Deformed steel bar HPB400;HPB500 System 1

Deformed steel bar HPB400;HPB500

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1000 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

Specifications of Deformed Steel Bar:

Standard	GB	HRB335, HRB400, HRB500
	UK	G460B, B500A, B500B,B500C
	USA	GR40, GR60
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm
Diameter
Length	6M, 9M,12M or as required
Place of origin	Hebei, China mainland
Application	building,construction,road,bridge etc
Brand name	DRAGON

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

Diameter(mm)	Section area (mm²)	Mass(kg/m)
6	28.27	0.222
8	50.27	0.395
10	78.54	0.617
12	113.1	0.888
14	153.9	1.21
16	201.1	1.58
18	254.5	2.00
20	314.2	2.47
22	380.1	2.98
25	490.9	3.85
28	615.8	4.83
32	804.2	6.31
36	1018	7.99
40	1257	9.87
50	1964	15.42

Usage and Applications of 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 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:Can steel rebars be used in pedestrian bridge construction?: Yes, steel rebars can be used in pedestrian bridge construction. Steel rebars are commonly used as reinforcement in concrete structures, including bridges. They enhance the structural integrity and strength of the bridge, ensuring its ability to withstand various loads and forces. Steel rebars provide the necessary reinforcement to resist tension, bending, and shear forces, making them an ideal choice for pedestrian bridge construction. Additionally, steel rebars have excellent durability, corrosion resistance, and are readily available, making them a cost-effective and reliable option for bridge construction.

Q:How do steel rebars affect the durability of a structure?: Steel rebars have a significant impact on the durability of a structure. These reinforcements, made of high-strength steel, are embedded within concrete to enhance its tensile strength and overall structural integrity. By providing resistance against cracking and flexural stresses, steel rebars help in preventing structural failures and ensuring the long-term durability of the construction. One of the main benefits of using steel rebars is their ability to withstand tension forces. Concrete, although strong in compression, is weak when it comes to tension. When a structure is subjected to loads that cause bending or stretching, the rebars distribute these forces throughout the concrete, preventing it from cracking or breaking apart. This reinforcement improves the overall load-bearing capacity of the structure, making it more resistant to external forces such as earthquakes or heavy winds. Moreover, steel rebars also play a crucial role in preventing corrosion within the structure. Concrete is porous, and over time, moisture can penetrate it, causing the embedded reinforcement to rust. Rusting rebars expand, leading to cracks and weakening the structure. However, using corrosion-resistant rebars, such as epoxy-coated or stainless steel rebars, significantly reduces the risk of corrosion, thus enhancing the durability of the structure. In addition to their mechanical properties, steel rebars also contribute to the durability of a structure in terms of construction speed and long-term maintenance. Compared to other traditional reinforcement materials, rebars are relatively easy to install, reducing construction time and costs. Furthermore, their long lifespan and low maintenance requirements ensure the longevity and durability of the structure over time. In conclusion, steel rebars are essential for ensuring the durability of a structure. Their ability to resist tension forces, prevent cracking, and mitigate the risk of corrosion significantly enhances the structural integrity and longevity of the construction. Incorporating steel rebars into the design and construction process is crucial to creating sturdy, safe, and long-lasting structures.

Q:What is the effect of aging on the properties of steel rebars?: The effect of aging on the properties of steel rebars is generally negative. Over time, steel rebars may experience gradual deterioration due to factors such as corrosion, fatigue, and stress. This can lead to a reduction in their structural integrity and load-bearing capacity. Aging can also cause an increase in brittleness, making rebars more prone to fractures and failures. Therefore, regular inspections, maintenance, and potentially replacement of aged rebars are crucial to ensure the safety and longevity of structures.

Q:What are the safety precautions to take when working with steel rebars?: When working with steel rebars, it is crucial to follow various safety precautions to ensure the well-being of yourself and those around you. Here are some safety measures to consider: 1. Personal Protective Equipment (PPE): Always wear appropriate PPE such as safety goggles, gloves, hard hats, and steel-toed boots to protect yourself from potential hazards like falling objects, cuts, and burns. 2. Training and Awareness: Obtain proper training and be aware of the potential risks associated with working with steel rebars. Educate yourself and your team about the correct procedures and safe handling techniques. 3. Secure Storage: Store steel rebars in a designated area to prevent them from falling or causing accidents. Stack them systematically, ensuring stability and avoiding areas with heavy foot traffic. 4. Lifting Techniques: When lifting steel rebars, use proper lifting techniques such as bending your knees and using your legs to lift rather than your back. Avoid overloading yourself and seek assistance when needed. 5. Handling Tools: Use suitable tools like wire mesh gloves or pliers to handle steel rebars. This prevents injuries caused by sharp edges or splinters. 6. Inspection: Regularly inspect steel rebars for any defects, such as rust or sharp edges, before using them. Damaged or defective rebars should be discarded and replaced. 7. Clear Work Area: Keep the work area organized and free from clutter, ensuring that there are no tripping hazards or obstacles that could cause accidents. 8. Communication: Maintain clear communication with your team members, signaling when moving or handling steel rebars. This helps prevent accidental collisions or injuries. 9. Fire Safety: Be mindful of fire hazards when working with steel rebars. Keep flammable materials away from the work area and have fire extinguishers readily accessible. 10. First Aid: Ensure that a first aid kit is available nearby, and be familiar with basic first aid procedures in case of any accidents or injuries. By following these safety precautions, you can significantly reduce the risk of accidents and injuries while working with steel rebars. Remember, safety should always be a top priority in any work environment.

