Working with CO2-reduced concrete mixes
Due to its unique physical properties, concrete has become indispensable in modern construction, especially when building or renovating key infrastructure. In the USA, for example, one in three bridges is in urgent need of major repair or replacement. Europe is facing similar challenges. In Germany, approximately 16,000 bridges require modernisation. Concrete is also essential for creating housing for a growing global population because by 2050, an additional 2.5 billion people will need housing.
Standard concrete contains cement. When taking a closer look at conventional concrete, approximately 80% of greenhouse gas emissions are emitted by cement clinker, which is thus responsible for a significant portion of greenhouse gas emissions (GHGs). Two main processes contribute to this climate problematic. First, the burning process, in which raw limestone is converted into cement clinker, requires very high temperatures (1,450°C), which means high fuel consumption and related emissions. Second, the chemical reaction during the burning process also releases CO2.
CO2-reduced concrete is significantly reduced in its potential to emit greenhouse gases compared to standard concrete. A key lever for this reduction in emissions is the radical reduction of clinker content. Reducing the clinker content in cement also reduces the associated CO2 emissions.
These new concrete mixtures behave differently from conventional concrete. The clinker, which contributes to rapid strength development, is environmentally harmful due to the high CO2 emissions in the burning process. When the clinker content is reduced, concrete takes longer to harden, especially in low temperatures. As a result, the formwork material has to remain on the construction site for a longer period of time, thereby increasing costs and resource use for the construction company.
Our contribution to the decarbonisation of the construction industry is based on our own commitment to achieve net-zero emissions by 2040 and to create a long-term perspective for concrete construction through product innovation for our customers.
Steady, ongoing decarbonisation is a key element of our sustainability strategy. As one of the world's leading formwork manufacturers, we operate at the interface between formwork and concrete. We are developing new technologies to reduce CO2 in concrete and incorporating the latest research and results from our pilot projects. We also work closely with concrete producers and contractors. In the near future, intelligent formwork systems will help us to use environmentally friendly concrete cost-effectively on construction sites around the world.
Our goal is to continuously change concrete for the better to create concrete that is fit for a green future. By using advanced formwork technologies and continuously focusing on innovation, we aim to create added value for our customers, the industry and the environment.
Our mission is to support our customers in the development of CO2-reduced concrete mixes and their safe and efficient use on construction sites.
Benefit from individual consultancy from our experts on how to reduce CO2 emissions in your concrete construction projects. Tailored consultancy and laboratory services aim for the reduction of energy consumption in concrete processing. Realise the potential by optimising concrete mixes and processes.
CO2 reduced concrete takes longer to harden, especially in low temperatures. Therefore it is all the more important to gain real-time insights into the early age strength development of the concrete structure. Our concrete monitoring solution Concremote measures early age compressive strength of concrete on site or at the precast plant. Thus CO2 reduced concrete can be managed efficiently and economically.