Global supplier of
High-Performance Materials

Basalt Fiber

Basalt Fiber is a high-performance natural inorganic fiber derived from basalt—an igneous volcanic rock. Its production involves melting basalt at ultra-high temperatures (1450–1500℃) and drawing the molten magma into continuous fine filaments. Renowned for exceptional strength and durability, basalt fiber has emerged as a premium reinforcement material in construction, effectively enhancing the mechanical properties and service life of concrete and asphalt composites.

Boasting superior chemical and alkali resistance, Basalt Fiber serves as an excellent alternative to Polypropylene (PP), Polyacrylonitrile (PAN), Polyester (PET), and Cellulose fibers. In cement concrete, basalt fiber delivers robust reinforcement; in asphalt concrete, basalt fiber significantly improves high-temperature stability, low-temperature crack resistance, and fatigue performance by addressing key pain points of traditional fiber materials.

What are the key features of basalt fiber?

-Derived from natural basalt rock (100% inorganic, non-organic components)

-Ultra-high tensile strength (3x that of steel) with excellent modulus

-Superior heat resistance (withstands up to 750℃) and non-combustibility

-Non-magnetic, non-conductive, and strong corrosion/alkali resistance

-Lightweight (lower density than steel) with good processability

-Eco-friendly, with no harmful emissions during production or use

Technical Data:

Is there any recommended dosage for basalt fiber?

Dosage varies by application and composite type, with the following guidelines:

-Cement concrete (load-bearing structures): 1.0–1.5 kg per cubic meter

-Asphalt concrete (highways/pavements): 0.8–1.2 kg per cubic meter

-Maintenance & reinforcement projects: 1.5–2.0 kg per cubic meter

-Consult our technical team for customization based on concrete grade and project design.

How to mix basalt fiber? 

1.Add coarse/fine aggregates and Basalt Fiber into the mixer first.

2.Dry mix for 1–2 minutes to ensure uniform dispersion (prevents agglomeration).

3.Add cement, water, and admixtures, then wet mix for 2–3 minutes until homogeneous.

4.For asphalt: Add fiber during aggregate heating (160–180℃), mix 30 seconds before adding asphalt.

What applications is basalt fiber used for? 

1. Transportation Infrastructure

-Roads, pavements, bridges, tunnels, highways, wharves, and water conservancy projects

-Airport aprons, parking lots, and heavy-duty pavement systems

2. Building Engineering

-High-rise building components: Basement floors, side walls, girders, and large concrete columns

-Waterproof structures: Concrete septic tanks, cisterns, and roof slabs

3. Special & Defense Projects

-Thin-wall structures, geotechnical engineering, and protection engineering

-Defense facilities and fire-resistant construction projects

4. Asphalt Concrete Pavements

-Dense-graded (AC), stone mastic (SMA), and open-graded (OGFC) asphalt mixtures

How to store and handle basalt fiber? 

Basalt Fiber should be kept in a proper way to remain its property and performance.

-Store in a dry, cool warehouse with temperature 15–25℃ and relative humidity ≤60%.

-Avoid direct sunlight, high temperatures (＞60℃), and moisture to prevent fiber degradation.

-Keep away from strong acids/alkalis and sharp objects (to protect packaging).

-Seal packaging tightly after partial use. Shelf life is 36 months under proper storage.

-Stack no more than 8 layers to prevent packaging deformation and fiber clumping.

FAQ

Question 1: Is Basalt Fiber expensive compared to other materials?

A1: It’s cheaper than carbon fiber and aramid fiber but pricier than PP/steel fibers. Its long service life offsets the initial cost.

Question 2: Is basalt fiber easy to work with?

A2: Yes. It fits standard processes like molding, weaving, and pultrusion—no special equipment needed.

Question 3: Is basalt fiber eco-friendly?

A3: Absolutely. Made from natural basalt, it emits no harmful by-products during production or use.

Question 4: How to choose the right fiber length of basalt fiber?

A4: 3–12 mm for thin concrete; 15–30 mm for asphalt; 30–60 mm for heavy-duty reinforcement.

Question 5: Can basalt fiber be mixed with other fibers?

A5: Yes. Mixing with PP fiber (1:1) enhances both crack control and durability.

Question 6: Does basalt resist alkali in concrete?

A6: Yes. It’s alkali-resistant, so it won’t degrade in cementitious environments (unlike some glass fibers).

Question 7: Is it suitable for high-temperature projects?

A7: Yes. It withstands up to 750℃, making it ideal for fire-resistant walls and industrial