Deformed bars in Grade HRB400 with High Quality

Deformed bars in Grade HRB400 with High Quality System 1

Deformed bars in Grade HRB400 with High Quality

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 100000 m.t./month

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Product Description:

Specifications of HRB400 Deformed Steel Bar:

Standard	GB	HRB400
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Place of origin	Hebei, China mainland
Advantages	exact size, regular package, chemical and mechanical properties are stable.
Type	Hot rolled deformed steel bar
Brand name	DRAGON

Chemical Composition: (Please kindly find our chemistry of our material based on HRB500 as below for your information)

Grade	Technical data of the original chemical composition (%)
	C	Mn	Si	S	P		V
HRB400	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045		0.04-0.12
	Physical capability
	Yield Strength (N/cm²)		Tensile Strength (N/cm²)			Elongation (%)
	≥400		≥570			≥14

Theoretical weight and section area of each diameter as below for your information:

Diameter(mm)	Section area (mm²)	Mass(kg/m)	Weight of 12m bar(kg)
6	28.27	0.222	2.664
8	50.27	0.395	4.74
10	78.54	0.617	7.404
12	113.1	0.888	10.656
14	153.9	1.21	14.52
16	201.1	1.58	18.96
18	254.5	2.00	24
20	314.2	2.47	29.64
22	380.1	2.98	35.76
25	490.9	3.85	46.2
28	615.8	4.83	57.96
32	804.2	6.31	75.72
36	1018	7.99	98.88
40	1257	9.87	118.44
50	1964	15.42	185.04

Usage and Applications of HRB400 Deformed Steel Bar:

Deformed bar is widely used in buildings, bridges, roads and other engineering construction. Big to highways, railways, bridges, culverts, tunnels, public facilities such as flood control, dam, small to housing construction, beam, column, wall and the foundation of the plate, deformed bar is an integral structure material. With the development of world economy and the vigorous development of infrastructure construction, real estate, the demand for deformed bar will be larger and larger..

Packaging & Delivery of HRB400 Deformed Steel Bar:

Packaging Detail: products are packed in bundle and then shipped by container or bulk vessel, deformed bar is usually naked strapping delivery, when storing, please pay attention to moisture proof. The performance of rust will produce adverse effect.

Each bundle weight: 2-3MT, or as required

Payment term: TT or L/C

Delivery Detail: within 45 days after received advanced payment or LC.

Label: to be specified by customer, generally, each bundle has 1-2 labels

Trade terms: FOB, CFR, CIF

Q:What is the role of steel rebars in reducing concrete shrinkage?: Steel rebars play a crucial role in reducing concrete shrinkage by providing reinforcement and added strength to the concrete structure. When concrete cures, it undergoes a process called hydration, where it loses water and shrinks in volume. This shrinkage can lead to cracking and overall structural instability. By placing steel rebars within the concrete, they act as a reinforcement and help to counteract the forces of shrinkage. The rebars provide tensile strength, which is the ability to resist pulling or stretching forces. As the concrete shrinks, the rebars hold it together and prevent excessive cracking. Additionally, the steel rebars help to distribute the load more evenly throughout the concrete structure. This reduces the concentration of stress in specific areas, further minimizing the potential for shrinkage-related cracking. Furthermore, steel rebars can also act as a thermal conductor, allowing heat to dissipate more evenly throughout the concrete. This helps to prevent temperature differentials within the structure, which can lead to differential shrinkage and subsequent cracking. In summary, the role of steel rebars in reducing concrete shrinkage is to provide reinforcement, resist tensile forces, distribute loads, and regulate temperature differentials. By doing so, they enhance the overall durability and stability of the concrete structure, minimizing the negative effects of shrinkage.

