deformed steelbar

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Deformed Steel Rebars for Construction Concrete

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

Q:How are steel rebars connected to each other in construction?: Steel rebars are connected to each other in construction through a process called rebar splicing, which involves overlapping the rebars and then connecting them using mechanical splices or by welding them together. This ensures a strong and secure connection that enhances the structural integrity of the construction project.

Q:Can steel rebars be used in underground construction or tunnels?: Yes, steel rebars can be used in underground construction or tunnels. Steel rebars provide crucial reinforcement to concrete structures, enhancing their strength and durability. In underground construction or tunnel projects, where structural integrity is of utmost importance due to the surrounding soil and potential pressure, steel rebars are commonly used to reinforce concrete walls, floors, and ceilings, ensuring the safety and stability of the underground structures.

Q:How do steel rebars affect the fire resistance of concrete structures?: Concrete structures can greatly increase their ability to withstand fire by incorporating steel rebars. These rebars serve as reinforcement, providing extra strength and stability to the structure and enabling the concrete to endure the intense heat of a fire. The fire resistance of concrete structures primarily relies on the fact that concrete has low thermal conductivity. When exposed to high temperatures, concrete undergoes spalling, where the outer layer breaks off due to the rapid expansion of trapped water. However, the presence of steel rebars helps prevent spalling by holding the concrete together and preventing it from disintegrating. Moreover, steel rebars have a higher melting point than concrete. This means that even when exposed to extreme heat, the rebars maintain their strength and integrity. Consequently, the overall structural stability of the concrete structure remains intact, even in the presence of fire. Steel rebars also act as a heat sink, absorbing and dissipating heat away from the surrounding concrete. This dissipation of heat prevents the formation and spread of localized hotspots throughout the structure, thereby reducing the risk of structural failure. To further enhance the fire resistance of concrete structures, specialized types of steel rebars, known as fire-resistant or fire-rated rebars, can be utilized. These rebars are specifically designed to withstand high temperatures for extended periods without losing their strength. They are often coated with materials such as epoxy or intumescent coatings, which offer additional protection against fire. In conclusion, steel rebars play a vital role in improving the fire resistance of concrete structures. Their presence enhances the overall structural stability, minimizes spalling, dissipates heat, and provides additional strength to withstand the intense heat generated during a fire.

Q:How are steel rebars tested for quality assurance?: Steel rebars are tested for quality assurance through a series of rigorous procedures. These include visual inspection, dimensional checks, and mechanical testing. Visual inspection ensures that the rebars are free from any visual defects or surface irregularities. Dimensional checks are performed to verify the rebars' weight, diameter, and length, ensuring they meet the required specifications. Mechanical testing involves conducting tensile and bend tests to assess the rebars' strength, ductility, and flexibility. These quality assurance tests ensure that steel rebars meet the necessary standards and are fit for use in construction projects.

Q:Can steel rebars be prefabricated off-site?: Yes, steel rebars can be prefabricated off-site. Prefabrication involves the manufacturing of construction components in a controlled environment away from the construction site. Steel rebars, which are commonly used to reinforce concrete structures, can be fabricated off-site in a specialized facility. Prefabricating steel rebars off-site offers several advantages. Firstly, it allows for a more efficient and streamlined manufacturing process. In a controlled environment, the rebars can be produced with precision and accuracy, ensuring consistent quality. This can reduce the risk of errors and minimize wastage. Additionally, prefabricating steel rebars off-site can help save time on the construction site. Since the rebars are manufactured in advance, they can be delivered to the site ready for installation without the need for on-site fabrication. This can significantly speed up the construction process and improve overall project timelines. Moreover, prefabrication offers better safety conditions. By manufacturing the rebars off-site, workers are exposed to fewer on-site hazards, such as working at heights or in confined spaces. The controlled environment of a fabrication facility also allows for better quality control and compliance with safety regulations. Lastly, prefabrication can contribute to cost savings. The efficient production process, reduced on-site labor, and improved construction timelines can help lower overall project costs. Additionally, the controlled environment of a fabrication facility can result in better utilization of materials and decreased wastage. In summary, steel rebars can indeed be prefabricated off-site, offering numerous benefits such as improved quality, time savings, enhanced safety, and cost-effectiveness. This practice is commonly employed in construction projects to optimize efficiency and ensure the highest standards of construction.

