ReinBasalt Chopped Basalt Fiber for Concrete & Floors

What is ReinBasalt

ReinBasalt is a chopped fiber with a diameter of 13 µm, made from molten natural basalt at about 1450 °C. It combines a tensile strength of 1200 MPa and a modulus of elasticity close to that of glass with complete non-combustibility.

Basalt fiber has almost the same density as concrete. So, unlike polypropylene, it doesn’t float, and unlike steel, it doesn’t sink to the bottom. The fiber is distributed evenly through the entire thickness of the slab. The fibers are coated with an alkali-resistant sizing, which ensures bonding with the cement and protects them in the alkaline environment.

Specifications

Material	basalt
Filament diameter	13 µm
Length	6 / 12 / 24 mm
Tensile strength	1200 MPa
Modulus of elasticity	83 GPa
Density	2.7 g/cm³
Service temperature	up to 600 °C
Melting point	~1450 °C
Sizing	alkali-resistant

Technical data sheet (TDS) and quality certificate available on request.

Benefits

Even through the thickness

Basalt fiber's density is close to that of concrete, so it doesn't float like polypropylene or sink like steel.

High strength and modulus

Concrete better resists cracking caused by shrinkage, temperature changes and loads.

Non-combustible

Withstands over 600 °C and does not melt in a fire.

Ready for grinding

The fibers don't pull out or make the surface fuzzy when the floor is ground and polished.

Freeze-thaw resistance

Surfaces hold up better against frost and abrasion.

Natural material

Rust-free, chemically inert, environmentally friendly.

How and where to use ReinBasalt

Where to use it

Industrial and polished (decorative) floors, floor toppings
Screeds, underfloor heating
Roads, outdoor paved areas, bridge and airfield pavements
Hydraulic and coastal structures
Heat-resistant concrete, furnaces, fireplaces and fire-protective structures
Cellular concrete, dry mixes, paving stones

Workers finishing a freshly poured curved concrete road pavement

Recommended dosage

Application	Dosage
Screeds, paving slabs	0.6–1.5 kg/m³
Industrial floors	1.5–2.5 kg/m³
Roads, bridges, outdoor paved areas	1.8–3 kg/m³
Dry mixes	~1 kg per 100 kg of cement

The exact dosage depends on loads, thickness, concrete grade and subbase. We will match it to your project.

How to add it to concrete

Add to dry components only. Never pour the fiber into water or into wet ready-mixed concrete, because it will clump.
In a concrete mixer: add the sand and fiber first and mix, then the cement and crushed stone, and only at the very end the water.
At the batching plant: feed the fiber onto the conveyor belt together with the aggregates and extend the mixing cycle by 45–90 s.
There is no need to change the concrete mix design.
Safety: wear gloves and safety glasses.

ReinBasalt FAQ

Basalt fiber or glass fiber?

ReinBasalt is designed for concrete and floors where the fiber has to perform for years and where temperature matters. ReinGlass is suited to early-age crack resistance in plasters, screeds and gypsum mixes.

Basalt fiber or polypropylene fiber?

ReinBasalt has a modulus of elasticity about 10 times higher and does not burn. Polypropylene ReinLite costs less and gives better protection against explosive spalling of concrete in a fire. The two are often combined.

Why shouldn't basalt fiber be added to water?

In water, the fine mineral fibers stick together in clumps and no longer disperse through the mix. That's why they are mixed with dry sand and crushed stone, and the water is added last.

Become a ReinBasalt distributor

We are looking for distributor partners in new markets and look forward to your request. Tell us about your company and market, and we will be glad to help with your order, the right fiber range and delivery to your country.