Q:How do steel rebars affect the bond strength between concrete and reinforcement?: Steel rebars play a crucial role in enhancing the bond strength between concrete and reinforcement. The presence of rebars in concrete structures creates a mechanical interlock between the two materials, resulting in a stronger and more durable bond. Firstly, rebars provide a larger surface area for the concrete to adhere to. The rough texture of the steel surface allows the fresh concrete to bond effectively, creating a strong bond. This increased surface area also helps to distribute loads more evenly, reducing stress concentrations and enhancing the overall structural integrity of the concrete. Secondly, rebars act as a load transfer medium, transmitting forces between the concrete and reinforcement. As the concrete experiences tensile forces, which it is inherently weak in resisting, the rebars bear these forces and effectively carry them across the concrete-rebar interface. This prevents cracks from propagating and helps to maintain the overall stability and strength of the structure. Moreover, the presence of rebars helps to control cracking in concrete. As the concrete undergoes shrinkage or temperature variations, it tends to crack. However, with the presence of rebars, these cracks are restricted or minimized. The rebars act as reinforcement, holding the concrete together and preventing crack propagation. Additionally, steel rebars improve the bond strength by providing anchorage. The embedment of rebars into the concrete creates a mechanical connection, preventing the rebar from slipping or pulling out. This anchorage ensures that the bond between the concrete and reinforcement remains intact, even under high loads or external forces. In summary, steel rebars significantly enhance the bond strength between concrete and reinforcement. They provide a larger surface area for adhesion, act as load transfer mediums, control cracking, and offer anchorage, ensuring a stronger and more durable bond. Their presence contributes to the overall stability and longevity of concrete structures.

Q:How do steel rebars affect the structural capacity of concrete beams and columns?: Steel rebars greatly enhance the structural capacity of concrete beams and columns. By reinforcing the concrete, rebars increase its tensile strength, allowing it to withstand greater loads and prevent cracking or failure. The combination of steel rebars and concrete creates a more robust and durable structure, ensuring its ability to bear heavy loads and withstand external forces.

Q:Can steel rebars be used in road or highway construction?: Road or highway construction can utilize steel rebars. Reinforcing bars, also known as steel rebars, are commonly employed in the construction sector to bolster the strength and support of concrete structures. In the realm of road and highway construction, rebars are typically utilized in the creation of reinforced concrete pavements, bridge decks, and retaining walls. By embedding rebars in concrete, its tensile strength can be enhanced, as concrete is robust in compression but weak in tension. The addition of rebars to the concrete aids in distributing tensile forces, thus enhancing the overall longevity and load-bearing capacity of road or highway infrastructure. The utilization of steel rebars in road or highway construction presents numerous advantages. Firstly, it enhances the structural integrity and lifespan of the infrastructure, as reinforced concrete structures are better equipped to withstand heavy traffic loads, temperature fluctuations, and environmental factors. Secondly, rebars assist in mitigating cracking and deterioration of the concrete, thereby reducing the necessity for frequent repairs and maintenance. Additionally, the utilization of rebars allows for more efficient and cost-effective construction, as it permits the use of thinner concrete sections without compromising strength. All in all, steel rebars are an indispensable component in road or highway construction, as they provide the essential reinforcement to ensure the strength, durability, and longevity of the infrastructure.

Q:Are steel rebars resistant to chemical attacks?: The resistance of steel rebars to chemical attacks may vary depending on the specific chemicals they encounter, although they are typically resistant. Steel rebars are primarily composed of carbon steel, renowned for its exceptional strength and durability. Carbon steel exhibits good resistance to numerous common chemicals, including water, mild acids, and alkalis. Nevertheless, certain chemicals can pose a threat to steel rebars by inducing corrosion or deterioration. For instance, powerful acids like sulfuric acid or hydrochloric acid can swiftly corrode steel rebars. Furthermore, exposure to chlorides, such as those present in saltwater or deicing salts, can heighten the risk of corrosion in steel rebars. To bolster the resistance of steel rebars against chemical attacks, several protective measures can be implemented. One prevalent approach involves the application of protective coatings, such as epoxy or zinc, onto the rebars. These coatings create a barrier between the steel and the chemicals, preventing direct contact and reducing the likelihood of corrosion. In conclusion, although steel rebars generally exhibit resistance to chemical attacks, their resistance can be influenced by the specific chemicals they encounter. By implementing appropriate protective measures, their resistance can be enhanced, thus prolonging their lifespan in environments where chemical exposure is a concern.

Q:How are steel rebars used in foundation construction?: Steel rebars are commonly used in foundation construction to provide strength and reinforcement to concrete structures. They are placed within the concrete to resist tension forces and prevent cracking or failure. The rebars help to distribute loads evenly and improve the overall durability and stability of the foundation.

