Packaging Detail	Sea worthy packing /as per customer's packing instruction
Delivery Detail	15 ~ 40 days after receiving the deposit

FAQ

Are you a trading company or manufacturer?	Manufacturer
What’s the MOQ?	1000m2
What’s your delivery time?	15-20 days after downpayment received
Do you Accept OEM service?	Yes
what’s your delivery terms?	FOB/CFR/CIF
What's the Payment Terms?	30% as deposit,70% before shipment by T/T
	Western Union acceptable for small amount.
	L/C acceptable for large amount.
	Scrow ,Paybal,Alipay are also ok
Why choose us?	Chose happens because of quality, then price, We can give you both. Additionally, we can also offer professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposals.
Why choose us?
What's your available port of Shipment?	Main Port, China
What’s your featured services?	Our service formula: good quality+ good price+ good service=customer's trust
What’s your featured services?
Where are your Market?	Covering more than 160 countries in the world

Q: What are the guidelines for inspecting and testing steel rebars on-site?: To ensure the structural integrity and safety of a construction project, it is essential to conduct on-site inspections and tests on steel rebars. Here are some guidelines to consider: 1. Begin with a visual inspection, checking for any visible defects such as rust, cracks, or deformities. Also, ensure that the rebars' size, shape, and alignment comply with the project's specifications and standards. 2. Keep accurate documentation of the rebars, including their origin, grade, and dimensions. This information will help track compliance with the project's requirements and identify any potential issues. 3. Take representative samples from each batch of rebars for further testing. The number of samples required may vary depending on the project's specifications and regulatory requirements. 4. Verify compliance with the project's requirements by measuring the rebars' length, diameter, and shape. Ensure that they are within the permissible limits and not bent or twisted excessively. 5. Conduct a chemical composition analysis to ensure that the rebars meet the specified standards. This analysis typically involves testing for elements like carbon, sulfur, phosphorus, and manganese. 6. Determine the rebars' mechanical properties through tensile and yield strength tests. This testing helps ensure that the rebars can withstand the expected loads and stresses during construction. 7. Assess the rebars' ductility and ability to withstand bending without fracture or significant deformation through a bend test. This test is particularly important for rebars used in reinforced concrete structures. 8. Use ultrasonic testing techniques to detect any internal defects that may affect the rebars' performance. These defects, such as voids, cracks, or inclusions, may not be visible to the naked eye. 9. Evaluate the rebars' resistance to corrosion, especially in moisture or chemically exposed environments. This assessment may involve techniques such as measuring corrosion potential or analyzing chloride content. 10. Keep comprehensive records of all inspection and testing activities, including test results and any deviations from the project's specifications. This documentation acts as evidence of compliance and aids in future audits or quality control checks. It is important to note that these guidelines provide a general framework for on-site inspection and testing of steel rebars. Always refer to specific project requirements, industry standards, and local regulations for a more detailed and accurate procedure.

Q: How are steel rebars protected against alkali attacks?: Steel rebars are protected against alkali attacks through the use of various techniques and materials. One common method is to apply a protective coating on the surface of the rebars. This coating acts as a barrier, preventing direct contact between the alkaline environment and the steel. Some commonly used coatings include epoxy, zinc, and polyethylene. These coatings are designed to be durable and provide long-term protection against alkali attacks. Another method of protection is through the use of corrosion inhibitors. These inhibitors are added to the concrete mixture during construction. They work by reducing the corrosive effects of alkali on the steel rebars. Corrosion inhibitors form a protective film on the surface of the steel, preventing the alkali from reaching the rebar and causing damage. In addition to coatings and corrosion inhibitors, proper concrete mix design can also play a significant role in protecting rebars against alkali attacks. By optimizing the composition of the concrete mix, engineers can reduce the alkalinity of the environment surrounding the rebars. This helps to minimize the risk of alkali attacks and subsequent corrosion. Regular maintenance and inspection of structures is crucial in ensuring the continued protection of steel rebars against alkali attacks. Monitoring the condition of the rebars and taking prompt action in case of any signs of corrosion or damage is essential for their long-term durability. Overall, a combination of protective coatings, corrosion inhibitors, proper concrete mix design, and regular maintenance are key factors in safeguarding steel rebars against alkali attacks. By implementing these measures, the lifespan and structural integrity of concrete structures can be significantly extended.

