HRB400 Deformed Steel Bar 12m Rebar for Construction

HRB400 Deformed Steel Bar 12m Rebar for Construction System 1

HRB400 Deformed Steel Bar 12m Rebar for Construction System 2

HRB400 Deformed Steel Bar 12m Rebar for Construction System 3

HRB400 Deformed Steel Bar 12m Rebar for Construction System 4

HRB400 Deformed Steel Bar 12m Rebar for Construction

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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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HRB400 Deformed Steel Bar 12m Rebar for Construction

Details of the HRB400 Deformed Steel Bar 12m Rebar for Construction

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 HRB400 Deformed Steel Bar 12m Rebar for Construction

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.

HRB400 Deformed Steel Bar 12m Rebar for Construction

Packaging & Delivery of the HRB400 Deformed Steel Bar 12m Rebar for Construction

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:How do steel rebars affect the durability of concrete in freeze-thaw cycles?: The durability of concrete in freeze-thaw cycles can be greatly enhanced by steel rebars. When exposed to freezing and thawing conditions, concrete undergoes expansion and contraction. During freezing, the water inside the concrete pores freezes and expands, exerting pressure on the surrounding concrete matrix. This can lead to cracks and deterioration of the concrete. However, the inclusion of steel rebars in the concrete can help alleviate these problems. Steel has a lower coefficient of thermal expansion compared to concrete, meaning it expands and contracts less with temperature changes. This property allows the steel rebars to absorb the stresses generated during freeze-thaw cycles, preventing significant damage to the concrete structure. Furthermore, steel rebars also reinforce the concrete, increasing its overall strength and toughness. This reinforcement helps distribute the stresses caused by freeze-thaw cycles more evenly throughout the concrete, reducing the likelihood of crack formation or propagation. Moreover, steel rebars act as a barrier against water penetration into the concrete. Moisture is a major contributor to freeze-thaw damage. The steel rebars assist in creating a more impermeable concrete structure by reducing the size and number of cracks, preventing water from entering and causing further deterioration. To sum up, steel rebars play a vital role in enhancing the durability of concrete in freeze-thaw cycles. Their ability to absorb stresses, reinforce the concrete, and prevent water penetration significantly reduces the potential for damage and extends the lifespan of the concrete structure.

Q:What are the common mistakes to avoid when installing steel rebars?: To ensure a successful and safe installation of steel rebars, it is important to avoid several common mistakes: 1. Placing the rebars incorrectly is a frequent error that must be avoided. Accurate placement should be carried out in accordance with the engineering or construction drawings. Any deviation from the specified location can compromise the structural integrity of the reinforced concrete. 2. Insufficient concrete cover over the rebars is another mistake to avoid. The cover acts as a protective layer, preventing corrosion and providing fire resistance. Inadequate cover can lead to premature deterioration and structural failure over time. 3. Proper support for the rebars is crucial during the concrete pouring process. Insufficient support can cause sagging or movement of the rebars, resulting in an uneven distribution of steel reinforcement and compromising the structural strength of the concrete. 4. Correct alignment and spacing of the rebars according to design specifications is essential. Improper alignment can lead to congestion, difficulties in pouring concrete, and compromised bond strength between the rebar and concrete. Similarly, incorrect spacing can result in insufficient reinforcement, reducing the overall strength of the structure. 5. Thoroughly cleaning the rebars before installation is necessary to remove rust, dirt, and other contaminants. Failure to do so can lead to poor bond strength and an increased risk of corrosion, weakening the structure over time. 6. Adequate tying of the rebars using the appropriate wire or connectors is essential to maintain alignment and ensure the structural integrity of the reinforced concrete. Neglecting proper tying can result in shifting or movement during the concrete pouring process, compromising the structural strength. 7. Lack of supervision and quality control during the installation process is a common mistake. Experienced personnel should oversee the installation to ensure compliance with design specifications, proper installation techniques, and adherence to safety guidelines. By avoiding these common mistakes, the installation of steel rebars can be carried out effectively, resulting in a strong, durable, and safe reinforced concrete structure.

