BST500S deformed steel bar for construction

BST500S deformed steel bar for construction System 1

BST500S deformed steel bar for construction

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 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

BST500S deformed steel bar for construction

Q: What is the average tensile strength of steel rebars?: The average tensile strength of steel rebars typically ranges from 400 to 600 megapascals (MPa).

Q: Are steel rebars resistant to corrosion?: Yes, steel rebars are generally resistant to corrosion due to the protective layer of oxide that forms on their surface. However, in certain environments or exposure to aggressive elements, corrosion can occur, leading to potential deterioration over time. To enhance their corrosion resistance, rebars can be coated or galvanized.

Q: What are the potential drawbacks of using steel rebars?: One potential drawback of using steel rebars is their susceptibility to corrosion. When exposed to moisture and certain environmental conditions, steel rebars can rust over time, leading to structural damage and reduced strength. Additionally, steel rebars are prone to thermal expansion and contraction, which can cause cracking or displacement in concrete structures. Lastly, the high cost of steel rebars compared to alternative materials might pose a financial drawback for construction projects on a tight budget.

Q: What are the different methods of protecting steel rebars from fire?: There are several methods for protecting steel rebars from fire. One common approach is to apply a fireproof coating or intumescent paint to the surface of the rebars. This coating expands when exposed to high temperatures, forming an insulating layer that helps protect the steel from the fire. Another method involves encasing the rebars in fire-resistant materials, such as concrete, which provides a barrier against the heat and flames. Additionally, using fireproof sleeves or wraps around the rebars can provide thermal insulation and prevent direct contact with the fire. Lastly, utilizing fireproofing sprays or fire-resistant boards can help protect steel rebars from fire by reducing the transfer of heat.

Q: Are steel rebars suitable for use in historical restoration projects?: Yes, steel rebars can be suitable for use in historical restoration projects. They provide structural reinforcement and can help strengthen deteriorated or weakened elements of historical buildings. However, careful consideration should be given to ensure that the use of steel rebars aligns with the original materials and techniques used in the construction of the historical structure. Additionally, the visual impact and authenticity of the restored elements should be taken into account, as steel rebars may not always be ideal for maintaining the historical integrity of the building.

Q: What is the effect of moisture on steel rebars?: The effect of moisture on steel rebars can lead to corrosion, which weakens the rebars and reduces their structural integrity over time. Moisture can initiate the oxidation process, causing the rebars to rust and potentially compromise the stability of reinforced concrete structures. Regular inspection and maintenance are crucial to prevent and address any moisture-related damage to steel rebars.

Q: Can steel rebars be used in structures with high resistance to earthquakes?: Yes, steel rebars can be used in structures with high resistance to earthquakes. Steel rebars are commonly used in reinforced concrete structures to enhance their strength and durability. In earthquake-prone areas, it is crucial to design and construct buildings that can withstand seismic forces. Steel rebars, when properly incorporated into the structural design, can help enhance the overall seismic performance of a building. Steel rebars provide several advantages in earthquake-resistant structures. Firstly, they increase the tensile strength of concrete, which is otherwise weak in tension. This reinforcement helps to prevent cracking and failure of the concrete during seismic events. Additionally, steel rebars can improve the ductility of the structure, allowing it to absorb and dissipate energy during an earthquake. This ductile behavior helps to minimize structural damage and ensures that the building remains stable and safe. Furthermore, steel rebars can be used in conjunction with other seismic design techniques to enhance the overall performance of the structure. For example, they can be combined with special concrete mixes, such as high-strength or fiber-reinforced concrete, to further improve the seismic resistance. Additionally, advanced structural systems like moment frames or shear walls can be integrated with steel rebars to provide even greater earthquake resistance. However, it is important to note that the earthquake resistance of a structure does not solely rely on the use of steel rebars. Proper design, construction techniques, and adherence to seismic building codes are also crucial factors. Engineers must consider various aspects such as the building's location, soil conditions, and expected seismic loads to ensure the structural integrity and safety of the building. In conclusion, steel rebars can be effectively used in structures with high resistance to earthquakes. Their inclusion in reinforced concrete structures enhances the tensile strength and ductility, enabling the building to withstand seismic forces. However, it is essential to implement comprehensive seismic design strategies and adhere to building codes to ensure the overall safety and performance of the structure.