Q: What are the guidelines for the proper installation of steel rebars?: The proper installation of steel rebars is crucial for ensuring the structural integrity and durability of reinforced concrete structures. Here are some guidelines to follow for their proper installation: 1. Planning and Design: Before beginning the installation, it is important to have a detailed plan and design in place. This includes determining the required rebar size, spacing, and configuration based on the structural requirements and specifications. Consulting structural engineers and adhering to local building codes and regulations is essential. 2. Cutting and Bending: Rebars should be cut and bent accurately according to the design specifications. Proper tools such as rebar cutters and benders should be used to ensure clean cuts and precise bends. Any damaged or corroded rebars should be discarded and replaced. 3. Cleaning and Preparation: The surface of the rebars must be free from any contaminants like rust, oil, dirt, or loose scales before installation. Cleaning the rebars using wire brushes or air blasting is recommended to ensure proper adhesion between the rebar and concrete. 4. Placement and Positioning: The rebars should be placed and positioned accurately as per the design drawings. They should be securely tied or supported using tie wires or rebar chairs to maintain the desired spacing and alignment. Splices should be made in accordance with the design requirements and properly lapped to ensure continuity and strength. 5. Concrete Cover: The rebars should be adequately covered with concrete to protect them from corrosion and provide fire resistance. The concrete cover thickness should meet the design specifications and local building codes. Proper spacing between rebars and formwork should be maintained to allow proper concrete flow and consolidation. 6. Anchorage and Embedment: Adequate anchorage and embedment of rebars are essential for transferring loads and ensuring structural stability. Special care should be taken to provide proper hooks, bends, or mechanical anchorage at the ends of rebars as per the design requirements. The rebars should be properly embedded into the adjacent concrete elements to achieve the desired bond strength. 7. Inspection and Quality Control: Regular inspection should be carried out during the installation process to ensure compliance with the design specifications and quality standards. Any deviations or defects should be identified and rectified promptly. It is important to document the installation process and maintain proper records for future reference. By following these guidelines, the proper installation of steel rebars can be achieved, ensuring the structural strength, longevity, and safety of reinforced concrete structures.

Q: What is the effect of carbon content on the strength of steel rebars?: The carbon content in steel rebars has a significant effect on their strength. Generally, a higher carbon content increases the strength of the steel rebars. This is because carbon atoms strengthen the iron lattice structure in the steel, making it harder and more resistant to deformation or breaking under stress. However, excessively high carbon content can lead to brittleness, reducing the overall toughness and ductility of the rebars. Therefore, finding the right balance of carbon content is crucial to ensure optimal strength and structural integrity of steel rebars.

Q: What are the different grades of steel rebars available?: There are several different grades of steel rebars available in the market, each with specific characteristics and applications. The most commonly used grades include: 1. Grade 40: This is a low-strength rebar, suitable for general construction purposes where high tensile strength is not required. It is commonly used in residential buildings, sidewalks, and driveways. 2. Grade 60: This is a medium-strength rebar, offering higher tensile strength than Grade 40. It is widely used in commercial buildings, bridges, and infrastructure projects. Grade 60 rebar provides excellent reinforcement for heavy loads and structural stability. 3. Grade 75: This is a high-strength rebar, often used in challenging construction projects that require exceptional tensile strength. It is commonly utilized in high-rise buildings, parking garages, and industrial structures to ensure superior reinforcement and structural integrity. 4. Grade 80 and above: These are ultra-high-strength rebars designed for specialized applications where extreme load-bearing capacity is necessary. They are commonly used in heavy-duty infrastructure projects, such as dams, tunnels, and nuclear power plants, where the demand for strength is significantly higher. The choice of steel rebar grade depends on factors such as the specific construction project, load-bearing requirements, and environmental conditions. Engineers and architects evaluate these factors to determine the most suitable grade of steel rebar for a particular application, ensuring optimal performance and structural durability.

