Iron Rods For Construction/Concrete Material

Iron Rods For Construction/Concrete Material System 1

Iron Rods For Construction/Concrete Material System 2

Iron Rods For Construction/Concrete Material System 3

Iron Rods For Construction/Concrete Material System 4

Iron Rods For Construction/Concrete Material

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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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Iron Rods For Construction/Concrete Material

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 Iron Rods For Construction/Concrete Material

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.

Iron Rods For Construction/Concrete Material

Packaging & Delivery of the Iron Rods For Construction/Concrete Material

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: Can steel rebars corrode or rust over time?: Yes, steel rebars can corrode or rust over time due to exposure to moisture and oxygen.

Q: Are there any limitations on the maximum spacing between steel rebars in concrete?: Yes, there are limitations on the maximum spacing between steel rebars in concrete. The maximum spacing is determined by various factors such as the structural requirements, load-bearing capacity, and durability of the concrete structure. It is essential to adhere to the specified spacing guidelines to ensure the strength and integrity of the concrete reinforcement.

Q: Can steel rebars be used in pre-tensioned concrete structures?: No, steel rebars cannot be used in pre-tensioned concrete structures. Pre-tensioned concrete structures rely on the use of high-strength tendons made of materials such as high-strength steel or carbon fiber reinforced polymers (CFRP) to apply tension to the concrete before it cures. This pre-tensioning process helps in enhancing the structural strength and load-bearing capacity of the concrete elements. Steel rebars, on the other hand, are used in reinforced concrete structures where they provide additional strength to resist tensile forces.

Q: What are the factors that can cause steel rebars to corrode prematurely?: Premature corrosion of steel rebars can be influenced by various factors. Some of these include: 1. Moisture exposure: The presence of moisture is a primary catalyst for rebar corrosion. Prolonged exposure to water or high humidity levels can lead to rust or oxidation on the rebar surface. 2. Chloride ions: The corrosion process of steel rebars can be accelerated by chloride ions, commonly found in seawater or de-icing salts. These ions can enter the concrete cover and come into contact with the rebar, causing faster corrosion. 3. Carbonation of concrete: Concrete carbonation occurs when atmospheric carbon dioxide reacts with the alkaline components of concrete. This process reduces pH levels, diminishing the concrete cover's ability to passivate and increasing the likelihood of rebar corrosion. 4. Inadequate concrete cover: Insufficient concrete cover exposes rebars to external elements like moisture and chloride ions, leading to accelerated corrosion. Poor construction practices or inadequate design specifications can result in insufficient cover. 5. Poor concrete quality: Low-quality concrete used in construction may contain impurities or lack proper curing, making the concrete more permeable. This allows harmful substances like moisture and chlorides to penetrate easily, causing premature rebar corrosion. 6. Galvanic corrosion: Galvanic corrosion occurs when dissimilar metals come into contact in the presence of an electrolyte, such as moisture. For instance, if steel rebars come in contact with aluminum or copper materials, galvanic corrosion can occur. 7. Construction defects: Issues during the construction phase, such as inadequate workmanship or insufficient protective measures, can contribute to premature rebar corrosion. Examples include poor concrete compaction, improper reinforcement placement, or inadequate waterproofing. To prevent premature corrosion of steel rebars, it is essential to use high-quality materials, ensure adequate concrete cover, apply corrosion-resistant coatings or inhibitors, and employ appropriate construction practices. Regular inspections and maintenance can also help identify and address potential corrosion issues before they worsen.

Q: Can steel rebars be used in bridge construction projects?: Yes, steel rebars can be used in bridge construction projects. They provide strength and reinforcement to the concrete used in bridge construction, making it more durable and capable of withstanding heavy loads and forces.

Q: How many patterns are there in threaded steel?: Rebar is ribbed steel, ribbed steel, including rebar. A ribbed steel bar with 2 longitudinal ribs and uniformly distributed ribs along the length. The transverse rib shape is helical, herringbone, crescent 3. Because of the function of rib, it has better bonding ability with concrete, so it can bear the effect of external force better.