Q:How are steel rebars used in the construction of tunnels and underground passages?: Steel rebars are used in the construction of tunnels and underground passages to reinforce the concrete structures. They are embedded within the concrete to increase its strength and prevent cracking or collapsing under the pressure exerted by the surrounding soil or water. The rebars provide structural integrity and durability, ensuring the tunnels and passages can withstand the forces and stresses they encounter.

Q:What are the different types of steel rebars used in road constructions?: Road constructions commonly utilize various types of steel rebars. These include: 1. Mild steel rebars: These are the most frequently employed rebars in road constructions. They consist of low carbon steel and possess a smooth surface. Mild steel rebars are renowned for their durability and strength, making them suitable for a range of road construction applications. 2. High-strength rebars: Crafted from high-strength steel, these rebars possess a greater yield strength compared to mild steel rebars. They are utilized in road constructions that require enhanced load-bearing capacity, such as bridges and highways. 3. Epoxy-coated rebars: These rebars are coated with epoxy resin to enhance their resistance to corrosion. They are commonly used in road constructions in areas exposed to moisture and chemicals, such as coastal regions. 4. Galvanized rebars: These rebars feature a zinc coating that provides protection against corrosion. They are particularly suitable for road constructions in regions with high humidity or a high risk of corrosion. 5. Stainless steel rebars: Constructed from stainless steel, these rebars exhibit exceptional corrosion resistance. They are frequently employed in road constructions that necessitate long-term durability and resistance to corrosion, such as tunnels and underground structures. Selecting the appropriate type of steel rebar for road constructions is crucial and should be based on specific project requirements, including load-bearing capacity, exposure to corrosion, and environmental conditions. Consulting structural engineers and adhering to local construction codes and standards is essential to ensure the successful implementation of road construction projects.

Q:Can steel rebars be used in structures with high chemical resistance requirements?: No, steel rebars cannot be used in structures with high chemical resistance requirements as they are susceptible to corrosion and deterioration when exposed to harsh chemicals.

Q:How do steel rebars affect the overall crack resistance of concrete structures?: The crack resistance of concrete structures is greatly improved by steel rebars, which have a crucial role to play. When embedded in concrete, rebars provide reinforcement and boost the tensile strength of the structure. While concrete is naturally strong in compression, it is weak in tension, and rebars help overcome this weakness by absorbing the tensile forces that may result in cracks. The inclusion of rebars in concrete structures allows for stress redistribution, thereby preventing cracks from spreading. As concrete shrinks or experiences external loads, rebars act as a reinforcement grid, effectively resisting the formation and expansion of cracks. By absorbing and dispersing the tensile stresses, rebars ensure that the concrete remains intact and can withstand heavier loads without significant cracking. Furthermore, steel rebars contribute to the overall durability of concrete structures. When rebars corrode due to exposure to moisture or other environmental factors, they can increase in volume, resulting in internal pressure and potential cracking of the concrete. However, the use of corrosion-resistant rebars, such as epoxy-coated or stainless steel rebars, can greatly reduce this risk and enhance the crack resistance of the structure. To summarize, steel rebars enhance the crack resistance of concrete structures by providing reinforcement, increasing tensile strength, redistributing stress, and preventing crack propagation. Their presence guarantees that the structure can withstand various types of loads and environmental conditions, ultimately improving the strength and durability of the concrete.