Q: Can steel rebars be replaced with other reinforcement materials?: Yes, steel rebars can be replaced with other reinforcement materials. While steel rebars have been widely used in construction for their strength and durability, alternative materials have been developed that offer similar or even improved properties. One such alternative is fiber-reinforced polymer (FRP) bars, which are made of high-strength fibers embedded in a polymer matrix. FRP bars are lightweight, corrosion-resistant, and have a high tensile strength, making them an attractive replacement for steel rebars. They are also non-conductive and non-magnetic, making them suitable for use in areas with electromagnetic interference or in sensitive industries such as electronics. Another alternative is carbon fiber reinforced polymer (CFRP) bars, which are similar to FRP bars but are specifically reinforced with carbon fibers. CFRP bars offer even higher tensile strength and stiffness compared to steel rebars, making them particularly suitable for structures that require exceptional load-bearing capabilities. Furthermore, natural fiber reinforced composites (NFRC) have also been explored as a replacement for steel rebars. NFRC can be made from materials such as bamboo, jute, or sisal fibers embedded in a matrix material like cement or polymer. These natural fibers offer good tensile strength and can be a sustainable and cost-effective alternative to steel rebars, especially in regions where these fibers are abundantly available. In conclusion, while steel rebars have been the traditional choice for reinforcement materials in construction, alternatives such as FRP bars, CFRP bars, and NFRC can be viable substitutes. The choice of reinforcement material depends on various factors such as structural requirements, environmental conditions, and cost-effectiveness.

Q: What are the different types of corrosion protection coatings for steel rebars?: There are several types of corrosion protection coatings available for steel rebars, each offering different levels of protection and durability. 1. Epoxy Coatings: Epoxy coatings are one of the most common and effective corrosion protection coatings for steel rebars. They provide a thick, durable barrier that prevents moisture and corrosive substances from reaching the steel surface. Epoxy coatings can be applied by spray, brush, or dip methods and provide excellent adhesion and resistance to chemicals. 2. Zinc Coatings: Zinc coatings, such as hot-dip galvanization or zinc-rich paint, are another popular choice for corrosion protection. These coatings create a sacrificial barrier, where the zinc corrodes instead of the steel rebar. Zinc coatings are highly effective in preventing corrosion, even in harsh environments, and can be applied in various thicknesses depending on the level of protection required. 3. Fusion-Bonded Epoxy (FBE) Coatings: FBE coatings are commonly used in underground or submerged applications. These coatings are applied by heating the steel rebar, which causes the epoxy powder to melt and bond to the surface. FBE coatings provide excellent corrosion resistance and are resistant to chemicals, abrasion, and impact. 4. Polymer Coatings: Polymer coatings, such as polyurethane or polyethylene, are often used in high-temperature environments or where chemical resistance is required. These coatings provide a protective barrier that is resistant to UV radiation, abrasion, and chemicals. Polymer coatings can be applied by spray or dip methods and offer good adhesion to the steel surface. 5. Concrete Coatings: In reinforced concrete structures, the concrete itself can act as a corrosion protection coating for the steel rebars. The high alkalinity of concrete creates a protective layer around the steel, known as the passivating layer, which helps prevent corrosion. Additionally, the use of corrosion inhibitors in the concrete mix can enhance the corrosion protection of steel rebars. It is important to select the appropriate corrosion protection coating based on the specific environmental conditions, intended application, and required durability. Consulting with experts or engineers experienced in corrosion protection can help determine the most suitable coating for steel rebars in a given situation.

