What CemGreen does

CemGreen ApS is a Danish cleantech company that develops and commercializes proprietary flash-calcination technology for producing low-carbon supplementary cementitious materials (SCMs) used to replace clinker in cement and concrete. Founded in 2016 as a University of Copenhagen spin-out by CEO Lasse Nørbye Døssing, the company is headquartered in Roskilde/Hobro, Denmark, and operates with a team of 30+ employees. CemGreen's customers are primarily cement manufacturers, concrete producers, and mining companies seeking to decarbonize cementitious supply chains through clay-based clinker substitution.

CemGreen's core product is CemTower®, a proprietary flash-calcination reactor that thermally activates low-grade clays into high-reactivity SCMs, marketed under the NovaClay brand. The portfolio also includes CemDryer™ for clay drying and a Full Plant Automation offering. Business model mechanics combine equipment supply and engineering services with joint-venture plant ownership: CemGreen anchors multi-party JVs (NovaClay A/S with CRH in Denmark; a Saudi Arabia consortium with City Cement, Nizak Mining Company, and Next Generation SCM targeting 350,000 tonnes annual capacity in 3Q 2025) and licenses its technology into host cement operations. NovaClay has been certified under DS/EN 206, the European concrete production standard, enabling use in compliant structural concrete.

The commercial footprint remains narrow, anchored on a small set of named counterparties, with the Saudi facility representing the principal near-term scale-up lever. Capitalization to date includes an approximately $1.66 million European Innovation Council grant awarded in May 2020; no priced equity financing rounds are disclosed in the supplied data.

Name

CemGreen

Legal name

CemGreen® ApS

Website

https://cemgreen.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

CemGreen ApS is a Danish cleantech company that commercializes proprietary CemTower® flash-calcination technology to produce low-carbon calcined-clay supplementary cementitious materials, serving cement manufacturers and concrete producers through JV-based plant deployments and equipment supply.

Ownership category

akta.pro rank

Product category

Cement processing equipment and clay calcination technology

NAICS

Cement Manufacturing (327310)

SIC

Cement, Hydraulic (3241)

akta.pro primary industry

Cement Manufacturing (Portland, Blended & Specialty) (IMADAAAG)

akta.pro secondary industry

Kaolin & Ball Clay (IMAEAFAB)

Keywords

• Clay calcination equipment
• Supplementary cementitious materials
• Cement decarbonization technology
• Low-carbon concrete production
• Calcined clay manufacturing

Headquarters

HQ city

Roskilde

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Equipment Sales (CemTower® and CemDryer™): Sale of proprietary cement and clay processing equipment to cement manufacturers. Equipment is scalable to customer production volume requirements.
2. Engineering, Procurement & Commissioning Services: Full CemTower plant engineering services carried out by highly skilled and experienced engineering team tailored to customer requirements, including procurement services and commissioning services.
3. Project Management Services: CemGreen project management services ensuring smooth project execution for plant installations.
4. Automation Services: Full plant automation services provided by CemGreen automation team for optimal operational performance.
5. Technology Licensing: Licensing of patented CemTower technology for calcined clay production. Achieves 95-100% reduction in CO2 emissions for each tonne of Portland cement replaced.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

CemGreen develops, manufactures, and sells CemTower®, a compact modular clay calcination system that integrates pre-heater, kiln and cooler to produce calcined clay supplementary cementitious materials (SCM) for the cement industry, achieving 95-100% CO2 emission reduction per tonne of Portland cement replaced. The company also offers CemDryer™ drying equipment and a full portfolio of engineering, procurement, commissioning, project management, plant automation, and raw material testing services tailored to cement manufacturers.

Product overview

CemGreen offers a unified technology portfolio anchored by the CemTower® system, a compact modular platform for clay calcination that integrates pre-heater, kiln, and cooler in a single unit. This core technology is complemented by the CemDryer™ for product drying applications. The company also produces NovaClay, a calcined clay supplementary cementitious material (SCM) through its CRH-CemGreen joint venture NovaClay A/S. Supporting services include full plant engineering (procurement, commissioning), project management, plant automation, and raw material testing—all delivered through CemGreen Production's facility in Hobro, Denmark, which houses the company workshop, laboratory, and CemTower® Pilot Plant test facility.

Differentiator

Problem solved

Functional benefit

Brands

• CemTower®: Compact modular design integrating pre-heater, kiln and cooler for clay calcination, designed for maximum energy and cost efficiency
• CemDryer™
• NovaClay

