Grouted Fully Threaded Cable Bolts

Jiufu's cable bolts are designed for use as primary or secondary roof supports on damaged and unstable ground as well as high stress ground. Cable bolts are much stronger than traditional bolts and have unparalleled flexibility and elongation to accommodate the movement of the formation. Cable studs are suitable for situations where standard floor support is insufficient.

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Product Description

Steel strand is a steel product composed of multiple steel wires. The surface of the carbon steel can be added with galvanized layer, zinc-aluminum alloy layer, aluminum-clad layer, copper-plated layer, epoxy resin coating, etc. as needed.

Industrial steel strands are important hardware used in concrete structures for reinforcement and safety.

There are 7 types of industrial steel strand. Although almost all industrial stranded wire is made of steel, there are several different types of industrial stranded wire created for different applications. They include:

1. Unbonded steel strand:

Most uses for unbonded strand involve post-tensioning. The steel strands in use can be separated from the concrete through anti-corrosion grease and polyethylene plastic, allowing the steel strands to move freely within the layer, making construction more convenient. Unbonded PC strands have very little friction between them and can be easily bent into a variety of curved shapes.

2. Bonded steel strand:

High tensile strength, firm connection with concrete, stable construction, and good combination with reinforced concrete. It can also save materials, reduce deformation and structural weight, and improve stiffness, wear resistance, and waterproofness.

3. Spiral ribbed steel strand:

In terms of strength and durability, spiral ribbed strands are comparable to bonded strands and can be used in precast concrete elements. The surface of the steel wire adopts a spiral rib design, which is unique. This unique design provides better adhesion to concrete, making it an excellent choice for construction under pressure.

4. Zigzag steel strand:

The surface texture of zigzag strands is similar to that of spiral ribbed strands. Due to its high strength and long life, this type of steel strand is often used in the manufacture of precast concrete components such as beams and columns.

5. Stranded steel wire:

Compared to other strands, multi-strand strand bends fairly easily, making it an excellent choice for curved or odd-shaped buildings.

6. Coated Steel Strands:

In terms of elasticity, coated steel strands are comparable to unbonded steel strands, but they include a protective coating to fend off corrosion. This steel strand has better bonding qualities and weather resistance, making it perfect for post-tensioning applications.

7.Prestressed Steel Strands:

In terms of strength and durability, pre-stressed steel strands are comparable to bonded steel strands; however, they are pre-stressed to increase the strength and stability of the concrete construction. This kind of steel strand is well known for its capacity to withstand high-stress levels and is frequently used in the building of precast concrete parts, such as beams and columns.

Composition

1. Steel wire:

The steel wire of the steel strand is made of high-strength high-quality steel wire. It is usually surface treated with galvanizing, aluminum plating, tin plating and other processes to prevent the steel wire from rusting.

2. Core wire:

The core wire is the internal support structure of the steel strand, usually using a steel core or fiber core to ensure the stability and bending resistance of the steel strand.

3. Coating:

The coating is a protective layer on the surface of the steel strand, and its function is to prevent the steel strand from corrosion, wear and oxidation.

In short, the components of steel strand include steel wire, core wire and coating. The quality and characteristics of these components will directly affect the performance and service life of steel strand. Therefore, when selecting steel strands, it is necessary to select the appropriate steel strand material and model according to the specific use needs and environment to ensure its safety and efficiency during use.

Installation

1. Material preparation:

First, materials and equipment such as steel strands and bolts need to be prepared.

2. Laying out and drawing bolts:

According to the design requirements, steel strands are laid on bridges, viaducts and other structures that require increased load-bearing and earthquake resistance. Then, insert the bolt into the end cover hole and tighten the bolt with a pneumatic wrench.

3. Stranding：

The prefabricated steel strands are laid side by side on temporary racks and then twisted.

4. Tension：

Pull the twisted steel strand to the predetermined position. This step requires the use of a tensioning machine to pull the strands to a predetermined length and tension.

5. Anchorage：

After completing the tensioning of the steel strand, the other end of the steel strand needs to be firmly fixed on the anchor for anchoring. When performing anchoring work, it is necessary to determine the type and quantity of anchors to be used based on the pulling force and the number of strands, and install all anchors evenly on each strand. After installation, the strands for tensioning and anchoring need to be placed for more than 24 hours to wait for the steel strands to solidify.

6. Spray anti-corrosion：

After the tensioning and anchoring are completed, the steel strands need to be spray-coated for anti-corrosion treatment.

7. Acceptance：

Finally, after complete curing, the strands are inspected and accepted. Inspection and acceptance need to include testing of the appearance, tensile strength and number of strands of the steel strands.

Advantages

1. Wear resistance: Because steel strands are made of multiple steel wires and have high surface hardness, their wear resistance is superior to other materials when the weight is the same.

2. High strength: Because the steel strand is twisted with multiple steel wires, it can withstand the lifting and transportation of a large number of heavy objects.

3. Corrosion resistance: The outside of steel strands is generally treated with galvanizing or other methods, which can effectively prevent the steel strands from being oxidized and corroded during use.

4. High temperature resistance: The hardness of the steel strand decreases after being heated, but its elasticity remains unchanged and can withstand heavy loads in high temperature environments.

5. Easy maintenance: Steel strands need to be cleaned and lubricated regularly to maintain their good condition.

Grouted fully threaded cable bolts