Q: How are steel rebars transported to the construction site?: Various methods are employed for the transportation of steel rebars, also known as reinforcing bars, to construction sites. One commonly used approach involves the use of trucks. The rebars are loaded onto flatbed trucks or trailers and firmly secured with straps or chains to prevent any shifting during transit. These trucks are specially designed to withstand the weight and length of the rebars, boasting robust frames and loading mechanisms. Another method is rail transportation. Steel rebars can be loaded onto rail cars, either on flatcars or in specialized containers, and transported to the construction site. This method proves particularly advantageous for long-distance transportation, as it offers a more cost-effective and efficient solution for large quantities of rebars. For construction projects situated near waterways, the transportation of rebars can also be accomplished by sea or barge. The rebars are loaded onto ships or barges and properly secured to prevent any damage or movement during transit. This method is commonly employed for projects necessitating substantial quantities of rebars or for construction sites located on islands or in coastal areas. Upon arrival at the construction site, cranes or forklifts are typically utilized to unload the steel rebars. These rebars are then either stored in designated areas or immediately employed for reinforcement in the construction process. It is of utmost importance to handle the transportation of rebars with caution, as this ensures their structural integrity and guards against potential accidents or damage during transit.

Q: What are the guidelines for ensuring proper concrete cover over steel rebars?: To ensure the long-term durability and performance of reinforced concrete structures, it is crucial to have the appropriate concrete cover over steel rebars. Here are some tips to achieve the correct cover: 1. Compliance with building codes and specifications is essential. These regulations establish minimum requirements for concrete cover over steel rebars to ensure structural integrity, fire resistance, and corrosion resistance. It is important to consult and adhere to the applicable codes and specifications for your project. 2. Determine the required concrete cover based on factors such as environmental conditions, exposure to aggressive agents, structural design, and reinforcement type. Structural engineers typically assess these factors to determine the necessary cover and protect the rebars adequately. 3. Carefully select the concrete mix design to achieve the desired strength, durability, and workability. Consider factors like the quality and size of aggregates, cement content, water-to-cement ratio, and use of additives or admixtures. A well-designed mix will promote proper bonding and sufficient protection of the rebars. 4. Maintain proper construction practices. This includes using appropriate formwork and reinforcement placement techniques, ensuring correct concrete placement, compaction, and curing. Proper positioning and secure tying of the rebars are crucial to maintain the required cover and prevent displacement during concrete pouring. 5. Regular inspections and monitoring during construction are necessary. Check the placement of reinforcement, cover thickness, and overall concrete quality. Address and rectify any deviations from the specified requirements promptly. 6. Protect against corrosion. Adequate concrete cover helps prevent corrosion, but additional measures can enhance durability. Consider using corrosion-resistant rebars, applying epoxy coatings, or utilizing corrosion inhibitors to further protect the reinforced concrete structure. 7. Document and maintain records of the construction process, including reinforcement placement, cover thickness, and any modifications made. This documentation will be useful for future reference, maintenance, and repairs. By following these guidelines, you can ensure the appropriate concrete cover over steel rebars, resulting in durable and structurally sound reinforced concrete structures. It is always advisable to consult with structural engineers and construction professionals to meet specific project requirements and comply with local building codes and regulations.

Q: Are steel rebars suitable for use in structures with high resistance to impact?: Steel rebars are generally suitable for use in structures with high resistance to impact. Rebars, also known as reinforcement bars, are made from steel and are commonly used in concrete structures to enhance their strength and durability. Steel is known for its high tensile strength and ability to absorb and distribute impact forces, making it an ideal material for reinforcement. In structures that are prone to impact, such as bridges, highways, or buildings located in earthquake-prone areas, steel rebars play a critical role in providing additional strength and resistance. The use of rebars ensures that the structure can withstand sudden impact loads and prevent catastrophic failures. Moreover, steel rebars are available in various grades and sizes, allowing engineers to select the appropriate type of rebar based on the specific requirements of the structure. Higher grade rebars, such as Grade 60 or Grade 75, offer increased strength and ductility, making them even more suitable for structures with high resistance to impact. It is important to note that while steel rebars enhance the overall strength and impact resistance of a structure, other factors such as design, construction techniques, and maintenance also play vital roles in ensuring the structure's ability to withstand impact forces. Therefore, a comprehensive approach that considers all these factors is essential in designing and constructing structures with high resistance to impact.

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