Q:What are the guidelines for spacing steel rebars in reinforced concrete?: The guidelines for spacing steel rebars in reinforced concrete vary depending on the specific design and requirements of the project. However, some general guidelines include maintaining a minimum spacing between rebars to allow for proper concrete flow and consolidation during placement, typically ranging from 1.5 to 2.5 times the diameter of the bar. Additionally, rebars should be adequately spaced to ensure proper cover and to prevent overcrowding, which can hinder the structural integrity of the concrete. It is crucial to consult the project's structural engineer or refer to the relevant building codes and standards for specific spacing requirements.

Q:How are steel rebars protected against extreme weather conditions?: Steel rebars are protected against extreme weather conditions through various methods such as epoxy coating, galvanization, and concrete cover. These protective measures prevent corrosion and degradation of the rebars, ensuring their durability and strength even in harsh weather conditions.

Q:How are steel rebars different from other types of reinforcement?: The composition and strength of steel rebars set them apart from other types of reinforcement. Unlike fiberglass or carbon fiber, which are commonly used for reinforcement, steel rebars are made of steel, giving them exceptional strength and durability. One notable distinction between steel rebars and other reinforcement types is their capacity to withstand high tensile forces. Steel possesses a high tensile strength, allowing it to resist stretching or being pulled apart. This characteristic makes steel rebars ideal for reinforcing concrete structures that experience significant tensile loads, such as bridges, buildings, and highways. Another unique feature of steel rebars is their ability to bond effectively with concrete. The ridges or deformations on the rebars' surface enhance adhesion between the steel and concrete, facilitating efficient load transfer. This bond ensures that the concrete and steel work together as a composite material, enhancing the overall strength and structural integrity of the reinforced concrete structure. Steel rebars also offer versatility in terms of shape and size. They are available in various diameters, lengths, and shapes, including round, square, and deformed. This variety allows engineers to select the most suitable rebar type based on the specific requirements of the construction project. Moreover, steel rebars exhibit high resistance to corrosion, particularly when properly coated or protected. This corrosion resistance ensures the longevity and durability of the reinforced concrete structure, even in harsh environments or exposure to moisture. In conclusion, steel rebars stand out from other reinforcement types due to their exceptional strength, ability to withstand high tensile forces, excellent bond with concrete, versatility in shape and size, and resistance to corrosion. These qualities make steel rebars the most commonly used and preferred choice for reinforcing concrete structures in the construction industry.

Q:What is the effect of steel rebars on the formwork design?: The formwork design in construction projects is significantly impacted by steel rebars. These reinforcement bars, also known as rebars, play a crucial role in providing strength and stability to concrete structures. One important aspect influenced by steel rebars in formwork design is the proper positioning and spacing of the rebars within the formwork. To ensure the structural integrity of the concrete element, the formwork must be designed to accommodate the rebars and allow for their correct placement. This may involve creating openings or recesses in the formwork to facilitate the passage of the rebars. The presence of steel rebars also affects the size and dimensions of the formwork. As the rebars occupy space within the concrete element, the formwork needs to be adjusted accordingly to accommodate these additional materials. This may require increasing the size or thickness of the formwork to provide the desired concrete cover over the rebars. Another factor influenced by steel rebars in formwork design is the consideration of the weight and load-bearing capacity of the formwork system. The addition of steel rebars significantly increases the weight of the concrete structure, necessitating the design of formwork that can withstand this additional load. This may involve using stronger and more durable materials for the formwork and ensuring proper bracing and support. Furthermore, the presence of steel rebars can impact the formwork construction process. The formwork design must carefully consider the installation and removal of the rebars without compromising the integrity of the formwork system. This may involve incorporating removable sections or panels in the formwork design to facilitate the placement and removal of the rebars. In conclusion, steel rebars have a profound impact on formwork design in construction projects. Proper consideration and planning are necessary to ensure the correct positioning, spacing, and support of rebars within the formwork. The presence of rebars also affects the size, dimensions, weight, and construction process of the formwork system. Overall, the successful construction of durable and structurally sound concrete elements relies on the proper integration of steel rebars within the formwork design.

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