Q:Are there any alternatives to steel rebars in construction?: Yes, there are alternatives to steel rebars in construction. Some common alternatives include fiberglass rebars, carbon fiber rebars, and basalt rebars. These alternatives offer advantages such as being lightweight, corrosion-resistant, and having high tensile strength. Additionally, materials like bamboo, timber, and certain polymers can also be used as alternatives to steel rebars in specific construction applications.

Q:What are the different types of steel rebars used in marine constructions?: Marine construction commonly utilizes various steel rebars due to their specific properties and resistance to corrosion in saltwater environments. The different types of steel rebars employed in marine constructions are as follows: 1. Stainless steel rebars prove highly resistant to corrosion, making them an ideal choice for marine applications. Their chromium content creates a protective oxide layer on the surface, preventing rust and corrosion. These rebars come in different grades, such as 304 and 316, with 316 being the most commonly used due to its superior corrosion resistance. 2. Galvanized steel rebars, which are carbon steel rebars coated with zinc, act as a barrier against saltwater corrosion. These rebars are cost-effective and widely utilized in marine constructions. 3. Epoxy-coated steel rebars consist of carbon steel rebars coated with epoxy. This coating acts as an effective barrier between the steel and the saltwater environment, providing excellent corrosion protection. Epoxy-coated rebars are commonly employed in marine structures exposed to seawater or other corrosive agents. 4. Fiberglass rebars, made of high-strength glass fibers embedded in a polymer matrix, offer lightweight, non-corrosive alternatives to traditional steel rebars in marine constructions. Additionally, they possess high tensile strength and do not corrode in saltwater environments. 5. Titanium rebars, although more expensive than other steel rebars, are extremely corrosion-resistant and lightweight, making them suitable for marine applications. They are typically used in high-performance marine structures or specific applications where corrosion resistance is crucial. Each type of steel rebar mentioned above possesses unique advantages and limitations. The selection of the appropriate type depends on factors such as project requirements, budget, and environmental conditions. Engineers and designers must consider these factors to ensure the durability and longevity of marine construction structures.

Q:Are steel rebars eco-friendly?: Steel rebars are not inherently eco-friendly due to how they are produced and the extraction of necessary raw materials. The production of steel involves extracting iron ore, which consumes a significant amount of energy and resources. Additionally, this process releases large amounts of carbon dioxide, contributing to greenhouse gas emissions and climate change. However, it is important to note that steel rebars have a long lifespan and can be recycled, which helps minimize their environmental impact. Recycling steel requires far less energy and resources compared to manufacturing it from scratch, and it aids in conserving natural resources and reducing waste. Furthermore, steel rebars are commonly utilized in construction projects because of their strength and durability. Utilizing them can result in the construction of long-lasting structures that require fewer repairs and replacements over time. This aspect of durability can contribute to an overall decrease in environmental impact. In summary, although steel rebars are not environmentally friendly during the production process, their longevity and recyclability can significantly reduce their environmental impact when compared to alternative construction materials.

Q:What are the different methods for cutting steel rebars on-site?: There are several methods for cutting steel rebars on-site, including the use of a manual rebar cutter, a portable electric rebar cutter, a hydraulic rebar cutter, or a gas-powered rebar cutter. Each method has its advantages and limitations, depending on the specific requirements of the project.

Q:Are steel rebars susceptible to creep deformation?: Yes, steel rebars are susceptible to creep deformation. Creep is a time-dependent deformation that occurs under sustained load, and steel rebars can experience this phenomenon over time. It is essential to consider the potential creep deformation when designing structures that incorporate steel rebars to ensure their long-term stability and performance.

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