ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR System 1

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 100000 m.t./month

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Product Description:

Appearance: Black

Technique: Slitting hot rolled steel coil

Grade: Q235, Q195,A36 SS400 S235jr.St37-2

Standard: AISI,GB,DIN,ASTM,EN,JIS

Length: 6m, 9m, 12m or as your requirement.

Width: 10mm-1010mm

Thickness: 1.5mm-20mm

Business type: big manufacture

Place of origin: Tianjin China (Mainland)

Packaging Details: In bundles for exporting and sea worthy

Delivery Detail: Within 15-35 days after receiving L/C or deposite T/T

ASTM STANDARD HIGH QUALITY HOT ROLLED REBAR

General specification as below:

Flat Bar Specification
Width (mm)	Thickness (mm)	Length (m)	Theoretical Weight (kg/m)
20	2.0	6/9/12	0.31
20	2.5	6/9/12	0.39
20	2.75	6/9/12	0.43
25	2.5	6/9/12	0.49
25	3.75	6/9/12	0.74
30	2.5	6/9/12	0.59
30	3.5	6/9/12	0.82
30	9.75	6/9/12	2.30
40	3.5	6/9/12	1.10
40	4.75	6/9/12	1.50
40	11.75	6/9/12	3.69
50	2.75	6/9/12	1.08
50	4.5	6/9/12	1.77
50	9.75	6/9/12	3.83
60	5.5	6/9/12	2.60
60	7.5	6/9/12	3.53
60	11.5	6/9/12	5.42
80	5.5	6/9/12	3.45
80	7.5	6/9/12	4.71
80	11.75	6/9/12	7.38
100	3.25	6/9/12	2.55
100	4.75	6/9/12	3.73
100	7.5	6/9/12	5.89
120	9.75	6/9/12	9.18
120	11.75	6/9/12	11.07
150	9.75	6/9/12	11.48
150	11.5	6/9/12	13.54
150	13.5	6/9/12	15.90
160	11.75	6/9/12	14.76
200	9.5	6/9/12	14.92
250	5.75	6/9/12	11.28
340	7.75	6/9/12	20.68

Products Advantages

1. high quality competitive price and Accurate in size

2. high dimensional accuracy

3. Guaranteed raw material

4.high utilization rate of material

5.convenient in construction, saving much time and labor

6. high mechanical strength

Application: Widely used for construction, Ship building, Machinery manufacturing ,steel structure,agriculture and steel grating.

Q: What are steel rebars?: Steel rebars are reinforced steel bars that are commonly used in construction projects to provide strength and stability to concrete structures. They are typically placed within the concrete to enhance its load-bearing capacity and help prevent cracks or failures. Rebars are made from high-strength steel and are available in various sizes and shapes to cater to different construction needs.

Q: How do steel rebars affect the overall fire resistance of concrete structures?: The overall fire resistance of concrete structures is greatly affected by steel rebars. These reinforcement bars, also known as steel rebars, are utilized in concrete structures to provide strength and stability. Their behavior when exposed to fire can either improve or weaken the fire resistance of the concrete structure. The fire resistance of the structure benefits from the inclusion of steel rebars. Steel's high thermal conductivity aids in dissipating the heat produced during a fire, preventing localized overheating and reducing the risk of structural failure. This dispersal of heat through the steel rebars slows down the rate at which the concrete's temperature rises, allowing for more time to evacuate and fight the fire. Furthermore, the presence of steel rebars also helps maintain the structural integrity of the concrete during a fire. Concrete has low tensile strength, and when subjected to high temperatures, it tends to crack and spall. However, the presence of steel rebars mitigates this issue by acting as reinforcement, holding the concrete together and preventing it from disintegrating due to heat. However, it is important to note that steel rebars can have a negative impact on fire resistance if not designed or protected properly. Insufficient size and spacing of the rebars can lead to a rapid transfer of heat through the concrete, resulting in premature failure. Additionally, if the rebars are not adequately protected with fire-resistant materials, they can lose their strength and integrity, further compromising the overall fire resistance of the structure. To ensure optimal fire resistance, designers and engineers consider various factors such as the size, spacing, and coating of the steel rebars, as well as the thickness of the concrete cover. Additionally, fireproofing measures such as using intumescent coatings, fire-resistant insulation, and fireproof claddings can be implemented to enhance the fire resistance of steel rebars and the overall concrete structure. In conclusion, steel rebars play a vital role in the fire resistance of concrete structures. When appropriately designed and protected, they enhance fire resistance by dissipating heat and maintaining structural integrity. However, inadequate design or lack of protection can compromise fire resistance. Therefore, it is crucial to adhere to proper design guidelines and implement appropriate fireproofing measures to ensure the overall fire safety of concrete structures.