Q:What are the factors to consider while designing a reinforced concrete structure with steel rebars?: Designing a reinforced concrete structure with steel rebars requires careful consideration of various factors to ensure its strength, durability, and safety. Here are some key factors to consider: 1. Structural Requirements: The first step is to determine the specific purpose of the structure and its load-bearing capacity. This includes considering the intended use, maximum load, and any potential dynamic loads such as wind or earthquakes. 2. Material Selection: Choosing the right type and grade of concrete and steel rebars is crucial. The concrete mix should have adequate strength, workability, and durability to withstand the anticipated conditions. Similarly, the rebars should have sufficient yield strength and corrosion resistance to maintain structural integrity over time. 3. Reinforcement Layout: The design should include an appropriate layout and spacing of rebars to distribute the load uniformly and prevent cracking or structural failure. This involves determining the rebar size, quantity, and arrangement based on the calculated forces and bending moments. 4. Concrete Cover: The concrete cover refers to the thickness of concrete surrounding the rebars. It is crucial to provide adequate cover to protect the rebars from corrosion, fire, and other environmental factors. The cover thickness should be determined based on the exposure conditions and the required durability. 5. Bonding between Concrete and Rebars: Proper bonding between the concrete and rebars is essential for transferring forces effectively. The design should consider factors such as mechanical interlocking, chemical adhesion, and surface treatment to ensure a strong bond and prevent slippage or separation. 6. Construction Considerations: The design should account for practical construction aspects such as formwork, placement, and compaction of concrete. It should also incorporate appropriate detailing for construction joints, lap splices, and anchorage of rebars to ensure proper installation and ease of construction. 7. Serviceability and Durability: The design should address serviceability requirements such as deflection limits, cracking control, and long-term performance. Additionally, it should consider factors that impact durability, such as exposure to moisture, chemicals, temperature variations, and potential for corrosion. 8. Quality Control and Inspection: Quality control measures, including testing of materials, monitoring during construction, and inspection of completed work, are crucial to ensure that the design requirements are met. Regular inspections and adherence to construction standards and codes are essential for the overall integrity and safety of the structure. By considering these factors and following appropriate design codes and standards, a reinforced concrete structure with steel rebars can be designed to provide the desired strength, durability, and safety throughout its lifespan.

Q:What is the effect of corrosion on the strength of steel rebars?: The effect of corrosion on the strength of steel rebars is detrimental. Corrosion weakens the steel rebars by causing the formation of rust and ultimately leading to the loss of structural integrity. As corrosion progresses, the rebars may become brittle, reducing their load-bearing capacity and increasing the risk of structural failure. Therefore, regular inspection, maintenance, and corrosion prevention measures are crucial to ensure the strength and durability of steel rebars in construction projects.

Q:How do steel rebars contribute to the overall resistance against natural disasters?: Steel rebars contribute to the overall resistance against natural disasters in various ways. Firstly, steel rebars are extensively used in reinforced concrete structures such as buildings, bridges, and dams, which are designed to withstand natural disasters like earthquakes and hurricanes. The addition of steel rebars increases the structural integrity of these concrete elements, making them more resistant to the forces exerted by such disasters. During earthquakes, the flexible nature of steel rebars allows them to absorb and distribute the seismic energy throughout the structure. This helps in dissipating the destructive forces and reducing the chances of collapse or severe damage. The presence of steel rebars also enhances the ductility of reinforced concrete structures, which means they can deform and flex without breaking, thus improving their overall resilience against seismic events. In the case of hurricanes or strong winds, steel rebars provide additional strength and stability to concrete structures. They act as reinforcement, preventing the concrete from cracking or crumbling under the pressure of high winds. The combination of the tensile strength of steel and the compressive strength of concrete creates a robust and durable structure that can withstand the powerful forces generated by hurricanes. Furthermore, steel rebars play a crucial role in the construction of flood-resistant structures. During flooding events, the strength and corrosion resistance of steel rebars ensure the structural integrity of buildings and other infrastructure, preventing them from being severely damaged or washed away. The use of steel rebars in flood-prone areas helps in creating resilient structures that can withstand the erosive forces of water and remain intact. Overall, steel rebars significantly contribute to the overall resistance against natural disasters by enhancing the strength, durability, and flexibility of concrete structures. Their presence improves the structural integrity and resilience of buildings, bridges, and other infrastructure, making them more capable of withstanding the destructive forces unleashed by earthquakes, hurricanes, and floods.

Q:What is the lifespan of steel rebars in concrete structures?: The lifespan of steel rebars in concrete structures can vary depending on several factors such as the quality of the steel, the environment in which the structure is located, and the level of maintenance. However, with proper design, construction, and maintenance, steel rebars in concrete structures can typically last for several decades to over a century.

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