Q: How are steel rebars protected against chemical attacks?: Steel rebars are protected against chemical attacks through a process called corrosion protection. This involves using various techniques and materials to prevent the rebar from coming into contact with corrosive substances that can cause chemical attacks. One common method of protection is the use of protective coatings. This involves applying a layer of material, such as epoxy or zinc, onto the surface of the rebar. These coatings act as a barrier, preventing corrosive substances from reaching the steel surface. Additionally, these coatings can provide an extra layer of protection against moisture and other environmental factors that can contribute to corrosion. Another method of protection is the use of corrosion inhibitors. These are chemicals that can be added to the concrete mix or applied directly to the rebar. Corrosion inhibitors work by forming a protective layer on the surface of the steel, which inhibits the process of corrosion. These inhibitors can be organic or inorganic compounds and are designed to target specific types of corrosion mechanisms. In some cases, stainless steel rebars are used as a measure of protection against chemical attacks. Stainless steel has a higher resistance to corrosion compared to regular steel rebars. This is due to the presence of chromium, which forms a passive layer on the surface of the steel, protecting it from chemical reactions. Stainless steel rebars are often used in highly corrosive environments, such as marine structures or wastewater treatment plants. Regular maintenance and inspection are also crucial in protecting steel rebars against chemical attacks. Any signs of damage or corrosion should be addressed promptly. Regular cleaning and removal of any corrosive substances that accumulate on the rebars can also help prevent chemical attacks. Overall, a combination of protective coatings, corrosion inhibitors, stainless steel rebars, and regular maintenance is essential in protecting steel rebars against chemical attacks. These measures help to extend the lifespan of the rebars and ensure the structural integrity of concrete structures.

Q: What are the guidelines for the proper spacing of steel rebars in columns?: The guidelines for the proper spacing of steel rebars in columns are provided by various national and international codes and standards, such as the American Concrete Institute (ACI) and the British Standards Institution (BSI). These guidelines ensure the structural integrity and durability of the reinforced concrete columns. The spacing of steel rebars in columns is primarily determined by the following factors: 1. Concrete cover: The minimum concrete cover is specified by the codes to protect the steel reinforcement from corrosion and provide fire resistance. The spacing between rebars should be such that the required concrete cover is maintained uniformly around each rebar. 2. Rebar diameter: The size or diameter of the rebars influences their spacing. The codes specify the minimum clear spacing between adjacent rebars based on their diameter to prevent congestion and ensure proper concrete placement. 3. Column dimension: The size and shape of the column also play a significant role in determining the rebar spacing. Larger columns may require additional rebars compared to smaller ones to provide adequate reinforcement and resist the applied loads. 4. Load and design requirements: The design loads, including dead loads, live loads, and seismic loads, impact the spacing of rebars. The codes provide guidelines on the minimum amount of reinforcement required based on the column's dimensions and the anticipated loads. 5. Structural detailing: Proper detailing is essential to ensure the rebars are adequately anchored and lapped to develop the required bond strength. Guidelines for lapping lengths, anchorage lengths, and splices are provided in the codes to ensure the transfer of forces between the rebars and concrete. It is crucial to consult the specific code or standard applicable in your region to determine the exact guidelines for the spacing of steel rebars in columns. Additionally, it is recommended to engage a qualified structural engineer or designer to perform detailed analysis and design of reinforced concrete columns to ensure compliance with the appropriate guidelines and achieve a safe and efficient structural system.

Q: What is the recommended minimum cover for steel rebars in concrete?: The recommended minimum cover for steel rebars in concrete is typically around 1.5 inches (or 40 millimeters). However, specific construction codes and design requirements may vary depending on factors such as environmental conditions, structural considerations, and the intended use of the concrete. It is always advisable to consult the relevant building codes or consult with a structural engineer for the appropriate minimum cover requirements for a particular project.

Q: How do steel rebars contribute to the overall sustainability of the construction industry?: Steel rebars contribute to the overall sustainability of the construction industry in various ways. Firstly, the use of steel rebars enhances the structural integrity and durability of concrete structures, ensuring their longevity and reducing the need for frequent repairs or replacements. This significantly reduces the amount of construction waste generated and minimizes the overall environmental impact. Additionally, steel rebars are recyclable materials, meaning they can be repurposed and reused at the end of their life cycle. This not only reduces the demand for new steel production but also lowers the energy consumption and greenhouse gas emissions associated with the manufacturing process. By promoting the circular economy, steel rebars help conserve natural resources and reduce the carbon footprint of the construction industry. Moreover, the use of steel rebars in concrete structures enhances their resistance to seismic activities and extreme weather conditions, such as hurricanes or earthquakes. This ensures the safety of the occupants and reduces the risk of damage to the infrastructure, thus minimizing the need for reconstruction and contributing to the overall resilience of the built environment. Furthermore, steel rebars can be engineered and designed to optimize the use of materials, reducing the overall weight of structures. This leads to more efficient transportation and installation processes, resulting in lower fuel consumption and transportation-related emissions. Lastly, steel rebars offer flexibility in design and construction, allowing for innovative and sustainable building solutions. They can be easily integrated into various construction methods, enabling the use of sustainable construction techniques such as prefabrication or modular construction. This enhances efficiency, reduces construction time, and minimizes disruption to the surrounding environment. In conclusion, steel rebars play a crucial role in the sustainability of the construction industry by enhancing the durability of structures, promoting recycling, reducing waste generation, conserving resources, improving safety, and enabling innovative construction techniques. Their use contributes to the overall environmental, social, and economic sustainability of the industry, making it a vital component in sustainable construction practices.

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