An ultra-reactive low CO2 binder for mortar

To help reduce the carbon footprint of the cement and concrete industry, Imerys offers a low CO2 ultra-reactive mortar binder technology solution.

Main project's drivers for reducing the greenhouse gas (GHG) emissions

noun_Low Fat_3488837Created with Sketch.

Energy and resource efficiency

noun_Ecology_1351672Created with Sketch.

Energy Decarbonisation

noun_Energy Efficiency_1362024Created with Sketch.

Energy efficiency improvements

non-energetique levierCreated with Sketch.

Improving efficiency in non-energy resources

noun_absorptive capacity_3636324Created with Sketch.

Emission removal

financement iconCreated with Sketch.

Financing low-carbon issuers or disinvestment from carbon assets

financement iconCreated with Sketch.

Reduction of other greenhouse gases emission

Project objectives

Reducing the carbon footprint of concrete by developing a new range of bindings.

Detailed project description

Carbon emissions of the cement and concrete industry represents around 8% of the world CO2 emissions. To contribute to the reduction of cement carbon footprint, Imerys is developing an ultra-reactive and low CO2 concrete.

The innovation is Imerys advanced range of specialized calcium aluminate’s binders. It dissolves much more rapidly in water that traditional calcium aluminate. This ultra-reactivity enables Imerys clients to adjust their formulations, and to reduce the global quantity of binder used in fast concrete setting, and dry mortar, while keeping the same performance level.

Diminishing the binder content can reduce CO2 emissions by 40% in technical mortar application. This contributes to reducing the global impact of the construction sector.

Emission scope(s)

on which the project has a significant impact

Scope 1

Direct emissions generated by the company's activity.

Scope 2

Indirect emissions associated with the company's electricity and heat consumption.

Scope 3

Emissions induced (upstream or downstream) by the company's activities, products and/or services in its value chain.

Emission Removal

Carbon sinks creation, (BECCS, CCU/S, …)

Avoided Emissions

Emissions avoided by the activities, products and/or services in charge of the project, or by the financing of emission reduction projects.

Scope 1 – Manufacturing of U-Technology binder  

  • Quantification : 775 kgCO2e/t of mortar

Scope 2 

  • Quantification : 95 kmCO2e/t of mortar

Scope 3 

  • Quantification : 30 kmCO2e/t of mortar

Avoided Emissions – Reducing need of binder for concrete and dry mortar

  • Quantification : 90 kmCO2e/t of mortar

The solution contributes to reducing downstream emissions of Imerys clients. Thanks to a reduction of the binder ratio from 25% to 15%, the carbon footprint CO2 (kg CO2/t mortar) will be reduced by 40%, compared to a technical mortar formulated with ordinary Portland cement (OPC). CO2 emissions linked to the binder manufacturing are based on the first prototype data, and will be actualized as the project progress.

To compute emission reduction linked to the decrease in binder’s ratio in the formulation, an emission factor of 896 kgCO2e/t of OPC (CEM 1) has been used. 

Key points

GroupCreated with Sketch.

Invested amount

10 M€

noun_date_1379066Created with Sketch.

Starting date of the project


noun_position_2125941Created with Sketch.

Project localisation

Lyon and Fos Sur Mer, France

Project maturity level

Prototype laboratory test (TRL 7)

Real life testing (TRL 7-8)

Pre-commercial prototype (TRL 9)

Small-scale implementation

Medium to large scale implementation

Economic profitability of the project (ROI)

Short term (0-3 years)

Middle term (4-10 years)

Long term (> 10 years)

Illustrations of the project

This project contributes to SDG goal 12 “Ensure sustainable consumption and production patterns”. In fact, the binder’s ratio in the formulation is reduced. It thus contribute to the SDG target 12.2 : “ By 2030, achieve the sustainable management and efficient use of natural resources”.

This technology has a wide range of potential applications. Research continues to develop additional applications.

Partnerships with private actors (major manufacturers of ready to use mortar industry) have been engaged

noun_Mail_1571628Created with Sketch.

Contact the company carrying the project :

Imerys’ other projects :