Q: Can steel rebars be used in the construction of underground parking facilities?: Yes, steel rebars can be used in the construction of underground parking facilities. Steel rebars are commonly used in reinforced concrete structures to provide strength and durability, making them suitable for underground parking facilities where structural integrity is crucial. The rebars help to reinforce the concrete and increase its load-bearing capacity, ensuring the safety and stability of the parking facility.

Q: Can steel rebars be used in structures with high seismic activity?: Yes, steel rebars can be used in structures with high seismic activity. Steel is a resilient material that can withstand the forces generated during earthquakes. By reinforcing the concrete with steel rebars, the structure gains additional strength and enhances its ability to resist seismic forces. The use of steel rebars helps to improve the overall structural integrity and safety of the building in areas prone to earthquakes.

Q: What are the guidelines for proper curing of concrete structures with steel rebars?: The guidelines for proper curing of concrete structures with steel rebars include ensuring that the concrete is adequately hydrated through moist curing methods such as sprinkling water or covering with wet burlap. It is crucial to maintain a consistent and controlled temperature and humidity environment during the curing process to prevent cracking and enhance the strength development of the concrete. Additionally, it is essential to avoid rapid drying and exposure to extreme temperature variations to avoid any potential damage to the steel rebars.

Q: How are steel rebars used in the construction of dams?: Steel rebars are used in the construction of dams to reinforce the concrete structure and provide additional strength and durability. They are typically placed within the concrete to resist tensile forces and prevent cracking or collapsing under the immense pressure of water. The rebars help to distribute the load evenly across the dam, increasing its overall stability and ensuring its long-term structural integrity.

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: What is the typical weight per meter of a steel rebar?: The typical weight per meter of a steel rebar can vary depending on its size and grade. However, as a general guideline, a standard mild steel rebar with a diameter of 10 millimeters (mm) usually weighs around 0.616 kilograms per meter (kg/m). For larger sizes, such as a 20 mm rebar, the weight per meter can increase to approximately 2.47 kg/m. It is important to note that these values are approximate and may vary slightly depending on the specific manufacturing standards and regional regulations.

Q: Can steel rebars be used in bridge construction?: Yes, steel rebars are commonly used in bridge construction. They provide strength and reinforcement to the concrete used in bridge components such as beams, columns, and foundations. Steel rebars enhance the structural integrity and load-bearing capacity of the bridge, making it a durable and long-lasting infrastructure.

Q: How do steel rebars resist abrasion in concrete structures?: Steel rebars resist abrasion in concrete structures due to their high tensile strength and durability. When embedded within the concrete, the rebars act as reinforcement, providing additional strength to the structure. During the setting and hardening process of concrete, rebars are firmly embedded within the mixture, creating a strong bond. This bond ensures that the rebars remain securely in place, even when subjected to external forces such as abrasion. The surface of steel rebars is typically treated to enhance their resistance to abrasion. This can include processes such as hot-dip galvanizing or epoxy coating. These surface treatments create a protective layer that shields the rebars from the abrasive effects of the surrounding concrete and other external factors. Furthermore, steel rebars are designed with ridges or deformations along their surface. These ridges increase the surface area of the rebars, promoting a stronger bond with the concrete. This increased bond helps to distribute external forces, such as abrasion, more evenly throughout the structure, reducing the risk of localized damage. In summary, the high tensile strength, durability, and surface treatments of steel rebars, along with their ability to form a strong bond with concrete, enable them to resist abrasion in concrete structures.

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