Chryso and Ecocem combine their expertise to accelerate the development of low-carbon concrete

Paris, 1 October 2026 – At BATIMAT 2026, Chryso and Ecocem are unveiling a new solution resulting from their complementary expertise: Ecocem ACT low-carbon cement technology combined with EnviroMix® 3150 ACT, a new EnviroMix® admixture solution that was co-developed by Chryso and Ecocem.

This collaborative effort is intended to streamline the formulation, production, and placement of high-performance, low-carbon concrete, thereby accelerating its widespread adoption. 

Less clinker, high-performance concrete: A formulation challenge

Reducing clinker content is now recognised as one of the most effective ways of decarbonising cement. ACT technology, developed by Ecocem, directly addresses this challenge. However, to ensure the optimal durability of concretes produced with ACT technology, admixture solutions must be adapted accordingly.This is precisely where Chryso’s expertise in construction chemistry comes into play.

In close cooperation with Ecocem, Chryso’s R&D teams have developed a new EnviroMix® superplasticizer, that is specifically formulated for use with Ecocem ACT cement. The EnviroMix® range, dedicated to low-carbon concrete, has expanded significantly in recent years to support the rapid evolution of cement technologies. EnviroMix® 3150 ACT is the latest milestone in this journey.

“Decarbonising concrete is not just about developing new cements. It also requires admixture technologies that can unlock their full potential. Leveraging its expertise in construction chemistry, Chryso develops solutions that address the performance and implementation challenges associated with low-carbon concrete. Our ambition is to accelerate the adoption of these solutions on a large scale by providing concrete producers with effective, robust and easy-to-implement products that integrate seamlessly into industrial production processes.” – Frédéric Guimbal, Vice President Performance Segment, Construction Chemicals – Saint-Gobain

(from left to right: Frédéric Guimbal, Vice-President Construction chemicals performance segment – Saint-Gobain and Olivier Guise, Executive Director – Ecocem)

From cement innovation to concrete innovation

The collaboration between Chryso and Ecocem is based on two complementary innovations. Ecocem ACT is a low-carbon cement technology that can reduce cement carbon emissions by up to 70%. Chryso provides its admixture expertise to adjust to the specific chemistry of this new type of binder, while delivering the essential properties required for concrete production and placement.
This collaboration has already resulted in two patent applications being filed, which highlights the innovative nature of the jointly developed solution.

‘While the decarbonisation of construction necessarily involves innovations in cement, such as Ecocem ACT, it also requires a holistic approach that evolves every component of concrete. Our collaboration with Chryso is a perfect illustration of this vision. Together, we are showing that it is possible to combine a low carbon footprint with high technical performance and ease of use, thereby accelerating the adoption of these new solutions throughout the construction industry.” – Olivier Guise, Executive Director – Ecocem 

EnviroMix® 3150 ACT: Performance tailored to the requirements of low-carbon concrete.

When combined with Ecocem ACT cement, EnviroMix® 3150 ACT allows concrete mix-designs to reach a reduction in carbon footprint over 50%, corresponding to GWR5 classification and beyond.
This highly durable concrete solution offers high flowability and low viscosity, even at low water-to-cement ratios. It is also robust against variations in water content and delivers workability retention of over 90 minutes, which can be further extended without segregation.

A technology already proven on construction sites in the United Kingdom

In the United Kingdom, Ecocem ACT technology is currently being used in the refurbishment of the former John Lewis headquarters in London, where nearly 1,300 m³ of low-carbon concrete will have been poured by the end of the year.

For this project, C20/25 and C30/37 concrete mixes incorporating Ecocem ACT have been developed. Using EnviroMix® 3150 ACT ensured 90-minute workability retention and excellent pumpability. This real-world application provides valuable feedback under actual job-site conditions, representing an important step in the development of this new generation of low-carbon concrete.

Collaboration around Ecocem ACT and EnviroMix® 3150 ACT also opens the door to new opportunities, with additional areas of cooperation already being explored to support the continued development of low-carbon cements and concretes.

Media Contacts
For interview requests or visual materials:

Press Office
Agence Comme ils disent
Chloé Méhat – [email protected] – +33 (0)6 89 57 84 63

About Chryso

Chryso, a brand of Saint-Gobain Construction Chemicals, is a global leader in chemical solutions for more sustainable construction. As part of the Saint-Gobain Group, the worldwide leader in light and sustainable construction operating in more than 80 countries with over 162,000 employees, Chryso develops innovative solutions for cement, concrete and construction systems.

Drawing on its expertise in construction chemistry, Chryso’s breakthrough technologies help reduce energy consumption, lower the carbon footprint of cement and concrete, promote the use of alternative materials and accelerate the development of the circular economy.

For more information: www.chryso.com

About Ecocem

Ecocem is a pioneer in high-performance technologies that help reduce CO₂ emissions in the cement and construction sectors by 50% by 2030 and support the transition toward a more sustainable future.

Its low-carbon cement technology, Ecocem ACT, can reduce the carbon footprint of traditional cement manufacturing by up to 70%. For 25 years, Ecocem has been developing, manufacturing and supplying low-carbon cements and construction solutions to European markets.

The company operates production facilities in France, the Netherlands and Ireland, with an annual production capacity exceeding 2 million tonnes. Its solutions have been used on landmark projects including the Grand Paris Express, the Paris 2024 Athletes’ Village, Dublin’s Aviva Stadium and the UK’s HS2 high-speed rail project, contributing to a cumulative reduction of 18 million tonnes of CO₂.

Its investors include Saint-Gobain, Breakthrough Energy Ventures and ArcelorMittal.

In June 2026, Ecocem France, together with Bouygues Construction, CB Green and POINT.P, launched the ABCD Alliance (Action Béton & Ciment Durables) to accelerate the decarbonisation of the construction sector.