Q:How do steel rebars affect the overall creep and shrinkage of concrete structures?: Steel rebars can have a significant impact on the overall creep and shrinkage of concrete structures. Creep refers to the long-term deformation of concrete under sustained load, while shrinkage is the reduction in volume that occurs as the concrete dries and hardens. Steel rebars play a crucial role in controlling and mitigating both creep and shrinkage. When embedded in concrete, rebars provide tensile strength and improve the overall load-carrying capacity of the structure. This reinforcement allows for the distribution of stress and helps limit the amount of deformation that occurs over time. In terms of creep, steel rebars help minimize its effects by reducing the amount of stress transferred to the concrete. By absorbing a significant portion of the applied load, rebars alleviate the strain on the concrete, thus reducing the creep deformation. Additionally, the presence of rebars helps control the cracking that may occur due to creep, further preserving the structural integrity of the concrete. Regarding shrinkage, steel rebars can also influence its magnitude. As concrete shrinks during the drying and hardening process, the rebars act as restraints, preventing excessive volume reduction. By resisting the contraction forces, rebars help minimize the potential for cracking and maintain the structural stability of the concrete. It is important to note that the choice of rebar type, size, and spacing can affect the overall impact on creep and shrinkage. Proper design and placement of rebars, including appropriate cover thickness, are necessary to ensure optimum performance and minimize the potential for long-term deformations. In summary, steel rebars play a vital role in controlling the overall creep and shrinkage of concrete structures. By providing reinforcement and distributing stress, rebars help limit deformation, prevent cracking, and maintain the structural integrity of the concrete over time.

Q:Can steel rebars be used in precast concrete elements?: Yes, steel rebars can be used in precast concrete elements. Rebars provide reinforcement to the concrete, increasing its strength and durability. They are commonly used in precast concrete elements to ensure structural integrity and enhance load-bearing capacity.

Q:Can steel rebars be used in architectural or decorative concrete applications?: Yes, steel rebars can be used in architectural or decorative concrete applications. They provide structural reinforcement and enhance the overall strength and durability of the concrete. Additionally, when properly designed and installed, steel rebars can be concealed or incorporated into the design, making them suitable for various aesthetic purposes in architectural or decorative concrete projects.

Q:How do steel rebars resist alkali-silica reaction in concrete?: The primary reason why steel rebars can withstand the alkali-silica reaction in concrete is because of the passive film that forms on their surface and the alkaline environment of the concrete. When steel rebars are embedded in concrete, they develop a passive film on their surface. This film serves as a protective layer that prevents direct contact between the steel and the aggressive alkali-silica reactive aggregates that are present in the concrete. The formation of this passive film is a result of the high pH of the alkaline environment created by the cement in the concrete, which usually has a pH level of 12-13. This high pH aids in the creation of an oxide layer on the surface of the steel rebar, effectively shielding it from the reactive elements in the aggregates. Moreover, the alkaline environment of the concrete plays a crucial role in maintaining the passivity of the steel rebars. The alkalinity of the concrete enables the passive film to remain stable and intact, providing a continuous barrier against the alkali-silica reaction. As long as the pH of the concrete remains high, the steel rebars will continue to resist the reaction. It is important to note that the thickness and quality of the passive film on the steel rebars are vital in guaranteeing their resistance to the alkali-silica reaction. Any factors that can compromise the integrity of this film, such as carbonation or chloride contamination, can increase the risk of the reaction occurring. In conclusion, the resistance of steel rebars to the alkali-silica reaction in concrete is primarily due to the presence of a passive film on their surface, which is formed by the alkaline environment of the concrete. This film functions as a protective barrier, preventing direct contact between the steel and the reactive aggregates and minimizing the likelihood of the reaction occurring.

Q:Can steel rebars be used in the construction of hospitals?: Yes, steel rebars can be used in the construction of hospitals. Steel rebars are commonly used in reinforced concrete structures to provide strength and stability. In hospital construction, where safety and durability are crucial, steel rebars are essential for reinforcing concrete foundations, columns, beams, and other structural elements. They help ensure the structural integrity of the hospital building, making it resilient and capable of withstanding various loads and potential hazards.

Q:How do steel rebars affect the fire resistance of concrete structures?: Steel rebars can significantly enhance the fire resistance of concrete structures. The presence of steel rebars within concrete provides reinforcement and prevents the structure from collapsing under high temperatures. The steel rebars act as a heat sink, absorbing and dissipating heat away from the concrete, thereby delaying the onset of structural failure. This improved fire resistance allows concrete structures with steel rebars to maintain their integrity for a longer duration during a fire event, providing valuable time for evacuation and firefighting efforts.

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