Basalt fiber-reinforced composite material BFRP profile

(1) Basalt Fiber Reinforced Plastic (BFRP) is a high-performance fiber composite material mainly composed of basalt fibers, resin, and additives. Through the extrusion molding process, basalt continuous untwisted roving, felt, tape or cloth reinforced materials soaked in adhesive solution are heated and extruded through a mold under the action of traction force, and solidified to continuously produce glass fiber reinforced plastic profiles of unlimited length.

Basalt fibers mainly play a reinforcing role and serve as the main load-bearing body, while resins mainly serve the functions of bonding, transmitting shear forces, protecting fibers, and providing lateral support to fibers. Additives mainly improve the physical and chemical properties of resins. According to the structure, it can be divided into BFRP profiles, BFRP reinforcement materials, and BFRP pipes.(2) Advantages of BFRP materials

1. Low density

The density of BFRP is only 1800-2100kg/m3, which is 23% -27% of that of steel (7850kg/m3 for steel). This feature makes support transportation and construction convenient, and does not require lifting equipment during installation, which can significantly reduce transportation and construction installation costs. And this project is installed and constructed on barren hills and slopes, saving transportation and construction installation costs more significantly.

2. High intensity

The ultimate tensile strength of BFRP material is 722MMpa, which is 2.15-3.07 times that of steel (235Mpa for Grade I steel and 335Mpa for Grade II steel). If an equal strength cross-sectional design is adopted, the cross-sectional area of the profile can be reduced, thereby reducing the weight of the support and further lowering the cost of the support.

3. Good corrosion resistance

After soaking in sulfuric acid (H2SO4) solution with pH=3 for 60 days (simulating acid aging under natural conditions for 30 years), the strength decreased by about 7.2%; After soaking in NaOH solution with pH=12 for 60 days (simulating acid aging under natural conditions for 30 years), the strength decreased by about 6.7%; After soaking in water at 25 ℃ for half a year (simulating 50 years of moisture aging under natural conditions), the strength decreased by 4.34%. Replacing spiral steel pipe piles with BFRP columns directly connected to groundwater has strong corrosiveness. Using BFRP columns can greatly reduce the corrosive effect of groundwater on the foundation, thereby greatly improving the service life of the foundation and even the entire structure; Replacing traditional steel structures with BFRP structures and exposing them directly to the atmosphere can greatly reduce the corrosive effect of the atmosphere on the structure, thereby improving its service life.

4. Strong UV resistance

After being irradiated for 5 weeks at a UV intensity of 0.2MJ/(m2 · h) at 26 ℃ (simulating natural UV aging for 30 years), the intensity decreased by about 8%. If a UV resistant protective layer is added to the surface of GFRP, the UV blocking rate can reach 99.9%. And the structure is directly exposed to sunlight, and the strong UV resistance of BFRP material also greatly extends the service life of the structure.

5. Strong designability

The BFRP structure can select matrix and fiber materials, as well as their formulations and production processes, according to different structural performance requirements, to meet various requirements such as strength, stiffness, corrosion resistance, UV resistance, product color, etc., in order to fully utilize the advantages of BFRP's high specific strength and economically use materials.

6. Easy to shape

Produce FRP profiles of different shapes and specifications according to actual needs.

7. Good maintainability

Due to its good durability, it is basically a maintenance free structure within the design life. This is very meaningful for ensuring the safety of photovoltaic power plants and reducing maintenance costs.