Basalt Macrofibers

Basalt Macrofibers are a high-performance fiber-reinforced polymer (FRP) composite

Based on basalt fiber
Engineered to provide high post-cracking strength to concrete
Also increases toughness, impact-resistance, and fatigue-resistance
Basalt “minibar” macrofiber can be used as primary or secondary reinforcement
Shipped by container, in palletized 20lb boxes; certified and with EPD

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Applications Industry Advantages Specifications

Common Applications

Ideal to use when high-performance, corrosion-resistant reinforcement is desired

Designed to reduce or replace secondary and/or primary steel reinforcement

For structural applications requiring flexural tensile and post-crack performance

Utility infrastructure, such as pipes, water tanks, sewers, and tunnel segments

Bridge and marine structures, such as deck overlays, sea walls, piers, and pilings

Wall panels, raft slabs, foundations, footings, and underpinnings

Industry Challenges

Steel or other fibers have significant drawbacks in preparation, usage and longevity

Steel fibers corrode when exposed to moisture, chlorides, or de-icing salts
Concrete shrinks during curing, which causes plastic and drying shrinkage cracks
Steel is heavy and requires significant labor, lifting equipment, and logistics
Steel is electrically conductive and magnetic, which interferes with equipment
Some polymers or cellulose fibers may absorb water, impacting mix consistency

Material Advantages

Basalt Macrofibers overcome common issues, providing the perfect solution

Basalt is a natural material that’s inherently non-corrosive
Holds the matrix together post-crack, reducing crack width and propagation
Basalt macrofibers are lightweight, reducing the overall structural dead load
Non-conductive and non-magnetic, ideal for hospitals and power projects
Basalt does not absorb water, so the mix performance and curing remain stable

Business Benefits

Basalt can improve performance, project timelines, and costs

Fast and uniform dispersion during mixing, with no additional water demands
Does not affect concrete pumpability when following recommended practices
Allows for high dosages with minimal effect on processability
Lighter-weight material makes it easy to transport, handle, and mix
Volcanic rock is non-toxic, recyclable, with low environmental impact

Key Specifications

Technical characteristics of Basalt fibers + thermoset resin

Materials	Fiber Length	Fiber Diameter	Specific Gravity	Modulus of Elasticity	Tensile Strength
Basalt fiber + thermoset resin	43 +/- 2 mm* 1.7 +/- 0.08 in	0.70 mm 0.03 in	2.1 ± 0.1	42 GPa 6,091,585 psi	> 1400 MPa / 200,000 psi

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Trust the Testimonials

Stronger and Lighter, Naturally

"Composite materials like fiber-reinforced polymer (FRP) rebars offer higher tensile strength than Grade 60 steel at just a quarter of the weight—and unlike steel, they don’t corrode. This leads to longer service life for concrete structures. Among the various fibers used in FRP bars, basalt fiber stands out as a naturally sourced and sustainable alternative."

Alvaro Ruiz Emparanza

Ph.D., P.E.; Founder & CEO, Ecotori, LLC

Streamlined Our Process

"Using basalt rebar streamlined our tilt-up wall construction process, offering exceptional ease of use compared to steel rebar. Its lighter weight, easy handling, and resistance to corrosion have translated into substantial labor savings, allowing us to achieve efficiency without compromising on structural strength."

Brian Pratt

COO, McGarvey Development Company

Stronger And More Durable

"BFRP rebar is stronger and more durable than the minimum criteria set for GFRP bars and appears to be a viable alternative as a non-corrosive rebar option."

Steven Nolan

Office of Materials, Florida Department of Transportation

Faster, Stronger, and Longer Life

"The benefits of this bridge-building method are threefold. First, the arches are an instant framework. Second, you don’t need any steel reinforcing bars or rebar, because the arches are twice as strong as steel. And third, the tubes protect the concrete from water and elements, extending the life of the concrete."

Dr. Habib Dagher

Advanced Structures and Composites Center, U. of Maine

Same Building Method

"Whenever you introduce a new technology like this, contractors don’t always jump on it because there’s a fear that it’s going to be difficult to build. One of the beauties of [our composite bridge system] is that it’s built exactly the same way as you would build a steel girder or a concrete girder bridge."

Bill Davids

Chair of Civil and Environmental Department, University of Maine

Lighter Means Faster

"A lot of our time-saving activities once we got to the superstructure were absolutely governed by the weight of the girders themselves and the ability to do more things at once"

Brian Emmons

Project Manager, T Buck Construction

Expertise and Experience Drive Innovation

"It’s a combination of people who know how to build things, how to design things in the real world, plus our knowledge at the University in composite materials. Putting all that together really helped us develop the very unique secret sauce that I think will change how composites will be built in the future."

Dr. Habib Dagher

Advanced Structures and Composites Center, U. of Maine

Faster Than Expected and No Issues

"Even though we knew this would be erected really quickly out in the field, the speed surprised us. It didn’t take very long for them to get their tubes in place, to get all the decking in place and start the backfill process. When you walk into a brand-new product like this, there is a certain level of risk. But there were just no issues at all with the construction."

Mark Gaines

Washington State DOT Bridge & Structures Engineer

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