Basalt fiber composite ribs are high-performance fiber reinforced composite ribs made of basalt fibers as reinforced material and resin as matrix, and are made through composite processes. It combines the high strength, corrosion resistance, high temperature resistance and other characteristics of basalt fibers, as well as the molding plasticity of resin matrix, and is widely used in engineering fields that need to replace traditional steel bars. The following are its main uses and advantages:
1. Concrete structure reinforcement
1. Replace steel bars for corrosion environments
Scene:
Marine engineering: such as port terminals, cross-sea bridges, and coastal buildings to avoid structural deterioration caused by seawater corrosion.
Chemical plant: Replace steel bars to extend the structural life in chemically corroded environments such as strong acids and strong alkalis (such as fertilizer plants and sewage treatment plants).
Projects in saline soil areas: prevent steel bars from rusting due to high salt content in soil, suitable for salt-alkali land buildings in the northwest region and coastal areas.
Advantages:
Corrosion resistance is better than steel bars (the resistance to chloride ion penetration is more than 10 times that of steel bars), greatly reducing maintenance costs.
Light weight (The density is about 1.9-2.1g/cm³, only 1/4 of steel bars), which is easy to transport and construction, and reduces the weight of concrete structures.
2. Refractory and high temperature resistant structure
Scene:
Industrial high-temperature workshops, boiler rooms, etc. that need to withstand high temperatures (such as beams and columns, floor slabs).
Tunnel engineering (especially extra-long tunnels or high-gas tunnels) to avoid structural collapse caused by softening of steel bars during fire.
Advantages:
The melting point of basalt fibers is as high as 1500℃, and the composite ribs can withstand temperatures of 300-400℃ in the short term (better than carbon fiber and glass fiber FRP ribs), and the structural stability is better in fires.
3. Special buildings and seismic structures
Scene:
Reinforce historical cultural relics buildings (such as restoration of ancient buildings) to avoid the damage to the body of cultural relics by corrosion of steel bars.
Concrete structures in high-intensity seismic areas (such as areas with seismic fortification intensity ≥7 degrees) use the high ductility of composite ribs to improve the seismic performance of the structure.
Advantages:
The elastic modulus has a high degree of matching with concrete (approximately 40-60GPa), which can reduce interfacial stress concentration and reduce crack risk.
2. Geotechnical engineering and foundation pit support
1. Reinforcement of anchor rods and cables
Scene:
Slope support and deep foundation pit enclosure (such as urban subway foundation pits and high-rise buildings deep foundation pits) replace traditional steel anchors.
Reinforcement of tunnel surrounding rock (such as initial support or advance support of railway tunnels and highway tunnels).
Advantages:
Corrosion resistance significantly extends the service life of the anchor, especially suitable for groundwater-rich or corrosive formations.
Non-magnetic (non-conductive), suitable for projects that are sensitive to electromagnetic environments (such as subway adjacent to communication pipeline areas).
2. Soil nail wall and composite foundation
Function: Insert into the soil as a soil nail, and work with the soil to form a composite structure to improve slope stability.
Application: Ecological support projects for road slopes and mine slopes, which can achieve green protection in combination with vegetation planting.
3. Municipal and transportation engineering
1. Bridge Engineering
Scene:
The bridge deck paving, piers or abutment concrete structure (replace ordinary steel bars) of newly built bridges.
Old bridge reinforcement modification (such as pasting FRP ribs or embedded reinforcement) improves load-bearing and durability.
Case: The approach bridge of a cross-sea bridge uses BFRP ribs, and its estimated service life will be extended from 50 years of reinforced concrete structure to more than 100 years.
2. Tunnels and culverts
Function: used in tunnel secondary lining, culvert roof panel and other parts to reduce water leakage caused by steel bar corrosion.
Advantages: Stable performance in humid environments and reduce tunnel maintenance frequency (such as long-term corrosion resistance requirements of subway tunnels).
4. Water Conservancy and Environmental Engineering
1. Hydraulic structure
Scene:
The concrete structure of reservoir dams, spillways, and irrigation channels prevents corrosion of steel bars caused by long-term blisters.
Retaining walls, slope protection piles, etc. in river channel improvement projects.
Advantages: Excellent water resistance and avoid structural safety hazards caused by water penetration and rust in traditional steel bars.
2. Sewage treatment facilities
Application: Reinforcement of concrete structures such as sewage treatment tanks and aeration tanks to resist the corrosion of acid and alkaline substances in sewage.