Rockpore CLWA™
Circular Lightweight Aggregates (CLWA™) with high strength-to-density ratio
CLWA™ for circular structural concrete
Aggregate product according to ENS 13055
High strength-to-density ratio
Made from recycled concrete, glass and waste materials from the mining industry
Natural and manufactured aggregate replacement
Low carbon and zero waste production process
Born circular, as it can be re-processed into same product at the end of its life.
Research Projects
Circular Design and low Carbon Footprint
Areas of Potential Use
ZeroC* Precast Geopolymer Concrete
A mix design for a 100% circular ZeroC precast concrete is under development, utilizing our low carbon aggregates and a binder developed by our partner Gerosion in the AlSiment, “umhverfisvænn arftaki sements” project.
These circular precast units will have the lowest carbon footprint of any concrete on the market today.
* a reference to carbon neutrality
CLWA™ for Marine Applications
A circular aggregate, designed to replace coarse and fine natural aggregates in structural geopolymer concrete for marine applications.
Patent pending
CLWA™ for Structural Concrete
A low carbon and circular aggregate, designed to produce high-strength circular concrete while reducing CO2 footprints, is scheduled for release in both the EU and US markets by 2024.
Patent Pending
Our Team
We have established a cross-functional team to support our company and to increase our innovation ability.
Our team at Rockpore is made up of talented professionals with backgrounds in industrial and institutional research, twin transition between green technology development and digitalisation, strategy, corporate sustainability, finance, international law, entrepreneurship and technology.
CLWA™ competitive advantage
Our CLWA™ (Circular Lightweight Aggregate) is an ideal substitute for coarse aggregates in structural concrete *. Its superior strength-to-density ratio and round shape facilitate its use across diverse structural concrete formulations.
By incorporating recycled concrete into the production of new CLWA™, we enable the creation of circular structural concrete with equal or enhanced mechanical properties, significantly reducing carbon emissions for any structural concrete application.
Statement on Structural Concrete (SC*)
From Waste to Value: Circular Structural Concrete Technology
Rockpore CLWA™ has the potential to partially replace natural aggregate in high strength structural concrete (SC).
Its enhanced strength-to-density ratio has the potential to reduce concrete volume, reinforcement bars, cement use, and transportation costs, while also lowering the construction process's carbon footprint.
This innovation aligns structural concrete with circular economy principles, transitioning it from being part of the problem to becoming part of the solution for a green economy
Finn Erik Solvang, Founder
Rockpore CLWA
Thermally Bonded Aggregate/Granulate
Designed for high strength structural concrete (45-100MPa)
Particle size: 2-24mm
Crushed or granulated (round) shape
Bulk density 650-900 kg/m3
Compressive strength 45-150MPa
Recyclable and can be re-processed into same material end-of-life (EoL)
Made from recycled industrial waste materials (>96%).
* Structural Concrete (SC)
Structural concrete is a type of concrete specifically designed and formulated to bear structural loads and stresses in construction projects. It is characterized by its high strength (45MPa to 100MPa), durability, and ability to withstand compressive forces, making it suitable for use in the construction of elements such as beams, columns, slabs, foundations, and other critical load-bearing components. Structural concrete is commonly reinforced with steel rebar or other reinforcing materials to improve its tensile strength and to handle both compression and tension forces effectively. It is a key material in the construction of buildings, bridges, dams, and other infrastructure projects where stability and safety are paramount.
