Was machen andere? - Celitement

On this page we refer to projects and concepts from other building material manufacturers and technology suppliers to reduce specific CO₂ emissions in cement and concrete production. Click on the logo to open the link to further information.

Not all approaches are really new or are characterized by groundbreaking technological leaps. But make up your own mind. However, the diversity of the approaches encourages us to achieve our common goal of making cement and concrete production climate-neutral by 2050.

We limit ourselves here to technologies for reducing, capturing or using CO₂ in the context of cement production. Construction approaches, circular economy and recycling are further elements that we may incorporate at a later point in time.

Products

Aalborg Portland Cement - Futurecem®

Futurecem is a Portland- composite cement developed in Denmark, based on calcined clay and limestone [CEM II/B-M (Q-LL) 52,5N].

LafargeHolcim - Aether

An EU funded project for the production of a cement (CSAB) based on calcium sulfo- aluminate belite clinker.

bioMASON - bioLITH®

Mikroorganisms produce a biocement® which can be used to produce e.g. “concrete goods”.

Buzzi-Dyckerhoff - Next Base

NEXT BASE (CSA) is an hydraulic binder based on calcium- sulfoaluminate-clinker.

CEMBUREAU - Europäischer Verband

The European Cement Association and its collection of references to projects aiming to make cement and concrete climate-neutral in 2050. Interactive map of Europe with links to 70 innovative projects to reduce the carbon intensity of the cement industry.

Ecocem - blast furnace slag based binders

A supplier of slag powder and slag cement (CEM III / A) from Ireland who offers its products due to the low spec. CO₂ from the blast furnace slag marketed as “ecocement”.

GCCA - Global Cement and Concrete Association

The worldwide organization of cement and concrete manufacturers and its collection with references to interesting products related to the goal of achieving climate neutrality for cement and concrete by 2050.

Heidelbergcement - Ternocem®

Cement made on the basis of a calcium sulfoaluminate belite clinker containing ternesite.

Hoffmann Green Cement

French manufacturer of Portland cement-free binders based on geopolymer and alkali-activated slag. H-PLA = geopolymer cement; H-UKR = alkali-activated slag cement; n H-EVA = alkali-activated ettringite cement.

Solidiatech -Solidia

Binder and technology that enables building materials (e.g. concrete goods) to be produced by carbonating special clinker containing wollastonite.

Ciments Vicat – Alpenat-Up

A French cement manufacturer that produces a binding agent based on calcium sulfo- aluminate clinker (CSA).

TecEco Pty. Ltd - Eco-cement

A magnesium hydroxide-containing eco-cement from Australia that generates its strength from the carbonation of brucite (Mg (OH)₂).

Zeobond - E-Crete

Australian development of alkali-activated geopolymer cements, especially using fly ash.

CarbiCrete

Concrete goods that are produced with carbonation (absorption of CO₂) from industrial residues.

ZOZ-GmbH – Futur-Zement

German company that developed a reactive, highly slagged cement through special ultra-fine grinding of blast furnace slag.

University of Tokyo

Researchers at the University of Tokyo have developed a process to "stick" together aggregates such as sand with silanes directly. So a kind of “concrete or mortar” without any classical cement.

TerraCO₂

TerraCO₂ is a scalable, low-carbon alternative for cement replacement. Feedstock are Silicate-based igneous rocks (such as granite) and unconsolidated sediment (such as sands and gravels) are the most abundant rock materials at Earth’s surface.

Materrup

Materrup produces concretes based on not calcined but chemically activated clays. The process is controlled by a specially designed, software-based quality assurance system. It may be classified as geopolymer-like (alkali-silicate) crosslinking.

Brimestone

Brimstone uses non-carbonate, calcium-containing raw materials (e.g. basalt) via a wet-chemical process. By this process three groups of substances are obtained. A hydraulically active substance (cement), reactive SiO₂ (SCM or pozzolan) and a residual product containing magnesium that can absorb and firmly bind CO₂. So the company is working on making carbon-negative cement with carbon-free calcium silicate rock instead of limestone.

Technologies

Fortera (Calera)

The so-called ReCarb™ process separates CO₂ and uses calcium carbonate as a mineral building material. So this is a kind of mineral sequestration (carbon capture) of CO₂.

Carbon Cure Technologies

CO₂ is introduced into concrete as a crystallization accelerator (“seeding”), in particular to increase the early strength. This enables the CO₂ balance of concrete to be reduced by saving Portland cement.

Carbon8 – ACT= Accelerated Carbon Technology

Via an accelerated carbonation process, CO₂ is permanently incorporated in construction materials. Besides applications in recycling, the treatment of. E.g. flue dusts from clinker production is a mayor field of application.

CI4C – Cement Innovation for Climate

Project to set up the world's first furnace line on a pilot scale that works according to the oxyfuel principle (2nd gen.). The plant is being built in Germany (Mergelstetten) jointly by the companies Schwenk Zement, Dyckerhoff-Buzzi-Unicem, Vicat and HeidelbergCement.