Products and services

• CemTower® Compact modular clay calcination system integrating pre-heater, kiln and cooler in a single unit, designed for maximum energy and cost efficiency and scalable to customer production volume. Supports all fuel types and processes all clay types, enabling production of high-reactivity calcined clay SCM that achieves 95-100% CO2 emission reduction per tonne of Portland cement replaced. Sold to cement manufacturers.
• CemDryer™ Compact dryer system ensuring high energy and cost efficiency, scalable to customer production volume requirements with versatile product drying capability. Supports all fuel types and processes all clay types. Sold to cement producers and other industrial customers needing drying equipment.
• NovaClay SCM Calcined clay supplementary cementitious material produced using CemTower® technology through the NovaClay A/S joint venture with CRH. Enables high clinker replacement ratios in concrete applications and delivers 95-100% CO2 emission reduction per tonne of Portland cement replaced. Certified under DS/EN 206.
• Engineering, Procurement and Commissioning Services Full CemTower® plant engineering, procurement, and commissioning services carried out by CemGreen's engineering team, tailored to customer requirements to ensure optimal equipment setup and plant performance. Sold to cement manufacturers installing CemTower® plants.
• Project Management Services Dedicated CemGreen project management services ensuring smooth execution of CemTower® plant installations for cement manufacturer customers.
• Full Plant Automation Services Full plant automation services provided by CemGreen's automation team to ensure optimal operational performance of CemTower® plants. Sold to cement manufacturer customers deploying CemGreen equipment.
• Raw Material Testing Services In-house raw material testing facility and laboratory services supporting customer product development, local certification, and commercial planning for clay-based SCM production. Sold to cement and concrete manufacturers evaluating or scaling CemTower® deployments.

Quantifiable outcome

• 95-100% reduction in CO2 emissions for each tonne of Portland cement replaced by calcined clay SCM produced using CemTower technology
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core and flagship.

• City CementcoreTechnology or Integration · 1 January 2025City Cement's subsidiary Nizak Mining Company partnered with UK-based Next Generation SCM to establish a joint venture using CemGreen's patented CemTower technology. The venture launches Saudi Arabia's first calcined clay SCM production facility with initial annual capacity of 350,000 tonnes, aiming to double by second year. Achieves 95-100% reduction in CO2 emissions for each tonne of Portland cement replaced.
• Next Generation SCMcoreStrategic or Co-development Partner · 1 January 2025UK-based industrial group partnering with City Cement's Nizak Mining Company and using CemGreen's technology for a groundbreaking joint venture producing low carbon concrete in Saudi Arabia. The joint venture will launch Saudi Arabia's first calcined clay SCM production facility with mass production slated to begin 3Q25.
• NovaClay A/S (CRH Joint Venture)flagshipStrategic or Co-development PartnerCRH and CemGreen joint venture NovaClay A/S operates the first CemTower plant in operation, producing calcined clay SCM (supplementary cementitious material) for sustainable concrete production. NovaClay has received official certification under concrete standard DS/EN 206, approved for all exposure classes up to XF1 for use in Danish construction including residential, commercial, foundations, walls, and prefabricated elements.
• Nizak Mining CompanycoreTechnology or IntegrationSubsidiary of City Cement founded to secure low-carbon raw materials for domestic consumption. First major achievement was the launch of a joint venture with Next Generation SCM to localize production of calcined clay using CemGreen's modular CemTower technology.

Scale indicators4 records

Recent moves3 records

Expansion highlights5 records

Direct peers

• FLSmidth: Global supplier of cement and minerals processing equipment, including kilns, pre-heaters, and pyroprocessing systems. Directly comparable to CemGreen because CemTower® competes head-to-head with FLSmidth's pyroprocessing lines for clay calcination and cement plant engineering.
• Thyssenkrupp Industrial Solutions (tkIS / Polysius): Supplies cement plant technology including kilns, pre-heaters and calcination systems (Polysius brand). CemGreen's CemTower® modular pre-heater/kiln/cooler competes directly with Polysius-fired pyroprocess installations for new-build and retrofit SCM/cement lines.
• KHD Humboldt Wedag: Engineers and supplies cement pyroprocessing and grinding equipment, including pre-heater/kiln systems. Highly comparable to CemGreen as an alternative vendor for clay calcination and clinker-reducing technology sold into cement producers.
• LOESCHE: Specialist in vertical roller mills and calcination/drying systems for cement, slag, and cementitious materials. Comparable to CemGreen as a focused calcination/drying equipment provider targeting the same cement producers with complementary (grinding/drying) technology.

Emerging players

• Prominer (Shanghai Prominer / calcination equipment suppliers): Mineral processing and calcination equipment supplier offering rotary kilns and calcining systems. Comparable as a lower-cost equipment competitor targeting similar clay/kaolin activation markets in cement and SCM applications.
• Solidia Technologies: Low-carbon cement and concrete technology startup focusing on CO₂-cured binders. Comparable as an emerging low-carbon cement solutions provider competing for the same decarbonization-driven capex budgets at cement manufacturers.
• Brimstone (Brimstone Materials): Startup developing carbon-negative Portland cement using novel calcium-silicate feedstocks. Comparable as an emerging, well-funded rival pursuing cement decarbonization through a different (non-clay-calcination) pathway.
• CarbonCure Technologies: Commercial CO₂ utilization technology for concrete production. Comparable as an emerging adjacent decarbonization technology competing for sustainability budget and customer mind-share in the low-carbon concrete ecosystem.

Broad incumbents

• Metso (Metso Outotec): Global industrial process equipment supplier covering mining, aggregates, and industrial minerals including calcining. Comparable as a broad incumbent that provides calcination equipment into overlapping cement-adjacent markets.
• CRH plc: One of the largest global building materials groups and CemGreen's JV partner in NovaClay A/S. Comparable because CRH is both a strategic partner and a downstream cement/concrete incumbent that defines adoption and competitive dynamics for calcined-clay SCM.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CemGreen