Q: What are the factors to consider while choosing the right type of steel rebar for a project?: There are several factors to consider while choosing the right type of steel rebar for a project. The key factors include the specific application and load requirements of the project, the level of corrosion resistance needed, the desired strength and ductility of the rebar, as well as the project's budget and timeline. Additionally, it is important to consider the availability and sourcing of the desired type of steel rebar to ensure timely delivery and construction progress.

Q: What are the guidelines for the proper anchoring of steel rebars in slabs?: To ensure the structural integrity and strength of a concrete slab, it is crucial to properly anchor steel rebars. Here are some guidelines to consider: 1. Embedment depth: The concrete slab should have a specific depth of embedding for the rebars. This depth is determined based on factors like rebar size, strength, and load requirements. It is essential to adhere to the recommended embedment depth to ensure effective force transfer between the rebar and concrete. 2. Spacing: Within the slab, rebars should be evenly spaced at regular intervals to provide uniform reinforcement. The spacing is determined by design requirements and expected load. Following the suggested spacing guidelines will distribute the load evenly, preventing slab cracking or failure. 3. Lap length: When joining multiple rebars together, a lap splice is employed. The lap length refers to the minimum overlap required for proper force transfer between rebars. It is crucial to adhere to the specified lap length to maintain reinforcement integrity. 4. Edge distance: To prevent edge failure, rebars should be placed at a specific distance from the slab's edges. Edge distance is determined by factors such as bar size, concrete cover, and design requirements. Adhering to the recommended edge distance ensures proper anchoring, preventing concrete spalling or cracking near the edges. 5. Concrete cover: Rebars require a minimum concrete cover for corrosion protection and fire resistance. The concrete cover is the distance between the rebar's outer surface and the nearest concrete surface. Following the suggested concrete cover guidelines maintains the durability and longevity of steel rebars. 6. Accurate placement and alignment: Proper reinforcement is achieved by accurately placing and aligning rebars within the slab. They should be positioned at the correct depth, spacing, and alignment as per design specifications. This ensures secure anchoring and contributes to the overall strength of the slab. It is important to note that these guidelines may vary based on project requirements, local building codes, and design standards. Therefore, it is recommended to consult a qualified structural engineer or follow guidelines provided by relevant authorities to ensure proper anchoring of steel rebars in slabs.

Q: What is the role of steel rebars in preventing concrete segregation?: The prevention of concrete segregation heavily relies on steel rebars, as they offer structural support and reinforcement to the concrete. When concrete is poured, it assumes a liquid state and has a tendency to separate or segregate. This separation results in heavier aggregates settling at the bottom while lighter materials rise to the top. Consequently, an inconsistent and feeble concrete structure can emerge. By incorporating steel rebars into the concrete, they act as a framework or skeleton that holds the concrete intact, preventing segregation. The rebars effectively distribute weight and forces evenly, thereby maintaining a well-mixed and homogeneous concrete mixture. Moreover, steel rebars significantly enhance the tensile strength of the concrete. Although concrete boasts impressive compression strength, its tensile strength is relatively weak. The rebars effectively absorb tensile forces, preventing the formation of cracks and fractures in the concrete. This reinforcement allows the concrete structure to withstand external loads, such as the weight of a building or the force of an earthquake, without succumbing to breakage. In conclusion, steel rebars serve a dual purpose in the prevention of concrete segregation. They provide essential structural support and reinforcement, guaranteeing a homogeneous mixture and augmenting the overall strength and durability of the concrete structure.

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