Calix

Calix is the provider of technology for the so called LEILAC-process (cf. LEILAC I+II) and has taken over the over the patents of the 2012 liquidated British start-up Novacem (M-S-H/brucite/hydromagnesite).

Solpart – Thermal decarbonization of limestone using solar energy

EU project for the use of solar energy for the deacidification of cement raw meal in the temperature range of 800-1000 ° C.

LEILAC (I+II) Low Emission Intensity Lime And Cement Projekt

EU-Horizon2020 project for the indirectly heated calcination of limestone meal and cement raw meal in order to obtain exhaust gases with maximally high CO₂ contents for carbon capture.

CemZero – Vattenfall&Cementa, electrified clinker production

Project in Sweden between the energy producer Vattenfall and the cement manufacturer Cementa to replace the thermal energy of the classic clinker process with electricity.

Orbix – Carbstone

Concrete goods that get their strength through carbonation.

FastCarb

French project for the rapid carbonation of recycling aggregates.

Mitsubishi Corporation - CO2-SUICOM

A concrete that hardens through carbonation.

OKABIO

A technology that absorbs CO₂ through bacteria.

BluePlanet

Carbon capture for the production of synthetic carbonates to replace natural limestone as a raw material (see Calera).

GCCA - Global Cement and Concrete Association

Reference to projects and products to reduce the carbon footprint of cement and concrete. These are displayed at the end of the website under “Project Links”.

Carbfix - permanently store CO2 in basalt rock

Concept for Carbon capture storage (CCS) that dissolves captured CO₂ in water and binds it firmly into basalt and other natural rock formations via rapid carbonation. There are interesting opportunities for that e.g. in Iceland.

ECRA

In 2017, the ECRA (European Cement Research Academy) compiled and evaluated a large number of technical possibilities for improving the ecological footprint in cement production in a comprehensive review paper.

CarbonBuilt TM

The Reversa^TM – process uses Portlandite (Ca(OH)₂ that is later carbonated using waste CO_2.

CarbonBuilt's core technology emerged out of the University of California, Los Angeles (UCLA). Concrete for paving stones is cured with waste CO₂ emissions using a process that is said to not require expensive capture, compression or purification of the CO₂.

ECOncrete®

ECOncrete®'s technology(the admixture) addresses the chemical composition of the concrete, as well as its micro and macro surface, on a micro and macro level. This promotes the growth of organisms like oysters, corals, or barnacles, which act as biological glue, enhancing the strength and durability of marine structures, and adding to their stability and longevity. We call it bioprotection.

Sublime Systems

Sublime is a start-up founded from MIT researchers sand uses electrolysis to obtain the starting materials for the formation of C-S-H phases, i.e. the "glue" in concrete and mortar. Theses C-S-H phases are based on calcium oxide, CaO, in this case provided as electrochemically produced Ca(OH)₂. Sublime has developed an all-electric process that not only works with limestone the main raw material used in cement production. It can also extract Ca(OH)₂ from calcium minerals that do not contain CO₂.

Prometheus Materials

Inspired by the composition of coral and seashells, the process combines microalgae with other natural components to form an ultra low-carbon bio-cement and bio-concrete. The solution is protected by Intellectual Property that is licensed from the University of Colorado Boulder.

neustark

With the developed technology of carbonating recycled concrete, around 10 kg of CO₂ are to be stored in one cubic meter of concrete. The concrete granulate treated in this way is added to the fresh concrete as a substitute for gravel and is intended to save cement by accelerating the hardening process.

Geoprime®

The Geoprime products from Betolar are based on a geopolymer solution. Geoprime concrete consists of components from industrial side streams and Betolar’s proprietary Geoprime activator and uses no cement.

Carbon Upcycling

Carbon Upcycling is a waste and carbon utilization company. The technology takes industrial byproducts or natural minerals and combines them with a CO² source (either from low or high-purity CO² sources) in a catalytic reactor using mechanochemical principles based on exfoliated nanoparticles.

Research projects

ANiCa (Advanced Indirectly Heated Carbonate Looping Process)

EU project to develop an indirectly heated “carbonate looping” process. Application of the IHCal process, i.e. indirectly heated carbonate looping. Quicklime from clinker production is used as a sorbent for CO₂.

AC2OCem (Accelerating carbon capture technology in cement production)

Also the Association of German Cement Works is also working on this project to accelerate CO₂ capture with oxyfuel technology.

CLEANKER – CLEAN clinKER - Calcium looping for CO2 capture in cement plants

A Horizon2020n EU project that tests a new type of carbon capture (CC) process on a pilot scale in a Buzzi-Unicem cement plant in Italy (Vernasca).

EU-Commission – Research and Innovation

Informationplatform: Non-exhaustive list of technological pathways and examples of projects in the cement sector.

LC3– Limestone Calcined Clay Cement

EPFL (Lausanne, Switzerland) project on composite cements based on calcined clays and limestone powder.

Ciment Vicat- Cimentalgue

CO₂ from cement plants for the production of biomass in the form of microalgae.

CO2 WIN

What are others doing?